Abstract: A self-drilling screw having an elongated threaded shank with a driving head at one end and a drilling body portion at its other end formed with longitudinally extending flutes located substantially on opposite sides of the body, these flutes defining rectilinear tip and side cutting edges positioned along opposite sides of the body, the tip-cutting edges being forwardly offset and angularly diverging from the ends of a transverse cutting edge, formed on a tip web, to diametral opposite points on the body providing a transverse width at least equal to the root diameter of the threads on the shank, and at which points the tip-cutting edges connect with the side-cutting edges which are angularly inclined towards their outer ends in a rearward direction circumferentially of the body and in a radially inwardly direction of said body.

Abstract: Our invention relates to a wheeled fertilizer or other granular material spreader which is pushed over the area or surface to be treated. The granular material is dropped through feed openings onto the surface to be treated, the metering of the granular material being accomplished by placing the metering blade in a desired position or positions depending upon what particular granular material is being discharged from the hopper.

Abstract: A powder dispersing device having an open ended container adapted to contain a powder, a diaphragm movable toward and away from the open end of the container whereby the powder is agitated and air is caused to flow into an annular outlet passage, there being venturi openings between the interior of the container and the outlet passage whereby the powder is sucked into the outlet passage and caused to flow outwardly therefrom in the form of a powder-in-air dispersion.

Abstract: A wheelchair which has a seat, back and foot and leg supporting structure in which there are main and auxiliary wheels for supporting the body of the wheelchair when it is operating on a substantially level or smooth surface and in which there is climbing and descending means in the form of a flexible and pliable wheel which is brought into operating position when it: is desired to climb or descend a staircase, or when the wheelchair is moving over a very rough surface.

Abstract: Our invention relates to a wheeled fertilizer spreader which is pushed over the area which is to be fertilized or chemically treated and in which the fertilizer, chemical or other granular material is broadcast by being dropped onto a horizontal impeller which rotates on a vertical axis and throws the material outward horizontally in a frontal direction.

Abstract: A protection device for use on machines which are hand-fed, for protecting the machine operator from accidentally and inadvertently moving his hands inwardly into the entrance opening of the machine for precluding the possibility of injury to the hands or arms. The device provides a plurality of safety devices connected to an electric circuit which feeds the operating motor and the operation of any one of these safety features will stop the machine.

Abstract: A portable positive feed drilling device in which there is a spindle carrying a cutting tool with means for rotating the spindle and the cutting tool in order to perform a cutting operation on the work, and in which there is a normal speed spindle feed means and a rapid advance spindle feed means, either of which may be caused to feed said spindle toward said work.

Abstract: A panic exit actuator and locking mechanism adapted particularly for mounting on a narrow stile door frame with the actuator spanning substantially the full door width and extending between the inner and outer narrow stile frame members, and wherein the lock mechanism is mounted in the outer narrow stile frame member and has a latch bolt supported for movement between latched and unlatched positions, the latch bolt being releasably retained in the latched position by deadlock means and being movable to an unlatched position in response to pressure applied in a door opening direction to a push bar that is movably supported on one or more linkage assemblies having an operating connection with actuating means operable to initially release the deadlock and thereafter move the latch bolt to the unlatched position.

Abstract: A drill for use in drilling precious and semi-precious stones consisting of a body adapted to be rotated on its axis, said body having longitudinal cutter elements separated by longitudinal flutes, the surfaces of the body of said drill being covered by an abrasive layer consisting of a ductile metal, such as nickel, containing a multiplicity of abrasive particles.

Abstract: A window or similar pane of glass that is rendered burglar-proof by being faced with a relatively thinner film of strong transparent plastic material adhesively secured to said glass pane, the cohesion of the latter being such that while the glass pane may break under the force of blows applied to it or to the outer surface of the film adhesive, the broken pieces of the pane will be retained in their co-planar position adhesively held in place by said film. A reinforcing frame may be provided to firmly hold the four or more circumscribing edges of the film of adhesive secured to the window frame.

Abstract: A smoking pipe consisting of a bowl providing a tobacco chamber and stem having a stem opening connected to the bottom of the tobacco chamber. The wall forming the tobacco chamber has air passages formed in the wall which connect from the upper end of the bowl wall to the bottom of the tobacco chamber where the air passages connect to each other and to the stem opening whereby when the pipe is packed with tobacco and lighted air will be drawn through the air passages to the stem opening and will also be drawn into the body of tobacco below the burning area, where it is mixed with the smoke of the burning tobacco and withdrawn from the tobacco chamber through the stem opening.

Abstract: A bed frame of the type having a pair of side rails interconnected by one or more crossbars to provide a support for a box spring, and in which adjustable box spring locating and retaining clips are provided on the side rails to permit the sides of the box spring to extend beyond the side rails, and to hold the box spring against shifting movements in relation to the supporting bed frame.

Abstract: Concrete pumping apparatus of the positive displacement type in which primary and secondary pumping units are actuated in a manner such that the pumping discharges from the pumping units overlap in a manner to produce a substantially constant flow delivery, the pumping units having pistons operably connected to a pivoted rocker arm having a driving connection with a main shaft, and another overriding driving connection with the main shaft which varies the driving action of the rocker arm, wherein the pivot of the rocker arm is supported on a swingable lever having its outer end operably engaged with rotatable cam means carried by the main shaft.

Abstract: A protective garment for minimizing impact-caused injury, primarily to the body of a motorcyclist, comprising a body-part-enclosing covering means including an effectively hollow body-part-contoured inflatable bag provided with ingress port means and exterior inflating tube means communicating the ingress port means and pressurized gas supply means and the normally closed ingress valve means relative to fixed portions of a motorcycle for forcible opening actuation of the normally closed ingress valve means upon forced abrupt separation of a motorcyclist's body from a motorcycle as a result of an accident, for causing the rapid discharge of compressed gas through the open ingress valve means, inflating tube means, and ingress port means into the inflatable bag whereby to bring about abrupt inflation thereof in a body-protecting manner.

Abstract: A pressure compensated flexible extensile and retractile elongated tubular bellows having opposite ends arranged to be sealingly connected with members operatively movable towards and away from each other, and in which the bellows has a wall structure formed to maintain a substantially constant internal pressure of entrapped fluid within the bellows, during extensile and retractile movements thereof.

Abstract: A wet type marine toilet of the jet flushing type, wherein a reservoir tank is provided in a branch line connection to a top flushing rim of the bowl to delay the flushing action, and to impound fluid during the flushing operation, and upon termination of the flushing operation to discharge impounded fluid through the bowl bottom discharge outlet so as to form a normal fluid level in the bowl.

Abstract: A method of manufacturing a high permeability granular material, which is advantageously useful in hydraulic fracturing operations for completing new wells or stimulating older wells which produce oil, gas or other fluids by appropriate sizing and mixing of natural or manufactured particles in a manner such that the material will, when used in a proppant layer, retain its permeability with respect to contacting or surrounding natural soils or geologic formations containing fines capable of plugging conventional permeable materials, when such fines are moved by gravity or fluid flow forces.

Abstract: A flexible diaphragm with a U-shaped surrounding fold, containing a plurality of reinforcing fabric members of cross-shaped configuration cut from an elastomer or other suitably coated sheet of material of woven fabric in which the threads are in right-angled relation, each of the cut members having outwardly tapered arms extending from a central area, the cross-shaped configuration having an orientation with respect to the threads of the fabric such that the right-angled threads will extend longitudinally and transversely of each arm, in which the cross-shaped members are stacked in superimposed axial relation with the radiating arms of adjacent cut members being successively offset and having their edges in overlapped relation, and wherein the stacked cut members are encased within a molded elastomeric or other suitable material.

Abstract: A gun cleaner consisting of a plastic bag having a pouch adapted to receive the gun to be cleaned with its barrel pointed downward, and having an elongated barrel-receiving portion of reduced cross-sectional size, the bag being adjustable so that the barrel-receiving portion may be of a length suitable to receive the barrel of the gun. The barrel-receiving portion is foldable to a position in which the length of the barrel-receiving portion accommodates the gun barrel yet is not so large that it uses an excessive amount of cleaning solution or solvent. The barrel-receiving portion may be unfolded into a position to form a solvent or liquid cleaner-receiving chamber below the barrel so that this liquid may flow or drain downwardly into said solvent-receiving chamber.

Abstract: A jet type engine includes a rotor through which air is drawn and compressed by centrifugal force with the air thus heated and compressed being mixed at the periphery of the rotor with fuel to ignite the same and establish a jet which causes the rotor to rotate. In some cases the air may be precompressed prior to its delivery to a hollow shaft from which it travels radially outwardly through hollow spokes for compression and heating prior to its mixture with fuel that is introduced through a small tube extending through a corresponding one of such hollow spokes. The resulting combustion gases are directed through guides onto turbine buckets on a second rotor which rotates in a direction opposite to that of the air and fuel conducting rotor and the exhaust gases are discharged in a direction extending parallel to the axis of rotation, i.e., sideways. A common output shaft is coupled to these two oppositely rotating rotors for powering, for example, an automobile with energy derived from both such rotors.