Brakes – Operators – Speed-responsive
Patent
1976-08-09
1977-05-03
Reger, Duane A.
Brakes
Operators
Speed-responsive
49 43, 49 46, F16D 5900, E05D 7086
Patent
active
040209270
ABSTRACT:
A turnstile construction wherein arms normally block the path of movement of persons passing through the turnstile, the arms being engaged when authorized passage is available resulting in movement of the arms either by the force of the person passing through. A brake is provided so that bi-directional speed control is automatically provided in all modes of use. The brake mechanism is associated with a support for the arms to limit the speed of movement of the arms, particularly at the conclusion of the movement required for the passage of one person through the turnstile. A cam structure is drivingly connected to the support to disable the brake means during a substantial portion of the arm movement. As the arm movement approaches the end of a cycle, the cam structure provides for repositioning of the brake means whereby the brake means are able to slow down arm movement, for example, if the person using the turnstile is attempting to move too fast.
REFERENCES:
patent: 1578660 (1926-03-01), Hedley et al.
patent: 3349876 (1967-10-01), Sheckells
patent: 3364620 (1968-01-01), Hess et al.
Qonaar Corporation
Reger Duane A.
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