Abstract: A pit disposed between an unsecured area and a secured area is normally bridged by a generally flat platform which normally forms a continuation of a roadway. The plate is pivoted at the unsecured side of the pit and is normally supported at the protected side by a weight-responsive removable or frangible support so that an unapproved vehicle will cause the support to give 'way and let the platform swing down and thereby entrap the vehicle in the pit. A plate at the protected side of the pit normally lies in the plane of the platform and functions as an extension thereof. When the weight-responsive support gives 'way and the platform swings down, the plate swings up and forms a blast shield across the path of the force of an explosion of a bomb in the entrapped vehicle. When an approved vehicle is to cross into the secured area a normally inoperative support is engaged with the platform so as to bypass the weight-responsive support.

Abstract: A vehicle barrier including a housing located in a pit, a barrier pivotally mounted on the housing and having a roadway surface and a barrier surface, hydraulic motors for moving the barrier from a retracted position where said roadway surface lies substantially flush with the roadway to an extended position where the barrier surface obstructs a vehicle on the roadway, energy absorbing members in the barrier, a break-away member effectively located between the barrier and the housing for permitting the barrier to pivot beyond its normal extended position when subjected to a vehicular impact above a predetermined value to thereby lift a vehicle off of the ground and throw it upwardly, and self-aligning structure between the barrier and the housing for effecting engagement between the hydraulic motors and the barrier upon installing the barrier into the housing.

Abstract: A vehicle barrier device is installed in a trench in a roadway. An impaler housing sits in a slot of a liner and supports a pivoting member in a slot in its top surface. The pivoting member has an impaling arm on its forward end, a massive counterweight at its rear end, and a pivot between them. One or more pins and an explosive bolt secure the impaling arm to the forward end of the impaler housing. When the device is remotely activated by security personnel, the bolt explodes, freeing the impaling arm. The counterweight is sufficiently massive so that the pivoting member tends to turn about the pivot under the force of gravity, thrusting the impaling arm above the surface of the roadway. The impaling arm projects at an angle toward a vehicle to be stopped, which is impaled by the arms.

Abstract: A road block for preventing unauthorized vehicles from entering a secured area comprises a pit, a span covering the pit, collapsible support members supporting the span at the trailing end of the plate with respect to the direction of vehicle access, devices for collapsing the support members, and a triggering mechanism for actuating the collapsing devices in response to the approach of an unauthorized vehicle.

Abstract: An underground shelter (1, 2, 3) for aircraft is equipped with a vertical door (5) mounted for swinging about a lower horizontal axis (X), the swinging movements of this door being controlled by means of external jacks (13), with axes inclined with respect to the horizontal, adapted to be retracted into pits (16) which are closable when the door is closed.

Abstract: An arm member rotatably mounted to the back of a horse trailer is positioned in a vertically extending orientation to permit a person to lead a horse into the desired stall space on the trailer, and an elongate actuating member, which is adapted to retain the arm member in the vertical orientation and which is operable from a location remote of the arm member, is actuated to cause the arm member to move to a generally horizontal orientation behind the horse. In one embodiment, the arm member is pivotally mounted to the back end of the trailer and the actuating member comprises an elongate rod slidably mounted to the trailer and adapted to retain the arm member in the vertically upward orientation yet, when slidably moved forward, it releases the arm member and permits the arm to rotate under its own weight until its free end is caught by a stop member which holds the arm member horizontally.

Abstract: A floor plate assembly, particularly suitable for use in and around rolling mills, comprises a closure floor plate which is arranged to close an opening adjacent another floor plate. The closure floor plate can move as required between a first position closing the opening and a second position under the other floor plate. The other floor plate is movable during the opening and closing operation to avoid obstruction of the closure floor plate.

Abstract: An assembly is provided for weather-sealing an elongated joint formed between a first member and a second member when said members are disposed at a predetermined relative position. The assembly includes an elongated piece having elongated interconnected first and second sections extending angularly relative to one another. The piece is removably carried by an elongated bracket fixedly secured to a side of one of the members defining the joint. The bracket is provided with an inner wall section, an outer wall section in spaced substantially face-to-face relation with the inner wall section, and a bridge section interconnecting a pair of corresponding elongated edges of the wall sections. The wall and bridge sections coact to form an elongated pocket having a first opening at one end. Corresponding second elongated edge portions of the inner and outer wall sections are disposed in spaced relation and define an elongated second opening having an end terminating at the first opening.

Abstract: An aircraft in which the fuselage and wings are configured in a blended wing design has a door opening in the fuselage adjacent the wing and a door assembly for closing the door opening. The door assembly includes a door having an exterior panel that conforms to the shape of the aircraft at the location of the door opening when the door is closed and having an interior structure configured in a series of steps. The door is movable between a closed position in which an upper edge of the door panel is adjacent an upper edge of the door opening and an open position in which the door panel lies substantially within the wing and in which the upper edge of the door panel is adjacent an upper surface of the wing and spaced from the fuselage. When the door is in the open position, the steps form a stairway leading from the fuselage up and out of the aircraft to the upper surface of the wing.

Abstract: A loading dock assembly adapted to be included in a building comprising an automatic control means for opening and closing the loading dock door, automatically raising and lowering the dock ramp to a proper position, as well as automatically turning on and off the dock light.

Abstract: An access cover frame for an underground station such as a pumping station is provided with a cleat connection for assembling a plurality of access covers to accommodate various size stations. The access cover frames are formed of members having a base and parallel sides which define an outwardly facing channel. Returned flanges are formed on said sides and cover a portion of the channel. A longitudinally extending cleat connecting member has grooves formed along the length thereof for receiving the returned flanges of juxtaposed frames thereby connecting said frames along the juxtaposed sides.

Abstract: A vehicle servicing system for permitting operators to service and maintain their vehicles. The system includes a housing having an upper and lower level. A vehicle is positioned on the upper level over a slideably moveable door. The operator then decends to the lower level and inserts monies into a moveable door mechanism. Actuation of the door mechanism slides the moveable door away, thus providing the operator access to the underside of the vehicle for a specific length of time. The operator may service the vehicle during the time access is provided. An automatic timing mechanism actuates the moveable door mechanism to close the door after the alloted time is used. Specific embodiments of the servicing system provide mechanisms for draining oil from the vehicles during service.