Abstract: An apparatus and method providing for ease of installation of a component on a substantially vertical surface. The apparatus, has a back case to be secured to the substantially vertical surface, and a front case securable to the back case, the front case having a raised lip along at least one edge. The back case has a plurality of installation brackets to support the front case by the raised lip. A method of installing a security system component on a substantially vertical surface includes securing a back case to the substantially vertical surface, the back case having a plurality of installation brackets, and supporting a front case in an installation position by the installation brackets. Leads connecting the security system to a component thereof mounted to the front case are secured to the front case, and the front case is secured to the back case in a use position.

Abstract: A battery housing unit with a releasable cover for minimizing mis-alignment of a battery housed therein during high impact loads. The battery unit includes a battery holder having retention members biased towards one another that receive a battery. The retention members engage stop ribs projecting from the cover. The cover fits over the retention members of the battery holder and to a base of the housing unit. The retention members and stop ribs are engaged when high impact loads are delivered to the housing unit and the battery is urged against the biasing nature of the retention members. Movement and mis-alignment of the battery is thus minimized and high impact loads are re-distributed throughout the cover. Detents may be provided on each retention member for engaging a corresponding cavity provided on each stop rib. The detents and cavities interlock the retention members and stop ribs together upon high impact. In this manner, movement and mis-alignment of the battery is also minimized.

Abstract: An electrical device to be mounted on a support includes a housing having an inner part and an outer part secured to one another. The housing is mounted on the support in a position in which the outer part of the housing is accessible. A cover plate is provided for obscuring the view of at least a portion of the housing and surrounding areas of the support. The cover plate has at least one through opening in it. The cover plate is secured to the housing by a screw passing through the opening and an aperture. The screw engages the thread of a threaded bore when the device is fully assembled. The outer housing part includes webs at or within the opening for engaging the shank of the screw and temporarily holding it, and with it the cover plate, in their proper positions prior to engagement of the shank thread with the bore thread.