Abstract: A pressure sender is provided with a variable electrical resistance corresponding to a sensed pressure, to be placed in series with a voltage source and a pressure gauge. The pressure sender is diaphragm-actuated, which diaphragm controls the positioning of an electrical contact against a ceramic thick film rheostat. An electrically conductive metal clip secures the rheostat in position as well as completes the electrical connection between the rheostat and the electrical circuit of which the pressure sender is a part. The electrical contact is rockingly mounted so that deflection of the diaphragm displaces the electrical contact through an arcuate travel path along various resistance positions of the thick film ceramic rheostat. Current from the electrical circuit will flow through the metal clip to input contacts of the rheostat, and then to the resistance positions.
Abstract: A completely electronic programmable hour meter is disclosed. The hour meter accumulates and displays run time of the device being measured. The hour meter can also count pulses. The meter can be preprogrammed with a maintenance timer limit which is compared to the accumulated run time. If the accumulated run time equals or exceeds the preprogrammed time limit an alarm display flashes. The hour meter will store the accumulated run time for up to 5 years if power is interrupted. This memory retention occurs without use of a battery. The elapsed time is stored in a plurality of registers such that no register is written to more than a preselected number of times, nominally ten thousand, until all the registers have been updated the preselected number of times.
Abstract: A directional starting spring which ensures that an AC synchronous motor is rotating in the proper direction is disclosed. The AC synchronous motor includes a circular magnet rotating in "synch" with the frequency of the alternating current. The magnet rotates a worm gear attached to the center on its axial face. This worm gear drives a second worm gear positioned perpendicular to the first worm gear. The second worm gear drives a series of gears which display the elapsed time. Attached to this second worm gear is the directional starting spring. If the motor is rotating in the proper direction the spring contacts the housing of the meter and slides on the second worm gear. If the motor is rotating in the wrong direction the spring contacts the axial face of the magnet stopping the rotating magnet and pushing it in the proper direction.
Abstract: A double acting piston and cylinder air motor with pneumatically actuated pilot valves for shifting a directional control valve, where the pilot valves are controlled by pilot ports in the cylinder as they are uncovered by the piston.
Abstract: An instrument with an illumination ring that edge-lights an opaque dial face with increased light flow by augmenting the conductivity of both the light receiving portion of the ring and a bevel for deflecting light laterally across the face. The increased light flow is accomplished by an extended annular wall portion spaced from the edge of the dial face.
February 11, 1988
Date of Patent:
February 21, 1989
Stewart Warner Corporation
Panagiotis K. Mandellos, Renzo N. Rutili
Abstract: An illuminated information display including a standard planar active display, such as an LCD display, covered by a rigid transparent plate with fixed graphics on its rear surface illuminated by light transmitted laterally through the plate.
Abstract: An air core gauge having orthogonally related coils that react with a rotor magnet to angularly position an indicating pointer, suitable for use as either a pressure,temperature, or fuel gauge. All-attitude pointer zero return is achieved with a stationary magnet, and voltage regulation is eliminated with a zener diode in series with one of the coils.
Abstract: A vehicle tachometer kit including a pick up coil that is adapted to be mounted on the outside of the vehicle's alternator to sense its rotating field without any disassembly. An induced signal in the coil from alternator field leakage provides the normal input to a user calibrated r.p.m. display driving circuit in the tachometer that can be calibrated for different alternators and drive pulley ratios without another tachometer by selectively applying a simulated input reference signal to the display driving circuit and adjusting the r.p.m. display until a scheduled ratio is achieved between the displayed r.p.m. and the reference signal.
Abstract: A pneumatic power tool that includes fluid conveying passageways formed by casting grooves in the tool exterior and then molding an elastomeric material over the grooves to enclose the passageways.
Abstract: A self-cleaning restrictor assembly for a high pressure lubricant valve that minimizes the effect of accidental discharge by reducing no load outlet flow. The restrictor assembly has a pair of restrictors that are alternately opened and closed to provide a constant restricted flow area while easily passing any foreign material.
Abstract: A heavy-duty caster assembly with a pintle and swivel plate mounted on top of a wheel carrying horn that minimizes pintle bending and breaking with the addition of a powdered metal washer around the pintle locked on top of the swivel plate.
March 4, 1986
Date of Patent:
November 24, 1987
Michael P. Doyle, Francis J. Forte, Edward Galkowski
Abstract: A wound wire rheostat for a fuel level sender or other condition sensor and its method of manufacture, that eliminate wire snapping by heat staking selected portions of the wire into its plastic support board.
Abstract: A hand lever operated grease gun that has both high pressure and high volume modes by changing the mechanical advantage of the lever acting on a dispensing piston. A spring biased pivotal connection between the lever and a forwardly mounted supporting link is shiftable between two positions by depression of the lever against the biasing force of the spring.
Abstract: An electrically controlled pattern tracer selectively uses stored detected pattern information from a sensor differently depending upon the value of a selected entered kerf entered to control the tracing element to follow a pattern turn. The tracer also distinguishes one type of pattern turn from another and delays use of stored pattern information for control of the tracing element by different amounts depending upon the type of turn detected and the entered kerf.
Abstract: A pattern tracer with circuitry for electronically adjusting the lateral offset of the tracing element for kerf compensation, that produces a control signal based on a temporal relationship between a reference signal and a pattern detection signal associated with a preselected kerf compensation. The pattern is traced with the selected lateral offset in accordance with a control signal. The control signal is developed in response to both a line width compensation signal and a kerf compensation signal. A photometric detector is calibrated by electronically adding a compensation angle to a pattern detection angle to compensate for any physical misalignment of the detector.