Abstract: Improvements to a door frame and a door having an outer edge and an inner edge mounted for movement between an open position of the door withdrawn from the door frame and a closed position of the door received by the door frame, the improvements including bearing components carried by the door frame and the door proximate to the outer edge. One of the bearing components includes a member, and the other one of the bearing components includes a roller. The roller is brought into rolling contact directly against the member as the door is closed and remains in rolling contact directly against the member when the door is closed, positively lifting and supporting the door thereby preventing the door from sagging or binding on the door frame as the door is almost closed and when the door is in the closed position.

Abstract: A safety barrier for a loading dock lift that includes a lift platform that can be raised and lowered. The safety barrier includes a sleeve attached to the lift platform extending along a vertical axis. The sleeve includes guides to define open and closed positions of said gate and said shaft includes a pin that interacts with the guides to produce rotation of said gate between open and closed positions. Consequently each embodiment gate automatically closes due to gravity whenever the lift is raised off the ground and thereby assures that that gates are locked in position when the lift platform has been raised a short distance.

Abstract: A hinge assembly for attaching a door member to a main structure is provided. The hinge assembly, in an embodiment, includes a first hinge member securely attached to one of the door member or the main structure; a second hinge member securely attached to the other of the door member or the main structure and rotatably engaging the first hinge member; and a cam/spring assembly configured to bias the door member into an open or a closed position with respect to the main structure.

Abstract: A gate assembly including a frame for positioning in an opening through which selective entry is required. A barrier is mountable on the frame via a hinge and the barrier is movable relative to the frame between a closed position, wherein the opening is closed, to an open position, wherein the opening is open. An automatic closure mechanism is provided for moving the barrier from the open position to the closed position without user intervention. The automatic closure mechanism is associated with the hinge and includes at least two ramps or inclined surfaces on which at least part of the gate travels when moving between the open and closed positions.

Abstract: A safety device for a glove port includes a hatch that is rotatably fixable by a hinge arrangement to an outer frame of the glove port so as to rotate between a closing position and an opening position for preventing or allowing access to the glove port, respectively. The device further includes a sensor associated associable with the glove port and arranged for engaging and/or detecting an abutment portion of the hatch in the closing condition and generating an alarm signal when the abutment portion does not engage the sensor, in particular when the hatch is not in the closing position.

Abstract: A door closing device (10) for an automatic closing of a door leaf (B) coupled with a floor and/or a doorpost (S) so as to swing. The door closing device (10) comprises a fixed unit (12) that is fixed on the floor and/or the doorpost (S), a translating unit (14) and a rotating unit (16) on which the door leaf (B) is fixed. The coupling of the three units (12, 14, 16) and the presence of spring (38) are such that, when the rotating unit (16) rotates in a first sense of rotation, the translating unit (14) is caused to translate in a direction and such that, when the translating unit (14) translates in an opposite direction, the rotating unit (16) is caused to rotate in an opposite sense of rotation.

Abstract: A powered post assembly includes an enclosed actuator that supports rotation of a gate. An outer tube defines a hollow interior space. A fixed post and a rotating post are both disposed within the oval tube. The actuator is mounted within the fixed post and drives rotation of the rotating post. Because the actuator is disposed within the fixed tube, it is sheltered from the elements and from undesired tampering.

Abstract: A gate opening system which includes a barrier and a barrier mounting adapted to mount the barrier in an open or closed condition, a retention device to secure the barrier in an open or closed condition, a drive element, and an energy transmission system, whereby energy is transferred from the weight of a vehicle and is in turn transmitted through the transmission system to rotate the drive element, causing the barrier mounting to be lifted, the disengagement of the retention device, and the barrier thereby opened or closed.

Abstract: A double-acting door closure device that automatically returns a double-acting door to a preferred center position comprises first and second members each having a helical end surface extending transversely of its center axis. The first member is secured in spaced relation to a door jamb and the second member is mounted on and secured to a door post that extends through and is rotatable in the first member, with the helical end surface of the second member facing and engaging the helical end surface of the first member. The helical end surfaces coact with one another to gravitationally return a door attached to the door post to a closed position automatically after the door has been pushed opened and then released.

Abstract: A lid lifter mount is installed on the hinge pin of a conventional manway lid, and has a compression spring assembly engaging a lever which is also installed on the hinge pin. The lever has a bar engaging a lid hinge arm. A spring force adjustment screw connected to the mount enables adjustment of the amount of lift assist the bar applies to the hinge arm by cam action against the arm as the operator lifts the lid. Two embodiments are shown for attachment to two types of lid hinges.

Abstract: A one-way self closing gate such as may be used in retail stores, airports or libraries is provided with an inclined helical ramp mechanism by which opening of the gate also causes lifting of the gate arm relative to the gate base. When released the gate will tend to close itself under the force of gravity. To augment this gravity force a spring is provided which is compressed as the arm rises relative to the base. So that the gate does not close too quickly a screw presses a nylon slug against the turning shaft of the gate. When the gate is closed a force applied to open the gate in the contrary direction to that intended is resisted by abutment of a generously welded internal stop against a generously welded internal upright. In an alternate form this resistance function in the closed position is performed by an adjacent post positioned to intercept the motion of the moving barrier. In all cases the internal mechanism of the gate is enclosed in a housing to prevent injury to children's fingers.

Abstract: A cam actuator (12) for rapidly opening an aircraft door (14) that is attached to an aircraft fuselage (18) by a hinge assembly (26). The actuator includes a piston (40), a piston rod (42) that is secured to the piston and rotating sleeve (44) that is fitted over the piston rod that functions as the hinge pin between a hinge clevis (26) on the aircraft and a hinge arm lug (54) on the hinge assembly. The piston is contained within a housing (38) adapted to receive a pressurized pneumatic gas. An annular cam (50) through which the piston rod travels and that is formed with an outer surface (104) having a helical profile is attached to the hinge clevis. A cam follower (46) is attached for the sleeve so as to rotate in unison therewith. The hinge arm lug (54) is also secured to the sleeve (44) for rotation. When the actuator of this invention is triggered, the piston rod (42) urges the cam follower (46 ) against the cam (50) so as to cause the cam follower to rotate.

Abstract: An automatic gate opening device is provided which simultaneously lifts and opens the gate. A drive mechanism forces the gate upward, while a roller bearing following a helical slot in a tube causes rotation of the gate. Hinges are provided which allow simultaneous rotational and linear displacement of the gate.

Abstract: An improved crossing gate for railroad grade crossings. The gate is constructed of an impact-resistant material, and the crossing arm is mounted so that it will swing out of the way and return to its original position if struck by a moving vehicle from either direction. The crossing arm also contains protected lighting that will withstand impact, and provision is made to permit easy replacement of burned-out light bulbs.

Abstract: A toilet cubicle having a pair of post engaging side panels bracketed to a rear wall and a top headrail engaging the side panels have doors rotatably joined in spaced apart relationship to the posts. Each door is pivotally supported by a foot disposed in spaced relationship to the posts. The feet have a threaded insert supporting base receiving an adjustably threaded member, and a gravity hinge and door pivot supporting cap engaging the opposite end of the threaded member. A nut on the threaded member is movable to engage an upper surface of the base. The nut has a transverse thread for receiving a tapered end set screw to destructively engage the threads of the threaded member and fix the nominally open positioning of the door, and resist travel thereafter.

Abstract: A remotely operated gate opening and closing system including a gate post with two vertically spaced helical slots through the walls of the post, a slideable and rotatable spindle concentrically inside the gate post, two L-shaped pins attached to the spindle and extending outwardly through the slots, a swinging gate with two eye supports pivotally connected to the two L-shaped pins, two spaced lever arms rigidly connected to the swinging gate and having a lug projecting horizontally outwardly toward the gate post, a locking bar selectively manually attachable to lock each lug to its respective L-shaped pin, a vertically reciprocating rod attached to the spindle, and a power drive for moving the rod.

Abstract: To prevent breakage, an end section that can be positioned across a roadway is connected through a slanting pivot to a supporting section, the raised and lowered positions of the supporting section being under control of a usual standard. The pintle of a hinge for the pivot lies along slanting abutting ends of the supporting section and the end section such that the end section while the sections are horizontal is maintained in position by gravity. An L-shaped latching device has a weight at one end, an intermediate pivot, and a latch at the other end to latch the sections together by gravity while the sections are raised from a horizontal position, the latch retaining said end section upright while the supporting section is fully raised.

Abstract: A counterbalancing system (30) for an inwardly/outwardly moving door (20) pivotable about an inclined hinge axis between fully closed and fully opened positions wherein the door (20) moves: (i) upslope through angle .beta. and downslope through angle .theta. as it opens; and (ii), upslope through angle .theta. and downslope through angle .beta. as it closes. The door (20) is hinged to a torque tube assembly (25) coincident with the hinge axis; a radial cam (38) having a profiled cam face (36) is mounted on the torque tube assembly (25) for rotation through the angles .beta. and .theta.; and, springs (31, 32) are mounted within a housing (34) having a reciprocable piston (44) and a cam follower (35) carried thereby for biasing the follower (35) into engagement with the cam face (36). As door (20) moves downwardly through angles .beta. and .theta., the springs (31, 32) are compressed and energy is stored therein. As door (20) is manually shifted upslope through angles .beta. and .theta.

Abstract: An improved door having a door nose and a door mounting component which attach to the door panel in a manner which minimizes fastener exposure on the outer surface of the door and reduces cost of assembly.

Abstract: The disclosure describes a device enabling a gate to pivot while making a vertical lifting. The device comprises a vertical member, such as a metallic post, helicoidal guides on the vertical member, displacing means fixed on the gate and associated with the helicoidal guides as well as means enabling a vertical lifting of the gate when the displacing means follow a path which is determined by the helicoidal guides, which enable the gate to pivot and to open while making said vertical lifting. This gate has as a main advantage to overcome the difficulties resulting from snow falls, and finds its main utility in the electrical substations and buildings which must often be reached in spite of adverse weather conditions.

Abstract: A compact, cam operated, counterbalance system (30) is provided for the torque tube assembly (25) associated with a moveable hinged structural member (20) of the type hingedly connected to a fixed structural member and adapted to pivot about an inclined hinge axis in which the counterbalance system includes: (i) a cylindrical cam (31) surrounding a torque tube (38) and defining an axially presented continuous cylindrical cam surface (32) formed by a plurality of axially presented curved ramps (32a, 32b); (ii) cam follower means (34, 35, 36) mounted concentrically about the torque tube (38); (iii) a compression spring (42) mounted concentrically about the torque tube (38) for continuously biasing one of the cylindrical cam (31) or the cam follower means (34, 35, 36) axially towards the other; (iv) one of the cylindrical cam (31) and the cam follower means (34, 35, 36) being rigidly mounted on the fixed structural member (22); (v) the other of the cylindrical cam (31) and the cam follower means (34, 35, 36) bei

Abstract: A self-closing door hinge for a curtain door mounted within a frame consisting of a channel having a double helical track and a roller on said helical track which is returned to a pre-selected position after movement in either direction by compression of a spring thereby moving an arm carrying a curtain door connected to said channel to a preselected position.

Abstract: Automatically operable automotive vehicle gate apparatus provided with self protection and automotive protection. The gate apparatus includes operational mechanism which moves a gate member within a gateway between a closed position and an open position. The gate apparatus also includes structure which permits the gate member to be moved to an open position when opening forces are applied thereto, without operation of the operational mechanism. Thus, the gate apparatus is protected against damage. The gate apparatus also includes mechanism which permits the gate operation mechanism to move from an open position to a closed position while the gate member remains in an open position. Thus, if an automotive vehicle should be within the gateway when closing action of the gate operation mechanism occurs, the automotive vehicle is protected against damage.

Abstract: A multi-panel closure is disclosed in which a fastening member comprising a pair of integral back-to-back channels is positioned between the facing pair of edges of adjacent panels. The facing side sections of each channel grip the aforesaid edges between them. The panels are positioned so as to have at least one edge in alignment with each other. A split sleeve which is fastened to a rotatably supported closure post includes a pair of parallel flanges which receive the aligned panel edges therebetween and which are riveted to each panel along its aligned edge.

Abstract: An apparatus for use in elevating the movable end of the a swinging gate and for supporting and maintaining the end of gate in a predetermined position, whereby the locking drop rod of the gate may be selectively and cooperatively received by the apparatus to thereby lock the gate from further swinging movement.

Abstract: Apparatus is disclosed for use with an automatic closure of the type wherein the closure member, such as a door, returns to a home position when displaced therefrom. The closure member is at least partially supported by a hanger arm secured to a cam follower that rides on a cam track. The cam track forms part of a stationary structure which provides a bearing for a rotatable post. The post may carry further support means for the closure member.

Abstract: An air seal is provided for restraining the flow of air through a cut-out section of a door which accommodates a door closing mechanism. A pair of nested cover strips individually flexed to a U-shaped configuration is mounted astride the mechanism, the bight of the outer strip resiliently abutting a vertical surface of the cut-out section in air sealing contact. The inner strip, which has greater resistance to flexing than the outer strip, contacts the side sections of the outer strip to stiffen them against flexing as the door is swung about its support. Both strips terminate in a fringed margin to accommodate the vertical rise of the lower boundary surface of the cut-out section as the door swings away from its closed position.

Abstract: A U-shaped frame is secured to a pair of spaced fence posts, and the frame has yoke members which secure the U-frame at the top and the bottom to the fence posts. A one-way gate or turnstile is provided by rotatable members on the U-frame having turnstile arms. A means of removably securing the U-frame to the fence posts is in the form of members securing the fence posts which can be manually tightened. The entire turnstile is designed to be readily removable from the fence line or readily insertable in a fence line; if the fence posts to which it is attached are weak, the U-frame tends to strengthen them.

Abstract: A counterbalance hinge mechanism for a cabinet lid includes a stationary cabinet affixed hinge rod serving to rotatably support a pair of axially stationary lid mounting cam members and to slidably support a pair of non-rotatable cam followers. An adjustable spring assembly serves to bias the cam followers into engagement with the cam members, whereby to counterbalance gravity induced torque effects of the lid throughout a substantial portion of lid opening movement.