Abstract: An electromagnetic shield-type doorway for a building is provided with two doors having a curved passageway between them. By lengthening the passageway to such an extent that the two doors cannot be opened simultaneously, electric waves can be blocked at either of the doors. The electromagnetic shielding effect can be enhanced by installing a revolving door in the passageway and attaching electrically conductive brushes to at least the lower edge and one side edge of the revolving door to fill the gaps at these edges. In a system for electromagnetically shielding a building, a doorway passageway of the building is partitioned by three or more doorways each having an electromagnetic shielding function. When persons leaving and exiting a building simultaneously approach entrance and exit doors at the ends of the doorway passageway so that these doors open at the same time, the central doorway remains closed to maintain the integrity of the electromagnetic shield.

Abstract: A rapid deployment surveillance vehicle is disclosed for detecting illegal immigration across national borders and the like. An off-the-road vehicle (V) is equipped with a rapid mast erection/retraction assembly (A) which includes a carriage mechanism (24) which carries a telescoping mast (12). A track mechanism (20) slidably carries the carriage mechanism (24) by means of a fixed support (22) and pivoting support arms (26). Ram air cylinders (52, 54, 56) move the carriage mechanism in translational and rotational movement as guided on the track mechanism in a manner that the mast (12) is moved from a stowed horizontal position to an erect vertical position. During erection of mast (12), a longitudinal roof opening (10) is opened by means of a main door (14) and displacement door (16) in an automatic manner. Once erect, a leveling system (B) checks to ensure that the vehicle is within one degree of level.

Abstract: A housing construction comprising a first unit enclosing at least a kitchen, living/dining/bath and sleeping zones, a second unit enclosing at least a kitchen, storage, and laundry facilities with high heat, noise and or pollutant producing characteristics connected by or separated by a confluence of passageways lying between the first the first and second units to connect these units or alternatively to separate these units by forming sealed passageways between other parts of the housing construction to thus permit exchange of or exclusion of warm or cold air, restrict noise, direct or control traffic, and/or provide increased security as required to produce more security comfort and convenience for the occupants and house guests in the most economical and efficient manner.

Abstract: An improved transfer chamber for a space vehicle has an enclosure mounted on the hull of a spacecraft, and is provided with inner and outer doors. Two bladders are placed within this transfer chamber, and are selectively movable toward and away from one another. Conduits communicate these bladders with an outer reservoir exposed to space pressure, and with an inner reservoir exposed to cabin pressure. The conduits, bladders and reservoirs are all filled with liquid. When it is desired to egress an object from the cabin to space, liquid is pumped into the bladders, which move toward one another and deform about the object. This reduces the volume of air which is lost to space when the outer door is opened.

Abstract: A negative pressure method and apparatus for protection from airborne asbestos and other particulate contamination is disclosed, including an enclosure with doorways and decontamination chambers with an air intake through the decontamination chambers with at least one filtration unit flow connected with the enclosure, with a blower to pull air into the filtration unit and dispelling the filtered air to the atmosphere. A high volume air flow intake is maintained with a significant negative air pressure in the enclosure. A filtration device is provided with multiple entrance ports providing for a large flow of air through the body of the room together with individual entrance ports to receive the discharge from separate vacuum cleaners.

Abstract: A security enclosure for use with an existing door frame which is within a wall having first and second sides and extending upwardly from a base. A first door is hingedly connected to the door frame and includes a second portion which is capable of latching to the door frame. Between the first and second portions is a third portion which extends outwardly from the door and includes a ceiling. A second door of like construction is placed on the second side of the wall within the door frame to form a security unit.

Abstract: Door control apparatus is provided for opening and closing the passenger doors of a transit vehicle and the cooperating doors of a station, which apparatus includes conductors respectively coupled with a station power supply and the station door motors and extending along the station platform where passengers load and unload relative to the vehicle, such that a shunt connection member carried by the vehicle and coupled with the vehicle door motor is operative to energize the vehicle door motor and the station door motor for operating the passenger doors and the station doors when the vehicle is positioned at the station platform to load and unload passengers in relation to the vehicle.

Abstract: A security door and system for installation as the entrance and exit to a building or office to automatically control the passage of persons therethrough and to trap certain persons therein comprising a vestibule having side walls and oppositely disposed doors which open and close automatically under the control of photocell detectors and time delay relays. The photocells energize motors which open a respective door through which the person may enter the unit. After a predetermined time delay the opposite door opens. An emergency switch is provided to override the automatic control so that a person can be trapped and detained within the vestibule if desired or necessary.

