Abstract: Prewired lighting fixtures and prewired tap boxes each having an input and output receptacle are electrically interconnected by flexible connecting cables having a plug-in connector at each end. The tap boxes have additional output receptacles for connection of branch circuits and some have output receptacles for connection of plug-in switch drop cables. Three wires, one of which is common, extend throughout the system and provide alternate two-wire circuits to facilitate selective switching, reduction in voltage drop, and economy of material.

Abstract: A rest for a hand held wood turning tool which facilitates the forming of concave and convex surfaces has a horizontal rest bar comprising two joined and oppositely curving arcuate portions of different curvature in the general form of a letter "S," with a bevelled tool rest surface extending continuously along one side thereof and an intermediately positioned downwardly extending cylindrical mounting post. A simplified modification has a single horizontal arcuate rest bar with bevelled tool rest surfaces extending along both sides.

Abstract: An arc welder has a transformer comprising a pair of flat aligned primary coils of aluminum strip wound on opposite parallel legs of a rectangular open frame core and a pair of aligned secondary coils of the same strip material wound on the same opposite parallel core legs in lateral spaced relationship with the primary coils, a flexible strip encircles each pair of aligned coils tightly banding them against lateral distortion, a flux shunting core encapsulated in molded plastic material is slidably movable through the core between the pairs of aligned coils, and mechanism for slidably moving and locking the shunting core in adjusted positions is operated by a single handle. One secondary coil of the pair comprises two windings, one wound over the other to provide two output ranges. In a modification, the addition of an outboard choke coil of round wire provides a third output range.

Abstract: Sealing apparatus for a self-aligning bearing having a one-piece housing comprising three annular members on each side of the bearing, two of which members are axially assembled and fixed in the housing, the third annular member of each trio being axially assembled on the inner bearing race for rotation therewith and extending axially and radially between the other two, the three annular members each having axially and radially extending walls spaced from and coextending with axially and radially extending walls of the other two to form a tortuous path.

Abstract: The handle section of a take down bow has a socket at each end loosely receiving the butt ends of upper and lower bow limbs arranged to pivot both fore and aft and laterally on outer end portions of the rear socket walls; adjusting screws extending through inner end portions of the forward socket walls engage the forward faces of the bow limbs to variably tilt them fore and aft in the plane including the low and the bow string, and camming members rotatably mounted in inner end portions of the rear socket walls have eccentric portions extending into and engaging laterally opposed surfaces of notches in the ends of the bow limbs to variably pivot the limbs laterally.

Abstract: An electrostatic precipitator having an ionizing section including a series of positively charged fine wires in equally spaced parallel relationship and a collector section including alternate positive and negative plates equally spaced and parallel with the ionizing wires and in which three negative plates of the collector section are extended into the ionizing section adjacent each wire to provide three electrostatic fields.

Abstract: In a gas burner control system a normally closed, electromagnetically opened first valve has primary control of gas flow to pilot and main burners and the application of gas pressure to cause a normally closed, diaphragm-operated second valve controlling gas flow to a main burner to open; the first valve opens and a spark igniter becomes operative to ignite the pilot upon closure of a space thermostat. A thermostatically operated switch heated by pilot flame has a cold position through which a circuit to open the first valve is completed and a hot position through which a circuit causing the diaphragm-operated second valve to open is completed. A holding circuit paralleling the switch is effective to hold the first valve open when the switch moves to its hot position, but is ineffective to open it, so that upon failure of the electrical power supply, the first primary control valve will not open until the switch has cooled to its cold position.

Abstract: A manifold gas valve for controlling gas flow to a burner has a diaphragm operated main valve, an electrically operated control valve, and means to delay the application of gas pressure to the main valve operating diaphragm to effect a delayed opening of the main valve. Opening of the control valve permits an immediate flow of gas to the main burner and simultaneously admits the application of gas pressure to effect a delayed opening of the main valve. The immediate flow of gas to the burner, which occurs upon opening of the control valve, is sufficient to effect reliable and timely ignition and support combustion.

Abstract: A unit designating printer wheel for a counter-printer device is arranged for convenient interchangeable assembly between the drive wheel and counting printer wheels. The unit printer wheel has a plurality of unit designating characters around the rim thereof and is arranged to be locked in rotatably adjusted position; and a hub member rotatable in the unit designating printer wheel is arranged to transmit motion from the drive wheel to the counting printer wheels.

Abstract: A device for mounting a pair of stabilizers for adjustable angular projection from opposite sides of a bow includes a transverse mounting bar attached to a face of a bow and extending from opposite sides thereof; a rotatably adjustable member is mounted on each end of the bar for rotation on an axis longitudinallly of the bar; each member has one or more screw threaded bores therein lying at an acute angle to an outward projection of its axis of rotation adapted to receive a screw threaded stabilizer rod.In another form of the invention a first rotatably adjustable member is mounted on each end of a transverse mounting bar for rotation on an axis longitudinally of the bar and a second rotatably adjustable member is mounted for rotation on each of the first members on an axis perpendicular to the mounting bar; the second members each have a screw threaded bore therein perpendicular to its axis of rotation receiving a screw threaded stabilizer rod.

Abstract: An air flow responsive switching means controlling "on" and "off" operation of an electrostatic air cleaner comprises a controlled solid state switch having gating means including a thermistor arranged to be cooled by air flow. The thermistor is incorporated with the high voltage power supply circuit in a casing for convenient removal and replacement.

Abstract: A burner orifice member for a detachably mounted gas oven burner is mounted directly on the end of the burner gas supply conduit by screw-threaded engagement, and the end portion of the gas supply conduit is rigidly connected to the oven wall by bracket means, with the orifice member in fixed alignment with the burner inlet.

Abstract: One half of a main motor winding and a shunting lead are connected between one side of a power source and two of the terminals of a three terminal plug-in receptacle; the other half of the main winding and a second shunting lead are connected at one end to the other side of the power source and each has a plug-in terminal connected to its other end for selectively connecting the two winding halves in parallel or in series across the power source.

Abstract: A gas burner control system in which closure of a space thermostat causes energization of an electromagnetic actuator to supply fuel to a pilot burner and effect the operation of an igniter to ignite it; a thermostatic actuator heated by the pilot flame then effects the flow of fuel to a main burner where it is ignited by the pilot burner. The electromagnetic actuator also jointly controls the flow of fuel to the main burner, so that when the thermostat opens, de-energizing the electromagnetic actuator, fuel flow to the main burner as well as to the pilot burner is immediately cut off.

Abstract: A spherical bearing is yieldably held firmly on a rigid annular seat by a high-rate leaf spring having a flanged central opening forming a second annular seat engaging another portion of the bearing. The leaf spring includes portions extending oppositely from the central opening, which portions are stressed and underlie diametrically opposed retaining lugs. The leaf spring is assembled by flexing the extending portions and rotation into position under the lugs.

Abstract: An oven burner control system having a manual rotary valve controlling gas flow to main and pilot burners and a solenoid operated valve controlling flow to the main burner, control circuit means embodying spark ignition means to ignite the pilot, means responsive to conduction through pilot flame to cut off spark ignition and permit operation of the solenoid valve, and variable resistance means responsive to oven temperature effecting cyclic operation of the solenoid valve. A control knob rotating with the manual valve varies the control point of said temperature variable resistance means and actuates a line switch to connect and disconnect the control circuit with a power source.