Abstract: Apparatus is disclosed for controlling die heads of screw-making presses having movable dies comprising a die head rotatably mounted on a shaft and having two dies, and a pivotally mounted controlling fork with a cam surface engaging the die head by rollers. The sections of the cam surface nearest to the pivotal axis of the fork are circular arcs centred on the pivotal axis while those sections of the fork which are farther from the pivotal axis and which engage the rollers are shaped as curves the distance of which increased from the pivotal axis in the direction of the working movement of the rollers. The circular arcs and the farther sections are connected by transitional sections.

Abstract: A reel on which seat belts are stored about a rotatable shaft. The reel includes spring means for retracting the belt and a ratchet tooth gear fixed for rotation with the shaft. Upon rapid unreeling of the belt off of the shaft, means which may be inertia responsive activates a pair of lockbars to engage the ratchet tooth gear and stop its rotation. Each lockbar includes a pawl tip and when one of the pawl tips is radially aligned with one of the tooth tips on the gear, the other of the pawl tips is aligned midway between a pair of adjacent gear teeth. When the lockbars are moved into engagement with the ratchet tooth gear, the combination of the two pawl tips and their orientation with respect to the teeth of the gear assures that at least one of the tips will be in proper position to engage the tooth gear should the other tip break off or not engage upon contact with the gear. Differential lever means may be provided for moving the pawl tips into engagement with the gear.

Abstract: A safety belt retractor is provided having a frame, a shaft extending transversely of the frame and journalled for rotation thereon, a reel fixed to the shaft and having one end of a strap secured to the shaft and wound about the reel, the other end of the strap extending outwardly of the frame and means for rewinding the strap onto the reel. At least one ratchet tooth gear is mounted on the shaft and rotatable therewith and a lockbar is also mounted on the frame and has at least one locking pawl adapted to engage the teeth of the gear, the lockbar being movable between positions engaging the teeth and out of engagement therewith. Means are provided for moving the lockbar into engagement with the teeth of the ratchet tooth gear and releasing the lockbar from engagement with the teeth of the ratchet tooth gear upon rewinding of the strap back onto the reel.

Abstract: A lightweight preformed environment resistant display block adapted to provide a display means of a plurality of like modular display blocks for exhibiting various articles in a number of different display arrangements. A modular display block of integral homogeneous polyhedral hollow form including side walls, a bottom wall, and a top wall located below top edges of the side walls to provide a pocket or cavity for holding displayed articles. Means are provided on said bottom wall and on edges of said side walls for interlocking modular display blocks in a number of different display arrangements.

Abstract: An electrolysis unit is used in conjunction with the holding tank of a self-contained recirculating toilet system. The liquid and solid waster material is macerated and recirculated by an external macerator pump as a fine slurry. The slurry material from the lowermost portion of the waste tank is treated by electrolysis producing oxygen and chlorine and an odor free water vapor exhaust. The residue from the electrolysis decomposition unit is periodically removed.

Abstract: A bearing system for relatively rotatable liquid conduits such as a rotating sprinkler head mounted on a fixed riser, including a two-piece casing assembly for shielding operative parts of the bearing from intrusion of external dirt and water-borne abrasive material, while permitting leakage liquid within the casing assembly to bleed outwardly, thereby preventing excessive liquid pressure in the assembly. The illustrative system includes a bearing housing having a central vertical bore and a tubular spindle rotatably mounted in the bore and projecting thereabove for attachment to a sprinkler head. The system includes spaced upper and lower seals between the fixed and rotating parts, and an external helical spring for maintaining the seals under compression, thereby minimizing entry of outside dirt and water-borne abrasive material into the annular space between the spindle and bore.

Abstract: A reel on which seat belts are stored about a rotatable shaft. The reel includes spring means for retracting the belt and a ratchet tooth gear fixed for rotation with the shaft. Upon rapid unreeling of the belt off of the shaft, means which may be inertia responsive activates a pair of lockbars to engage the ratchet tooth gear and stop its rotation. Each lockbar includes a pawl tip and when one of the pawl tips is radially aligned with one of the tooth tips on the gear, the other of the pawl tips is aligned midway between a pair of adjacent gear teeth. When the lockbars are moved into engagement with the ratchet tooth gear, the combination of the two pawl tips and their orientation with respect to the teeth of the gear assures that at least one of the tips will be in proper position to engage the tooth gear should the other tip break off or not engage upon contact with the gear. Differential lever means may be provided for moving the pawl tips into engagement with the gear.

Abstract: A multi-purpose vehicle for transporting material in bulk form such as trash, waste, and rubble or in packaged form such as, boxes, containers, pallet loads, and the like. An elongated walled vehicle body having a floor, an anti-friction surface on the floor, and twin side by side endless belts of reinforced neoprene, each having a top lay movable under load along said anti-friction surface and a bottom lay extending beneath the floor in engagement with a plurality of drive rollers. The drive rollers include two horizontally spaced rollers and a third roller spaced below and between the two rollers, the horizontally spaced rollers being spaced apart less than the diameter of the third roller therebeneath. A motor means carried beneath the floor drives through a common drive portion the set of three drive rollers for each belt.

Abstract: In an emergency locking safety belt retractor, a locking bar is operated by inertia responsive means which includes an inertia responsive mass and a locking bar for locking with teeth of the ratchet wheel associated with the belt winding wheel of the retractor. The inertia responsive means has been improved by the provision of having resilient means in force transmitting relation between the lock bar and the mass for receiving and storing energy imparted thereto by movement of the mass and for thereby urging the lock bar toward locking engagement with the ratchet wheel through a pawl bounce condition. The pawl bounce condition is defined as the condition that occurs when the lock bar initially bounces off the tooth of the lock wheel before attaining a locking engagement with the wheel. The resilient means may take the form of several different embodiments. In one embodiment, an actuator is mounted between the mass and the lock bar.