Abstract: The present invention relates to a protective entranceway contained in the outer door of a van, trailer or other shelter means. In one mode our device takes the form of a door operable about a vertical hinge line, and although thicker than an ordinary door, it serves in the manner of an ordinary door to provide closure for the shelter means at such time as no contamination is present. A platform is contained on the outer portion of our door, which is enabled to swing downwardly at the time of a contamination alert. A canopy that had been contained in the door in a folded condition is caused by downward movement of the platform to deploy and form a closed entranceway serving in a second mode of use to prevent contaminated air from entering the shelter means.

Abstract: A loadlock apparatus for a workpiece processing chamber such as those incorporated in vacuum processing systems. The apparatus includes an isolation chamber having evacuation apertures and workpiece transfer apertures with independently operable doors for closing and sealing the workpiece transfer apertures and an independent operable workpiece transfer mechanism. The doors and workpiece transfer mechanisms may be contained within the isolation chamber and the chamber may be closed and sealed while containing a workpiece. The door and workpiece transfer mechanisms may be adapted such that they are not positioned over the workpiece, thereby reducing the possibility of workpiece particulate contamination.The preferred embodiment of the workpiece transfer mechanism moves a workpiece through the isolation chamber along a path which is essentially a straight line.

Abstract: A security transfer unit has a cashier's door and a customer's door for providing access to an intermediate transfer chamber from opposite sides of a security screen. Only one of the doors can be opened to give access to the chamber at a time, opening of the cashier's door being normally obstructed by a pivotted bar that is swung down across the door to engage a bracket. Swinging of the bar up to remove the obstruction turns a shaft to block, via a cam, withdrawal of catch-bolts which hold the customer's door closed. The cam in this condition also abuts a block mounted on the rear edge of the door such that if the customer's door is open as the bar is swung up it will be forced closed before the cashier's door can be opened.

Abstract: A closable passage arrangement interconnecting two spaces and comprising a closure unit having two passage openings each provided with a door or the like lockable with a locking bolt mechanism. Each door connects the closure unit to a different one of the two spaces. The doors are provided with driving means for their operation. The driving means comprises, for each door, a power transmission unit arranged to influence separately a mechanism for turning the door and a mechanism for operating the locking bolt mechanism of the door. The power transmission units of the doors are interconnected by means of a common shaft. The power transmission units include a pin-and-fork mechanism, wherein a rotatable power transmission member provided with crank pins or the like cooperates with a number of fork members. The driving means comprises a plurality of door operating stations each including a door operating member being directly or by means of the common shaft connected to the power transmission units.

Abstract: An air lock has a chamber and a pair of doors in respective walls of the chamber. Operators associated with the doors include closers normally biasing the doors to closed positions and fluid powered openers associated with the closers capable of overriding the bias of the closers. A control system, operation of which may be initiated by initial opening displacement of one of the doors or (in one embodiment of the invention) by manually operable remote switch means, provides for opening of one of the doors and latching of the other to prevent simultaneous opening of both doors. The latch means for the doors may be overriden by direct displacement of the doors for safety purposes. The control system also triggers air handling apparatus associated with the chamber.

Abstract: This invention is a method and an apparatus by which a barrier is automatically placed before partially opened doors, which barrier is automatically removed when the door is fully opened and safe for travel. The invention includes means to detect when the door is fully opened and thereupon to activate barrier removal means, together with barrier placement means automatically activated at any time when the door is not fully opened.

Abstract: A personnel air lock has a transfer chamber that is separated from an atmospheric region by an outside door and is separated from a containment region by an inside door. A single drive shaft couples a motor and three clutch-operable hand wheels to the doors to sequentially open and close one door and then the other. Each door is opened and closed through a door actuator linkage that is coupled to the drive shaft through a respective dual clutch and a respective clutch-actuating mechanism. One door-opening clutch is engaged as a lead screw nut moves through an active range along a timing lead screw, while another door-opening clutch is disengaged as an associated lead screw nut moves through an inactive range along another timing lead screw, so that only one of the doors is coupled to the drive shaft at a time. Each lead screw nut forms part of a slide indicator for indicating the operating position of its associated door.

Abstract: A portable door covering device for placement inside or outside a door leading to the outside of a building, said device being so placed as a permanent or temporary structure during colder months in order to minimize the escape of the heat contained indoors to the outside areas. The device is comprised basically of a semicylindrical member of hollow disposition, said member being open on the one side thereof for placement against the walls near the door area, and the other side being enclosed and equipped with a conventional door to allow access to areas inside the door covering device.

