Patent US3795075A successfully refreshed from Google Patents.
US3795075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable turnstile
Assignee: WESTERN DATA PROD Inc
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Filing: 1972-03-15
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Granted: 1974-03-05
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Expires: 1992-03-15
Abstract
Abstract This invention describes a controllable turnstile for allowing metered movement in either of two directions. A cogwheel assembly is located on the same shaft as a turnstile and is controlled by a pair of separately operated pawls. A push pawl prevents counterclockwise rotation, but allows clockwise rotation whereas a pull pawl prevents clockwise rotation, but allows counterclockwise rotation. Each pawl is biased by a spring into an undetented position and is normally held in a detented position by the application of power to a pair of separately controllable solenoids. In the absence of power both pawls are released and the turnstile is free wheeling in either direction.
Inventors
- 👤 W Orzechowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:55
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/14; G07F17/145; E; E06; E06B; E06B11/00; E06B11/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
213 words
A controllable turnstile for allowing metered movement in either direction comprising: a rotatable shaft having a toothed wheel on one side and a plurality of spaced-apart tubes for passenger control on the other side, each of said teeth having a first edge and a second edge; a first pawl having a leading edge contacting said first edge for preventing clockwise rotation of said shaft, said first pawl having a trailing edge cammable by said teeth in the presence of counterclockwise rotation of said shaft; a second pawl having a leading edge contacting said second edge for preventing counterclockwise rotation of said shaft, said second pawl having a trailing edge cammable by said teeth in the presence of clockwise rotation of said shaft, said first pawl and said second pawl being individually controllable for selectively allowing either clockwise or counterclockwise rotating of said shaft; a first solenoid for detenting said first pawl between said teeth and a second solenoid for detenting said second pawl between said teeth; and power serving means including first cam means for sensing the position of said first pawl in an undetented position and applying full power to said first solenoid and limit switch means for detecting detenting of said first pawl and reducing the power to said first solenoid.
Claim 2
Dependent Claim
213 words
A controllable turnstile for allowing metered movement in either direction comprising: a rotatable shaft having a toothed wheel on one side and a plurality of spaced-apart tubes for passenger control on the other side, each of said teeth having a first edge and a second edge; a first pawl having a leading edge contacting said first edge for preventing clockwise rotation of said shaft, said first pawl having a trailing edge cammable by said teeth in the presence of counterclockwise rotation of said shaft; a second pawl having a leading edge contacting said second edge for preventing counterclockwise rotation of said shaft, said second pawl having a trailing edge cammable by said teeth in the presence of clockwise rotation of said shaft, said first pawl and said second pawl being individually controllable for selectively allowing either clockwise or counterclockwise rotating of said shaft; a first solenoid for detenting said first pawl between said teeth and a second solenoid for detenting said second pawl between said teeth; and power serving means including first cam means for sensing the position of said first pawl in an undetented position and applying full power to said first solenoid and limit switch means for detecting detenting of said first pawl and reducing the power to said first solenoid.
Claim 3
Dependent Claim
50 words
A system according to claim 1 further including second cam means for sensing the position of said second pawl in an undetented position and applying full power to said second solenoid, and limit switch means for detecting detenting of said second pawl and reducing the power to said second solenoid.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |