Abstract: Quality control attachment adapted to be fitted onto a threaded depth control bar of a drill press machine includes a sleeve having an axial opening for fitting onto the control bar and being longitudinally movable relative to the bar. The sleeve carries a pawl and an elastic O-ring which urges an edge portion of the pawl into engagement with the threads of the control bar for enabling one-way movement of the control bar downwardly through the sleeve. An actuator pin is slidably disposed in a bore which extends through the sleeve and is movable downwardly in response to contact with a stop-nut disposed on the bar when the drill press has advanced to a preset depth represented by the position of the stop-nut.

Abstract: Domestic hot water heating control circuit is used in conjunction with a furnace control unit of a hot air furnace system which utilizes a hot water heat exchanger. The hot water control circuit has a diverter valve which is electrically connected to a thermostat which monitors a hot water tank and a fan control circuit for controlling the operation of a comfort fan for the hot air system integrated with the furnace control system. The diverter valve controls the circulation of heated water between the heat exchanger of the furnace and the hot water tank. When the hot water tank thermostat calls for heat, the diverter valve switches a relay to start the furnace and to direct heated water from the heat exchanger of the furnace to the heating coil of the hot water tank. The fan control circuit then operates to shut "off" the comfort fan to prevent cold air from being supplied to the living space in the event that the space thermostat calls for heat.

Abstract: A device for breaking open cylindrically packaged rolls of coins, has a base and an anvil centrally located on the upper surface of the base. The anvil includes a lower portion affixed to the base and an upper portion against which the roll of coins are struck to break open the same.

Abstract: Improved decocking mechanism for a semi-automatic firearm has a lever pivotable on one side of the frame of the gun. One end of the lever includes an actuator and the opposite end, has a sector gear meshed with the toothed surface of a pawl rotatable on the hammer pin between a first position and a second position. The pawl is disposed adjacent the hammer and includes a first leg engageable with the sear to pivot the same against sear spring pressure out of engagement with a first notch adapted for holding the hammer in its fully cocked position. The pawl includes a second leg engageable with the drawbar to pivot the same downwardly to prevent its engagement with the sear in response to the trigger pull. The hammer includes a second notch engageable with the sear to hold the hammer in a half-cocked position and a reset pin disposed to engage the first leg and to return the pawl and the decocking lever to their at-rest positions upon forward rotation of the hammer.

Abstract: An air pump formed of a resilient elastomeric material bondable about the perimeter of an opening provided in a plastic inflatable bladder, has a self-supporting spherical dome portion and a generally planar base portion. An inlet flapper type valve is integrally formed in a wall of the dome and an outlet check valve extends through an opening in the base for supplying air into the plastic bladder accomplished by alternately compressing and releasing the dome. The underside of the base includes projections disposed about the outlet valve to hold the bladder wall clear of the outlet valve. The base may also include a tail portion which extends laterally of the dome with an exhaust valve affixed thereto for deflating the bladder.

Abstract: Rotor of a magnetomotive device has a discrete permanent magnetic and a ferromagnetic core disposed within an injection molded, synthetic plastic body in the form of a flywheel. The core is of integral, laminar construction and includes hub and counterweight portions and a pair of radially extending, circumferentially spaced arm portions. At their outer ends, the arm portions terminate in pole shoes with opposed, undercut edges to retain the discrete permanent magnet therebetween. Each of the arm portions has a laterally extending shoulder portion and, at their inner ends, connect to the hub by narrow neck or stem portions which are resiliently flexible. From the center of rotation of the rotor, the stem portions are each disposed along a given radius.

Abstract: Improved pawl assembly for starting mechanisms of small engines mounted on the engine flywheel provided with a bore therein and includes an integrally molded, polymeric pawl, a U-shaped torsion spring and retaining means disposed in the bore of the flywheel. The pawl has a depending shank rotatably fitted into the bore of the flywheel and oppositely extending end portions. The outer end portion, or spur, is adapted to engage a fin or vane of the flywheel to orient the inner end portion, or toe, of the pawl to engage the teeth of the ratchet surface of a pulley type starter. The closed end of the torsion spring is fitted over the shank and urges the pawl to its ratchet engaging position. The spring includes leg portions fitted into the bore of the flywheel and each leg terminates in a laterally extending hook portion adpated to interfit within the retaining means disposed at the end of the bore opposite the end into which the shank is fitted.

Abstract: Slide decelerator for a firearm has a cylindrical cavity formed in the metallic receiver of the firearm and a deformable mass of elastomeric material is disposed within the cavity. A piston is slidably fitted into the cavity and a rod extends outwardly from the piston for engagement with a depending portion of the slide. The elastomer consists of a cylindrical plug which has a diameter substantially smaller than the inner diameter of the cavity and an axial length approximately equal to that to the length of the cavity. Upon firing, the slide, being moved rearwardly by blow-back of combustion gases, will impact against the rod and elastomeric material will be deformed to thereby absorb the kinetic energy of the slide. As a result, the slide is stopped before impacting against the receiver of the firearm.

Abstract: A device for propagating microwave energy to a plasma discharge tube from an antenna coupled to a microwave generator includes a hollow rectangular conduit and a strip-line resonator or strip-line conductor disposed therein. The discharge tube is mounted perpendicular to and through a central opening in the strip-line resonator and is disposed at a distance, from one end of the strip-line where the antenna is located, of one-half the wavelength of the microwave energy and one-quarter wavelength from the opposite end. The strip-line is attached to one end of the rectangular conduit and is supported by a dielectric member at a point one-quarter wavelength from the antenna. Microwave energy is propagated from the antenna by the strip-line dimensioned to the resonant frequency of the microwave the energy. A gas, such as argon or helium, is introduced into the discharge tube and is ionized by microwave energy to form a plasma.

Abstract: Segmental grinding wheel for forming the tip of intersecting surfaces on tools includes an array of peripherally extending and circumferentially, spaced segments. Each segment includes first and second grit-coated angularly oriented grinding surfaces. Another array includes similar grinding segments which are interdigitated in alternating sequence with the segments of the first array. The segments of the two arrays are concentric and partially coextensive in the axial direction of the wheel so that the plane of rotation of the first grinding surface of each segment in one array intersects the plane of rotation of the second grinding surface of an adjacent segment in the other array along a line which represents the tip of the intersecting surfaces.

Abstract: An inflatable bladder is defined by two superimposed outer sheets of heat-sealable synthetic plastic fused together about their peripheral edges. An Intermediate layer or baffle is disposed between the two outer sheets and is alternately sealed to one and the other of the outer sheets to form air cells on the opposite sides of the intermediate layer. Each of the air cells is defined by an opposed surfaces on one side of the intermediate layer and of one of the outer sheets and adjacent seals which fuse together the layer and each sheet. The seals which define the cells on one outer surface of the bladder are offset from the seals which define the cells on the other surface of the bladder. Opposite surface portions of the intermediate layer are coated with a barrier layer to prevent heat-sealing on each side of the intermediate layer opposite the seals on the other side which form the cells whereby the bladder and the cells thereof may all be formed simultaneously in one heat-sealing operation.

Abstract: Removable front sight for the barrel of a firearm has an upper blade portion, a generally rectangular base portion and a lower shank portion. The base portion is adapted to fit into a correspondingly shaped recess and the shank portion is generally cylindrical in shape to fit into an upwardly opening bore formed in the upper surface of the gun barrel and adjacent the muzzle end thereof. A longitudinal hole extends from the muzzle end of the barrel, communicates with the bore, and terminates rearwardly thereof to provide a housing for a combination spring and detent disposed therein. The detent is urged forwardly by the spring to engage, releasably, a groove in the shank having an axially opening entry portion and a detent receiving cavity angularly offset from the groove. A pin extends across the longitudinal hole and fits into a trough formed in the upper edge portion of the detent to limit the stroke of the detent.

Abstract: Removable front sight for the barrel of a firearm has an upper blade portion and a lower keel portion. The keel portion is undercut and adapted to fit into an upwardly opening recess provided in the upper surface of the gun barrel and adjacent the front end thereof. A cylindrical hole extends longitudinally from the muzzle end of the barrel, communicates with the recess, and terminates rearwardly thereof to provide a housing for a combination spring and detent disposed therein. The detent is releasably urged forwardly by the spring to engage the inner end of the keel. A cross-pin is fitted across the recess to engage the forward end of the keel and to prevent removal of the spring and detent from the cylindrical hole. The spring is rearwadly compressible sufficiently to enable insertion and removal of the keel from the recess from between the detent and cross-pin.

Abstract: Cartridge magazine for semi-automatic firearms has a base, side walls and a front and rear wall. The front wall has an opening at its upper end for the feeding of cartridges into the chamber of the firearm. The magazine includes a spring and a spring follower which feeds the cartridges upwardly toward the feed lips on the upper edge of the side walls of the magazine. A guide member extends inwardly from opposed sidewall portions of the magazine to engage the extractor groove of the cartridge being advanced toward the feed lips. Each guide member is formed by die lancing the side walls of the magazine at a distance from the feed lips greater than the cartridge radius, but less than the diameter thereof. Each member has an upright edge portion disposed at an oblique angle to the real wall of the magazine such that it is generally perpendicular to the axis of the cartridges being fed by the magazine spring follower.

Abstract: Rotor of a magnetomotive device has a discrete permanent magnetic and a ferromagnetic core injection molded within a synthetic plastic body in the form of a flywheel. The core is of integral, laminar construction and includes hub and counterweight portions and a pair of radially extending, circumferentially spaced arm portion. At their outer ends, the arm portions terminate in pole shoes with opposed, undercut edges to retain the discrete permanent magnet therebetween. Each of the arm portions has a laterally extending shoulder portion and, at their inner ends, connect to the hub by narrow neck or stem portions which are resiliently flexible. From the center of rotation of the rotor, the stem portions are each disposed along a given radius.

Abstract: Time-delay circuit for automatic shutdown of furnace systems has an induced draft blower motor and a first circuit for providing energy to the blower motor from an energy source. A second circuit for energizing the primary control system of the furnace, includes a thermostat and an electronic switching means. When the thermostat is "closed", the second circuit is completed to energize the electronic switching element which starts the blower. An airflow switch is provided to sense the start of the blower and to thereby energize a primary control which provides gas to a burner of the furnace. A timer set to a predetermined time interval has an output and two input terminal connections, one connected to the output of the thermostat and another to the output of the primary control system. When the thermostat is "closed" and the burner is operating, the timer is disabled.

Abstract: Integral solenoid and starter motor having four or more poles for internal combustion engines has an electrically conductive disc carried by the armature or core of the solenoid for movement in response to energization and de-energization of the solenoid coil. Three stationary contacts of electrically conductive material are disposed in circumferentially spaced relation about the longitudinal axis of the core for sequential engagement by the movable disc. One of the stationary contacts, connected to an electrical energy source, is disposed at a position closer to the movable disc than the other stationary contacts. The other stationary contacts are connected in parallel circuits to two poles of the starter motor whereby each contact carries one-half the current supplied by the energy source. The disc is tiltably mounted on the core for making initial contact with the first stationary contact and later, with the two other contacts in response to the solenoid being energized.

Abstract: A carrier device for umbrellas has a shoulder engaging hook and stabilizer affixed in spaced relation on the lower end of the umbrella shaft. The shoulder hook is concave to conform to the shoulder of the wearer and its free end is angled toward the middle of the back for more secure gripping. The stabilizer is disposed below the shoulder hook and is vertically curved to conform to the upper torso of the wearer and has a concavely curved upper edge to accommodate the arm of the user for stabilizing the umbrella. In addition, the stabilizer includes an opening to provide a handle portion whereby the umbrella may be hand held when not fitted onto the torso.