Abstract: A releasable locking device for pivotally locking two members to one another. The locking device includes a hollow support assembly extending through an opening in one of the members. A locking member extends through a bore in the hollow support assembly and is formed with an enlarged locking portion insertable through an interior portion of an opening formed in the remaining member. The locking member includes a conically-shaped guidance surface for automatically aligning the enlarged locking portion with the interior opening in response to a biasing spring acting on the locking member.

Abstract: Supply and take-up reels are mounted above a horizontal base for selective powered rotation about respective vertical axes. Vertical guide surfaces and a cover panel define an air tight continuous flowpath extending between the peripheries of the reels past a read/write head. A blower mounted in a hood structure beneath the base sucks air through the flowpath and through a perforated center spool of the take-up reel. A river of air thus pulls and guides the free end portion of the magnetic tape from the supply reel to the take-up reel as the supply reel is rotated by a drive motor to unwind the tape therefrom. The supply hub is adapted to automatically center the supply reel thereon. The supply hub further includes a plurality of annularly spaced reel engaging pawls mounted in, and normally retracted into the hub, and an over-center actuating means for selectively extending the pawls through differential rotation of a pair of separate rotors included in the hub.

Abstract: A self-locking hinge for use as a pivotal connector between two pivoted members and adapted to lock the members in a fixed angular relation. The hinge comprises a pair of circular plates that are rigidly affixed to opposite faces of one member and rotatably connected to the other member. The circular plates are used to laterally support both of the members and to guide the other member as it is rotated from a folded position to a fully extended position. The hinge is locked in the fully extended position by means of a locking ring that is slidably engaged with the other member. When such other member is fully extended, the ring engages corresponding locking indentations at the periphery of the circular plates and thereby blocks the movement of the other member in one angular direction. The movement of the other member is blocked in the opposite angular direction due to the abutting of the hinge ends of the members.

Abstract: A brake assembly is disclosed in which a first pivoted lever receives and transmits brake actuating force to a second pivoted lever via tapered rollers. As the first lever is pivoted, a force is transmitted from a point which moves along the first lever to a point which moves along the length of the second lever so as to provide an increase in the mechanical advantage of both levers. In addition, the point of force application moves along the axis of each tapered roller to increase the rate at which the second lever moves to apply the braking force.

Abstract: This disclosure describes a reversible complex of antibiotic AV290 with an alkali metal alkyl sulfate and a process for preparing same. The complex is useful as an animal feed supplement which significantly enhances the growth rate of animals and poultry.

Abstract: A brake assembly is disclosed in which a first pivoted lever receives and transmits brake actuating force to a second pivoted lever via rollers which transfer force between the two levers at a point which, due to the geometry of the second lever, moves progressively closer to the pivot point of the first lever and farther from the pivot point of the second lever as force is applied to the first lever.

Abstract: A wheeled hand truck for barrels, drums, and similar heavy articles is disclosed which comprises a selectively pivotably load supporting foot plate and an adjustable barrel lip restraining hook which facilitate loading of barrels or drums onto the truck, the selectively pivotable load supporting plate also facilitating safe, compact storage of the device.