US3901604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in aligning wheels
Assignee: Bear Automotive Service Equipment Co
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Filing: 1974-06-27
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Granted: 1975-08-26
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Expires: 1994-06-27
Abstract
Abstract Toe measuring apparatus including a light projector unit and a photoelectric receiver suspended from a wheel clamp on each front wheel. Each projector projects a narrow vertical beam parallel to the wheel axis and onto the opposite receiver. Each receiver comprises a pair of photosensitive elements which are partially shaded and connected to provide a readout in accordance with the zone of impingement of the incident beam to indicate the toe angle of the opposite wheel.
Inventors
- 👤 Louis L Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/26; G01B11/275; G01B11/2755; G01B2210/00; G01B2210/10; G01B2210/22; G01B2210/28; G01B2210/283
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A photoresponsive unit comprising: a first light projector assembly for projecting a first directional light beam; a first photosensitive receiver positioned along the axis of projection of said first beam to intercept said first beam; a second light projection assembly for projecting a second directional light beam, said second projection assembly being disposed vertically above said first photosensitive receiver; a second photosensitive receiver positioned along the axis of projection of said second beam to intercept said second beam, said first projection assembly being disposed vertically above said second photosensitive receiver; and each of said fIrst and second receivers including first and second photosensitive elements positioned on opposite sides of the respective axes, each of said elements providing a response signal which varies in accordance with the zone thereof on which the respective beams of light impinge.
Claim 2
Dependent Claim
136 words
A photoresponsive unit comprising: a first light projector assembly for projecting a first directional light beam; a first photosensitive receiver positioned along the axis of projection of said first beam to intercept said first beam; a second light projection assembly for projecting a second directional light beam, said second projection assembly being disposed vertically above said first photosensitive receiver; a second photosensitive receiver positioned along the axis of projection of said second beam to intercept said second beam, said first projection assembly being disposed vertically above said second photosensitive receiver; and each of said fIrst and second receivers including first and second photosensitive elements positioned on opposite sides of the respective axes, each of said elements providing a response signal which varies in accordance with the zone thereof on which the respective beams of light impinge.
Claim 3
Dependent Claim
31 words
A photo responsive unit as in claim 1 wherein each of said photosensitive units is provided with an exposed area which varies in height with the distance from such reference position.
Claim 4
Dependent Claim
30 words
A photoresponsive unit as in claim 2 wherein each of said units is a photoresponsive plate, and a shield over said plate provided with a pair of spaced triangular openings.
Claim 5
Dependent Claim
16 words
A photoresponsive unit as in claim 1 wherein each of said units is a photovoltaic plate.
Claim 6
Dependent Claim
45 words
A photoresponsive unit as in claim 1 wherein each of said units comprises a photovoltaic plate, and a shield defining a tapered opening over each of said plates, with the vertical height of each opening varying with the distance from the space between said plates.
References Cited (Backward Citations)
US3105625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |