US4592001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed gauging indicator
Assignee: AUSTIN LINDSAY E TEXAS CITY TX
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Filing: 1983-07-22
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Granted: 1986-05-27
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Expires: 2003-07-22
Abstract
Abstract The time elapsed between passing landmark posts observed from a moving vehicle, is measured by manually controlled start and stop of a timing cycle, and such time measurement is utilized to perform a velocity calculation based on selection of a memory stored data relating to distances between uniformly spaced types of landmark posts. The time measurements as well as the velocity calculations are exhibited on a digital display.
Inventors
- 👤 Virginia D. Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:51
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/64; G01P3/66
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
For use in determining the speed of an observer from a vehicle moving along a path, along which landmarks of different types are respectively spaced from each other by predetermined uniform distances, a time and velocity indicating device comprising timer means for measuring time of movement of the said vehicle between said landmarks, means connected to the said timer means for calculating velocity of the said vehicle from the measured time and said distances, and visual display means connected to the said timer means and the said velocity calculating means for alternative readout of the measured time and the calculated velocity, the improvement including memory means connected to the velocity calculating means for storing data related to a plurality of said predetermined uniform distances, and distance selector means connected to the memory means for selecting said stored data to control operation of the velocity calculating means in accordance with the type of landmarks observed by the observer.
Claim 2
Dependent Claim
157 words
For use in determining the speed of an observer from a vehicle moving along a path, along which landmarks of different types are respectively spaced from each other by predetermined uniform distances, a time and velocity indicating device comprising timer means for measuring time of movement of the said vehicle between said landmarks, means connected to the said timer means for calculating velocity of the said vehicle from the measured time and said distances, and visual display means connected to the said timer means and the said velocity calculating means for alternative readout of the measured time and the calculated velocity, the improvement including memory means connected to the velocity calculating means for storing data related to a plurality of said predetermined uniform distances, and distance selector means connected to the memory means for selecting said stored data to control operation of the velocity calculating means in accordance with the type of landmarks observed by the observer.
Claim 3
Dependent Claim
59 words
The improvement as defined in claim 1 wherein said timer means includes manual entry means for initiating and terminating timing cycles of measured duration corresponding to successive observance of two of the landmarks from the moving vehicle, and means responsive to said initiation and termination of the timing cycles for respectively enabling and disabling the said distance selector means.
Claim 4
Dependent Claim
36 words
The improvement as defined in claim 2 wherein said distance selector means comprises a manually actuated switch having at least two operative positions respectively corresponding to the predetermined uniform distances of one mile and 300 feet.
Claim 5
Dependent Claim
15 words
The improvement as defined in claim 3 wherein the moving vehicle is a railroad car.
Claim 6
Dependent Claim
36 words
The improvement as defined in claim 1 wherein said distance selector means comprises a manually actuated switch having at least two operative positions respectively corresponding to the predetermined uniform distances of one mile and 300 feet.
Claim 7
Dependent Claim
143 words
In a speed indicating device having timer means for measuring time elapsed between observance of landmarks from a vehicle moving along a predetermined path, means for calculating velocity of the said vehicle and visual display means for readout of vehicle speed from the said velocity calculating means, the improvement including memory means for storing data related to a plurality of uniform distances between said landmarks, distance selector means connected to the said memory means for selecting said stored data to control operation of the said velocity calculating means in accordance with the landmarks observed, manual entry means connected to the said timer means for initiating and terminating timing cycles of measured duration corresponding to said elapsed time between the observed landmarks, and means responsive to said initiation and termination of the said timing cycles for respectively enabling and disabling the distance selector means.
Claim 8
Dependent Claim
143 words
In a speed indicating device having timer means for measuring time elapsed between observance of landmarks from a vehicle moving along a predetermined path, means for calculating velocity of the said vehicle and visual display means for readout of vehicle speed from the said velocity calculating means, the improvement including memory means for storing data related to a plurality of uniform distances between said landmarks, distance selector means connected to the said memory means for selecting said stored data to control operation of the said velocity calculating means in accordance with the landmarks observed, manual entry means connected to the said timer means for initiating and terminating timing cycles of measured duration corresponding to said elapsed time between the observed landmarks, and means responsive to said initiation and termination of the said timing cycles for respectively enabling and disabling the distance selector means.
Claim 9
Dependent Claim
17 words
The improvement as defined in claim 6 wherein said landmarks are established by posts of different types.
Claim 10
Dependent Claim
34 words
The improvement as defined in claim 7 wherein said posts of one type are mile posts and the posts of another type are railroad telephone posts uniformly spaced from each other by 300 feet.
Claim 11
Dependent Claim
35 words
The improvement as defined in claim 8 wherein said distance selector means comprises a manually actuated switch having at least two operative positions respectively corresponding to the uniform distances of one mile and 300 feet.
Claim 12
Dependent Claim
32 words
The improvement as defined in claim 6 wherein said distance selector means comprises a manually actuated switch having at least two operative positions respectively corresponding to the uniform distances of different magnitudes.
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) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |