Vandal resistant light signal unit

Details Vandal resistant light signal unit Vandal resistant light signal unit

1998-09-17

1999-06-01

Lefkowitz, Edward

Communications: electrical

Visual indication

Switchboard or panel type

34081545, 34081553, 34081556, 345 82, 345 83, G08B 536

Patent

active

059091827

ABSTRACT:
A vandal resistant light signal unit consisting of a modular integrated circuit arrangement having an insulative circuit board, which has a first broad area layer of conductive material on one side of the circuit board and a second broad area layer on an opposite side of the circuit board. The first layer defines a positive energy plane and the second a negative energy plane. Also, the unit has a plurality of independent series circuits connected in parallel to respective spaced points or nodes on the oppositely located layers of conductive material. Moreover, the broad area layers are connected to opposite sides of a power supply, and these layers constitute an arrangement for resisting vandalism occasioned by projectiles directed at said light signal unit.

REFERENCES:
patent: 4271408 (1981-06-01), Teshima et al.
patent: 4298869 (1981-11-01), Okuno
patent: 5859592 (1999-01-01), Carlin

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