Abstract: A novel damper kit is described wherein blade stock having a hook-shaped hinge portion formed therein, and notched angle bracket stock having periodically spaced hook-shaped hinge elements formed therealong can easily be cut and assembled at the job site to custom fit and install a damper in a duct, opening, or plenum.

Abstract: A novel smoke, fire or air control damper is disclosed wherein a frame with an inwardly depending flange is articulated to at least one rotating blade by integrally formed hook-shaped hinge elements and hinge portions which are stamped in the blade and flange respectively. This novel hinging relationship simplifies the material and construction required to form the damper, and more particularly, the blade of the damper, while providing a blade configuration which overlaps appropriate portions of the flange to form a seal between the overlapping portions of parallel offset blade portions and the appropriate opposite services of the frame flange, when the blade is in the closed position.

Abstract: A novel punch and die assembly is disclosed wherein an intermediate punch-and-die member having an aperture defined therein floats between a punch member and a die member. Upon activation, the pucnh-and-die member remains stationary while the punch member deforms a workpiece portion into the aperture. As the deforming operation effected by the punch member is completed, the punch member seats on the punch-and-die member to clamp the workpiece therebetween, after which the biasing of the punch-and-die member into its stationary position is overcome and the punch member, punch-and-die member and workpiece move in unison towards the die member to complete the forming process.

Abstract: A butterfly damper with a plurality of blades which can be locked in the open position, and which, when released, rotate about a hinge to the closed position. A pawl member, attached to one blade, extends away from the blade and through an opening in a second blade when the blades are in the open position. A mounting member attached to the second blade restrains the pawl member thereby holding the blades in the open position. A bimetallic link attached to the mounting member causes the pawl member to be released when the temperature of the air passing through the duct increases beyond a preselected level. A closure spring attached to the blades acts on the blades tending to force them apart against the action of the mounting member and the pawl member when the blades are restrained in the open position. The damper blades can be insulated to prevent the heat from a fire on one side of the damper from being conducted by the damper to the other side when the blades are in the closed position.

Abstract: A novel fire, smoke and air control damper is disclosed wherein one or more hook-shaped hinge portions formed intermediate between the longitudinal edges of each damper blade engage complementally configured hook-shaped hinge elements formed on opposite sides of the damper frame. Formed on each of the ends of each damper blade are additional hook-shaped sealing portions which are adapted to mate with the hook-shaped sealing portions of adjacent blades in the closed position in order to form a double seal. A "dead" air chamber is formed between contiguous portions of adjacent blades when those blades are in the closed position. As the blades are slightly displaced towards the open position, a seal is nonetheless maintained between the blades due to the configuration of the sealing portions thereof.

Abstract: A fire, smoke and air control damper is disclosed wherein one or more hook-shaped hinge portions formed intermediate between the longitudinal edges of each damper blade engage complementally configured hook-shaped hinge elements formed on opposite sides of the damper frame. A novel notch configuration is made in an inwardly depending flange in the frame on opposite sides, the hinge elements being made from at least a portion of the material notched from the frame. In the closed position, various blade portions engage opposite sides of the inwardly depending flange in the frame to form a seal therebetween, thereby providing a positive pressure resistant seal. The seal is made more complete along the flange in the area of the hinge element because of the novel notch configuration.Several embodiments of actuating the blades to move them between open and closed positions are disclosed. In one such embodiment, a link passes through an arcuate opening in the wall of the frame to engage a linkage rod.

Abstract: A novel smoke, fire or air control damper is disclosed wherein a frame with an inwardly depending flange is articulated to at least one rotating blade by integrally formed hook-shaped hinge elements and hinge portions which are stamped in the blade and flange respectively. This novel hinging relationship simplifies the material and construction required to form the damper, and more particularly, the blade of the damper, while providing a blade configuration which overlaps appropriate portions of the flange to form a seal between the overlapping portions of parallel offset blade portions and the appropriate opposite services of the frame flange, when the blade is in the closed position.

Abstract: A novel telescoping heat responsive releasing device is described wherein a mounting member on which a bimetallic means is mounted slidingly engages a pawl member which is movable between a first position in which the pawl member is capable of being restrained by the aforementioned bimetallic means, and an actuating position wherein associated apparatus connected to said releasing device may assume the desired heat responsive posture. Various alternate embodiments are illustrated wherein a plurality of bimetallic elements are utilized to engage the pawl member, wherein a bimetallic element is additionally actuated mechanically or electrically, and wherein various pawl and mounting member configurations are illustrated.

Abstract: A fluid piston actuated press is provided with a fixed portion, such as a die, and a plurality of movable portions, such as punches, which move reciprocally along paths which intersect the fixed portion. A plurality of levers, actuated by an actuating means, engage the movable portions to cause them to move along their paths intersecting the fixed portion.

Abstract: A novel fire, smoke and air control damper is disclosed wherein one or more hook-shaped hinge portions formed intermediate between the longitudinal edges of each damper blade engage complementally configured hook-shaped hinge elements formed on opposite sides of the damper frame. Formed on each of the ends of each damper blade are additional hook-shaped sealing portions which are adapted to mate with the hook-shaped sealing portions of adjacent blades in the closed position in order to form a double seal. A "dead" air chamber is formed between contiguous portions of adjacent blades when those blades are in the closed position. As the blades are slightly displaced towards the open position, a seal is nonetheless maintained between the blades due to the configuration of the sealing portions thereof.

Abstract: A rotating blade, smoke, fire and air control damper with spring closures attached on both inside and outside surfaces of the blades is disclosed. The spring closures cooperate with a bimetallic heat sensing device to trigger the closing of the blades at a predetermined temperature.

Abstract: A resettable fire link is described comprising a releasable member, gripping means for engaging said releasable member in the normal position and for releasing said releasable member in the activated position. Said gripping means comprises heat responsive means for causing said gripping means to move to the normal position in response to an ambient temperature and for causing said gripping means to move to the activated position in response to a preselected increase in said ambient temperature. Mechanical activation means are also provided for movement from a first withdrawn to a second extended position. In said first withdrawn position, the mechanical activation means allows said gripping means to move freely between its normal and said activated position, as aforesaid. The mechanical activation means also may independently cause said gripping means to move to the activated position.

Abstract: A resettable fire link is described comprising a releasable member, gripping means for engaging said releasable member in the normal position and for releasing said releasable member in the activated position. Said gripping means comprises heat responsive means for causing said gripping means to move to the normal position in response to an ambient temperature and for causing said gripping means to move to the activated position in response to a preselected increase in said ambient temperature. Mechanical activation means are also provided for movement from a first withdrawn to a second extended position. In said first withdrawn position, the mechanical activation means allows said gripping means to move freely between its normal and said activated position, as aforesaid. The mechanical activation means also may independently cause said gripping means to move to the activated position.

Abstract: An improved clutch is described for use in a smoke and fire protection system comprising a pulley which in the normal operating position is engaged by a torque transmitting means so that the pulley may be controlled by an associated drive mechanism such as a stall motor or break motor. Either upon receipt of a signal from a remote source or upon an increase in the ambient temperature surrounding the apparatus, such as might occur during a fire, a heat responsive means disengages the pulley from the torque transmitting means thereby allowing the pulley to freely rotate about its axis to deploy its associated fire protection equipment. In the preferred embodiment, one or more bimetallic links of either "straight" or serpentine configurations are employed to move the pulley axially along its axis of rotation, thereby disengaging the pulley from an adjacent associated drive plate.

Abstract: A fluid piston actuated press is provided with a lever arm having multiple bearing means for transmitting and amplifying the force exerted by a piston to the movable parts of the press and work piece. A novel fulcrum bearing is provided which ensures that frictionally induced shearing forces are counteracted. This is achieved by allowing the bearing to reciprocate along an axis which is acute with respect to the stroke axis. Additional means are provided to adjust the degree of amplification and stroke of the movable part without altering the stroke of the fluid piston. A novel arrangement of component parts is described which allows easy accessibility to the work area and great flexibility of application.

Abstract: A combination grill, air damper and fire damper is provided with a means for adjusting the volume of flow of air through the damper.

Abstract: An air control apparatus is provided comprising a frame housing a plurality of extendable metal curtains spaced from one another in parallel planes, said curtains being extendable between a folded open condition and an unfolded closed condition.