Abstract: An article vending machine, said machine having an article delivery chute, and an article delivery opening at the lower end of such shute, and a door for closing such opening, in which the improvement comprises a chute closure operable to close the chute and being moveable between chute closing and chute opening positions, and having linkage extending between the door and the chute closure whereby opening of the door automatically procures movement of the chute closure.

Abstract: A high speed ground transportation system, is suspended in an underground vacuum tube by a frictionless magnetic suspension system and propelled by gravity. The tubes are suspended inside deep underground tunnels from anchor points near each adjacent station and follow smooth catenary curves similar to the main suspension cables of a suspension bridge. Gravity propulsion is accomplished by allowing the vehicle to coast down the descending arc of the tube, during which time it is accelerated by gravity, and decelerating by gravitational braking while coasting up the tube's ascending arc. Thus, the trip is accomplished by transforming the vehicle's gravitational potential energy at one station into kinetic energy and back into gravitational potential energy at the next station. Excess kinetic energy arising from coasting between stations having different elevations is supplied or absorbed by on-board linear motor/generators that provide supplementary propulsion or regenerative braking.

Abstract: The disclosure relates to a paint spray system and specifically to a novel part gaging apparatus and spray head positioning system. The paint spray system comprises a spray housing, conveyor means to transport a workpiece to be painted through the housing, and spray head means mounted on a movable positioner adjacent the housing and extending into the interior of the spray housing. The part gaging apparatus includes a part sensing element positioned adjacent to the conveyor means and displaceable to contact a workpiece being conveyed to the spray housing. The part sensing element is mechanically connected to a position memory apparatus and operates the position memory apparatus in accordance with the distance the part sensing element is displaced. The displacement information is appropriately related to the width of the workpiece and establishes the proper forward position to be occupied by the spray heads of the coating system.

Abstract: A rapid transit system in which a vehicle, typically consisting of a train of detachably coupled cars, is suspended in a vacuum tunnel with at least two sloping reaches from a ferromagnetic monorail of high resistivity by magnetic attraction and propelled by gravity. Servo-controlled electromagnets allow the vehicle to be suspended from the rail without actually being in contact with it or any other part of the tunnel. Propulsion by gravity from one station to the next is accomplished by allowing the vehicle to coast frictionlessly down one sloping reach of the tunnel during which time it is automatically accelerated, leveling off at the horizontal reach at some cruising depth where it coasts along at an essentially constant maximum speed, and then moving up the next sloping reach toward the second station during which time it is automatically decelerated, and finally stopping at the station where the original elevation is reached.

Abstract: A transfer-chamber two-door interlock security device includes a rocker arm which can be rocked between first and second door locking positions. If the rocker arm is in a first-door locking position and the second door is opened, a latch flange on the rocker arm engages an edge of the open door to thereby prevent the rocker arm from rocking.

Abstract: A tunnel autoclave having guillotine doors at opposite ends has sections of rail fixed to the said doors so as to be aligned with guide rails extending through the said autoclave when the doors are in the open position.

Abstract: The passage comprises two successive gates, maneouvrable in rotation in a single direction and conjugated to one another so that initially one is closed and the other open. These gates are sufficiently close to one another so that, on the opening of the first by a passenger arriving in the normal direction, the other closes thereby resisting the passage of a defrauder in the opposite direction.

Abstract: An entry lock for controlled ingress and egress for confined areas such as live animal growing and holding pens is disclosed. The entry lock includes a door opening, first and second doors spaced apart from each other and adapted to swing together about a common axis positioned at a side of the door opening into alternate register with the door opening, and a third door hingedly attached approximate the outside edge of the first or second door and latched approximate the outside edge of the other of the first or second doors forming a confined area or enclosure large enough to accomodate a human. The enclosure is formed by the third door in conjunction with the first and second doors. The structure prevents ingress and egress through the door opening when the first and second doors are swung together into alternate register with the door opening.

Abstract: A platform structure for maritime installations, designed to rest under its own weight upon the seabed through the medium of a base acting as the foot of a tower surmounted by an emergent superstructure, comprising a strong, watertight tubular member incorporated into the structure in order to form a shaft or chimney extending from top to bottom of the structure in order to protect the components of the installation against corrosion and shock loading, and in order also to make it possible to carry out in the dry the various operations required by the process. The tubular member can be used without a base in order to give direct access to the seabed. Preferentially, the tubular member will communicate with one or more radial, watertight tunnels formed in the base.