Patent US1836199A successfully refreshed from Google Patents.
Patent US3723658A successfully refreshed from Google Patents.
US3723658A
Expired / Lapsed
US
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Extendable multiplexer
Assignee: DDI Communications Inc
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Filing: 1971-06-30
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Granted: 1973-03-27
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Expires: 1991-06-30
Abstract
Abstract A multiplexer is disclosed including a transmitter system and a receiver system wherein each has a plurality of modules. The modules are aligned and held in a guide channel and electrically and physically interconnected by plug and socket interconnections. Each system has a main module and at least one extender module which may be interconnected at the plugs and sockets for physical and electrical extension of the entire multiplexer as desired. An end terminator electrically terminates the sequential scan of the input terminals in the development of the time multiplexed signals, and another end terminator electrically terminates the transmitter system in the receiver system in its distribution of the multiplexed signals to output terminals thereon. The variable number of extenders permit an expandable ring in which the input terminals may be scanned and to which the output terminals the time division multiplexed signals may be distributed. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
Inventors
- 👤 W Huebner
- 👤 R Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:41
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/10; H04J3/04; H04J3/047
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
145 words
A multiplexer comprising, in combination, a transmitter system and a receiver system; said transmitter system having a plurality of input terminals thereon, output means on said transmitter system, multiplexing circuits within said transmitter system to transmit to said output means the electrical condition at said input terminals thereon, said receiver system including input means for receiving multiplexed information from said output means of said transmitter system, said receiver system having output means, multiplexing decoder circuits within said receiver system to receive and decode the signals and supply same to said receiver system output means to indicate the electrical condition of the input terminals on said transmitter system, one of said systems including a main module and at least one extender module, and connection means including complementary plug and receptacle means to electrically and physically connect in sequence one module directly with the next adjacent module.
Claim 2
Dependent Claim
145 words
A multiplexer comprising, in combination, a transmitter system and a receiver system; said transmitter system having a plurality of input terminals thereon, output means on said transmitter system, multiplexing circuits within said transmitter system to transmit to said output means the electrical condition at said input terminals thereon, said receiver system including input means for receiving multiplexed information from said output means of said transmitter system, said receiver system having output means, multiplexing decoder circuits within said receiver system to receive and decode the signals and supply same to said receiver system output means to indicate the electrical condition of the input terminals on said transmitter system, one of said systems including a main module and at least one extender module, and connection means including complementary plug and receptacle means to electrically and physically connect in sequence one module directly with the next adjacent module.
Claim 3
Dependent Claim
42 words
A multiplexer as set forth in claim 1, wherein each of said systems includes a main module and at least one extender module, anD connection means including complementary plug and receptacle means to electrically and physically connect said modules in said sequence.
Claim 4
Dependent Claim
18 words
A multiplexer as set forth in claim 1, wherein said plug and receptacle means are multiple conductor devices.
Claim 5
Dependent Claim
73 words
A multiplexer as set forth in claim 1, wherein said transmitter system and said receiver system each has a plurality of modules with exposed faces accessible from the front thereof, said transmitter system input terminals including a plurality of pairs of input terminals on the exposed face of said transmitter modules, and said receiver system output means including a plurality of pairs of output terminals on the exposed face of said receiver modules.
Claim 6
Dependent Claim
37 words
A multiplexer as set forth in claim 1, including a power supply module for each said transmitter system and said receiver system and interconnected in the respective transmitter and receiver system by said plug and receptacle means.
Claim 7
Dependent Claim
66 words
A multiplexer as set forth in claim 1, including at least one module in each system and having an exposed face, a pair of transmission line terminals on said exposed face of said module in said transmitter system as said output means thereof, and a pair of transmission line terminals on said exposed face of said module in said receiver system as said input means thereof.
Claim 8
Dependent Claim
45 words
A multiplexer as set forth in claim 1, including an end terminator having internal electronic components and a complementary plug or receptacle means selectively connectable on the end one of the sequence of modules to electrically terminate the modules in transmitting or receiving multiplexed information.
Claim 9
Dependent Claim
58 words
A multiplexer as set forth in claim 1, including means to scan said input terminals as part of said transmitter multiplexing circuits, an end terminator having internal electronic components and a complementary plug or receptacle means selectively connectable on the end one of the sequence of said transmitter modules to electrically terminate the scan of said input terminals.
Claim 10
Dependent Claim
55 words
A multiplexer as set forth in claim 1, wherein said multiplexing decoder circuits include means to sequentially supply the multiplexed signal to said receiver output means, and an end terminator having complementary plug or receptacle means selectably connectable on the end one of the sequence of receiver modules to electrically terminate the received multiplexed signals.
Claim 11
Dependent Claim
39 words
A multiplexer as set forth in claim 1, wherein said physical connection means includes channel means receiving said modules, and guide means in said channel means aligned parallel to the electrical connection means in said plug and receptacle means.
Claim 12
Dependent Claim
27 words
A multiplexer as set forth in claim 10, wherein said channel guide means includes complementary tongue and groove means on said channel means and on said modules.
Claim 13
Dependent Claim
37 words
A multiplexer as set forth in claim 10, including said channel having two legs and a U-shape in cross-section, and at least one of said legs being resilient to aid in insertion and removal of said modules.
Claim 14
Dependent Claim
24 words
A multiplexer as set forth in claim 1, wherein said physical connection means includes a channel receiving said modules in an integrated sequence therein.
Claim 15
Dependent Claim
24 words
A multiplexer as set forth in claim 13, wherein said channel aligns said modules to permit interconnection of said complementary plug and receptacle means.
Claim 16
Dependent Claim
43 words
A multiplexer as set forth in claim 13, including said channel having legs in a U-shape, inturned feet on said legs of said channel and a groove on said modules receivable in said inturned feet to laterally retain said modules in said channel.
Claim 17
Dependent Claim
141 words
A multiplexer, comprising in combination, a transmitter system and a receiver system, transmission means between said transmitter and receiver systems to transmit multiplexed signals, said transmitter system including, encoder means having a main encoder with a first plurality of pairs of input terminals with an open or closed condition, AT least one encoder extender in said encoder means having a second plurality of pairs of input terminals, means to sequentially scan said pairs of input terminals in said main encoder, gate means connected to said encoder means and gated upon completion of scan of said input terminals of said main encoder to initiate the scan of said input terminals in the next adjacent encoder extender, and means connecting said encoder means to supply to said transmission means the sequentially scanned information of the open or closed condition of said input terminals.
Claim 18
Dependent Claim
141 words
A multiplexer, comprising in combination, a transmitter system and a receiver system, transmission means between said transmitter and receiver systems to transmit multiplexed signals, said transmitter system including, encoder means having a main encoder with a first plurality of pairs of input terminals with an open or closed condition, AT least one encoder extender in said encoder means having a second plurality of pairs of input terminals, means to sequentially scan said pairs of input terminals in said main encoder, gate means connected to said encoder means and gated upon completion of scan of said input terminals of said main encoder to initiate the scan of said input terminals in the next adjacent encoder extender, and means connecting said encoder means to supply to said transmission means the sequentially scanned information of the open or closed condition of said input terminals.
Claim 19
Dependent Claim
35 words
A multiplexer as set forth in claim 16, including an end terminator connected to the terminal one of said encoder extenders to terminate the scan of the pairs of input terminals in said encoder extender.
Claim 20
Dependent Claim
40 words
A multiplexer as set forth in claim 16, including an end terminator connected to the terminal one of said encoder extenders to terminate the scan and reinitiate the sequential scan of the pairs of input terminals in said main encoder.
Claim 21
Dependent Claim
23 words
A multiplexer as set forth in claim 16, including line-driver means connecting said encoder means to supply scanned information to said transmission means.
Claim 22
Dependent Claim
43 words
A multiplexer as set forth in claim 16, wherein said sequential scan means includes means developing a scanning frequency, and means to connect said scanning frequency means to said encoder means to sequentially scan said pairs of input terminals in said main encoder.
Claim 23
Dependent Claim
33 words
A multiplexer as set forth in claim 20, wherein said scanning frequency developing means includes an oscillator of a high frequency, and divider means dividing said oscillator frequency to a slower scanning frequency.
Claim 24
Dependent Claim
42 words
A multiplexer as set forth in claim 20, wherein said scanning frequency developing means includes an oscillator of a high frequency, divider means dividing said oscillator frequency to a slower scanning frequency, and a natural binary counter connected to said divider means.
Claim 25
Dependent Claim
95 words
A multiplexer as set forth in claim 16, including at least two encoder extenders, first and second gate means, said gate means having an AND gate function gating the respective encoder extender, said first gate being gated upon completion of scan of the input terminals of said main encoder to initiate the scan of said input terminals in the adjacent encoder extender, and said second gate being gated upon completion of scan of said input terminals of said adjacent encoder extender to initiate the scan of said input terminals in the next adjacent encoder extender.
Claim 26
Dependent Claim
123 words
A multiplexer, comprising in combination, a transmitter system and a receiver system, transmission means between said transmitter and receiver systems to transmit multiplexed signals, said receiver system including, decoder means having a main decoder with a first plurality of pairs of output terminals, means connecting said transmission means to said decoder means to decode and distribute said multiplexed signal to said pairs of output terminals in said main decoder, at least one decoder extender in said decoder means having a second plurality of pairs of output terminals, and gate means connected to said decoder means and gated upon completion of distribution to said output terminals of said main decoder to initiate the distribution to said output terminals in said next adjacent decoder extender.
Claim 27
Dependent Claim
123 words
A multiplexer, comprising in combination, a transmitter system and a receiver system, transmission means between said transmitter and receiver systems to transmit multiplexed signals, said receiver system including, decoder means having a main decoder with a first plurality of pairs of output terminals, means connecting said transmission means to said decoder means to decode and distribute said multiplexed signal to said pairs of output terminals in said main decoder, at least one decoder extender in said decoder means having a second plurality of pairs of output terminals, and gate means connected to said decoder means and gated upon completion of distribution to said output terminals of said main decoder to initiate the distribution to said output terminals in said next adjacent decoder extender.
Claim 28
Dependent Claim
35 words
A multiplexer as set forth in claim 24, including an end terminator connected to the terminal one of said decoder extenders to terminate the distribution to the pairs of output terminals in said decoder extender.
Claim 29
Dependent Claim
38 words
A multiplexer as set forth in claim 24, including an end terminator connected to the terminal one of said decoder extenders to terminate and reinitiate the sequential distribution to the pairs of output terminals in said main decoder.
Claim 30
Dependent Claim
89 words
A multiplexer as set forth in claim 24, including first and second gates in said gate means, at least two decoder extenDers in said decoder means, said first gate being gated upon completion of distribution to the output terminals of said main decoder to initiate the distribution to said output terminals in the adjacent decoder extender, and said second gate being gated upon completion of distribution to said output terminals of said adjacent decoder extender to initiate the distribution to said output terminals in the next adjacent decoder extender.
Claim 31
Dependent Claim
71 words
A multiplexer as set forth in claim 24, including a temporary memory storage in said decoder means, said decoder means applying said decoded signals in sequence to said memory storage, checking means to check the authenticity of the received signals and to emit a check signal, and means connecting said check signal to activate said memory storage to transfer the stored information to the respective output terminals of said receiver system.
Claim 32
Dependent Claim
116 words
A multiplexer as set forth in claim 24, including a temporary memory storage in said decoder means, said temporary memory storage having storage devices equal in number to the number of pulses in a message train received by said receiver system, each memory storage device having master-slave sections, said decoder means applying said decoded signals in sequence to the master section of the storage devices, checking means to check the authenticity of the received signals and to emit a check signal, and means connecting said check signal to activate said memory storage to transfer the stored information from the master section to the slave section and thus to the respective output terminals of said receiver system.
Claim 33
Dependent Claim
34 words
A multiplexer as set forth in claim 24, including external termination means on each of said slave units to provide a visual or aural indication of the condition of the respective multiplexed signal bit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |