Abstract: A fire strip for a suspended grid ceiling has an inner spring steel web having a slightly arcuate cross section, and an outer web of soft steel wrapped around the inner web. A finished strip is formed by bending the strip normal to the strip body at both ends. When the ends are bent, a spring-like, yieldable, upwardly curved arch is formed which fits snugly against a panel when in place in a ceiling.

Abstract: A variable length fixation device for insertion into a hole formed in two or more bone fragments has a barrel portion and a fastener element. The barrel portion is secured to an inside surface of the hole in a proximal one of the bone fragments. The fastener element is telescopically mounted to the barrel portion and is extendable into a distal one of the bone fragments. The assembly prevents lateral movements of the distal fragment, relative to the proximal fragment, while allowing axial relative movements (i.e., linear movements along the longitudinal axis of the fastener element) to occur. In a preferred embodiment, the fastener element is a cannulated bone screw having a hex-shaped cross-section on one end which is telescopically received into a hex-shaped interior of the hollow barrel portion. The two components are preferably permanently joined to form a one-piece assembly having a variable overall length.

Abstract: The present invention is for a method of forming a seal in a prior art collapsible tube assembled in a prior art manner. A laminate seal is cut, positioned and held, and welded to the dispensing orifice of a rigid plastic head after the head is molded, but before it is assembled to the tube wall. The seal is protected during the welding of the wall to the head by the use of a heat sink.

Abstract: A safety lock for securing the end of a horizontal beam to a vertical post in a structural frame for wide span shelving. A tab on the end of the beam forces the side of an open box-shape post with slots in the side to yield during assembly of the beam to the post. When the tab enters a slot on the post side, the side springs back, locking the tab in the slot to prevent the dislodgment of the beam from the post.

Abstract: A compression leg that is applied to the hanger wire of a suspended grid ceiling. The leg is formed with a cross section having a portion intended to envelop the wire, and a channel portion that guides the leg into place about the wire. The leg is of rigid metal, and is crimped to the wire.

Abstract: A fire strip for a suspended grid ceiling has an inner spring steel web having a slightly arcuate cross section, and an outer web of soft steel wrapped around the inner web. A finished strip is formed by bending the strip normal to the strip body at both ends. When the ends are bent, a spring-like, yieldable, upwardly curved arch is formed which fits snugly against a panel when in place in a ceiling.

Abstract: A guide for a portable circular power saw for cutting wood at an angle. The guide has a circular stationary base which journals an outer member that carries guide tracks over the base. The outer member is rotated on the stationary base. The wood to be cut is supported on the base.

Abstract: A fire-resistant suspended ceiling grid structure having cross tees interlocked to main beams, to support ceiling tiles. The structure has shear means to permit a cross tee to expand into a main beam during a fire. The interlock includes tongues held in an abutting relationship by open belt loops. The tongues slide to permit the cross tees to expand longitudinally during a fire.

Abstract: A circular saw blade having shearing teeth and cleaving teeth in combination wherein the shearing teeth alternatively cut the fiber on opposite sides of the kerf, and the cleaving teeth separate out the sheared fiber. The saw cuts in either rotational direction.

Abstract: A clip for securing the top channel of a partition wall to a beam of a continuously extending suspended grid ceiling. The clip has a flat base and diagonally positioned hooks on the base. The clip is applied to the beam by rotating the hooks onto the beam flanges where the clip is locked in place by locking tabs on the base.

Abstract: Improved rigid grinding wheels are described which have a rigid organic matrix binding particulate diamond or cubin boron nitride abrasive uniformly dispersed therein between a plurality of spaced-apart apertures extending inwardly from the operative grinding surface of the matrix. The cross-sectional open area of the apertures in the matrix reduces the operative solid grinding surface and provides swarf relief while also increasing the effective concentration of a given amount of abrasive in the griding surface, this increasing the efficiency of the grinding wheel while reducing the cost of the wheel and power consumption in use.

Abstract: A hanger for an endless, continuously traveling conveyor for carrying articles on wire hooks through a spray paint field. The hanger has an upper element permanently attached to the traveling conveyor and a lower element easily removed and replaced while the conveyor is traveling, so that the holes in the lower element for the wire hanger hooks can be easily cleaned of encrusted paint.

Abstract: A fire strip for use in a suspended metallic grid ceiling structure. The strip extends between grid members in the ceiling. During a fire, the strip helps keep the grid intact, and keeps the ceiling tile in place, whereby the ceiling continues to act as a fire barrier.

Abstract: A fire-resistant suspended ceiling grid structure having cross tees and main beams, to support ceiling tiles. The structure has shear means to permit a cross tee to expand into a main beam during a fire. The shear means have a notch behind a transverse tab formed in the cross tee which acts as a stop against the main beam in normal conditions, and shears or bends during a fire to permit the cross tee to expand into the main beam and still hold the tile in place.

Abstract: A saber saw blade having shearing teeth and cleaving teeth in combination wherein the shearing teeth alternatively cut the fiber on opposite sides of the kerf, and the cleaving teeth separate out the sheared fiber. The saw cuts on both portions of the reciprocating stroke.

Abstract: A hydraulic elevator up direction control system is provided including a circulating valve connected between the supply and the return of a source that normally supplies pressure to the cylinder of an elevator controlled by a two position switchable setting valve that influences the pilot fluid pressure in the operating chamber of the circulating valve to control the size of opening of the circulating valve and thereby the volume of fluid passing through the circulating valve affecting inversely the volume of fluid passing through a check valve, to provide two distinctive intermediate up speeds of travel in addition to the nominal full speed of travel facilitating a fast, smooth and accurate ride of the elevator car as it approaches a stopping point relative to an upper floor of a building. A three speed down direction control system presents no problems of significance and is not dealt with.

Abstract: A two-wheeled convertible barrow vehicle adapted to, on one hand, be used in a conventional wheelbarrow manually operated fashion and, on the other hand, converted to and used as a trailer hitched to a power-operated vehicle. Conversion is achieved by the use of elements secured in brackets having bent portions which when secured on the frame of the barrow in one relationship provide diverging arms for manual operation, and when switched in the brackets result in a converging arrangement to provide a tow bar to be hitched to a power vehicle. The vehicle can be stored in a vertical position with the arms tucked underneath. The barrow of the vehicle can be selectively dumped with respect to the frame, or dumped in the usual wheelbarrow tilting arrangement.

Abstract: A device and technique for restoring the alveolar ridge of the human jawbone in the edentulous state. Such device involves an inert, porous tube which contains granules whereby when the device is in place on the ridge, tissue growth occurs from living bone through the porous tube inwardly or outwardly from the granular filler. The tube prevents the granules from migrating.

Abstract: In a suspended ceiling grid structure adapted to support ceiling tiles or the like, connecting apparatus between ceiling grid inverted T main and cross members disposed at right angles to each other and having upright central fins and bottom horizontal flanges comprise a tongue extending from each end of the cross members, a locking tab formed in the tongue of the cross members that is V-shaped in cross section and contacts the web of the main member when a cross member has been inserted through a slot in the main member, an opening in the tongue of the cross member that allows the locking tab to flex back when the cross member is inserted through a slot in the main member, a fingernail and fingernail interlocking pocket formed in each end of the cross member to interlock oppositely disposed cross members together and an interlock release pocket formed in the bottom of the fingernail interlocking pocket to disengage interlocked cross members without damage to either cross member.

Abstract: A dental implant system employing a root member which is fixed to the jaw bone. A post is also employed having a first portion fixed to the root and a second portion which extends outwardly from the alveolus of the jaw bone. A head is connected to the post second portion and is angularly disposed in relation to the post. The head is also movable relative to the post to provide various angular orientations for a crown which is fixed to the head.