Abstract: An equipment enclosure system includes an equipment enclosure mounted through a hole in a roof and a chassis supporting the mechanical equipment and which is moveable between a lowered position within the enclosure and a raised position relative to the enclosure to provide access to said equipment. A cover mounted on chassis advances into covering relationship over the enclosure when the chassis is retracted.

Abstract: An equipment enclosure system includes an equipment enclosure mounted through a hole in a roof and a chassis supporting the mechanical equipment and which is moveable between a lowered position within the enclosure and a raised position relative to the enclosure to provide access to said equipment. A cover mounted on chassis advances into covering relationship over the enclosure when the chassis is retracted.

Abstract: An isolation damper for preventing the migration of air from a ventilated space includes a high differential pressure sealing chamber in the damper assembly that prevents the flow of air from the “clean” side of the damper assembly to the “dirty” side thereof. Pressurized air leaking out of the sealing chamber creates reverse flow leakage toward the dirty side which assures the clean side air is not contaminated by the dirty side air. Differential pressure between the sealing chamber and the dirty side is monitored with the differential pressure reported and alarmed externally if reductions in pressure indicate the sealing effect of the sealing chamber could be affected.

Abstract: The present invention is directed to a lock that provides a multipoint lock that includes reinforcement of the door and jamb on a relatively continuous basis. The lock is for installation in a residential or commercial door having a door frame or jamb and a door. The lock includes a fixed strip coupled to the door jamb, a sliding strip slidably coupled to an edge of the door configured to slidably engage the fixed strip, and a mechanism moveably engaged to the sliding strip for vertically moving the sliding strip to engage the fixed strip. Both the sliding strip and fixed strip have at least one tab extending outwardly therefrom and configured to engage each other. If desired, these tabs could be extended all along the sliding and fixed strips to provide a series of engagement points that serve to uniformly connect the door edge to the door jamb. Each tab on the door edge is formed so it can lock into the similar shaped tab on the door jamb to provide a secure point of connection.

Abstract: A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space when the damper is open and blocked when the damper is closed. The proportion of on to off time during each duty cycle is adjusted to meet the load. When several supply terminals serve a space, their duty cycles are staggered to avoid fan instability. A special motor is coupled directly to the damper shaft for fast opening and closing of the damper. A magnetic latch holds the damper open or closed until the motor moves it again.

Abstract: The present invention relates to a removable battery system for a smoke detector having a low battery detection circuitry and an audible alarm. The system includes a pair of battery receivers each adapted to receive a battery therein and being electrically coupled to the low battery detection circuitry and the audible alarm wherein at least one of the batteries provides constant power to the low battery detection circuitry and the audible alarm. The system further includes a cover that is selectively movable to provide access to the battery receivers and a locking mechanism coupled to the pair of battery receivers wherein upon failure of one of the batteries received in the pair of battery receivers that provides constant power to the low battery detection circuitry and the audible alarm, the low battery detection circuitry sounds the audible alarm and selectively activates the locking mechanism to prohibit movement of the cover.

Abstract: A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space when the damper is open and blocked when the damper is closed. The proportion of on to off time during each duty cycle is adjusted to meet the load. When several supply terminals serve a space, their duty cycles are staggered to avoid fan instability. A special motor is coupled directly to the damper shaft for fast opening and closing of the damper. A magnetic latch holds the damper open or closed until the motor moves it again.

Abstract: Multiple methods of supplying conditioned air to a room and components therefor are provided. A dual plenum system has a supply plenum for delivering supply air to the room and a return plenum for returning room air to an air handling unit. Conduits are provided to permit passage of the return air through the supply plenum without breaching the integrity of the supply plenum. Modular units permit a user to customize the supply and return apparatuses. A terminal unit having a controllable damper blade can be applied to a diffuser to permit the unit to be convertible between a constant volume unit and a variable volume unit. A thermostat generates signals that open and close the damper blade at determined intervals.

Abstract: A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space when the damper is open and blocked when the damper is closed. The proportion of on to off time during each duty cycle is adjusted to meet the load. When several supply terminals serve a space, their duty cycles are staggered to avoid fan instability. A special motor is coupled directly to the damper shaft for fast opening and closing of the damper. A magnetic latch holds the damper open or closed until the motor moves it again.

Abstract: A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space when the damper is open and blocked when the damper is closed. The proportion of on to off time during each duty cycle is adjusted to meet the load. When several supply terminals serve a space, their duty cycles are staggered to avoid fan instability. A special motor is coupled directly to the damper shaft for fast opening and closing of the damper. A magnetic latch holds the damper open or closed until the motor moves it again.

Abstract: A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space when the damper is open and blocked when the damper is closed. The proportion of on to off time during each duty cycle is adjusted to meet the load. When several supply terminals serve a space, their duty cycles are staggered to avoid fan instability. A special motor is coupled directly to the damper shaft for fast opening and closing of the damper. A magnetic latch holds the damper open or closed until the motor moves it again.

Abstract: Multiple methods of supplying conditioned air to a room and components therefor are provided. A dual plenum system has a supply plenum for delivering supply air to the room and a return plenum for returning room air to an air handling unit. Conduits are provided to permit passage of the return air through the supply plenum without breaching the integrity of the supply plenum. Modular units permit a user to customize the supply and return apparatuses. A terminal unit having a controllable damper blade can be applied to a diffuser to permit the unit to be convertible between a constant volume unit and a variable volume unit. A thermostat generates signals that open and close the damper blade at determined intervals.

Abstract: A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space when the damper is open and blocked when the damper is closed. The proportion of on to off time during each duty cycle is adjusted to meet the load. When several supply terminals serve a space, their duty cycles are staggered to avoid fan instability. A special motor is coupled directly to the damper shaft for fast opening and closing of the damper. A magnetic latch holds the damper open or closed until the motor moves it again.

Abstract: Modular terminals for supplying conditioned air to spaces within buildings can be mounted and configured to provide improved heating, cooling, ventilation, and mixing of the supplied air with the space air. The flexibility in arranging the modular terminal components, such as air inlets, outlet grilles, dampers, and induction sleeves, permits for selectively altering the flow pattern, quality, volume, and velocity of air introduced into a space. The modular terminals can selectively draw air from a plenum, duct, or both. The terminals accommodate electrical wiring for office equipment, and also may accept flexible ducting to deliver conditioned air from a desktop or other furniture. The modular terminals also are part of a system and method for conditioning building spaces whereby a number of terminals are controlled in response to selected sensor readings. Various air handling units combine with the terminals to cycle the air and supply a source of filtered and conditioned air to the terminals.

Abstract: Modular terminals for supplying conditioned air to spaces within buildings can be mounted and configured to provide improved heating, cooling, ventilation, and mixing of the supplied air with the space air. The flexibility in arranging the modular terminal components, such as air inlets, outlet grilles, dampers, and induction sleeves, permits for selectively altering the flow pattern, quality, volume, and velocity of air introduced into a space. The modular terminals can selectively draw air from a plenum, duct, or both. The terminals accommodate electrical wiring for office equipment, and also may accept flexible ducting to deliver conditioned air from a desktop or other furniture. The modular terminals also are part of a system and method for conditioning building spaces whereby a number of terminals are controlled in response to selected sensor readings. Various air handling units combine with the terminals to cycle the air and supply a source of filtered and conditioned air to the terminals.

Abstract: Key evaluating apparatus for receiving a key having a surface whose amplitude or height is variably coded and for sensing the coded key surface to provide a set of sample signals corresponding to a sequence of sampling points on the coded key surface. The key evaluating apparatus of this invention comprises a key follower suspended to follow the movement of the coded key surface as the key is inserted past a fixed point. A key movement responsive mechanism is responsive to the movement of the key follower for generating the set of signal samples corresponding to the sequence of sampling points of the coded key surface.