Abstract: A fuel ignition control arrangement for use in a fuel ignition system includes a control circuit responsive to a thermostatically-controlled circuit element for the fuel ignition system for causing a gaseous fuel to be supplied to burner apparatus of the system, a spark-producing circuit responsive to the thermostatically-controlled element for igniting the fuel supplied to the burner apparatus, a timing circuit responsive to the thermostatically-controlled element for de-energizing the control circuit after a predetermined timing interval, and a flame sensing circuit responsive to the ignition of the fuel supplied to the burner apparatus for maintaining the control circuit in fuel supplying condition.

Abstract: A radio communication system for simultaneous telecommunication between a calling station and a called station, in which an aural signal to be transmitted from the calling station is divided by sampling pulses in the form of clock pulses of low frequency and is then suitably compressed with respect to the time axis to produce periodic signal-free time regions in the compressor output, so that an aural signal similarly compressed with respect to the time axis and transmitted from the called station can be received within these signal-free time regions. The received aural signal is expanded with respect to the time axis so that the original aural signal output of the microphone in the called station can be reproduced and applied to the speaker in the calling station. A zero cross synchronizing circuit is connected to the compressor to attain zero cross synchronization of the time-divided compressed aural signal and such aural signal is applied to the transmitter.

Abstract: An improved remote meter reading system is disclosed comprising apparatus for transmitting UHF AM interrogating signals from an interrogating mobile or central station to a remote transponder station, and apparatus for retransmitting UHF FM data signals from the energized transponder to the mobile or central interrogating station. The interrogating station further includes apparatus for validating that the UHF FM data signals received are in fact the UHF FM data signals actually sent by the remote transponder selected by the interrogating or central station.

Abstract: A digital tachometer having an optical sensor which provides a signal at a frequency related to the rotational or reciprocating speed of a moving object, a phase locked loop and a frequency divider circuit connected for operation as a frequency multiplier to be responsive to the sensor signal to provide a serial pulse train the period of which is an integral multiple of the sensor signal, a pulse accumulator for registering the pulses and a time rate generator which enables the pulse accumulator to register pulses for a preset duration so that the number of pulses registered is a direct representation of the revolutions per minute of the moving object.

Abstract: A washer cutting machine is disclosed wherein a sleeve of an elastomeric material suitable for use as a washer is placed on a mandrel and rotated. A predetermined length of the sleeve extends beyond the end of the mandrel, and a knife-edge moves in a radial direction to cut a ring from the end of the sleeve of a width such that it may be suitable for use as a washer. The machine is programmed so that the steps of loading the sleeve on the mandrel, cutting a washer from the sleeve, advancing the sleeve the width of a washer to be cut at the completion of each cutting operation, and stopping operation of the machine after the last washer has been cut therefrom, are all carried out automatically.

Abstract: Cable pull lines are pneumatically rodded through underground cable housing conduit comprising joined multipassage sections by attaching the free end of the pull lines to individual foam carriers inserted into each passage at one end of the conduit and forcing air through a manifold into said passages behind the foam carriers to simultaneously drive the carriers to the open exit end of the conduit. The pull lines have been previously uniformly wound on a reel and a brake is used to tension the reel as the pull lines unwind therefrom to keep the foam carriers in phase as they advance through the conduit and thereby to prevent air bypassing the leading foam carriers through gaps at the conduit section joints with resultant loss of driving pressure.

Abstract: The present application discloses and claims the method of producing a blast joint for oil well production tubing. The method disclosed and claimed herein relates to assembling, upon the exterior of a length of production tubing, a stack of short length refractory rings resistant to abrasion and capable of enduring high temperature, to be used in a string of oil well production tubing.

Abstract: The sparkplug cleaner of the present invention provides a closed container, comprising a cylindrical barrel member open at its upper end. Its upper open end is adapted to be closed by a cover member, upon the center of which is mounted an electric motor having a vertical shaft extending down through the cover member. The said shaft on its lower end, inside the container, carries a closed impeller rotatable in a horizontal plane to throw the particulate abrasive out tangentially. Inside the cup-shaped barrel member, and below the impeller, are mounted guiding vanes for guiding the return flow of airborne abrasive particles carried upwardly in a swirling airflow circulation created by the rotating impeller.

Abstract: The present invention is applicable to wobble piston compressors having overrun intake ports and being driven by a motor of low starting torque. In such a layout the vacuum created in the compression chamber upon initial motion of the piston from top standstill (at the outer end of the cylinder) may be great enough to stall the motor of low horsepower. The present invention provides an overrun relief port which, although it slightly lowers the overall efficiency of the unit, provides means for breaking the initial vacuum that tends to stall the motor on starting, and it provides that service, at a low cost, and with exceptional reliability. The loss in efficiency caused by the starting relief port, or ports, is minimized by locating the said port or ports at a point where the loss in efficiency on the compression upstroke is minimized. Small capacity air compressors of the rocking rod piston--wobble piston--type when driven by low powered A.C.

Abstract: Oligomers produced by reacting low molecular weight epoxy compounds and low molecular weight mono-hydroxy vinyl compounds having at least one vinylic unsaturation, either in the form of vinyl groups, allylic, acrylic or methacrylic radicals attached thereto, wherein the resulting oligomers have more than one vinylic group per molecule.

Abstract: An agricultural implement has a hinged winged frame which swings between a horizontal storage position over the main frame and an outboard generally horizontal work position. A hydraulic cylinder pivoted to the implement main frame has its piston pivotally connected to the upper end of an operating link which pivotally connects at its opposite end to a link made rigid with the wing frame and which swings on the hinge axis. An abutment block on one of the links engages the other link to solidify the pivotal connection of the links converting the two links into a first class lever fulcrumed on the hinge axis as the piston is retracted within the cylinder to raise the wing frame out of its working position.

Abstract: A strong, light-weight rack is disclosed which collapses or folds into a compact form for shipping or storage and opens to orient a plurality of vertically spaced planar shelf members at a proper angle and variable spacing to receive and contain carpet swatches and like samples of goods in convenient, overlapping vertical display. Side portions of the rack as well as the top are hinged so as to fold into compact positions as the shelves articulate into the collapsed position. As the shelves are re-oriented into spaced relationship, the sides and top are foldable into positions for engagement with the frame and rigidify the structure.

Abstract: An alarm transmission system for transmitting alarm and status information from a secured area to a monitoring area over a transmission line includes a code source in the secured area which provides a line security code for securing the transmission line, an alarm source which modifies the line security code in the event of an alarm condition, and a data selection network which enables preselected bits of the line security code and a further bit representing the access/secure status of the secured area to be transmitted to the monitoring area during preassigned time slots for comparison at the monitoring area with corresponding bits of a reference code provided by a reference code source, and an access/source status bit to permit an alarm to be indicted when one or more of the compared bits differ.

Abstract: Manual tool used for trimming mold flash and protuberances from a tire has a handle with ends which are slotted to receive mounting flanges of a undulated sheet metal blade. The blade is so folded that its undulations comprise closely spaced ridges which extend from front to rear, are open on their underside and are united by narrow intervening webs. The underside of the lead edge of the blade is sloped along an arc and/or angle providing the blade with recesses in said leading edge between the ridges. The recesses have sharp cutting edges which cut entering flash close to the tire surface, the open under side of the ridges on either side of the webs providing clearance for missed flash and trimmings so that the tool blade is not raised off the tire surface in use of the tool.

Abstract: Replaceable blades have an inner generally planar portion which is mounted between imperforate spacers of a tire buffing machine hub and an outer working edge portion which protrude beyond said spacers. Said working edge portion has spaced teeth and means in the form of apertures located adjacent the base of the teeth and outwardly of the perimeter of said spacers for collection and direction of air and/or externally applied moisture in rotation of the hub. In some of the disclosed forms the trailing edge of the apertures is embossed or otherwise scoop shaped for increased collection capability and/or capacity.

Abstract: Tire rasp is disclosed for a tire buffing machine in which the blades and spacers are removably assembled in holders which in turn are removably assembled between the top and base plates of a hub comprising the tire rasp. Each holder and its assembly of blades and spacers are separately removable from the reversible in the tire rasp hub.

Abstract: An advance grounding system for electrical connectors includes a male attachment portion and a female receptacle portion. The male attachment portion contains a pair of current carrying electrical contact blades and a ground contact blade extending outwardly, with the ground blade having a length greater than the current carrying contacts. The female receptacle includes a pair of electrical terminals positioned in recesses and adapted to receive the current carrying contacts, and a ground terminal which extends to a point adjacent the inner face of the female receptacle. The ground terminal is arranged so that it is not possible for the current carrying blades to contact the female terminals before the ground blade contacts the female ground terminal when the male attachment portion is inserted into the female receptacle portion to complete the electrical connection.

Abstract: A stack damper control arrangement for use in a heating system including a furnace having a fuel-fired burner apparatus and a vent stack for conducting combustion products away from the burner apparatus and a damper plate pivotally mounted within the stack and movable between a fully open and a fully closed position, includes a reversible drive motor which is energizable in response to a request for heat to drive the damper plate to the open position, a first limit switch operated when the damper plate reaches the open position to effect the deenergization of the motor, the motor being reenergized at the end of the heating cycle to drive the damper plate to the closed position, and a second limit switch operated when the damper plate reaches the closed position to effect the deenergization of the motor.

Abstract: A digital start-stop multiplexing system including a sender which sequentially scans a plurality of monitoring points and generates a train of digital pulses coded to represent information provided at the monitoring points for transmission over a transmission line to a receiver which is responsive to the digital pulse to automatically synchronize itself with the sender, store the data pulses and provide indications of conditions indicated at the monitoring points. The receiver also monitors the transmission line and detects and displays open or short circuit conditions of the transmission line. Coded pulses may also be transmitted from the receiver location to the remote sender over the same transmission line during stop portions of the primary signal.

Abstract: In the T1 PCM carrier system there are 193 bits per frame, 192 of which are used for the channels. The D1 channel bank uses the 193rd bit to identify the division between frames, with a pattern from frame to frame of . . . 010101 . . . . The D2 channel bank uses the 193rd bit of alternate frames, or every 386th bit for framing. Both D1 and D2 have a framing circuit to identify the framing bit by the pattern with a normal mode and a search mode. There is a violation monitor for comparing the pattern of framing bits from frame to frame and indicating a violation if there is a deviation. In the normal mode only the framing bits are examined, and some error tolerance is allowed. Violations are registered in a memory device to check if a preset threshold is exceeded. When the threshold is exceeded, a misframe is declared, and the circuit goes into a search mode to examine other bit positions for the framing pattern. No error tolerance is allowed in the search mode.