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Patent US3727124A successfully refreshed from Google Patents.
US3727124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed controlled timing light
Assignee: International Business Machines Corp
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Filing: 1970-04-30
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Granted: 1973-04-10
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Expires: 1990-04-30
Abstract
Abstract A control circuit for an internal combustion engine timing light includes an integrating circuit for producing a voltage inversely proportional to engine speed and a delay circuit which is activated by the firing of the last cylinder of the engine to initiate a time delay pulse varying in amount of delay as a function of engine speed in response to the voltage. The delay circuit has an output coupled through a falling edge detector which produces an output at the end of the time delay to actuate the timing light.
Inventors
- 👤 H Kahen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:51
CPC Classifications
F; F02; F02P; F02P17/00; F02P17/02; F02P17/04; F02P17/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
Apparatus for controlling a timing radiation source for an internal combustion engine for producing a signal for triggering said source in timed relationship with a high voltage distributor output pulse comprising: a timing radiation source, variable time delay means having a speed input for receiving an input signal indicative of engine speed and a synchronization input for receiving a timing input signal, said variable time delay means providing an output signal following said synchronization input by a time interval varying as a function of a signal received at said speed input, output means for coupling said output signal to said timing radiation source coupled to said delay means, internal combustion engine electrical contact points operable in synchronism with said engine, signal means for generating a signal dependent upon a pulse rate having a speed indicating output coupled to said speed input of said delay means, means for coupling said points to said signal means for prOviding pulses as a function of engine speed. said synchronization input being coupled to a said high voltage output of said distributor.
Claim 2
Dependent Claim
177 words
Apparatus for controlling a timing radiation source for an internal combustion engine for producing a signal for triggering said source in timed relationship with a high voltage distributor output pulse comprising: a timing radiation source, variable time delay means having a speed input for receiving an input signal indicative of engine speed and a synchronization input for receiving a timing input signal, said variable time delay means providing an output signal following said synchronization input by a time interval varying as a function of a signal received at said speed input, output means for coupling said output signal to said timing radiation source coupled to said delay means, internal combustion engine electrical contact points operable in synchronism with said engine, signal means for generating a signal dependent upon a pulse rate having a speed indicating output coupled to said speed input of said delay means, means for coupling said points to said signal means for prOviding pulses as a function of engine speed. said synchronization input being coupled to a said high voltage output of said distributor.
Claim 3
Dependent Claim
62 words
Apparatus in accordance with claim 1 including internal combustion engine electrical contact points operable in synchronism with said engine, signal means for generating a signal dependent upon a pulse rate having a speed indicating output coupled to said speed input of said delay means, means for coupling said points to said signal means for providing pulses as a function of engine speed.
Claim 4
Dependent Claim
20 words
Apparatus in accordance with claim 1 wherein said output means comprises means for detecting the trailing edge of a pulse.
Claim 5
Dependent Claim
24 words
Apparatus in accordance with claim 3 wherein said means for detecting includes an output circuit coupled to the triggering input of said timing light.
Claim 6
Dependent Claim
46 words
Apparatus in accordance with claim 4 wherein said timing light includes a potentiometer connected to an input of said delay means for adjusting the delay provided by said means to advance or retard said trailing edge relative to high voltage pulses coupled to said synchronization input.
Claim 7
Dependent Claim
196 words
Apparatus for controlling a timing radiation source for an internal combustion engine for producing a signal for triggering said source in timed relationship with a high voltage distributor output pulse comprising: a timing radiation source, variable time delay means having a speed input for receiving an input signal indicative of engine speed and a synchronization input for receiving a timing input signal, said variable time delay means providing an output signal following said synchronization input by a time interval varying as a function of a signal received at said speed input, output means for coupling said output signal to said timing radiation source coupled to said delay means an internal combustion engine high voltage distributor having a high voltage input and a plurality of high voltage outputs, said synchronization input being coupled to a said high voltage output of said distributor, internal combustion engine electrical contact points operable in synchronism with said engine, signal means for generating a signal dependent upon a pulse rate having a speed indicating output coupled to said speed input of said delay means, means for coupling said points to said signal means for providing pulses as a function of engine speed.
Claim 8
Dependent Claim
196 words
Apparatus for controlling a timing radiation source for an internal combustion engine for producing a signal for triggering said source in timed relationship with a high voltage distributor output pulse comprising: a timing radiation source, variable time delay means having a speed input for receiving an input signal indicative of engine speed and a synchronization input for receiving a timing input signal, said variable time delay means providing an output signal following said synchronization input by a time interval varying as a function of a signal received at said speed input, output means for coupling said output signal to said timing radiation source coupled to said delay means an internal combustion engine high voltage distributor having a high voltage input and a plurality of high voltage outputs, said synchronization input being coupled to a said high voltage output of said distributor, internal combustion engine electrical contact points operable in synchronism with said engine, signal means for generating a signal dependent upon a pulse rate having a speed indicating output coupled to said speed input of said delay means, means for coupling said points to said signal means for providing pulses as a function of engine speed.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |