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US3909780A
Expired / Lapsed
US
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Low-velocity warning device
Assignee: Individual
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Filing: 1969-09-02
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Granted: 1975-09-30
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Expires: 1989-09-02
Abstract
Abstract A low-velocity warning device and circuit therefor for a vehicle. The device is normally inactivated above a predetermined velocity but becoming activated during deceleration at a velocity below the pre-determined velocity thereby signaling others of the deceleration. The device comprises a light source, a photoelectric cell responsive thereto, and a velocityresponsive means capable of interrupting light from the light source and one or a multiple of warning lamps. The warning lamps are the turn signal lights normally present on a vehicle and a means is provided whereby activation of the turn signals by the turn-signal lever automatically inactivates the warning device.
Inventors
- 👤 Bobbie Dale Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:09
CPC Classifications
G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/11; B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
213 words
An automatic warning device for a vehicle equipped with a warning signal means for warning that said vehicle is stopped, or is in reverse motion or is in motion at a velocity below a selected velocity, comprising a. a rigidly mounted speedometer responsive to said velocity and having a radially-movable pointer having a mask thereon in the same plane as that of said pointer adapted to mask a light source, said pointer projecting an arc as it moves radially responsive to said velocity of said vehicle, b. a light source pivotably-mounted behind said speedometer and adjustable along an arc generally concentric with said arc projected by said masking pointer and maskable by said masking pointer, c. a photoelectric cell concentrically and pivotably mounted forward of said speedometer, parallel to and responsive to and activated by said light source, and radially adjustable along said arc, said photoelectric cell being connected with a relay adapted to closing a circuit to and activating said warning signal means when said photoelectric cell is activated by said light source, and opening said circuit when said masking pointer moves in front of said light source at said selected velocity, thereby interrupting light from said light source whereby said photoelectric Cell is inactivated, and thereby inactivating said warning signal means.
Claim 2
Dependent Claim
213 words
An automatic warning device for a vehicle equipped with a warning signal means for warning that said vehicle is stopped, or is in reverse motion or is in motion at a velocity below a selected velocity, comprising a. a rigidly mounted speedometer responsive to said velocity and having a radially-movable pointer having a mask thereon in the same plane as that of said pointer adapted to mask a light source, said pointer projecting an arc as it moves radially responsive to said velocity of said vehicle, b. a light source pivotably-mounted behind said speedometer and adjustable along an arc generally concentric with said arc projected by said masking pointer and maskable by said masking pointer, c. a photoelectric cell concentrically and pivotably mounted forward of said speedometer, parallel to and responsive to and activated by said light source, and radially adjustable along said arc, said photoelectric cell being connected with a relay adapted to closing a circuit to and activating said warning signal means when said photoelectric cell is activated by said light source, and opening said circuit when said masking pointer moves in front of said light source at said selected velocity, thereby interrupting light from said light source whereby said photoelectric Cell is inactivated, and thereby inactivating said warning signal means.
Claim 3
Dependent Claim
31 words
The velocity detecting means of claim 1 wherein a pointer-stop projects forwardly from said light source, said stop being adapted to prevent said pointer from moving radially beyond said light source.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |