US3856982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone dialing arrangement
Assignee: STC PLC
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Filing: 1973-04-26
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Granted: 1974-12-24
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Expires: 1993-04-26
Abstract
Abstract This push-buttom unit replaces the dial of a telephone instrument, and the push-button operation enters ''''dialled'''' digits into an MOS circuit whose outputs operate relays. One of these relays repeats the digits to line in conventional impulse train form, while the other deals with ''''off normal'''' dial functions. The electronics is line powered.
Inventors
- 👤 A Lawson
- 👤 C Tabalba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:45
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/31; H04M1/312
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
212 words
An outpulsing-unit for a telephone subscriber''s instrument of the type having a push-button unit, which includes an electronic store into which the digits corresponding to the push-buttons operated by the subscriber are entered in the same order as that in which the push-buttons are operated, pulse generation means adapted to generate pulses at the rate and of the characteristics acceptable by an exchange to which the instrument is connected, distribution means for transferring the digits in said store one after the other to a control counter, means under control of said counter to pass an impulse train from said pulse generation means for each digit transferred thereto, the number of impulses in each said train corresponding to the digital value of the digit in said counter, a connection to an impulsing means over which each said impulse train drives said means so that each said impulse train is repeated to the line to the exchange, connections from said circuit elements to the line so that the outpulsing unit is powered from the exchange, and a capacitor connected to the line and to the outpulsing unit, which capacitor is charged from the line while the latter is looped and by its chaRge maintains the power supply to the outpulsing unit during break impulses.
Claim 2
Dependent Claim
212 words
An outpulsing-unit for a telephone subscriber''s instrument of the type having a push-button unit, which includes an electronic store into which the digits corresponding to the push-buttons operated by the subscriber are entered in the same order as that in which the push-buttons are operated, pulse generation means adapted to generate pulses at the rate and of the characteristics acceptable by an exchange to which the instrument is connected, distribution means for transferring the digits in said store one after the other to a control counter, means under control of said counter to pass an impulse train from said pulse generation means for each digit transferred thereto, the number of impulses in each said train corresponding to the digital value of the digit in said counter, a connection to an impulsing means over which each said impulse train drives said means so that each said impulse train is repeated to the line to the exchange, connections from said circuit elements to the line so that the outpulsing unit is powered from the exchange, and a capacitor connected to the line and to the outpulsing unit, which capacitor is charged from the line while the latter is looped and by its chaRge maintains the power supply to the outpulsing unit during break impulses.
Claim 3
Dependent Claim
92 words
The outpulsing unit as claimed in claim 1 wherein the lifting of the handset closes a hook-switch to connect the unit to the line, wherein on the first push-button operation a common contact operable in response to the operation of any one of said buttons closes to connect the line to said capacitor and to the circuit elements of the unit, and wherein in response to said connection a first relay operates to close a contact to connect the line to said capacitor at said circuit elements independent of said common contact.
Claim 4
Dependent Claim
60 words
The outpulsing unit as claimed in claim 1 wherein said impulsing means is a latching relay which is set to its operated state at the commencement of each break impulse and is reset to its non-operated state at the end of each break impulse, and wherein when the impulsing relay is in its operated state its contacts break the loop.
Claim 5
Dependent Claim
71 words
The outpulsing unit as claimed in claim 1 wherein digits are entered into the store in an n-bit parallel code each bit of which is a 1 or a 0 bit, and wherein said electronic store consists of n shift registers in parallel into which the digits are entered, each said shift register having m stages where m is the maximum number of digits to be catered for in a number.
Claim 6
Dependent Claim
39 words
The outpulsing unit as claimed in claim 1 wherein the unit is connected to the line in series with the telephone portion of the subscriber''s set, and wherein charging of the capacitor commences immediately the subscriber lifts the handset.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |