US3601794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle acceleration and deceleration sensing and indicating system utilizing an ac input signal
Assignee: Individual
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Filing: 1968-09-30
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Granted: 1971-08-24
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Expires: 1988-09-30
Abstract
Abstract Apparatus for the determination of acceleration, deceleration and reduction in acceleration of a vehicle in which an electromechanical sensing device generates an AC signal having a frequency which varies in accordance with the angular velocity of a shaft turning at a fixed ratio to the vehicle drive shaft. Electronic circuitry processes the signal of the sensing device for continuously monitoring of acceleration and deceleration on a meter, and for operating light signals indicating levels of acceleration, deceleration and reduction in acceleration in a system that is integrated with conventional vehicle light signals.
Inventors
- 👤 Robert W Blomenkamp
- 👤 Enrique J Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:58
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; B60Q1/444; G; G01; G01P; G01P13/00; G01P13/02; G01P13/04; G01P13/045; G01P15/00; G01P15/16; G01P15/165
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A system for automatically sensing and indicating at least one level of acceleration or deceleration of a vehicle, comprising: means for generating a first AC or pulse signal of a frequency which varies in accordance with the speed of said vehicle; first delay means for delaying said first signal by a first fixed period of time to obtain a second signal representative of said first signal but always delayed by said first fixed period of time; and first differentiator means for instantaneously comparing said second signal to said first signal on the basis of frequency for obtaining a third signal representative of the first derivative of the speed of said vehicle with respect to time.
Claim 2
Independent Claim
115 words
A system for automatically sensing and indicating at least one level of acceleration or deceleration of a vehicle, comprising: means for generating a first AC or pulse signal of a frequency which varies in accordance with the speed of said vehicle; first delay means for delaying said first signal by a first fixed period of time to obtain a second signal representative of said first signal but always delayed by said first fixed period of time; and first differentiator means for instantaneously comparing said second signal to said first signal on the basis of frequency for obtaining a third signal representative of the first derivative of the speed of said vehicle with respect to time.
Claim 3
Dependent Claim
132 words
A system according to claim 1, for additionally sensing and indicating a change in said first derivative of the speed of said vehicle with respect to time, wherein said third signal is an AC or pulse signal of a frequency which varies in accordance with the first time derivative of the speed of the vehicle, and further including: second delay means for delaying said third signal by a second fixed period of time to obtain a fourth signal representative of said third signal but always delayed by said second fixed period of time; and second differentiator means for instantaneously comparing said fourth signal to said third signal on the basis of frequency for obtaining a fifth signal representative of the second derivative of the speed of said vehicle with respect to time.
Claim 4
Dependent Claim
46 words
A system according to claim 1, including an indicator, and level sensing and switching means responsive to said third signal for activating said indicator when said first time derivative corresponds to a level of deceleration equal or greater in magnitude than a threshold level of deceleration.
Claim 5
Dependent Claim
139 words
A system according to claim 1, including discriminator means responsive to said third signal; first polarity control means responsive to said discriminator means; at least first and second indicators and at least first and second level sensing and switching means, said first level sensing and switching means actuating said first indicator when said third signal as modified by said discriminator means is of a given polarity representative of either acceleration or deceleration and exceeds a first threshold magnitude corresponding to a first threshold level of said acceleration or deceleration, and said second level sensing and switching means actuating said second indicator when said third modified signal is of said same given polarity and exceeds a second threshold magnitude, greater than said first threshold magnitude in absolute value, corresponding to a second threshold level of said acceleration or deceleration, respectively.
Claim 6
Dependent Claim
89 words
A system according to claim 2, including: second polarity control means responsive to said third signal for permitting said third signal to be applied to said second delay means and second differentiator means only when the frequency of said third signal increases with time, corresponding to accelEration of said vehicle; an indicator; third polarity control means; and level sensing and switching means for actuating said last-named indicator only when said fifth signal is negative and exceeds, in absolute value, a threshold magnitude corresponding to a threshold decrease in acceleration.
Claim 7
Dependent Claim
56 words
A system according to claim 5 wherein said second polarity control means comprises: a diode switch interposed between said first differentiator means, and said second delay means and second differentiator means; and diode means responsive to said third signal for turning on said diode switch when said third signal corresponds to an acceleration of said vehicle.
Claim 8
Dependent Claim
102 words
A system according to claim 4 wherein each of said level sensing and switching means includes a polarity sensitive threshold amplifier, and a silicon controlled rectifier (SCR), said SCR being interposed between an AC power source and the respective indicators which are actuated by turn-on signals from each of said level sensing and switching means, each of said turn-on signals being applied to the gates of the respective SCR''s when the threshold level of acceleration or deceleration for each of said indicators is reached, to thereby permit said respective indicators to be energized by said AC power source through said respective SCR''s.
Claim 9
Dependent Claim
83 words
A system according to claim 5 wherein said level sensing and switching means includes a threshold amplifier, and a silicon controlled rectifier (SCR) interposed between an AC power source and said indicator which is actuated by a turn-on signal from said level sensing and switching means, said turn-on signal being applied to the gate of said SCR when a threshold level of decrease in acceleration is reached, to thereby permit said indicator to be energized by said AC power source through said SCR.
Claim 10
Dependent Claim
41 words
A system according to claim 1, further including means responsive to said third signal for providing a visual indication corresponding to the magnitude of said third signal for the direct and continuous monitoring of the acceleration or deceleration of said vehicle.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |