US3790932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual braking warning device for land vehicles
Assignee: Shakespeare and Company
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Filing: 1972-06-30
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Granted: 1974-02-05
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Expires: 1992-06-30
Abstract
Abstract A visual braking warning system for land vehicles, particularly snowmobiles and the like, includes an electrical signal generating means which produces a signal that varies in accordance with the speed of an engine driving the vehicle, measuring means arranged to measure and control the signal from the signal generating means, and means arranged to provide a visual warning to following vehicles when the engine speed is shown by the measuring means to have fallen below a predetermined speed.
Inventors
- 👤 J Ridpath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:16
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44; B60Q1/444
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
188 words
A visual warning system for engine driven land vehicles, comprising electrical signal generating means to produce a signal which varies in magnitude in accordance with the speed of the engine driving the vehicle, a control circuit receiving said signal from said generating means, a signaling circuit receiving said signal from said generating means and continually providing an output signal, a signaling device capable of providing a visual warning to following vehicles, and means for actuating said signaling device, said control circuit including transistor means capable of conductive and non-conductive states and receiving said signal from said generating means, and means to selectively control the point at which said transistor means conducts dependent on the magnitude of said signal from said generating means, said means for actuating said signaling device being inoperative during said non-conductive state of said transistor means and receiving said output signal of said signaling circuit during said conductive state of said transistor means so that said warning signal is actuated when the engine speed falls below a predetermined speed as set by said means to selectively control the point at which said transistor means conducts.
Claim 2
Dependent Claim
188 words
A visual warning system for engine driven land vehicles, comprising electrical signal generating means to produce a signal which varies in magnitude in accordance with the speed of the engine driving the vehicle, a control circuit receiving said signal from said generating means, a signaling circuit receiving said signal from said generating means and continually providing an output signal, a signaling device capable of providing a visual warning to following vehicles, and means for actuating said signaling device, said control circuit including transistor means capable of conductive and non-conductive states and receiving said signal from said generating means, and means to selectively control the point at which said transistor means conducts dependent on the magnitude of said signal from said generating means, said means for actuating said signaling device being inoperative during said non-conductive state of said transistor means and receiving said output signal of said signaling circuit during said conductive state of said transistor means so that said warning signal is actuated when the engine speed falls below a predetermined speed as set by said means to selectively control the point at which said transistor means conducts.
Claim 3
Dependent Claim
21 words
A warning system in claim 1, wherein the electrical signal generating means is a rotary electrical generator driven by the engine.
Claim 4
Dependent Claim
33 words
A warning system as in claim 1, wherein the engine is a spark ignition Internal combustion engine and the electrical signal generating means is associated with a spark ignition system for the engine.
Claim 5
Dependent Claim
38 words
A warning system as in claim 1, wherein the said visual warning is in the form of a flashing light, and said signaling circuit is a flasher unit is arranged continuously to alternate between ''''on'''' and ''''off'''' states.
Claim 6
Dependent Claim
22 words
A visual warning system as in claim 4, wherein the electrical signal generating means is a rotary generator driven by said engine.
Claim 7
Dependent Claim
18 words
A visual warning system as in claim 5, wherein said flasher unit is a solid state multivibrator circuit.
Claim 8
Dependent Claim
14 words
A visual warning system as in claim 1, wherein the vehicle is a snowmobile.
Claim 9
Dependent Claim
26 words
A visual warning system as in claim 1, wherein said means to selectively control the point at which said transistor means conducts includes a variable resistor.
Claim 10
Dependent Claim
20 words
A visual warning system as in claim 4, wherein said means for actuating said signaling device includes a power transistor.
Claim 11
Dependent Claim
15 words
A visual warning system as in claim 5 wherein said signaling device includes a lamp.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |