Abstract: Safety device for vertically openable closures provided with a shutter mounted about a fixed tube (1), includes a fixed disc (10) provided with at least one radial opening (16-17), a movable disc (23) driven in rotation with the shutter, at least one blockage element (25-27) articulated on the movable disc (23) and including a free end (25a) of a shape adapted to be able to penetrate and to become blocked in each radial opening (16-17) of the fixed disc (10), and associated with each blockage element (25-27) resilient elements (32) adapted to permit a pivoting of this latter so as to cause its free end (25a) to become blocked in a radial opening (16-18) when the centrifugal force exceeds a given threshold value.

Abstract: A compact mechanical lock for bi-parting handles of passenger doors used on mass transit vehicles. Rotating lock cams cooperating with an interlocking lock plate to ensure proper closure of each panel prior to lock actuation.

Abstract: A jack shaft garage door operator for opening and closing a movable garage door has a drive containing an electric motor. A rotatable jack shaft is connected to the drive unit to be driven thereby. A pull-up cable drum is connected to and driven by the jack shaft. A pull-up cable extends from the drum about which it is wound and connects to a bottom part of the garage door to raise the door. A pivoting arm is mounted near the jack shaft and provides tension to the cable. A shaft lock hub mounted on the jack shaft is engaged and locked by the arm if the tension in the cable drops. A stop is mounted on the garage door for engagement by the movable arm in the event that the door is opened without the cable being drawn in the cable drum.

Abstract: An apparatus for preventing a motor rolling door from falling includes a wedge shaped sliding plate located at one side of a driven sprocket, which is biased away from the driven sprocket by means of two actuating rods forced by two springs. Two rollers at the outer ends of two actuating rods push against the inner surfaces of the upper and lower stringers of the drive chain to keep the sliding plate away from the driven sprocket. When the drive chain is broken, the two actuating rods extend outward due to the action of the springs, and bias the wedge sliding plate toward the driven sprocket to engage with the driven sprocket, so that the rolling door is prevented from falling by its own weight.

Abstract: A window assembly with a safety catch comprises a manually movable window sash which normally slides between a raised and a fully lowered position within a surrounding window frame. A weight is connected to the sash by a cable which counter-balances weight of the sash. The safety catch prevents downward falling of the sash to the fully lowered position in the event of breakage of the cable. The safety catch comprises a sash block spaced below the weight and clear of the sash when the cable is intact and the weight is positioned to fall if released from the sash to move the sash block to a blocking position which holds the sash above its fully lowered position.

Abstract: A safety device for engagement to the rotary shaft of a spring-loaded overhead door assembly so as to cover an adjustable end of the coil spring which imparts counterbalancing torque to the shaft. The safety device includes a cup-like sheath having a generally cylindrical side wall and an end wall having an axial opening therein. A tubular sleeve extends from the end wall around the opening and a threaded passage is present in the sleeve. A threaded fastener is threaded into the passage, the fastener being recessed in the passage and having a head whose outer surface is uninterrupted except for a plurality of spaced-apart small holes whereby the fastener can only be rotated by a tool which is sized to fit in said passage and which has a plurality of prongs which register with said holes.

Abstract: A truss roof and floor joist storage device which provides access to and creates convenient storage space for a large variety of typically stored items from boxes to sporting equipment to tools and seasonal items. The device includes a large shelf which rotates up between the trusses of a garage or up against the floor joists in a basement. It has an optional pulley to raise and lower the shelf and two latches for safety. It is aesthetically compatible in either finished (drywalled) or unfinished space.

Abstract: A security barrier apparatus suitable for use in residential, farm and industrial settings includes a motor, a chain and a brake mechanism for engaging the chain. The apparatus is mounted to a first support such as a post. The chain extends from the first support to a second spaced support and is raised and lowered relative to the ground by operation of the motor. The motor may be remotely actuated by an electronic transmitter. The apparatus further includes protective features to prevent damage to the motor in the event that a vehicle collides with the chain.

Abstract: A stop mechanism (40) for a rolling door system (10) having a drive shaft (16) connecting a roll cylinder (15) carrying door slats (12) and a power system (20), including a stator ring assembly (45) mounted coaxially of the drive shaft, a plurality of circumferentially-spaced slots (48) positioned on the radially inner surface (47) of the stator ring assembly, a generally cylindrical rotor (56) mounted within the stator ring assembly for rotation with the drive shaft, a cutout 65 in the rotor, a pivot 70 on the rotor, a stop dog (81) mounted on the pivot for rotation thereon responsive to centrifugal force created by rotation of the rotor, an axial projection (90) on the stop dog configured to engage the cutout at one rotational limit of the stop dog where the stop dog effects locking engagement with a slot, whereby the stop dog transmits stopping forces from the stator ring assembly to the rotor.

Abstract: A security barrier apparatus suitable for use in residential, farm and industrial settings. The apparatus includes a motor, a cable, a chain secured to the cable and a brake mechanism for engaging the chain. The apparatus is adapted to be mounted to a first support such as a post. The chain extends from the first support to a second spaced support and is raised and lowered relative to the ground by operation of the motor. The motor may be remotely actuated by an electronic transmitter. The apparatus further includes protective features to prevent damage to the motor in the event that a vehicle collides with the chain.

Abstract: A new and improved overhead door safety apparatus is disclosed for a cable controlled door whose movement is guided by a stationary guide track. The new apparatus includes a brake assembly which is attached to the door and which is responsive to a decrease in a predetermined cable tension. When the decrease in the predetermined cable tension takes place, the overhead door safety apparatus is actuated causing the brake assembly to apply a braking action on movement of the overhead door. More specifically, in the brake assembly, a cable-tension-responsive track follower guides motion of the door by following the track. The cable-tension-responsive track follower has a first and a second operating state. The first operating state permits smooth movement of the cable-tension-responsive track follower along the track as the door moves when a control cable maintains a predetermined amount of cable tension.

Abstract: A device for automatically holding a refrigerator door releasably in a fully open position relative to a refrigerated display cabinet. The device includes an elongated spring arm connected pivotally to a frame member of the cabinet and formed with an elongated slot which receives a pin connected to a frame member of the door. The pin slides in the slot and causes the arm to pivot outwardly as the door is swung open. As the door approaches its fully open position, the pin cams past detent lugs in the slot and then engages the lugs to prevent the door from closing unless the door is swung closed with sufficient force to cause the pin to cam reversely past the detent lugs.

Abstract: An electrically powered pet door assembly for use in a home or building. Each assembly includes a frame which is secured to an exterior surface of a building, a panel slidably mounted within parallel tracks of the frame, a rotatable and translational drive assembly for vertically raising the panel, a centrifugal brake for controlling the speed of the vertical opening or closing of the panel and a treadle for activating the rotational and translational drive assembly.

Abstract: In conjunction with a conventional power operated overhead door, such as a garage door, which has wire cables attached to the door for assisting in raising (opening) and lowering (closing) the door, a cam plate or dog having a toothed edge can be pivotably moved to instantaneously clamp or bind against the wire cable to stop its downward movement in the event any obstacle, such as a small child, is detected in the path of the door while it is being closed. The cam plate is biased to permit the wire cable to move in a direction to open the door.

Abstract: A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.

Abstract: A spring loaded safety member is pivotally mounted against a coil spring seated within the channel of a standard pulley and spring system which has been moved slightly in the channel. The safety member comprises sharp teeth and is normally retracted in the channel with a curved portion around a pin extending laterally therethrough. Upon failure of the cord or spring of the standard window system the safety member suddently pivots outwardly under spring pressure to engage the inner wall of the window frame.

Abstract: A tip-lock shoe for a window sash and the like, comprising: a hollow body adapted to slidably travel in a track; a locking member disposed in the body and movable between a retracted position enabling the body to slide freely in the track and an extended position for engaging the track and preventing movement of the body; a first lock activating member disposed in the body for engaging the window sash and for urging the locking member from the retracted position to the extended position responsive to tilting of the window sash and the like; and, a second lock activating member disposed in the body for engaging a counterbalance system for supporting the body in the track and for urging the locking member from the retracted position to the extended position independently of the first lock activating member and automatically responsive to a loss of counterbalance force, whereby the window sash and the like can be slidably and tiltably operated in normal fashion when the counterbalance system is operating properl

Abstract: A chain breakdown safety device for a power driven roller door, having a movable elongate rod with a rack thereon driven by a spring control, an idler attached to the rod for engagement with the chain, the idler being structured in a manner such that it will withdraw its engagement with the chain once the chain breaks, to permit a spring to displace the movable rod, causing the rack thereon to turn a gear which is provided with a ratcheted pawl, which engages the chain sprocket on the roller door drive winch in order to stop the door from falling, thereby protecting bystanders or equipment from injury or damage resulting from the breaking of the chain.

Abstract: A chain break safety device for vertically moving, bi-parting, counter-balanced elevator doors which comprises a block having a vertical lead disposed tapered opening, said block having limited vertical moveability with respect to the door, a braking member positioned within the tapered opening, a cage for maintaining the braking member in the tapered opening, and a resilient member adapted to deflect under the tension of the counter-balance system and move said block into a non-braking position and to cause the block to move into a braking position upon failure of the counter-balance system, thus pinching the braking member between the tapered surface and a static vertical member of the elevator door system.

Abstract: The invention relates to a safety device in particular for an overhead door or the like comprising fastening means for blocking the door which means are operated by an auxiliary cable under tension. The auxiliary cable having a breaking element is on the one hand connected to a reel provided with speed-limiting means for blocking the reel in case the rotation speed becomes beyond certain limits and on the other hand to the door via a lever shaped locking member which cooperates with the fastening means. The fastening means are held in an inoperative position by said locking member, while upon breaking of the breaking element the fastening means are released for blocking the door.

Abstract: A safety lock assembly for use with a garage door to prevent the latter from falling uncontrollably in the event the counterweight system supporting the garage door fails. The invention has a pivoted arm biased into a position blocking door movement. The counterweight system is attached to the pivoted arm to overcome the bias. In the event of a failure in the weight supporting members, the built-in bias will move the arm into its position where further significant movement of the door is prevented.

Abstract: For the purpose of holding a slide door of a vehicle at its fully opened position, a catch lever is provided on a bracket which is pivotally mounted on the slide door and a stopper means is additionally provided on the bracket to prevent the excessive pivoting of the catch lever. Because of the pivotable mounting of the bracket and the provision of the stopper means, the catch lever is prevented from being interfered by a curved portion of the guide rail guiding the sliding motion of the slide door for smooth opening and closing of the door and the device is free from any pronounced protrusion on the part of both the door and the guide rail.

Abstract: The invention is directed to a stop device for a lift type overhead door such as may be counterbalanced by springs and cables and having guide rollers operating in guide tracks at opposite sides of the door. The stop fixture is disposed one at each side of the door and includes a pivoted door stopping dog having an operating arm extending generally parallel to a door supporting cable. The dog is positioned at one side of a track flange directly opposed to a roller at the opposite side of such flange and the dog with its operating arm are tied to this roller in a fixed dimension relationship. The operating arm is connected to a door supporting cable so that if the cable breaks the arm is immediately actuated by a spring to swing the dog into engagement with the track flange, backed up by the opposed roller at the other side of the flange, to grip the flange therebetween and thus prevent the door from falling.

Abstract: A door having a leaf of flexible material and held in suspension for raising and lowering within an opening has two lines attached to the lower portion of the door leaf, one line at each of its ends. The lines are also connected to a hoist means. The ends of the door leaf are guided in U-shaped forms having lateral flanges, the flanges being attached to the vertical defining surfaces of the door opening and each form carries one of the lines that extends to the hoist means. Each line is connected to its respective end of the door leaf by an intermediate release and lock means which responds to a predetermined decrease in load on the respective line to lock and hold fast the door leaf against the lateral flanges of the respective U-shaped form in any position along the door's vertical path of movement.

Abstract: The invention relates to a safety latch assembly for a warehouse type door that has rollers riding in a vertical guide track, such track having latching holes at various points along its length. The latch assembly has a latch pin with a roller end spring biased toward the track, and rides on the track with the door until it comes into latching engagement with one of the aforementioned holes, and locks the door into its current position. Withdrawing the latch pin from the hole resets the bias spring as the door becomes unlocked.

Abstract: A window operator has a prime mover for opening and closing of a window, with the prime mover being drivingly connected to a drive output member through an intermediate gear structure. A clutch device in the drive structure senses the torque applied to the drive output member in a window closing operation and a switch operable by the clutch is effective to deenergize the prime mover when the torque applied to the output member reaches a predetermined value. The switch can be adjustably located relative to the clutch whereby the predetermined value at which the motor will be deenergized may be varied in order to obtain a desired tension on a member connected to the closed sash of the window, such as a chain connected to the sash of a skylight window.