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`392119830 SR
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`Och 12: 1955
`
`Filed May 1. 1961
`
`H. w. SARGENT, JR
`PAY TELEVISION SWITCHING AP?ARA.TUS
`
`3,211,830 -
`
`4 Sheets—Sheet 1
`
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`PMC Exhibit
`
`Apple v.
`|PR2016-
`P
`
`xvm
`
`yEn.3._Ea.
`
`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 1
`
`
`
`
`
`

`
`Oct. 12, 1965
`
`Filed May 1. 1961
`
`H. W. SARGENT, JR
`PAY TELEVISION SWITCHING APPARATUS
`
`3,211,830 '
`
`4 Sheets-Sheet 2
`
`_,_PREv:Ew
`
`
`
`FNVENTOR.
`H. W. SARGENT, JR.
`
`BY
`
`7 Md
`QTTORNEYS
`
`PMC Exhibit
`
`Apple v.
`|PR2016-
`P
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`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 2
`
`

`
`Oct. 12, 1965
`
`H_ w, sAnc.;EN*r_ JR
`PAY TELEVISION swxrcnme APPARATUS
`
`3,21 1,830 '
`
`Filed May 1. 1961
`
`4 Sheets-Sheet 35
`
`:2mmpm:%
`
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`IN VENTOR.
`H. W. SJIRGENT, JR
`
`T G410! 7-
`A TTOHNE Y5
`
`PMC Exhibit
`
`Apple v.
`|PR2016-
`P
`
`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 3
`
`
`

`
`Oct. 12, 1965
`
`H, w. sARGEN-r_ JR
`FAY TELEVISION SWITCHING APPARATUS
`
`3,21 1,830 -
`
`Filed May 1. 1961
`
`4 Sheets—Sheet 4
`
`INVENTOR.
`H. W. SARGENT, JR.
`
`BY
`
`ATTOHNEY5
`
`PMC Exhibit
`
`Apple v.
`|PR2016-
`P
`
`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 4
`
`

`
`United States Patent Office
`3,211,830
`Patented Oct. 12, I965
`
`1
`
`2
`
`3 21! 830
`PAY TELEVISION siwri'cHING APPARATUS
`Horace William Sargent, Jr., Little Rock, Ark, assignor,
`by mee assignments, to Subscription Television, lnc.,
`New Yorlr,N.‘Y.,acorporation of Delaware
`Filed May 1, 1961, Ser. No. 106,799
`1 Claim (CL 173--5}
`
`vides top quaiity transmissions so as to minimize com-
`plaints and maintain customer relations at a reasonably
`good level. Aside from these factors, a practical disad-
`vantage of radio wave transmitted pay television carriers
`5 is that approval of the Federal Communications Com-
`mission must be obtained. This restricts design freedom
`and increases the economic cost.
`
`A5 can be, appieifiated fmm the f°r°3",m3 °°mm°“_t5=
`This invention relates to pay television systems and
`fiiom a Pmciicai iiiesigii and °usi°iiier.ieiaii°ii5 s.ta‘ii‘iP°iiit
`more particularly to a wired pay television system.
`The increasing attention being given to pay television 19 wired ‘iii’: ieiwisiiiii sysieiiis are dciiiiiieiy superior io RF
`systems in -the last few years and the advent of a number
`transmission Systems‘
`iiied siisieiiiis iequim ii° FFC‘
`of ambitious test projects that have been approved by the
`approval aiiii
`.3” iiiiaiiveiy unaffected by weather mid
`FCC make it quite clear that widespread interest is pregcnt
`gfigfifogggsgigggfegigifiigfigiemgiisflii ::hf£ai:?;il*1gm;E_y
`in means and methods for adding pay television c an-
`’
`.
`.'
`nels to the existing free commercial system.
`Indicative 15 reifiiy pii.°i"°ied by Piimmfiuiit Piciuws’
`iiaVe.c°iiia'n
`of the interest and activ-ity in this area are numerous pub-
`Efifiliiff iEi!::it‘;i]‘]:'i:;a:fisi:§i:§$:lifgsmigognfingmiggfifi
`lications and atents that are directed to different or al-
`,
`,
`.
