Abstract: An improved detachable headrest, specifically intended for lawn chairs. The headrest has a metal or plastic frame featuring adjustable height means and quick release design.

Abstract: An electronic system for controlling the extent of motion and starting and stopping positions of a hydraulically driven member is described. The driven member is equipped with voltage sensitive means which provides a voltage indicative of the position of the driven member along the path of motion. The position indicative voltage is compared with reference voltages and the resulting comparison voltages actuate switching circuitry to effect changes in the travel speed of the driven member and to control the start and stop positions of the driven member. Hydraulic or mechanical apparatus responsive to the switching circuitry controls the motion extent and velocity of the driven member in accordance with the comparison voltages. The inventive control system thus provides accurate positioning and selected velocity changes along the path of motion of a member driven by a hydraulic source.

Abstract: In an internal combustion engine of an automotive vehicle of the type having a carburetor which is operated by an accelerator pedal attached to the carburetor throttle valve by suitable linkage, a system is provided for comparing the actual intake manifold pressure to a predetermined intake manifold pressure setting. Means are provided for signaling the vehicle driver when the absolute intake manifold pressure increases above the predetermined setting for the desired operating condition to permit the driver to operate the vehicle in an optimum fuel-saving manner. The system comprises a control mechanism which senses intake vacuum and compares it to a predetermined intake manifold absolute pressure.

Abstract: A system for simulating the parameters tested by a testing device is described. The testing device is used to verify that a sensor and tone wheel of an anti-skid system are properly functioning and connected. Accordingly, the testing device is used to check the resistance of the sensor, the level and frequency of the output voltage from the sensor, and whether the tone wheel has any missing teeth or is improperly aligned with respect to the sensor. The invention is directed to a system for simulating all these parameters to verify that the testing device is functioning properly.

Abstract: An epicycloidal crank drive mechanism is disclosed as comprising a support frame mounting a prime mover coupled through a gear reducer to drive a primary rotary member about a first fixed axis on which a sun gear is concentrically disposed. The primary rotary member carries at least one roller gear that is engaged by the sun gear such that the roller gear rotates about a second axis which is parallel to the fixed first axis and movable with respect to said first axis as the primary rotary gear is driven by the prime mover. The roller gear has an upper portion on which is mounted a roller adapted to movably engage a slotted section formed in a plate member. The plate member is driven by the roller for rotation about the first fixed axis. The plate member carries a crank arm which moves through a motion that varies relative to the velocity of the primary rotary member. The mechanism is disclosed as an integral part of two types of crank mechanisms.

Abstract: A heating and cooling system for heating water contained in a swimming pool while providing a means for cooling or heating the interior of a building. The system includes a compressor connected through suitable conduits to a condenser located in a swimming pool and an evaporator such that, when a fluid heat-transfer medium, such as ammonia, is communicated under high pressure to the condenser, heat is given off thereby, while evaporation of the medium in the evaporator results in a reduction in temperature surrounding the evaporator which, in conjunction with a suitable fan arrangement, may be used to cool the interior of a building. A second condenser is provided with suitable valving and conduit means for selectively communicating the second condenser to the compressor and the evaporator whereby the building may be cooled while not heating the water in the pool.