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US 5,969,627 AGranted
Audible and audible-visible alarms with interchangeable cover
AssigneeWheelock, Inc.
InventorsPeter B. Tarlton, Inhong Hur
Life of this patent
Estimating the term…
Abstract
The bases of an audible alarm unit and an audible/visible alarm unit are configured to be used interchangeably with a single cover. The cover has an opening that receives a projecting wall portion on the base of the audible alarm unit and a receptacle for a strobe lamp unit on the base of the audible/visible alarm unit. The bases have mounting holes that enable the alarm units to be mounted on several types of standard backboxes, the cover concealing the screw holes for good appearance of the installed units.
Claims24
An alarm assembly comprising
- an alarm unit selected from an audible alarm unit and an audible-visible alarm unit;
- and
- a cover adapted for use interchangeably with the audible alarm unit and the audible-visible alarm unit and detachably connected to the selected alarm unit;
- the cover having a front wall and side walls extending generally rearwardly from the front wall, the cover defining a rear cavity that contains the selected alarm unit and the front wall having an opening and a front surface;
- the audible alarm unit having a base member adapted to support a sound generating unit, the base member having screw holes in selected positions adapted to receive screws by which the audible alarm unit is adapted to be attached to an electrical backbox and a projecting wall portion receivable with a close peripheral clearance in the opening in the front wall of the cover, the projecting wall portion having a front surface contoured and configured to match contours and configurations of adjacent portions of the front surface of the front wall of the cover such that the front surface of the cover and the front surface of the projecting wall portion of the base of the audible alarm unit are visually unitary;
- and
- the audible-visible alarm unit having a base member adapted to support a sound generating unit and a light generating unit that includes a strobe lamp unit having a mounting plate, a strobe lamp and a transparent strobe lamp cover, the base having screw holes in selected positions adapted to receive screws by which the audible-visible alarm unit is adapted to be attached to an electrical backbox, and having a receptacle adapted to receive the strobe lamp unit, the receptacle being defined by peripheral walls that are receivable with a close peripheral clearance in the opening in the cover and project out from the front surface of the cover so as to enable light from the strobe lamp unit to be emitted laterally and frontally with respect to the front surface of the cover.
4 more elements
An alarm assembly comprising
- an alarm unit selected from an audible alarm unit and an audible-visible alarm unit;
- and
- a cover adapted for use interchangeably with the audible alarm unit and the audible-visible alarm unit and detachably connected to the selected alarm unit;
- the cover being substantially rectangular in front elevation and having a front wall and side walls extending generally rearwardly from the front wall and defining a rear cavity containing the selected alarm unit, the front wall having a rectangular opening having longer edges parallel to opposite edges of the cover and a front surface;
- the audible alarm unit having a base member that is shaped and dimensioned to be received in nested relation to the rear of the cover and is adapted to support a sound generating unit, the base member having screw holes in selected positions adapted to receive screws by which the audible alarm unit is adapted to be attached to an electrical backbox and a projecting wall portion receivable with a close peripheral clearance in the opening in the front wall of the cover, the projecting wall portion having a front surface contoured and configured to match contours and configurations of adjacent portions of the front surface of the front wall of the cover such that the front surface of the cover and the front surface of the projecting wall portion of the base of the audible alarm unit are visually unitary;
- and
- the audible-visible alarm unit having a base member that is shaped and dimensioned to be received in nested relation to the rear of the cover and is adapted to support a sound generating unit and a light generating unit that includes a strobe lamp unit having a mounting plate, a strobe lamp and a transparent strobe lamp cover, the base having screw holes in selected positions adapted to receive screws by which the audible-visible alarm unit is adapted to be attached to an electrical backbox, and having a receptacle adapted to receive the strobe lamp unit, the receptacle being defined by peripheral walls that are receivable with a close peripheral clearance in the opening in the cover and project out from the front surface of the cover so as to enable light from the strobe lamp unit to be emitted laterally and frontally with respect to the front surface of the cover.
4 more elements
Dependencies are inferred from the claim text.