US3725906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-timing code keyer
Assignee: Singer Co
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Filing: 1970-09-24
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Granted: 1973-04-03
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Expires: 1990-09-24
Abstract
Abstract This is an automatic code keyer which can be used, for example, for automatically generating in Morse code the call letters of a radio transmitter. The keyer of this invention is simpler and has fewer parts than prior art devices. It comprises a plurality of selection circuits which activate individual dot or dash circuits. In each case where a dot is selected, a short pulse is generated, and if a dash is selected, a long pulse is generated. The generation of a pulse opens a gate which permits a tone to be transmitted to the output for a duration of the pulse. The selection devices are manually controlled and are operated to select the appropriate dot or dash for each element of a desired letter. If neither is selected, the pulse is applied to the next line of selection devices which control the original pulse generators and gating circuits. The system may be expanded to provide for the automatic generation of any number of letters.
Inventors
- 👤 G Quick
- 👤 G Sowter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
Apparatus for automatically generating a prescribed coded message in which the message comprises a plurality of characters and in which each character is formed of a combination of long and short duration pulses, said apparatus comprising a group of individual element generators each adapted to generate a long duration pulse and a short duration pulse upon input energization, means for connecting the output of one element generator to the input of the next adjacent element generator so that the output of one element generator energizes the next element generator to provide self-sequencing of said apparatus, controlling means including a plurality of settable means arranged in rows and columns, each column of settable means being connected to one of said element generators to determine when said element generator passes pulses of long duration and when it passes pulses of short duration, each row of said settable means representing a separate character, and means for automatically stepping the operation of said settable means from one row to another.
Claim 2
Dependent Claim
166 words
Apparatus for automatically generating a prescribed coded message in which the message comprises a plurality of characters and in which each character is formed of a combination of long and short duration pulses, said apparatus comprising a group of individual element generators each adapted to generate a long duration pulse and a short duration pulse upon input energization, means for connecting the output of one element generator to the input of the next adjacent element generator so that the output of one element generator energizes the next element generator to provide self-sequencing of said apparatus, controlling means including a plurality of settable means arranged in rows and columns, each column of settable means being connected to one of said element generators to determine when said element generator passes pulses of long duration and when it passes pulses of short duration, each row of said settable means representing a separate character, and means for automatically stepping the operation of said settable means from one row to another.
Claim 3
Dependent Claim
61 words
The apparatus defined in claim 1 further including a source of electrical signals, a utilization device, gating means connecting said source to said device, and means for applying the output of each element generator to said gating means so that said gating means opens to pass signals from said source to said device whenever an element generator generates an output pulse.
Claim 4
Dependent Claim
54 words
The apparatus defined in claim 1 further including delay means equal to a specified delay between pulses interposed between the output of one element generator and the input to the next element generator so that the activation of one element generator is delayed after the occurrence of an output from the previous element generator.
Claim 5
Dependent Claim
65 words
The apparatus defined in claim 1 further including a first gate having an input connected to the output of said means for generating a long pulse, a second gate having an input connected to the output of said means for generating a short pulse and means for connecting the outputs of said first and second gates together to form the output of the element generator.
Claim 6
Dependent Claim
106 words
The apparatus defined in claim 4 wherein each of said settable means comprises a simple switch having a movable contact and three stationary contacts, means for connecting the movable contact of each switch to one output of said stepping means, means for connecting a first stationary contact to a second input of said first gate, and means for connecting a second stationary contact to a second input of said second gate so that the setting of said stepping means selects the switches which are energized and the setting of the movable contacts of the selected switches selects which of said first and second gates is opened.
Claim 7
Dependent Claim
80 words
The apparatus defined in claim 5 wherein said automatic stepping means comprises a counter having a stepping input and a plurality of count outputs, said means for connecting the movable contacts to outputs of said stepping means including means for connecting the movable contacts of all of the switches in each row of switches together and to one of the count outputs of said counter so that as said counter counts the apparatus is stepped from one character to another.
Claim 8
Dependent Claim
105 words
The apparatus defined in claim 6 further including means for stepping said counter, said counter stepping means comprising a third gate for each element generator, means for applying the output of said delay between element generators to one input of said third gate, means for connecting the third stationary contact of each switch in a column to the second input of said third gate, a character delay equal to a prescribed time period between characters, means for connecting the outputs from said third gates to the input of said character delay and the output of said character delay to the stepping input of said counter.
Claim 9
Dependent Claim
95 words
The apparatus defined in claim 7 further including a message delay having a delay time corresponding to a prescribed time period between messages, a single fourth gate, means for connecting the output of said fourth gate to the input of said message delay and the output of said message delay to the input to said first element generator, means for connecting one input of said fourth gate to the last count output of said counter, and means for connecting a second input of said fourth gate to the third contacts of all of said switches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |