Abstract: An encapsulated device containing a bladder disposed between a wall of the case and the encapsulant. The bladder defines a space devoid of encapsulant, thereby allowing the unimpeded thermal expansion of the encapsulant. By reducing thermal expansion stresses on the encapsulated devices, the reliability of the encapsulated device is improved. The device is formed by installing a component within a case; positioning a bladder within the case; depositing encapsulant with the bladder in an inflated condition; and deflating the bladder.

Abstract: Apparatus for moving a reciprocating object, such as a spring biased poppet valve, between a rest and a second position. The apparatus includes two solenoids, each of which has a core, with one of the solenoids having a larger core and imparting greater force than the other. The solenoids are mounted in line with one another so that the core of one solenoid is adapted to contract the core of the other, with the latter being adapted to contact the object. A first solenoid provides a driving force to the object to move it in opposition to a biasing force and the second solenoid holds the object in its moved position when the first solenoid is de-energized. When the core of the first solenoid is in its rest position, it is out of contact with the core of the second solenoid and this enables the biasing force of the object to rapidly move to its rest position upon de-energization of the second solenoid.

Abstract: A lost foam pattern assembly comprising a crankcase section including first and second mounting surfaces, a right cylinder section which is fixed to the first mounting surface and which includes a primary locator, a left cylinder section which is fixed to the second mounting surface and which includes a primary locator, a transfer passage having an upper end located in the right cylinder section, and a transfer passage having an upper end located in the left cylinder section.

Abstract: A foam pattern assembly for use in forming an engine block in a lost foam casting process, the pattern assembly comprising a base portion including a generally planar front mounting surface having therein a plurality of crankcase-defining cavities and a plurality of intake ports, and a rear mounting surface spaced from the front mounting surface, the base portion partially defining a plurality of transfer passages and a plurality of air intake passages each communicating between a respective one of the intake ports and a respective one of the transfer passages, and a cylinder portion including a generally planar front mounting surface mating with the rear mounting surface on the base portion, the cylinder portion partially defining the air intake passage and partially defining a plurality of cylinder bores each communcating with a respective one of the transfer passages.

Abstract: An apparatus comprising a batch hopper including a bottom wall having therein a plurality of openings, a plurality of walls dividing the batch hopper into a plurality of compartments each communicating with a respective one of the openings and each adapted to receive sand from a main hopper, and a sliding gate for simultaneously opening and closing the openings in the bottom wall of the batch hopper.

Abstract: Disclosed herein is a rotary internal combustion engine comprising a generally trochoid shaped housing including a pair of spaced generally parallel side walls, a generally triangularly shaped rotor supported within the housing for rotation about an axis perpendicular to the side walls, which rotor includes three generally identically shaped side flanks which define, in cooperation with the housing, respective chambers which rotate with the flanks and which vary in volume in accordance with such rotation. The side flanks each include an end which leads in relation to the direction of rotor rotation, an end which trails in relation to the direction of rotor rotation, and a length extending between the leading and trailing ends.

Abstract: A circuit interconnecting a source of electrical energy with a power operated machine. The circuit comprises an interlock device including a motion switch which is adapted to be removably attached to the machine operator's body. The motion switch is movable between a normally deactivated position to prevent the flow of electrical energy from the source to the machine and an activated position to permit the flow of electrical energy from the source to the machine for operating the machine. The motion switch is operable to be moved to the activated position in response to movement of the operator's body.

Abstract: Disclosed herein is a control for a direct current motor including a field weakening solenoid switch including a solenoid coil, which control includes a switch connected in series with a coil for connecting and disconnecting the coil to a source of direct current, and a device responsive to motor speed for operating the switch.Also disclosed herein is an overspeed control for a direct current motor including a solenoid switch which controls energization of the direct current motor, which is biased open, and which includes a solenoid coil operable in response to energization thereof to close the switch, which overspeed control comprises a switch connected in series with the coil for selectively connecting the coil to a source of direct current, and a device responsive to motor speed for operating the switch.

Abstract: Disclosed herein is a carburetor for internal combustion engines having an automatic choke control mechanism including a vacuum diaphragm assembly operatively connected to a choke lever for opening a spring-biased closed choke valve and holding it open at idling and lower engine speeds and a linkage arrangement interconnecting a throttle valve lever and the choke lever for holding the choke valve open at higher engine speeds independently of the vacuum diaphragm assembly. The linkage arrangement includes a spring-biased choke pull-out lever which is held in a locked position during engine idling and lower engine speeds by a link having one end slidably received in a slot in the choke pull-out lever and the other end connected to the throttle lever.

Abstract: Disclosed herein is a rotary internal combustion engine comprising housing means defining, in series, first, second, third and fourth trochoid shaped rotor cavities in aligned relation to each other, a rotatably mounted crankshaft including, in series, first, second, third and fourth eccentric portions respectively extending through the first, second, third and fourth cavities, and with the first and fourth crankshaft eccentric portions aligned with respect to each other and with the second and third crankshaft eccentric portions aligned with respect to each other at an angular spacing of 180.degree.