Hubbell Limited

David A Vosika

Steven W Bodell

Drusilla L Underwood

Robert S Feldstein

A structure for aligning a canopy for an exit sign with a standard wall-mounted electrical junction box. The structure is constituted of a separate plate which is adapted to be fastened to the back cover of an exit sign so as to form a mounting structure adapted for facilitating the attachment of the exit sign to a wall-mounted electrical junction box, and which incorporates slots adapted to be engaged by protuberances on the canopy for aligning the latter with the junction box in predetermined selective orientations.

Self-aligning canopy structure for connection to a mounting plate

A structure for mounting an exit sign to a standard wall-mounted electrical junction box. The structure is constituted of a separate plate which is adapted to be fastened to the back cover of an exit sign so as to form a mounting structure adapted for facilitating the attachment of the exit sign to a wall-mounted electrical junction box.

Circular mounting plate adapter for attaching an exit sign to a junction

An system is provided for testing emergency lighting units using a receiver connected to the emergency lighting unit and a portable transmitter operable remotely with respect to the emergency lighting unit. The emergency lighting comprises a transfer relay for switching a battery between a primary power source and a lamp. A TEST button and the receiver each include a normally closed contact switch connected in series with each other, as well as with a primary power source input and transfer control circuitry. The transmitter generates encoded signals for wireless transmission to the receiver as long as a control switch on the transmitter is being activated by a user. The receiver receives and decodes the encoded signals and opens its normally closed relay as long as encoded signals are being received, causing the transfer control circuitry to activate the transfer relay to switch the battery from the primary power source to the lamp. The transmitter terminates transmission of encoded signals when the user deactivates the control switch. The receiver then closes its normally closed relay when encoded signals are no longer received, and the transfer control circuitry via the transfer relay switches the battery from the lamp to the primary power source for charging.

Radio frequency controlled system for testing emergency lighting units

Combined emergency and exit light

Lighting fixture

A self-diagnostic circuit for an emergency lamphead is disclosed that is effective during standby operation of the lamphead to indicate whether the lamphead is capable of operating in an emergency mode. The self-diagnostic circuit includes a high-impedance circuit path connected in series with the lamphead and including an indicator, such as an LED, which is energized by a battery current passing through the circuit path and lamphead during the standby mode operation. The battery current is insufficient to illuminate the lamphead, but is sufficient to energize the LED whenever proper electrical continuity exists through the lamphead. A second high-impedance circuit path may be connected in parallel with the lamphead, in order to energize a second LED when proper continuity does not through the lamphead. The self-diagnostic circuit may be incorporated into each of a plurality of remote lampheads in a multiple-lamphead system, and may include a bipolar transistor or FET for isolating the self-diagnostic circuits of the lampheads from each other.

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Cloverdale, VA, United States of America

David A Vosika