Patent US3674941A successfully refreshed from Google Patents.
US3674941A
Expired / Lapsed
US
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Call-number monitors for telephones
Assignee: Individual
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Filing: 1970-06-01
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Granted: 1972-07-04
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Expires: 1990-06-01
Abstract
Abstract A monitor for sensing and displaying a call-number transmitted from a telephone when a telephone number is dialled, comprises an electrical impulse generator for sensing electrical impulses transmitted from the telephone when a number is dialled, and transmitting an amplified train of impulses to a monostable vibrator. The monostable vibrator in turn emits a pulse to a digit counter having a plurality of spaces. A logic circuit is provided including a plurality of gate means each having first inputs electrically connected to the output of the electrical impulse generator and second inputs each connected respectively to an output of a different stage of the digit counter. A plurality of totalizing counters are each electrically connected to the output of a gate means for totalizing the inputs transmitted from the gate means and the output of each totalizing counter is connected to display means.
Inventors
- 👤 Guy Claude Guetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:58
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/56
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
237 words
A monitor for sensing and displaying a call-number transmitted from a telephone when a telephone number is dialled, the monitor comprising means for sensing electrical impulses transmitted from the telephone when a number is dialled, the sensing means amplifying the impulse sensed for each digit dialled, means electrically connected to the output of the sensing means for emitting a pulse on receipt of the train of impulses from the sensing means, a digit counter including a plurality of stages, the digit counter being electrically connected to the output of the pulse emitting means, a logic circuit including a plurality of gate means having first and second inputs, the first inputs of all of said gate means being electrically connected to the output of the sensing means and the second inputs of each gate means being connected respectively to an output of a different stage of the digit counter, a plurality of totalizing counters each electrically connected to the output of a respective one of said gate means for totalizing the impulses transmitted from the gate means and electronic display means electrically connected to the outputs of the totalizing counters, said pulse emitting means being a monostable multivibrator which is activated by the first impulse of each train emitted by said electrical impulse generator and which emits a pulse of a duration at least equal to the duration of the train of impulses from said electrical impulse generator.
Claim 2
Dependent Claim
237 words
A monitor for sensing and displaying a call-number transmitted from a telephone when a telephone number is dialled, the monitor comprising means for sensing electrical impulses transmitted from the telephone when a number is dialled, the sensing means amplifying the impulse sensed for each digit dialled, means electrically connected to the output of the sensing means for emitting a pulse on receipt of the train of impulses from the sensing means, a digit counter including a plurality of stages, the digit counter being electrically connected to the output of the pulse emitting means, a logic circuit including a plurality of gate means having first and second inputs, the first inputs of all of said gate means being electrically connected to the output of the sensing means and the second inputs of each gate means being connected respectively to an output of a different stage of the digit counter, a plurality of totalizing counters each electrically connected to the output of a respective one of said gate means for totalizing the impulses transmitted from the gate means and electronic display means electrically connected to the outputs of the totalizing counters, said pulse emitting means being a monostable multivibrator which is activated by the first impulse of each train emitted by said electrical impulse generator and which emits a pulse of a duration at least equal to the duration of the train of impulses from said electrical impulse generator.
Claim 3
Dependent Claim
59 words
A monitor according to claim 1, wherein the sensing means is an electrical impulse generator which senses the electrical impulses transmitted from the telephone when a number is dialled, amplifies the impulses and transmits a train of amplified impulses, the number of impulses of which is equal to the impulses transmitted from the telephone, to the pulse emitting means.
Claim 4
Dependent Claim
33 words
A monitor according to claim 1, wherein said display means includes a display panel including a plurality of electronic numerical display tubes each of which is connected to a respective said totalizing counter.
Claim 5
Dependent Claim
16 words
A monitor according to claim 3, in which the display panel forms part of the telephone.
Claim 6
Dependent Claim
22 words
A monitor according to claim 1, wherein a zero setting device is connected to the digit counter and to each totalizing counter.
Claim 7
Dependent Claim
44 words
A monitor according to claim 2, wherein the impulse generator includes a collector comprising a winding positioned adjacent a wire from the telephone, to which an impulse is emitted during the dialling of a number, the winding and wire forming together a current transformer.
