Abstract: A door locking and unlocking safety mechanism comprising a push mechanism actuator structure to be carried by the door; a single rod operatively connected with the push mechanism to be displaced by operation of the push mechanism; door latch mechanism operable to latch and unlatch the door in response to movement of the single rod; and temperature response blocking structure associated with the latch mechanism to block operation of the latch to unlatch the door, in response to a predetermined increase in ambient temperature.

Abstract: An electrical release door strike comprising a carrier frame; a strike bolt carried by the frame for movement when released, allowing door opening, the bolt adapted to receive and resist door opening force prior to bolt movement; a solenoid carried by the frame to have either of two alternate positions relative to the frame; and structure operatively connected between the solenoid and bolt in either of the positions to cause the bolt to assumei) a fail safe condition when the solenoid is in one of the positions,ii) a fail secure condition when the solenoid is in the other of the positions.

Abstract: An apparatus for selectively controlling endwise movement of two control members comprising first structure including body structure supporting the members for selective endwise movement thereof; actuator structure coupled to the members for selectively moving the members endwise; and lock structure selectively movable into locking relation with the members to selectively block endwise movement thereof.

Abstract: A transmission control system wherein a selector is movable between multiple positions to control the transmission, there also being brake structure having ON and OFF positions, and a valve unit to control application of pressurized fluid to the brake structure to effect brake movement between the ON and OFF positions, an actuator for the transmission movable between multiple positions corresponding to the selector positions; structure operatively connected with the actuator, the selector and the valve unit toi) cause the valve unit to pass fluid pressure transmission to the brake structure when the selector is in a first position, andii) cause the valve unit to block fluid pressure transmission to the brake structure when the selector is in at least one other of the multiple positions.

Abstract: A control mechanism to control endwise displacement of first and second output member in response to variable positioning of an input member, comprising a frame; a first pivotal part carried by the frame to pivot about a first axis, the first output member connected to the first part; a second pivotal part carried by the first part to pivot about a second axis, the second output member connected to the second part; a control handle connected to the second pivotal part to pivot with the parts and to control pivoting thereof; guide structure on the frame to guide the pivoting of at least one of the handle and parts; and lock structure on the frame to releasably lock the one of the handle and parts in a lock position to which it is pivotally movable by the handle in response to guiding by the guide structure.

Abstract: An electrical release door strike comprising a carrier frame; a strike bolt carried by the frame for pivoting when released, allowing door opening, the bolt adapted to receive and resist door opening force prior to the pivoting; structure carried by the frame to release the strike bolt for such pivoting, including first, second and third arms; the first arm movable from a first position blocking bolt pivoting to a second position allowing bolt pivoting to in turn allow the door opening, the second arm movable from a primary position in which it holds the first arm in the first position to a secondary position in which it allows the first arm movement to the second position, and the third arm movable from an initial position in which it holds the second arm in the primary position to a subsequent position in which it allows movement of the second arm to the secondary position; and additional structures including an element carried by the bolt and movable relative thereto to signal the presence of a door part a

Abstract: A mechanism actuator comprising a frame; a lever movable to actuate mechanism associated with the frame; a dog movable into and out of blocking relation with lever movement; and structure for selectively holding the dog in either of two positions between which it is movable, the dog in one of the positions blocking lever movement, and the dog in the other of the positions unblocking lever movement.

Abstract: Apparatus for transferring door opening or closing motion, in response to displacement of a door handle, comprises a mounting structure; the door handle carried by the mounting structure for push or pull displacement toward or away from the mounting structure; a rotary output element carried by the mounting structure; and motion transfer elements operable between the handle and the output element to effect rotation of the output element in response to the displacement of the door handle.

Abstract: An electrical release door strike includes: a carrier frame; a strike bolt carried by the frame for pivoting when released, allowing door opening, the bolt adapted to receive and resist door opening force prior to said pivoting; structure carried by the frame to release the strike bolt for such pivoting, including first, second and third arms; and the first arm movable from a first position blocking bolt pivoting to a second position allowing bolt pivoting to in turn allow door opening, the second arm movable from a primary position in which it holds the first arm in its first position to a secondary position in which it allows first arm movement to its second position, and the third arm movable from an initial position in which it holds the second arm in its primary position to a subsequent position in which it allows movement of the second arm to its secondary position.

Abstract: Apparatus for transferring door opening or closing motion, in response to operation of a door handle, comprises: a mounting structure; first, second and third elements carried by the mounting structure for movement relative thereto, the first and third elements coupled to the second element, the second element carried for bodily movement in response to movement of the first element by the door handle, the third element being rotatable in response to bodily movement of the second element; a rotary output element connected to the third element; the second and third elements having alternative coupling positions characterized in that in one position the output element is rotated clockwise when the handle is operated in either direction, and in the other position the output element is rotated counterclockwise when the handle is operated in either direction; and the second element being in the form of a slider coupled to be displaced linearly by the first element when the handle is operated.

Abstract: A door latching or unlatching push bar apparatus comprising: a mounting rail means to be carried by the door, the rail means having a locking rail; a push bar mounted for advancement and retraction relative to the rail means; support means carried by the push bar to extend toward the rail means, and a lock arm carried by the support means to be movable into and out of dogging position relative to the locking rail; and an actuator carried by the push bar and operatively connected with the lock arm to move the lock arm into and out of dogging position when the push bar has been advanced toward the rail means.

Abstract: Door lock control apparatus includes a rotary input part adapted to be rotated by a handle or knob; a rotary output part adapted to operate a lock mechanism; and structure coupling the input part to the output part, including a pinion gear coupled to the output part; a member having first and second lengthwise extending racks thereon and bodily shiftable between a first position in which the first rack engages the pinion, and a second position in which the second rack engages the pinion, that member also being bodily movable in the length direction of the racks; and a mechanism operatively coupled between the input part and the member to have that member in the length direction in response to rotation of the input part; the racks located to alternately engage the pinion in such first and second positions so that in the member's first position the output part is rotated clockwise when the input part is rotated clockwise, and in the member's second position the output part is rotated counterclockwise when the i

Abstract: An electrical release door strike includes: a carrier frame; a strike bolt carried by the frame for pivoting when released, allowing door opening, the bolt adapted to receive and resist door opening force prior to said pivoting; structure carried by the frame to release the strike bolt for such pivoting, including first, second and third arms; and the first arm movable from a first position blocking bolt pivoting to a second position allowing bolt pivoting to in turn allow door opening, the second arm movable from a primary position in which it holds the first arm in its first position to a secondary position in which it allows first arm movement to its second position, and the third arm movable from an initial position in which it holds the second arm in its primary position to a subsequent position in which it allows movement of the second arm to its secondary position.

Abstract: Apparatus for transferring door opening or closing motion, in response to rotation of a door handle, and comprises: a mounting structure; first, second and third elements carried by the mounting structure for movement relative thereto, the first and third elements coupled to the second element, the second element carried for bodily movement in response to rotation of the first element by the door handle, the third element being rotatable in response to bodily movement of the second element; a rotary output element connected to the third element; and at least two of the first, second and third elements having alternative coupling positions characterized in that in one position the output element is rotated clockwise when the handle is rotated clockwise, and in the other position the output element is rotated clockwise when the handle is rotated counterclockwise.

Abstract: A door lock structure includes a frame and a latch bolt carried by the frame for movement between retracted and advanced positions relative to a jamb. The bolt in its retracted position allows the door to open and when its in its advanced position blocks the closed door from opening. A first heat-fusible spring carried by the frame urges the bolt toward the advanced position. A lever pivotally carried by the bolt pivots between a first bolt blocking position and a second bolt freeing position. The lever has a second heat fusible spring carried by the bolt and acting on the lever for urging the lever toward the first bolt blocking position. The frame carries an actuator for pivoting the lever into the second position allowing movement of the bolt toward the retracted position. The lever also has a counterweight on the lever for keeping the lever in the first position to block retraction of the bolt in the event that the first and second springs melt.

Abstract: A mullion assembly for a door unit is adjustably attachable to support structure via a connector part. The assembly includes:(a) an elongated upright million member having T-shape in horizontal cross section, and(b) a foot bracket at an end of the mullion member and being adjustable for connecting the bracket to support structure so that the bracket can be shifted horizontally relative to the connector part fixed to the support structure, and then attached to that part,(c) the foot bracket having T-shape in horizontal cross section to interfit the T-shape of the mullion for blocking sideward motion of the mullion relative to the bracket.

Abstract: Apparatus deadlocking a door member to a door frame member, one of the members rigidly supporting a bolt to project freely in the direction of a first axis, for captivation by said mechanism, comprises:(a) a body attachable to the other member,(b) a rotary latching structure carried by the body to pivot about a second axis generally parallel to the first axis, the latching structure including a latch forming a recess to relatively receive the bolt as the members relatively close and so that the bolt pivots the latch about the second axis into full latching position, therby to deadlock the two members,(c) a confinement wall on the body to face and confine the bolt in the recess in full latching position,(d) the latching assembly including a latch dog,(e) and a blocking and unblocking part extending in co-operation with the body and movable from a first location in which the latch dog is blocked to prevent pivoting of the latch to release the bolt, to a second location in which the dog is unblocked, to allow la

Abstract: A door retention assembly locks a door in closed position in response to high temperature as during a fire, the door element having an edge portion closable into adjacent relation to an edge portion defined by a header element, and there being a strike carried by one of the elements. The assembly includes:(a) a latch carried by the other element to relatively move into latching relation with the strike when the door element is closed relative to the header element, thereby to hold the door closed,(b) and a control to control movement of the latch into and out of latching relation with the strike. A heat fusible part, when fused, renders the control inoperable to effect movement of the latch out of latching relation with the strike.