Abstract: For producing security keys, in a first method step bore patterns differing from one another are produced, each bore pattern having the same number of bore locations. The corresponding bores are standard bores, which however may vary in terms of their bore depth. In a second method step, a prespecified number of selected bore locations in each bore pattern is varied in terms of their positions. In a third method step, each selected bore locations is additionally varied in terms of a prespecified number of bore shapes differing from one another.

Abstract: In rotary cylinder locks with spring-loaded, two-piece tumbler pins which are disposed radially to the lock cylinder and which interact with recesses 9, 10, 11 arranged in the side surfaces of flat keys 4, some of the recesses 10, 11 are disposed in steps. In this manner, one recess (for instance 10) shows differing control surfaces 10a, 10b, 10c, which can interact with differently disposed inner pins. By omitting some control surfaces (for instance 10a), auxiliary or single keys can be created, which can only position part of all inner pins of the same group. In this manner the number of differing locking possibilities of such locks can be multiplied.

Abstract: A double pin tumbler cylinder for a security lock in which a pin tumbler rotates in a cylinder housing. The cylinder housing is composed of an axial stack of discs punched from a sheet of chrome-nickel steel. The individual discs are soldered or welded together to constitute a rigid element. The discs have a tang portion in which an opening is made so that the assembled stack defines a channel for receiving a bar of chrome-nickel steel for additional reinforcement of the cylinder. The bar has an enlarged central portion with a threaded bore for receiving a locking screw.

Abstract: A ball retrieving and storage device for gathering balls lying upon a court floor or other flat surface and including a wheeled box-like collector having a bar extending across the front of the collector, the bar having a ball engaging surface which is normally carried above the floor at a height slightly less than the diameter of the balls to be collected so that when the device is moved over the floor and the bar contacts a ball, the bar is caused to ride across the top of the ball and trap it within the collector.

Abstract: A cylinder for a safety lock with a cylinder housing and a cylinder plug has tumblers made in the form of plug pins and housing pins. The tumblers are aligned by a key inserted into the lock. Each row of the housing pins is mounted with an associated pin spring in a respective separate chamber, the chambers being installed in respective recesses in the cylinder housing. The separate chambers are made in the form of sliders insertable in the axial direction in longitudinal channels in the cylinder housing, housing pins with their spring being guided in bores. The sliders are mounted so that they have axial play in the longitudinal channels.

Abstract: An espagnolette lock having an actuating nut which is rotatably supported in a lock box and in a lock box cover, which includes a rectangular through-aperture for receiving a rectangular arbor, and a slot formed in one side of the nut body of the nut for receiving the key bit of a cipher key. A sleeve is fastened to the lock box cover, which is adapted to extend into a circular aperture formed in the door or the like, and in which the sleeve is provided with guide slots and/or projections for receiving and securely fastening different types of actuating members or fittings for the lock, and their respective guide and covering sleeves.