Claim 8
Dependent Claim
86 words
A monitor according to claim 6, wherein the impulse generator includes an amplifier having an input connected to the collector and an output connected to a diode for eliminating the alterations in polarity predetermined by the output impulses of the amplifier and to the input of the pulse emitting means, the duration of activity of which pulse emitting means is greater than the time interval separating two impulses emitted by the amplifier in response to the opening and closing of the transmission circuit of the call-number.
Claim 9
Dependent Claim
29 words
A monitor according to claim 1, wherein a printing means if connected to the outputs of the totalizing counters in order to print numbers called, on a paper tape.
Claim 10
Dependent Claim
47 words
A monitor according to claim 8, wherein the printing means includes a timepiece connected to the telephone in such a way, that the time of a telephone call is printed on the paper tape as soon as the handpiece of the telephone is lifted off its cradle.
Claim 11
Dependent Claim
43 words
A monitor according to claim 8, wherein the printing means comprises a zero resetting input connected to the telephone in such a way, that the said printing means is reset to zero when a handpiece of the telephone is lifted off its cradle.
Claim 12
Dependent Claim
43 words
A monitor according to claim 8, wherein the printing means comprises a selector connected to several telephone extensions in such a way, that the number of an internal calling extension is printed as soon as the telephone handpiece is lifted off its cradle.
Claim 13
Dependent Claim
211 words
A monitor for sensing and displaying a call-number transmitted from a telephone when a telephone number is dialled, the monitor comprising an electrical impulse generator for sensing electrical impulses transmitted from the telephone when a number is dialled, the electrical impulse generator amplifying the impulses sensed and transmitting a train of amplified impulses, the number of impulses of which is equal to the pulses transmitted from the telephone, a monostable vibrator electrically connected to the output of the electrical impulse generator for emitting a pulse, the duration of which pulse, is at least equal to the duration of the train of impulses received from the electrical impulse generator, a digit counter electrically connected to the output of the monostable vibrator, the digit having a plurality of stages, a logic circuit including a plurality of gate means each having first and second inputs, the first inputs being electrically connected to the output of the electrical impulse generator, and the second inputs of each gate means being connected respectively to an output of a different stage of the digit counter, a plurality of totalizing counters each electrically connected to the output of a gate means for totalizing the impulses transmitted from the gate means and display means electrically connected to the totalizing counters.
Claim 14
Dependent Claim
211 words
A monitor for sensing and displaying a call-number transmitted from a telephone when a telephone number is dialled, the monitor comprising an electrical impulse generator for sensing electrical impulses transmitted from the telephone when a number is dialled, the electrical impulse generator amplifying the impulses sensed and transmitting a train of amplified impulses, the number of impulses of which is equal to the pulses transmitted from the telephone, a monostable vibrator electrically connected to the output of the electrical impulse generator for emitting a pulse, the duration of which pulse, is at least equal to the duration of the train of impulses received from the electrical impulse generator, a digit counter electrically connected to the output of the monostable vibrator, the digit having a plurality of stages, a logic circuit including a plurality of gate means each having first and second inputs, the first inputs being electrically connected to the output of the electrical impulse generator, and the second inputs of each gate means being connected respectively to an output of a different stage of the digit counter, a plurality of totalizing counters each electrically connected to the output of a gate means for totalizing the impulses transmitted from the gate means and display means electrically connected to the totalizing counters.
Claim 15
Dependent Claim
41 words
A monitor according to claim 7, wherein said impulse generator further includes a monostable multivibrator having an input connected to the output of said amplifier and an output connected to the input of said monostable multivibrator of said pulse emitting means.
Claim 16
Dependent Claim
63 words
A monitor according to claim 1, wherein said digit counter comprises a binary code counter having an input connected to said pulse emitting means and having four outputs coded for ''''1,'''' '''' 2,'''' '''' 4'''' and ''''8'''' and a decoder having inputs connected to the outputs of said binary code counter and 10 outputs connected respectively with inputs of ten said gate means.
Claim 17
Dependent Claim
74 words
A monitor according to claim 14, wherein there are 12 said gate means and wherein said digit counter further comprises a bistable flip-flop having an input connected to the ''''8'''' output of said binary code counter and two outputs, and four gates having inputs connected with outputs of said flip-flop and outputs connected respectively to four of said gate means to control the transmission of signals from said decoder to said four gate means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |