The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1977
Filed:
Aug. 09, 1976
Terence J Collins, Schaumberg, IL (US);
Qonaar Corporation, Elk Grove Village, IL (US);
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.