`ternative systeilins. The most prominently publicized sys-
`iiubscnbei 3 home has been. diiiiiwii to oveicqiiie ecoimm‘
`tems to date are those which use complex electronic cir-
`‘wily’ The iii"°d.f°i Feiivice iiifin to periodicaiiy Foiiect
`cuitry for interleaving the pay TV program carriers be- 20 iii‘: iii_i.iiiiie,s deposiied in the com .dEmiiiid box inside the
`tween channels assigned for commercial televison broad—
`iiliéiciiber S imiiie aim argue against widespread accept‘
`‘
`'-
`'
`t
`th si
`ls
`'
`_
`_
`,
`_
`,
`_
`§ii;“iuiiiirififi53i¥e§§§l‘éi°i,;Z1i°{i£’i;§3.iiiofflt 2 cliiirige
`_The vnmal select of in Present Invention is 10 eo-
`signal by manual keying or deposit of coins_
`vide a pay television system which overcomes the prac-
`Exemplary of these types of systems is the one proposed 25 iicai aiifi economic iiiiiiiciiiiies ‘if both the RF transmission
`by Zenith and described in general terms in the December
`and wired tiiiiiiiiiiiisiiioii Systems. heiiiioforc iiieveiupiii
`1960 issue of Fortune Magazine at page 133. Their 50-
`Cieneiiiiiiy speakiiig’ the pieseiii‘. invention ii.°i.i oiiiy pm"
`called Phonevision system garbles broadcasts before trans-
`Elciteilgligis°:§"§flifi°:2P:1;f|$i‘:i‘:;fepgzcigécgifiiégufifiéigé
`mission and unga-rbles them at the receiver.
`It does so by
`.
`.
`.
`delaying certain of the scanning lines réelatgtc to“the hori- 30 tifgtciéi ggyclfinsigigiédeiI:_:3;r:f::n::§gigi:ni:;f:1:J:1ii:ci'
`zontal s nchronizi
`pulses.
`Instead o sen ing
`e square
`.
`.
`.
`.
`°
`’
`'
`waves that are usélg to break up the picture horizontally,
`ciigihy iiiiiit iiilm it‘
`I
`.
`.
`.
`.
`h
`a coded signal, that differs for each program, is sent. Ad-
`ct eiieiiipfiaiy .1”: ii? evgictiii sysieig consiiiuiiiig i S
`ditionally, the audio portion is scrambled by raising the 35 fags??? iti;i~_ili;:iiSi:i;i1 Erogcriifijiiise T:ep§;:ii;s‘;o1;'i3;i::t]:_:e
`iziss-*5*;.%.:is:r:::“.:;:::;s. :2 :°::t:r:i;::s::.
`bandglfverds gm;
`5." Sc"
`mm 93 e tau’ 81
`scrambles the pay program, punches a billing tape to co-
`is receiver:
`be i.ifieii,'ii Li?
`incide with the price for the program and records the in-
`Eiecoiiiiig “iii; 1: eiiiiqilg apgaiiaiiis it eiic 5“ 9:“ is 1:2"
`on a tape
`to .;‘:?..:°:;;:... 2332;; .:;:r;:;;:°:;:;:.:.:r ii;
`The disadvantages of non-wire pay te evision systems
`.
`.
`'
`have been discussed at length in the literature. Briefly, all
`:=°eiver'°°i:'Viii'ieih53iSie"i £3 aitiicheii i° iiitie iigiiir of iii:
`require complex electronic components to unscramble the
`‘mic iieiieiigii w liliiieif fit} B iiliijeteiibis, Pi: era fy p "ac:
`garbled Signm‘ Beyond the circuit complexity required’
`on an outst e_wa
`o
`c su sen ersl ome or rea y
`they have to be carefully tailored to an already ova“ 45 access by service personnel. The receiver-converter re-
`crowded commercial television spectrum. They must not
`‘res °ii.iaij ii sgliiiicg of atilileiiiiaiiiig iéoiiage’ agagiiiiitifiiiii to
`interfere with the allocated commercial channels nor the
`i coiiiii
`Ca . 6
`cm.
`6 main 5 3' “iii
`iiii
`°
`5 re’
`intermediate carrier frequencies in the 21-25 me. and
`°°i,.§:i' iiii§iiii:'ii)iii1i'iii1'iiitiiiitiIi:'iiiiiS‘
`“h thr
`ch
`I
`th t
`41-45 mc. ranges that are variously employed in current
`h d 3.5“ 5°“ Bi 5? cc: 6 °iie.°
`'5
`gab taiiiiefi ;
`mmercial flpcmfionsl
`e _es1res to monitor y pressing a pus
`u ton in t e
`°°Qu.tc aside from the Economic disadvantages of the
`-receiver-converter for free viewing and another for the
`complex circuitry which must be provided athcach sub»
`specific Pay iiiiiiiiiiiiiifiesiiieci.‘ This seiecis the desired pm"
`sci-iher’s set certain practical disadvantages are also pres-
`gram Ciiaiiiiei *i‘“d its caiiiiieiis and iiiinveris them to an
`ent
`For «inc thing in most non-wire systems
`the de~
`eiiipiy ciiiiiiiiici in the iiiiiiiii ‘ii. iii": ‘receiver from end‘ The
`coder and other sutiscriber set equipment is lobated on 55 piiiiiciiiiiir Ciiaiinei iii which it is coiiveried .depend5 upon
`the subscriber's television receiver and entry to the sub
`the iociii aim iiiit ciiaiiiiieifi is iised i.iiii5tiaiiiieiy.i'iiii°iigii'
`scriber’s house must be had in order to service or check
`Signggrggfiggilisfiifigripflfiigesgigngefihrgofiuisgfigifi :2:
`no
`made
`cigded Ssystems rathar employ billing tapes that Ian: sent an and the subscriber may obtain information about the pro-
`grams offered on the two pay television channels, the
`.
`f the month by the Subscriber or are ac_
`iii at the eiiii 0
`.
`.
`.
`b
`.11
`charges therefor and announcements of future programs
`iiiiaie.d by ciiinii ":"“°'-’* afiids to the iiimiwiiiiieiice
`Lit 5"
`that are to be available.
`If the subscriber then desires to
`iieqiiiiiiis peiimdiiii iiiSpe°.ii°.ii‘ Then i°°’.iii.m'wimd Systems
`view a program on one of the two pay television channels,
`also reflect the transmission characteristics of free ccrn-
`F be acmates the appropriate push button Switch to convert
`mirclal brqjldcastnlg’
`”_"°i,“di”*‘=;1 giicfisf tinierfeiingt Sig” 6° the selected pay channel to exemplary channel 6 in his
`na s, etc.
`oor tr-ansmissxon c arac ens 1cs are no ac-
`own receiver tuner for vjcwin _
`Cetlled EGPPHY 5)’ homc 135513 in ‘he 5355 ‘ff free 01‘ mm‘
`This selection also applies agcontrol signal to the meter
`Inerfiial t6l6Vi50iI1 'P1‘0gl‘31'l'15i and there W111 Pmbflbly 53
`apparatus attached to the outside of his residence to marl:
`CV61?!
`Ifl01“¢ Obifictlfifls when 316 PFOBF3-ms 9'1"? Paid f0"- 70 a charge card for subsequent billing. The meter ap-
`This being the case, there is much to be said for providing
`paratus, which includes a charge card, is controlled from
`the main station by a signal carrier to advance the charge PMC Exhlbll
`a pay television system which is reliable and which pro-
`Apple v.
`lPR2016-
`P
`
`50
`
`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 5
`
`

`
`3,211,330
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`3
`card for each program change so that unique individual
`marks are made each time a pay program is selected. The
`system briefly described above has a number of novel
`features.
`One feature relates to means for previewing the pay
`television material prior to selecting -a program. This per-
`mits future programs to be advertised, charges for each
`program to be indicated, etc.
`Another feature of the invention perta-ins to the means
`for recycling the system to the preview channel after the
`end of any pay program which has been selected by a sub-
`scriber for viewing so that, upon the next viewing, the
`subscriber can again obtain information on the forth-
`coming programs, charges and the l-ike.
`Yet -another feature of the invention pertains to means
`for permitting a subscriber to freely switch between a
`selected fee -program and commercial or free television
`programs without incurring an additional charge. As long
`as the fee program is still in progress, the subscriber can
`swi-tch back and forth between -it and a free channel with-
`out-any cost or other additional difliculties.
`Yet another feature of the invention pertains to separ-
`ately locating the meter and charge apparatus exterior to
`-‘the subscriber's home so that service men need not gain
`entry to the house to periodically collect billing cards.
`Still another feature of the invent-ion pertains to means
`for preventing accidental operation of a fee channel by
`requiring a sequence of switches to be actuated.
`In order
`to view a fee channel program, it is first necessary to
`switch the receiver-converter circuit to a fee position and
`thereafter select a fee channel. This particular feature
`substantially avoids the possibility of children or other
`persons accidentally marking the charge card for pro-
`grams that are not wanted.
`Yet another feature of the invention pertains to the
`means for converting the picture and sound car-riers for
`the preview or fee channels to an available open channel
`of the tuner of the subscriber's receiver so -as to utilize
`existing equipment and minimize -additional electronic
`components.
`Still another feature of the invention pertains to the
`use of a control signal generator at the main station for
`controlling the meter and charge apparatus as well as
`resetting the receiver—converter unit to the preview chan-
`nel upon the expiration of a fee program that has been
`selected for viewing.
`The present pay television system provides a straight-
`forward and simple answer to the competitive demands
`of a wired system, yet provides the conveniences and
`economies which make the service superior to non-wire
`systems. The receiver—converter of the present system
`provides a simple and efficient means for permitting se-
`lection by a subscriber of one of a number of preview and
`-fee channels transmitted to the subscriber‘s home over a
`single cable. By placing the -meter and charge apparatus
`on the outside of the subsor-ibcr’s home and requiring only
`a simple attachment of the receiver-converter unit on
`the back of the subscriber’s receiver, i-t makes it possible
`to service the apparatus with a minimum of inconvenience.
`Furthermore, the particular means by which the meter
`and charge apparatus is synchronized to record the pro-
`grams selected by a subscriber during the course of a
`month or other billing period eliminates the inconvenience
`and complexity of the coin demand systems.
`While the present system is described in connection
`with a preferred embodiment, it should be apparent that
`variations may be envisioned by those skilled in the art
`without departing from the spirit and scope of the inven-
`tion. The claim alone should limit the breadth of the
`invention, though it is worthwhile to note here that while
`the exemplary system has -a preview channel and two fee
`channels -at the main station,
`it could be expanded to
`provide additional fee channels if desirable and/or neces-
`sary in a. given situation. Further, while the receiver-
`converter unit -in the present system illustratively con-
`verts the preview and fee channel carriers to the band- 75
`
`40
`
`55
`
`60
`
`B5
`
`i‘0
`
`.n
`
`4
`width of channel 6 (82.0—88.0 .mc.), variations in the re-
`ceiver-converter circuits can be provided to convert the
`channels to -any other channel in the VHF or UHF spec-
`trum.
`These and other obiects, advantages and features of the
`present invention will be more apparent when the fol-
`lowing detailed description is read with reference to the
`drawings, in which:
`FIG. 1 is a block diagram showing the component parts
`of the -pay television system forming the present -invention;
`FIGS. 2 and 3 when horizontally -alined provide a
`schematic diagram of the receiver-converter which is illus-
`trated by block diagram in FIG. 1;
`FIG. 4 is a schematic diagram of the signal generator
`which is illustrated by block diagram in FIG. 1; and
`FIG. 5 is a plan view of a charge card for the meter
`and charge apparatus of FIG. I.
`The pay television system constituting the present in-
`vention includes apparatus located at a main station and
`at the subscriber’s home which are connected by a coaxial
`cable. More particularly, the -main station includes a pre-
`view transmitter 21, a No. 1 fee channel transmitter 22. a
`No. 2 ice transmitter 23, a control unit 24, a control
`signal generator 25, and individual RF amplifiers 25, 27
`and 28 for the respective transmitters 2.1, 22 and 23. The
`preview channel, pay channels 1 and 2, and t-ransmitters
`21, 22 and 23 are connected through their respective RF
`amplifiers 26, 27 and 23 to the input of coaxial cable 29.
`The coaxial cable 29 is commonly connected in homes to
`the -input of the receivervconver-ters 30 which in turn co-
`operates with individual meter and charging apparatus 31.
