Abstract: An adjustable tensioning arrangement for modular security door systems has modular components interchangeable for use on either side of the door system, thereby reducing significantly the number of parts which must be manufactured for the door. The adjustable tensioning arrangement is capable of accommodating a variety of tensions desired by individual users. The adjustable tensioning arrangement may be produced with a minimal number of required parts, and at very low cost. Construction of the adjustable tensioning arrangement may incorporate readily fabricated steel components, or utilize injection molded or other plastic type materials.

Abstract: A roll-up or curtain type door or panel wall for use in large doorways, the door having an improved support apparatus, an improved spring mounting mechanism, and a unique bearing block which also functions to support the door as it is rolled up. The roll-up door has a substantially stronger hollow hexagonal barrel assembly which is less susceptible to flexural stress, and a spring mounting arrangement which allows the springs to shrink or grow longitudinally as the door is rolled up or down. The barrel assembly is mounted on pivoting support means allowing the barrel assembly to move away from and toward the guide tracks as the door is rolled up and down, whereby the variation in diameter of the barrel assembly does not affect the performance of the door.

Abstract: A roll-up or curtain type door is disclosed which is for use in large doorways, the door having an improved support apparatus, an improved spring mounting mechanism, and a unique bearing block which also functions to support the door as it is rolled up. The roll-up door has a substantially stronger hollow hexagonal barrel assembly which is less susceptible to flexural stress, and a spring mounting arrangement which allows the springs to shrink or grow longitudinally as the door is rolled up or down. The barrel assembly is mounted on pivoting support means allowing the barrel assembly to move away from and toward the guide tracks as the door is rolled up and down, whereby the variation in diameter of the barrel assembly does not affect the performance of the door.

Abstract: A roll-up or curtain type door is disclosed which has modular components which are interchangeable for use on either side of the door, thereby reducing significantly the number of parts which must be manufactured for the door. The number of hardware items is also reduced significantly by designing components which slide together in a secure locking fashion, resulting in better ease of assembly and installation. In one embodiment, the roll-up door of the present invention is used to secure a storage unit with shelves.

Abstract: A security door system using a roll-up door fabricated of curtain sections reinforced by extruded metal cross beams. The system is designed for installation in a closet doorway or the like to provide security for valuables which may be stored in the closet or to keep dangerous implements, such as guns, away from children in a household, and the like. The door has a slide lock with a re-lock assembly for back up in the event that the primary key lock is broken. The door is designed for shipment in kit form and includes a number of door track sections with mating splices for joining the sections together. The design and construction of the system provide a low cost solution to the problem of developing secure storage within a residence, school, business establishment or the like in a unit which is aesthetically pleasing in design and is inexpensive to purchase and install.

Abstract: A security door system using a roll-up door fabricated of curtain sections reinforced by extruded metal cross beams. The system is designed for installation in a closet doorway or the like to provide security for valuables which may be stored in the closet or to keep dangerous implements, such as guns, away from children in a household, and the like. The door has a slide lock with a re-lock assembly for back up in the event that the primary key lock is broken. The door is designed for shipment in kit form and includes a number of door track sections with mating splices for joining the sections together. The design and construction of the system provide a low cost solution to the problem of developing secure storage within a residence, school, business establishment or the like in a unit which is aesthetically pleasing in design and is inexpensive to purchase and install.

Abstract: An inexpensive, modular, partition system is provided by panels which include a generally rectangular body and connector members on opposed sides of the body and integral therewith. Each connector member includes female and male elements joined together by a stop element which is generally perpendicular to the body. The panels may be connected to one another to form a wall by either an abutting type or overlapping type connection. In the abutting type connection, one connector member of one panel interlocks with a connector member of the other panel and the female and male elements come into mating engagement with each other, with the stop elements of each member abutting each other. In the overlapping type connection, the ends of adjacent panels overlap each other and the male elements of each connector member are secured to the body of an opposing panel.

Abstract: Tamper-free exterior lock apparatus to affix to a door for maintaining latched engagement to the door's frame. Two sets of shackles, one pair fixed to a backing plate and the other insertable with respect to a lock housing, engage, respectively, a primary lock and a secondary lock so that no portion of the shackle is exposed when coupled with its lock. Primary lock guards protrude from the lock housing to restrict access to the primary lock. A slide bar having a latching portion at one end and a lip portion oriented perpendicular to the main portion of the slide bar at the other end is maintained in slidable relationship to the backing plate and housing to allow the movement of the lock apparatus from its latching position to its open position and to block the slide bar from movement when either or both of said locks is engaged to its set of shackles.