Communications: electrical – Visual indication – Movable
Patent
1983-10-19
1986-10-07
Brigance, Gerald L.
Communications: electrical
Visual indication
Movable
40449, 40497, 34081527, 34081505, G08B 500, G04C 1700
Patent
active
046162224
ABSTRACT:
In a display sign including a plurality of rotatable display elements to be flipped between opposite extreme display positions, a bidirectional limit stop for stopping the motion of said display elements at said extreme positions is configured in the form of a bidirectional pendulum. The limit stop is preferably formed by an oversize sleeve coaxially disposed with respect to and depending from a smooth-surface horizontally disposed support member. The rotatable display element is preferably generally planar and configured to strike the opposite sides of the outer surface of the pendulum-forming sleeve along a line passing below the point of support thereof. The resulting pivoting and rotating movement of the pendulum serves to absorb a substantial portion of the angular kinetic energy of the rotating display element, thereby suppressing rebound. A resilient element configured in the form of an O-ring annularly disposed around the outer surface of the hanging sleeve serves to absorb an additional portion of the shock, the sleeve contact-point advancing about the support member with each impulse so as to rotatingly present a fresh portion of the O-ring for impact, thereby spreading wear around the entire O-ring.
REFERENCES:
patent: 3975728 (1976-08-01), Winiow
patent: 4163332 (1979-08-01), Salam
patent: 4264906 (1981-04-01), Wakatake
patent: 4318098 (1982-03-01), McGreevy
patent: 4344070 (1982-08-01), Forest et al.
patent: 4417241 (1983-11-01), Wakatake
Arnold Stephen R.
Brigance Gerald L.
Hattis Russell E.
Kovalick Vincent P.
Time-O-Matic, Inc.
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