`In the exemplary embodiment of the main station ap-
`paratus herein described, the preview transmitter 21 cc-
`cupies a bandwidth between 9.5 and 16.0 Inc. with a pic-
`ture carrier of 14.75 me. and a sound carrier of 10.25
`mc.; pay channel 1 transmitter occupies a bandwidth be-
`tween 24.75 and 31.25 me. with a picture carrier of 30.0
`me. and a sound carrier of 25.5 mc.; and pay channel 2
`transmitter is transmitted in a band width between 33.25
`and 39.75 me. with -a picture carrier 38.5 me. and a sound
`carrier of 34.0 me. These particular bandwidths are
`chosen to avoid interference with the -intermediate fre-
`quency carriers in the 21-25 me. and 41-45 mc. range.
`Further, the selection of the particular picture and sound
`carriers accord with the vestigal side band transmission
`that is standard for commercial or free telecasting trans-
`mission. The picture and sound carriers are cornmoned
`to the input of the cable 29 through their respective R-F
`amplifiers. These isolate and amplify the signals of the
`transmitters.
`In addition to the particular exempl-arily employed fre-
`quency bands there is provided a 9.25 me. unmodulated
`carrier cont-rol signal. This is also connected to the input
`of cable 29.
`It should be apparent that other frequency
`handwidl.-hs might have been selected for transmitters 21,
`22 and 23 and that -a different frequency might be chosen
`for the signal generator 25. These particular combina-
`tions have worked well in practice and seem to provide
`sufficient separation to minimize -interference with the
`subscriber's television circuits and with each other. Of
`course, harmonic interference with the commercial RF
`carriers is no problem since the cable can be properly
`shielded from external energy.
`The 9.25 me. control carrier along with the picture and
`sound carriers for the programs broadcast by transmitters
`21. 22 and 23 are transmitted by way of a cable 29 to
`the input of the receiver-converter 30. The receiver-
`convertcr 30 functionally includes a switching circuit 41,
`a band pass RF amplifier 42, a converter or mixer circuit
`43, a local oscillator circuit 44, a series of tuned circuits
`45, an IF transformer 46, a band pass filter 4'7, first and
`second signal amplifiers 48 and 49, a trigger amplifier 51,
`a control relay 52, and a power supply (not shown) for
`the various filaments, B4‘ and relay control switching
`signals.
`The picture and sound carriers for each channel and the
`
`PMC Exhibit
`
`Apple v.
`|PR2016-
`P
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`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 6
`
`

`
`3,211,330
`
`6
`5
`charge card 69 to indicate that the subscriber has selected
`signal carrier are connected by way of cable 29 to the
`pay channel 2.
`common input of band pass RF amplifier 42 and band
`pass filter 47. Depending upon the connections in switch-
`Before describing the way in which the meter apparatus
`ing circuit 41, as determined by subscriber’s setting, the
`31 is controlled from the main station and the way in
`5 which the rccciver—converter circuit 30 is reset to the
`picture and sound carriers transmitted by one of the three
`preview channel following a pay program selection, it is
`transmitters 21-23 is applied to the input of mixer 43 and
`necessary to briefly understand the working of meter ap-
`an appropriate oscillator frequency, provided by local
`paratus 31. Meter 3] includes a circular platen 67 rotat-
`oscillator 44, beats the picture and sound carrier of the
`ably supported by a ratchet mechanism 75. The platen
`selected channel. The output of mixer 43 in all cases is
`a hand between 82.0-88.0 rnc. corresponding to commor- 30 is designed to be advanced 2.8125 degrees upon each actu-
`cial channel 6. Within these limits, the picture carrier
`ation of a stepping relay 68. Thus 128 unit steps for a
`applied to the input of IF transformer 46 is 33.25 inc.
`platen 67 constitute a complete revolution of 360 degrees.
`and the sound carrier is 87.75 me. The output winding
`Supported on the platen 67 is a charge card 69 which is
`of transformer 46 is applied through a portion of switch~
`illustrated in more detail in FIG. 5. As can be observed
`ing circuit 41 (which is designated 41a in FIG. 1) to the 15 there, the card 69 is angularly divided into 128 segments.
`subscriber’s receiver identified as 56.
`The segments are marked off around two circular arcs at
`The selection of program is determined by the initial
`different
`radii, 69:1, 695,
`the innermost
`lying directly
`closure of one of the four switches 61, 62, 63 or 64 of
`beneath the plunger of solenoid 71 which is associated
`the switching circuit 41.
`Switch 64 is a two position
`with channel 1 and the other directly beneath the plunger
`switch which will remain in one or the other position 20 of solenoid 72 which is associated with pay channel 2.
`whereas 61, 62 and 63 are push button switches.
`If a
`Whenever one or the other of solenoids 71 and 72 is actu-
`subscriber desires to monitor commercial channels, switch
`ated,
`its plunger descends and perforatcs the card along
`64 is operated to the FREE side to connect a source of
`the associated circle 69:: or 691) to record the fact that a
`power 65 to the switching circuit 41. This causes the
`selection has been made for that pay channel.
`switching circuit 41:‘: to connect antenna 60 directly to the 25
`The stepping switch 68 is operated by control relay 52
`TV receiver 56 so that the receiver tuner in a conventional
`which in turn is actuated by the presence of a 9.25 rnc.
`manner may receive a commercial channel picture and
`control signal from signal generator 25. The latter is
`sound carriers and reproduce the program on the receiver
`applied by way of cable 29 to the input of band pass
`tube. On the other hand, if the subscriber desires to con-
`nmplilier :32 and band pass filter 47. As long as the syn-
`sider fee programs, the switch 64 is changed to the FEB 30 chronizing signal from signal generator 25 is applied by
`position. Additionally, if preview channel is to be moni-
`way of cable 29 to the receiver-converter 30, the stepping
`tored to see what is being offered, etc., switch 61 is closed
`relay 60 continues to operate and release thereby moving
`temporarily which causes the switching circuit 41 to con-
`the platen 67 one unit of approximately 2.8 degrees for
`nect appropriate tuned circuits of 45 into the RF bandpass
`each operation. Band pass filter 47 passes the 9.25 mo.
`amplifier 42, local oscillator 44 and mixer 43 circuits as 35 signal that appears on cable 29 and attenuates the picture
`well as to disconnect the antenna 60 from the receiver 56.
`and sound carric1‘s also commoned over the cable. The
`With the picture and sound carrier frequencies em-
`9.25 mc. signal passes through first and second signal am-
`ployed for the preview program channel, this selection
`plificrs 48 and 49 and trigger amplifier 51. The output
`causes switching circuit 41 to switch a filter network into
`of trigger amplifier 51 completes a circuit for control
`the amplifier 42 which will pass only the hand between 49 relay 52 causing it to operate.
`It will remain operated
`9.5—16.0 me.
`It also selects a tank circuit for local oscii-
`until the control signal is removed from cable 29.
`later 44 to provide a 98.0 me. frequency. This in com-
`As long as control relay 52 is operated, a source of
`bination with the output f1'om amplifier 42 is applied
`power 65 is applied by way of its front contact 1 and lead
`to mixer 43 to provide the output picture and sound car-
`66 to the armature of stepping relay 68. This completes
`riers for commercial channel 6. This output is thereafter, 45 a circuit for relay 68 through a back contact 1 thereof
`as noted above, applied to IF transformer 46 and through
`_ which is broken each time the relay armature 74 closes.
`switching circuit 41:: to the receiver 56.
`The armature 74 in closing rotates ratchet 75 to step the
`the subscriber
`If after viewing the preview channel,
`platen 67 and the indexed card 69 one angular unit. Con-
`desires to watch pay channel 1, he temporarily closes
`trol relay 52 in operating also applies ground by way of
`switch 62 which causes switching circuit 41 to change the 50 its front contact 2 and lead 76 to the switching circuit 41
`tuned circuits 45 associated with amplifier 42, mixer 43,
`for resetting the receiver-converter 30 to the preview posi-
`and local oscillator 44. The changes are designed to per—
`tion if it had previously been on either channel 1 or 2 as
`mit band pass RF amplifier 42 to pass only the band
`will be explained in more detail below.
`between 24.75-31.25 mo. (channel 1) and to change the
`The meter and charging apparatus 31 is only exem-
`local oscillator frequency to 113.25 me. so that the output 55 plarily illustrated in FIG. 1 although the format of the
`from the mixer 43 will still coincide with commercial
`charge card is shown in detail
`in FIG.5. For under-
`channel 6. This having been done, pay channel 1
`is ap-
`standing of the present system application of this is deemed
`plied through switching circuit 41:: to channel 6 of re-
`sufficient, however an application filed on an even date
`ceiver 56 and tuned in just as a commercial channel would
`herewith (S.N. 106,800, filed May 1, 1961} discloses and
`be tuned.
