Patent US3660693A successfully refreshed from Google Patents.
US3660693A
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Analog tens and units timer with source synchronization
Assignee: MRT ACQUISITION Corp A DELAWARE CORP
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Filing: 1970-10-01
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Granted: 1972-05-02
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Expires: 1990-10-01
Abstract
Abstract A timing system for use in conjunction with a welding system, wherein the timing system consisting of separate tens and units counters, the counters being electronically controlled to select the tens counter prior to the selection of the units counter. A system is provided for generating synchronizing pulses and a bistable circuit, in the form of a flip flop, is utilized to switch from the tens counter to the units counter upon completion of the tens count.
Inventors
- 👤 James F Markey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:24
CPC Classifications
H; H03; H03K; H03K25/00; H03K17/00; H03K17/28
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
An analog, line synchronized timing system for timing preselected periods of time for a plurality of events including a source of pulsating voltage, the system comprising first and second aNalog timers interconnected to sequentially time units and tens portion and subsequently selecting said units portion, and circuit means for synchronizing the completion of the units count with a characteristic of the source voltage.
Claim 2
Dependent Claim
63 words
An analog, line synchronized timing system for timing preselected periods of time for a plurality of events including a source of pulsating voltage, the system comprising first and second aNalog timers interconnected to sequentially time units and tens portion and subsequently selecting said units portion, and circuit means for synchronizing the completion of the units count with a characteristic of the source voltage.
Claim 3
Dependent Claim
15 words
The system of claim 1 wherein said pulsating voltage is a sinusoidal, alternating current signal.
Claim 4
Dependent Claim
22 words
The system of claim 1 wherein said synchronizing circuit means includes pulse generating circuit means connected to said source of pulsating voltage.
Claim 5
Dependent Claim
32 words
The system of claim 3 wherein said pulse generating means generates an output spike pulse in response to the sensing of substantially the start of a half wave of said pulsating source.
Claim 6
Dependent Claim
45 words
The system of claim 4 wherein the units counter includes a controllable semiconductor output device and a timing circuit, the timing circuit means and the synchronizing circuit providing output signals which coincide at a point in time to signal the completion of the units count.
Claim 7
Dependent Claim
22 words
The system of claim 5 wherein said units analog timer provides an increasing timing voltage in response to the passage of time.
Claim 8
Dependent Claim
33 words
The system of claim 6 wherein said controllable device has at least two electrodes, said units timer being connected to one electrode and said synchronizing circuit means being connected to the other electrode.
Claim 9
Dependent Claim
28 words
The system of claim 7 wherein said controllable device achieves a conductive state when the relative voltage between the said at least two electrodes achieves a preselected relation.
Claim 10
Dependent Claim
31 words
The system of claim 8 wherein said relationship of voltages occurs at the preselected units time and at the characteristic of the source of voltage occurring after the preselected units time.
Claim 11
Dependent Claim
37 words
The system of claim 9 wherein said pulse generating means includes a square wave generator for squaring the pulsating voltage, and a pulse generator which generates the spike pulse at the leading edge of the square wave.
Claim 12
Dependent Claim
23 words
The system of claim 10 wherein said pulse generating circuit includes amplitude adjustment means for selectively adjusting the amplitude of the spike pulse.
Claim 13
Dependent Claim
16 words
The system of claim 11 wherein said amplitude adjustment adjusts the response of said controllable device.
Claim 14
Dependent Claim
13 words
The system of claim 12 wherein said controllable device is a unijunction transistor.
Claim 15
Dependent Claim
14 words
The system of claim 13 wherein said controllable device is a programmable unijunction transistor.
Claim 16
Independent Claim
59 words
A method of timing preselected periods of time for a plurality of events from a source of pulsating voltage, the method including the steps of timing units and tens portions of each period by selecting said tens portion and subsequently selecting said units portion, and synchronizing the completion of a units count with the characteristic of a source voltage.
Claim 17
Independent Claim
59 words
A method of timing preselected periods of time for a plurality of events from a source of pulsating voltage, the method including the steps of timing units and tens portions of each period by selecting said tens portion and subsequently selecting said units portion, and synchronizing the completion of a units count with the characteristic of a source voltage.
Claim 18
Dependent Claim
32 words
The method of claim 15 further including the step of generating an output spike pulse in response to the sensing of substantially the start of a half wave of the pulsating source.
Claim 19
Dependent Claim
33 words
The method of claim 16 wherein the completion of the preselected units count generates a completion pulse, the method further including the step of correlating the completion signal with the output spike pulse.
Claim 20
Dependent Claim
31 words
The method of claim 17 further including the step of generating a final output pulse at the coincidence of the completion pulse and the pulse spike occuring after the completion pulse.
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |