Patent US3593272A successfully refreshed from Google Patents.
US3593272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for automatically sensing and indicating a decrease in the acceleration of a vehicle
Assignee: Individual
•
Filing: 1968-09-30
•
Granted: 1971-07-13
•
Expires: 1988-09-30
Abstract
Abstract Apparatus for the determination of a reduction in acceleration of a vehicle in which an electromechanical sensing device generates an output signal in response to the rotation of a shaft turning at a fixed ratio to the vehicle drive shaft. Electronic circuitry processes the signal of the sensing device for controlling the operation of a light signal when a given level of reduction in acceleration is exceeded. The indicating system is integrated with the conventional vehicle light signals.
Inventors
- 👤 Robert W Blomenkamp
- 👤 Enrique J Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:57
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; B60Q1/444
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A system for automatically sensing and indicating a decrease in acceleration of a vehicle, comprising: first means for obtaining a signal representative of the acceleration of said vehicle; second means for differentiating said acceleration signal with respect to time to provide an acceleration decrease signal; and indicator; and third means responsive to said decrease signal for actuating said indicator only when said decrease signal has a magnitude greater than a predetermined threshold magnitude.
Claim 2
Independent Claim
73 words
A system for automatically sensing and indicating a decrease in acceleration of a vehicle, comprising: first means for obtaining a signal representative of the acceleration of said vehicle; second means for differentiating said acceleration signal with respect to time to provide an acceleration decrease signal; and indicator; and third means responsive to said decrease signal for actuating said indicator only when said decrease signal has a magnitude greater than a predetermined threshold magnitude.
Claim 3
Dependent Claim
25 words
A system according to claim 1 wherein said first means include means for generating a vehicle speed signal; and means for differentiating said speed signal.
Claim 4
Dependent Claim
57 words
A system according to claim 2 wherein said speed signal is derived from the angular velocity of a shaft rotatable in correlation with the wheels of said vehicle, and further including switching means controlled by the rotation of said shaft for transmitting said speed signal to said system only when said wheels are operating in forward drive.
Claim 5
Dependent Claim
85 words
A system according to claim 3 including a sleeve surrounding said shaft and rotatable in frictional drag relationship therewith, said switching means being closed by partial rotation of said sleeve in one sense for transmitting said speed signal when said whEels are operating in forward drive; means biasing said sleeve in said closed position whereby said switching means is opened, and transmission of said speed signal interrupted, only upon rotation of said shaft in the opposite sense when said wheels are operating in reverse drive.
Claim 6
Dependent Claim
42 words
A system according to claim 1 wherein said second means comprises an RC circuit in which said decrease signal is obtained at a resistor connected in shunt with a diode arranged with a polarity for blocking signals increasing in magnitude with time.
Claim 7
Dependent Claim
22 words
A system according to claim 1 wherein said indicator presents a visual indication external of said vehicle to drivers following said vehicle.
Claim 8
Dependent Claim
46 words
A system according to claim 2 wherein said means for differentiating said speed signal comprises an RC circuit in which the differentiated signal is developed across a resistor connected in shut with a diode arranged with a polarity for blocking signals decreasing in magnitude with time.
References Cited (Backward Citations)
US2980369A
Cited
US3364384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |