Abstract: Magnetic holder for keys and the like embodying this invention is in the form of a unitary extrusion of synthetic plastic, magnetic material. The extrusion has a planar web portion, and a key-shaped cut-out is provided through the base portion of said magnetic material. The extrusion includes longitudinal, inwardly opening side edge channels, and the sheet is slidably insertable within said channels as a closure for one side of said key shaped cut-out.Also disclosed is a method of manufacturing such key holders which includes the steps of extruding a unitary, continuous strip of synthetic plastic magnetic material with a planar web portion and inturned longitudinal edge channels. A key-shaped cut-out is punched through the web portion of the magnetic strip, and a flat panel is fitted over one side of the key-shaped cut-out, with the edges of the panel disposed in said channels.

Abstract: A full wave rectifier regulator for an alternator battery charging system has gate controlled rectifier connected in two separate branches of the rectifier bridge. The gates of the rectifiers are connected to the anode-cathode circuit of a third gate controlled rectifier (SCR) and are thereby selectively turned "on" and "off" by the current flow in the anode-cathode path of the SCR. A portion of the alternator output voltage triggers the SCR to its conductive mode whenever the battery voltage is between predetermined voltage levels. A protection circuit comprising an electronic switching component is connected to the gate of the SCR to shunt off any gate triggering current to hold the SCR "off". The switching component is connected to sense the battery voltage and to clamp "off" the SCR should its voltage either be lower or higher than the predetermined levels.

Abstract: A gas and liquid mixing nozzle for an abrasive type slurry is characterized by a central liquid passage and a helical vane disposed about the outlet end of the liquid passage to deflect the liquid outwardly into a generally flat spray pattern. The vane portion of the nozzle is preferably a separate insert formed of abrasion resistant material. An annular orifice is coaxially disposed about the outlet end of the liquid passage to eject an air stream into the liquid spray to mix therewith and form an aerated, high velocity spray. At the outer end of the helical vane is a deflector plug having a generally planar inner surface against which the liquid, issuing from the nozzle passage, impinges. The plug has a substantial axial length approximately the same as the axial dimension of the vane portion of the nozzle, and its outer periphery is inwardly and outwardly tapered toward the outer surface of the plug. This contour provides for a spray pattern of uniform droplet size.

Abstract: Electronic shut-off circuit is provided in a capacitor discharge ignition system for internal combustion engines to protect against excessive high-speed operation. The circuit includes an electronic switching component connected across the main capacitor of the ignition system. A trigger coil is connected in circuit with a control electrode of the electronic switching component. The trigger coil is selected to generate a sufficient voltage to bias the switching means to its conductive state, thereby providing a low impedance shunt path to short the capacitor and to prevent it from discharging its energy into the primary of the ignition coil. A resistance-capacitance network, in circuit with the switching component, serves to hold it "on" until the engine is shut off.

Abstract: A filing unit for storage and retrieval of magnetic recording disks is disclosed. The unit includes a plurality of pockets or storage panels which can be removably stored in a modular holder and the holder itself can be combined with various other filing components, such as a storage binder having front and rear covers or a desk-top filing stand. In the preferred embodiment, the pocket is carried by a file bar affixed along one edge thereof. The holder includes a plurality of parallel channels each adapted to pivotally receive the file bar of a storage panel. Each channel includes retaining lugs which straddle the channel and are flexible to permit snap-insertion and removal of the bar from the holder.

Abstract: Band saw blades embodying this invention are especially adapted for the cutting of hard metal work pieces of large cross-sectional size. The blades are characterized by a straight, planar sawtooth cutting edge and a tiered or stepped back edge, having alternate recessed and outer edge portions. Both the recessed and outer edge portions of the blade's back edge are generally parallel to the cutting edge of the blade and adjacent of these alternate edge portions are connected with inclined or tapered sections. The length of the recessed and outer edge portions are approximately equal; and when combined with the length of an inclined section, is about equal to the spacing of the saw guides of the band saw machine in which the blade is to be used.

Abstract: A belt buckle construction is disclosed which has a keeper with a frame and tongue pivotably disposed on the outer end thereof for interengagement with the longitudinally perforated end of a flexible belt strap. The keeper also includes a rearwardly opening sleeve to receive the inner end of the belt strap, which may be of the reversible type. The sleeve includes an upwardly opening undercut slot which exposes a surface portion of the inner end of the belt strap. A combination belt loop and belt clamping member transversely engageable within said slot and including a projecting portion for engaging and releasably clamping the inner end of said belt within the sleeve of said keeper. This construction enables the belt to be cut to any desired length and/or reversed from one side to the other. The belt loop portion of said clamping member serves to receive and retain the outer end of the belt flat against the underlying end of the belt for a neat appearance.

Abstract: Breakerless ignition system of the inductive type is used to provide ignition pulses for an internal combustion engine which substantially duplicates the timing performance of a breaker-point magneto. The system utilizes a transistor for making and breaking the current flow in the primary coil of the ignition transformer. Switching of the transistor is controlled by a silicon controlled rectifier (SCR) and gating of the SCR is controlled by a time-delay network which includes a capacitor, resistor and a transistor switching means in circuit with the control electrode of the SCR. A second transistor and capacitor network controls the rate of rise of current to the time-delay network as a function of engine speed.

Abstract: A knockdown, but sturdy, cabinet for campers is disclosed. The cabinet can be quickly assembled at a campsite by first attaching a pair of sidewalls to the inside of a weatherproof covering so that the sidewalls are spaced apart and parallel to one another. The sidewalls have opposed inner surfaces with transverse grooves so that a plurality of shelves can then be slid between the sidewalls and into the grooves to complete the cabinet. When breaking camp, the cabinet can be easily broken down by sliding the shelves out of the grooves and then detaching the covering from the sidewalls. The shelves, sidewalls and covering can then be stacked and stored in a small box so as to take up little space during the trip home.

Abstract: A heat-sink type of water heater unit is disclosed wherein the unit is designed for external installation on a stove to transfer heat from the stove to water flowing through the unit, to pre-heat the water for subsequent use. The unit has a flat surface which can be bolted to the outside of the stove, an inlet which can be attached to a cold-water source, a U-shaped inner passage in which water can flow and be heated by the stove, and a discharge which can be hooked up to a hot-water tank. In addition, the unit has an adjustment feature which enables the unit to be moved laterally, closer to or farther away from the hot stove wall to which the unit is connected. By regulating the distance between the unit and the stove, the water temperature produced by the unit can be selectively controlled.

Abstract: A portable log splitting machine is disclosed wherein the splitter can be readily broken down into separate lightweight components for convenient transport and storage, such as in the trunk of an automobile. The splitter includes a ram section comprising an elongated beam with a wedge fitted at one end and a slidably-mounted pusher plate or ram which is hydraulically operated to drive a log against the wedge to split the same. The ram is reciprocably moved by the piston rod of a double-acting hydraulic cylinder. The rod is detachably connected to the ram by a simple yoke and cross pin arrangement and the cylinder is detachably fitted onto the beam by a trunnion pin that extends from the cylinder and slips into brackets carried by the beam for ready assembly and disassembly. An engine-driven pump assembly is connected to the cylinder by two detachable hoses and provides the hydraulic pressure for the cylinder.