US 4,071,749 AGranted

Self-contained maintenance-free emergency lighting

AssigneeTork, Inc.

InventorAndre Balogh

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Abstract

A self-contained maintenance-free emergency lighting system involving a housing including a tough plastic cover so as to protect the system from vandalism; in order to test the system to determine whether it is operating properly, i.e., such that the emergency battery supply will furnish power to the emergency lamp, a magnetically operated test switch is included within the housing. By such feature, no external projection of a switch or the like is required. An arrangement is also provided for allowing the emergency lamp or bulb to float; that is to say, to preclude any kind of shock to the dome or cover from causing breakage of such lamp. Also, the plastic dome is extremely difficult to remove in that a tamper-proof screw is provided which is not readily visible nor is it readily accessible. An electrical circuit arrangement is also provided which includes a transfer relay which is normally open.

Claims7

Dependent claims

An emergency lighting device operable to connect a battery supply to an emergency lamp or the like in response to failure of the normal AC supply, comprising

a. a base plate for mounting said device to a suitable surface;
b. means in the form of a dome-like, tough plastic, cover defining a housing for said device, said cover completely surrounding all components including said base plate, and said cover being free of any magnetic material adjacent the magnetically operated test switch recited hereinafter;
c. means for holding said cover in engagement with said base plate so as to secure said cover against tampering;
d. means within said housing for responding to a failure of AC power and for connecting the battery supply to the emergency lamp;
e. a reflector mounted to said base plate for reflecting light from said emergency lamp;
f. a magnetically operated test switch disposed immediately adjacent and inside said cover, said test switch being operable for simulating failure of AC power by disconnecting said power from the aforesaid means for responding, whereby the emergency lamp becomes illuminated in the event that said components are functioning properly;
g. means in the form of a removable magnet normally located remotely from the test switch for operating said switch.

4 more elements

Dependencies are inferred from the claim text.