`In addition to switching the tuned circuits 45. 00 claims the meter apparatus.
`It is suggested that this co-
`the switching circuit 41 applies a marking pulse by way
`pending application be considered for more details of
`of lead 78 to a solenoid 71 associated with the meter and
`construction of the meter 31.
`charging apparatus 31. Solenoid 71 in operating provides
`The foregoing description of the main station and
`a mark on a charge card 69 as illustrated in FIG. 5 indi-
`subscriber station equipment makes it apparent that the
`eating the selection of channel 1 by the subscriber.
`65 subscriber station equipment meets the basic requirements
`In a similar fashion, if the subscriber had selected chan-
`of a good pay television system, and in fact is the only one
`nel 2 by closing switch 63, switching circuit 41 controls
`known to date which does so. The rnulti-channel infor-
`tuned circuits 45 to switch the band pass filter for ampli-
`mation is supplied to the re-ceiver—converter by way of a
`liar 42 to one between 33.25-39.75 me. and change the
`cable where, depending upon the subscriber's wishes, one
`beat frequency to 121.75 me. The result is that the out- 70 of the three channels or the free or commercial channels
`put of mixer 43 will again be the picture and sound
`can be selected and connected to the subscriher’s regular
`carriers corresponding to commercial channel 6 to which
`receiver for viewing. Means are provided to simply and
`the TV 56 is tuned. The switching circuit 41 provides
`effectively switch the receiver-converter to monitor one
`a signal over lead 79 which is applied to a second solenoid
`of the two pay channels and marl: a card, the relative
`72 -in the meter apparatus 31 to cause it to punch the 75 position of which is synchronized with control means atPlVlC Exhibit
`Apple v.
`|PR2016-
`P
`
`PMC Exhibit 2105
`Apple v. PMC
`IPR2016-00755
`Page 7
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`3,211,830
`
`?
`the main station so billing may be subsequently deter-
`mined. The system otters maximum security inasmuch
`as it uses a separate cable connected to each subscriber's
`home.
`It permits the recording of the programs pur-
`chased. Multiple pricing and payment therefor is a sim-
`ple matter. The system also provides multiple channels
`for program material; there are no internal connections to
`the customer’s TV set, an important consideration in any
`practical system}; it passes NARB standards and color
`programs without difficulty; it is small in size, pleasing
`in appearance and economical
`in cost and installation;
`and, finally, the pricing and billing information is avail-
`able for service personnel outside the subscriber's home,
`which minimizes the inconvenience and irritations accom-
`panying even wired systems that have coin demand boxes
`attached to the subscriber's receiver.
`While the overall operation of the system is illustrated
`in FIG. 1, FIGS. 2 and 3 when arranged in side by side
`position illustrate the circuitry of the receiver-converter
`in detail and FIG. 4 is a schematic diagram of the signal
`carrier oscillator circuit.
`Before considering the receiver-converter circuit in de-
`tail, consider the signal generator 25 (FIG. 4). The gen-
`erator 25 includes a cathode tuned oscillator tube 81,
`cathode follower output tube 82, a source of B+ 65 and
`the various associated circuit components. Closure of
`switch 83 causes the generator 25 to generate a 9.25 mc.
`unmodulated carrier.
`It is amplified and connected to
`the cable 29 as shown. Control of the meter 31, etc.,
`is effected by operation of the switch 83.
`The receiver-converter circuit 30 as illustrated in com-
`bined FIGS. 2 and 3 and more particularly the switching
`circuit 41 thereof includes a stepping relay or switch 101
`that comprises a relay coil 102 and nine multi-position
`wafer sections 103a—103r'. the four switches 61454 and
`slow release relays I04, 105, 106 and 107, which are re-
`spectively associated with the selector switches 61-64.
`The wafers 103a—103:' are associated with various parts
`of the receiver-converter 30 in order to provide the nec-
`essary switching functions for resetting channels 1 and 2
`to the preview channels after the termination of a sub-
`scription program which the subscriber has viewed
`(103.5), visually indicating the channel in use at any one
`time {103c), establishing a closed path for B4‘
`to the
`local oscillator 44 only after a switch has been actuated
`(l03d}, switching the antenna and pay television chan-
`nels as provided by auxiliary switching circuit 41:: in the
`FIG. 1 block diagram (103e and 103i), and switching the
`proper tuned circuits into cooperative relationship with
`the mixer 43, the local oscillator 44 and the band pass RF
`amplifier 42 {103g—i).
