Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Successive position-type; e.g. – turnstile
Patent
1983-03-04
1985-07-02
Downey, Kenneth
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
Successive position-type; e.g., turnstile
49 35, E06B 1108
Patent
active
045259518
ABSTRACT:
A locking and releasing mechanism for a turnstile has a locking member which abuts a stop roller mounted on the hub of the turnstile at a spacing from its axis, to prevent rotation. A sleeve portion of the locking member is axially slidable in a cylinder and a plurality of balls retained in circumferentially disposed holes in the sleeve wall latch the member in its locking position by engaging in angled recesses in the cylinder wall. A latch release piston axially movable within the sleeve by an air motor has a peripheral groove and the locking member is unlatched by aligning the groove with the sleeve holes so that the balls disengage from the recesses and engage in the groove. The balls are urged towards the groove by springs and where present by axial loading of the locking member resulting from attempted rotation of the turnstile.
REFERENCES:
patent: 3559341 (1971-02-01), Alvarado
patent: 3771262 (1973-11-01), Gaulier
patent: 3795075 (1974-03-01), Orzechowski
patent: 3978613 (1976-09-01), Hayward et al.
Coras Iompair Eireann
Downey Kenneth
LandOfFree
Barrier unlocking mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Barrier unlocking mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Barrier unlocking mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-374865