Abstract: A wrench for tamper switch installation for use with a tamper switch arrangement including an enclosure containing a tamper switch assembly having a mounting rail for assembling the tamper switch assembly to a security system enclosure. The wrench may be capable of holding two separate nuts and have cooperating mating structure to slidably mate with the mounting rail of the tamper switch arrangement. The nuts may be frictionally-fitted into the wrench, after which the wrench is slidably moved onto the mounting rail until the nuts line up with two throughbores in the mounting rail. Two screws or bolts are then inserted through a surface of the security system enclosure and traverse the throughbores in the mounting rail. The screws or bolts then threadably engage the two nuts disposed within the wrench and are threaded therethrough via rotation with a suitable instrument, e.g., a screwdriver, located outside of the security system enclosure.

Abstract: A tamper switch arrangement detects tampering with a device, and includes a tamper switch assembly having a tamper switch with a first part and a second part. The first and second parts are movable relative to each other between an open switch position and a closed switch position. The tamper switch is biased into one of the open and closed switch positions. An enclosure substantially encloses the tamper switch assembly and the device. The enclosure includes a door and an opening disposed opposite the door. The enclosure is sized such that the tamper switch assembly may be compressed between an inner surface of the door and a second surface via the opening to thereby overcome the bias and actuate the tamper switch into an other of the open and closed switch positions.

Abstract: An optical smoke detector for detecting particulates in an air sample. The detector includes a detection chamber defining an enclosure for the air sample. At least one opening is in fluid communication with the detection chamber whereby the air sample can be introduced and discharged from the detection chamber. A cleaning port defines a passageway to the detection chamber from a position external to the smoke detector and a resilient valve seals the cleaning port with a substantially air-tight seal. The valve member is accessible from a position external to the smoke detector. The valve member is openable, permitting passage of air through the cleaning port into the discharge chamber, by engaging the valve member with a nozzle, such as an air nozzle mounted on a canister of pressurized air.

Abstract: A security device mounted on a support including a housing with a removable section and a base section. A terminal assembly having first and second terminals is disposed on a detachable portion of the housing that is directly mounted to the support. A printed circuit board and a pin assembly having first and second pins is mounted in the removable housing section. Attaching the removable housing section to the device inserts the first and second pins into the first and second terminals respectively. A conductive material provides electrical communication between the first and second pins whereby a tamper detection circuit can be defined between the first and second terminals. Disengagement of one of the first and second pins from its respective terminal opens the tamper detection circuit. Detachment of the removable housing section disengages the pins from the terminals thereby opening the tamper detection circuit.