`Before considering precisely how the stepping relay 101
`controls the various components of the receiver-converter
`30, it is well to understand the means by which it is caused
`to step in response to the actuation of one of the selectors
`61-64. Looking to the lower part of FIG. 2, it will he
`observed that a source of 33+ 65 is connected to the arma-
`ture of switch 64 {free channel selector) and one Contact
`is connected to a line commoned to one terminal of push
`button switches 61-63 while the other contact is con-
`nected to the high side of the coil of relay 107. The
`common line of these switches 61-63 is connected to the
`high side of their respective relays 104, 105 and 106.
`It
`will also be observed that armatures of each relay 104,
`105, 106 and 107 are commonod through a lead 109 to
`back contact 1 associated with stepping relay coil 102.
`Inasmuch as front contacts 2 of all four relays 104-107
`are connected to ground, every time any one of the four
`relays is operated, a path is closed from ground by way
`of lead 109 through back contact 1 of stepping switch
`101 and the coil 102 to a source of 13+ 65. This causes
`stepping switch 101 to operate which in turn advances
`the armatures or wipers associated with wafer switches
`103a-103:" one terminal each time it operates. Because
`the circuit is closed through back Contact 1 of stepping
`
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`the stepping switch buzzes. The circuit
`relay 101,
`broken each time the relay operates. Once the circuit
`path for the stepping switch 101 is closed,
`it will con-
`tinue to operate and release until the position correspond-
`ing to the actuated switch is reached by the wafer arma-
`tures. This is determined by wafer segment 103.2. A
`lock up path over front contact 1 of relay 104 and lead
`111 connected to terminal 1 of wafer 103;: is provided;
`a lock up path over front contact 1 of relay 105 and lead
`112 to terminal 3 of switch wafer 103:: is provided; a lock
`up path over front contact 106 and lead 113 to terminal
`5 of wafer 103:: is provided; and a lock up path over
`front contact 1 of relay 107 and lead 114 connected to
`tenninat '7 of water Iitsn is provided. A source of power
`65 is cornmoned through terminals 8, 9 and 10 of water
`163a to apply power through the armature or wiper of
`water 103:: as long as the armature contacts the ring of
`the wafer. However, when the armature steps to the
`position exemplarlly indicated in FIG. 2, the path to bat-
`tery 65 is interrupted and, when selector switch 61 is also
`open, causes relay 104 to slowly release.
`In a similar
`fashion, relays 105, 106 and 107 have hold paths asso-
`ciated with their respective terminals 3, 5 and 7 of the
`wafer 103:: which paths are closed until
`the armature
`moves out of contact with the instant terminal on wafer
`103:: which corresponds to the channel selected by the
`operation of switch 61, 62, 63 or 64.
`The stepping relay 101 upon the actuation of one of
`the four selector switches 61, 62, 63 or 64, which switches
`correspond to the preview, pay channel I, pay channel 2,
`and free channels, respectively, rotates the armaturcs of
`wafer sections 103n—103i to the terminal positions corre-
`sponding to the selected channel.
`In the case of the pre-
`view channel, the armatures of switch wafers 103:2-103:’
`step to terminals 1. For pay channels 1, 2 and the free
`channel, the terminal positions are 3. 5 and 7, respec-
`tively. Thesc four terminal positions on the wafers are
`consistent through all nine wafer sections and hence act
`to permit setting the entire receiver-converter circuit 30
`in accordance with the subscriber’s programming wishes.
`Wafer section 103.’) permits pay channels 1 and 2 to be
`reset to the preview channel by cornmoning, over lead
`117, terminals 3 and 5 of that wafer to the high side of
`relay 104, which is associated with the preview channel.
`Whenever the armature of wafer section 103!) contacts
`terminals 3 or 5, battery 65 is connected by way of lead
`117 to the front contact 2 of the trigger relay 52. Oper-
`ation of relay 52 completes a circuit for relay 104 in the
`preview channel. This