Abstract: A rotational phase difference of a camshaft relative to a crankshaft in a variable valve timing mechanism is controlled by an operation of an oil control valve. That is, in the oil control valve, there is outputted an operational signal which is defined by adding a feedback correction amount corresponding to a difference between an actual value and a target value of the rotational phase difference, to a holding learning value as the operational signal for holding the rotational phase difference. The holding learning value is altered only by a specified value on condition that the operational signal for holding the rotational phase difference is assumed to change.

Abstract: A coke oven door extractor is mounted on the rail car and includes door engaging supports movable in individually differing amounts relative to a plane parallel to and including the door jamb and a door jamb height axis of symmetry and movable vertically, allowing the door extractor to compensate for front-to-back tilting and side-to-side leaning of the coke oven door jamb due to thermal distortion of the battery and variations in individual door heights. The extractor includes a first frame pivotally mounted to the car, a second frame horizontally translatably mounted to the first frame, and a third frame vertically translatably and pivotally mounted to the second frame, with the third frame including the door supports.

Abstract: The movable actuating lever is connected to a transmission lever, at one hand, and is guided by means of a pin within a guideway in the housing of the apparatus, on the other hand. The transmission lever serves at the same time for transmitting the actuating motion via further levers to the apparatus part to be actuated. Due to the position and the shape of the guiding groove and the lever, the course of motion of the actuating lever with respect to the fixed handle portion may be optimally adapted to technical and ergonomic requirements in order to achieve an effective force transmission having minimal frictional losses. Furthermore, no levers are in the way, and injuries are avoided.

Abstract: A coke oven rail car with a drive control system for positioning the car and for spotting the functional equipment carried by the car. A sensor determines the relative position of the car with respect to a selected oven in a coke oven battery. The car includes a first drive for effecting gross movement of the car along the rails and gross positioning of the car relative to the selected oven. The car further includes a second automatically controlled drive for effecting fine movement of the caw along the rails and fine positioning of the car relative to the selected oven. In one embodiment the first drive is manually controlled, while in another embodiment the first drive is automatically controlled. The second automatically controlled drive can take the form of one or two disk clutch type mechanisms or a clutch band type mechanism.

Abstract: A rotary sprinkler including a stationary cylinder, one end of which is connectable to a water supply line, a central rod rotatably mounted inside the cylinder, having at least one supply duct passing therethrough and directly leading to a sprinkler head attachable to the upper end of the rod, as well as a plurality of separate control ducts inside, and ports communicating with the ducts and leading to the outer surface of, the rod, at least one port communicating with the supply duct.

Abstract: An apparatus for providing stepwise movement along an elongated stepped member. A holder contains at least one button that includes a pivotally mounted claw disposed to engage the stepped member when the button is depressed. The claw pivots upon engagement with the stepped member and further depression of the button moves the button and holder laterally a distance determined by the steps on the stepped member.

Abstract: A hot melt glue gun is described and claimed having a rod feeding mechanism (14) comprising a trigger (50) arranged to drive clamping means to grip a rod of adhesive and to move the rod towards a melt chamber (17) of the gun. The clamping means comprises a carriage (42) movable towards and away from the melt chamber and having a shaped portion (110) to accept a rod to be fed. The clamping means also comprises, pivoted on the carriage, a clamp member having a clamping arm portion (71) for gripping the rod against the shaped portion, and a crank arm portion (70). The crank arm portion has an operating portion (49) having a convex surface (64) arranged to co-operate with pressure means (207) of pivotally mounted connecting means (52). The connecting means is positioned to be operated by the trigger. By virtue of the disposition of the pivots and the clamping arm and of the shaping of the operating portion of the crank arm, there is brought about an improved usage of triggering effort to feed the rod.

Abstract: A block of solid thermoplastic material comprising alternating sections of circular and rectangular cross section, a device for melting and dispensing thermoplastic material having a thumb operated drive assembly for driving the block into the device, and a molding mechanism including two chain like structures that move along linear path portions with molds included in the structures in face to face relationship while molten thermoplastic is injected in an inlet end of the linear path portion to continuously mold the block.

Abstract: A sequential ratchet drive for an appliance timing cam is disclosed. The drive includes a pawl adapted to drive ratchet teeth located on the periphery of a main program cam in a step-by-step manner. The pawl is driven and guided by cams against and with the bias of springs in an initial tangential drive path in driving engagement with a ratchet tooth. The cams guide the pawl out of engagement with the driven tooth in a curvilinear retraction path with the bias of a first spring and against the bias of a second spring to a raised location and then the pawl is returned to its initial driving position by the bias of both springs. A portion of the path of travel of the pawl from its raised location to its initial position may be defined by a portion of a ratchet tooth so that the retraction path of the pawl may adapt itself to a variety of varying tooth spacings.

Abstract: A brake control mechanism is adapted to operate trailer brakes in an overrun manner, and to incorporate a handbrake mechanism. A draw shaft of a towing coupling acts on a first arm of an overrun brake link, which has a second arm on which there is provided a connection point for a brake rod. When the brakes are actuated in an overrun manner, the brake link is activated by the draw shaft and pivots about a first pivot point. When the handbrake mechanism is activated, the overrun brake link is caused to pivot about a second pivot point, such that the maximum travel of the aforementioned connection point for the brake rod is greater than in an overrun braking action. The overrun brake link is resiliently biased into a brake actuating position.

Abstract: The legs of the landing gear of a semi-trailer may be automatically extended and retracted by a pneumatically operated actuator adapted to be connected to the crankshaft of the landing gear and adapted to rotate the cross-shaft of the landing gear selectively in either direction at a high or low speed. The crankshaft is rotated by gears and ratchets which are driven by pawls adapted to be reciprocated by an air-actuated cylinder and adapted to be alternately positioned in active and inactive positions. The flow of pressurized air to the cylinder is controlled by a cycle valve and an on-off valve, the latter being capable of turning off the actuator automatically when the legs are fully retracted.

Abstract: A forward and rearward indexible stepping mechanism, for instance for a multi-position switch, which is arranged within a housing and has a one-piece drive which can be brought into engagement with a rotatably arranged pinion by means of a linear work movement. At the drive there is provided a flexible latching element which connects two plungers in a bridge-like fashion, so that a latching cam arrangement formed at the latching element engages at the pinion.

Abstract: A tool arm assembly adapted to be supported on a machine tool adjacent a workpiece rotating spindle has a tool carrier mount on a flexible, deformable portion; a bi-directional actuator for operating manually adjustable motion transmission means is operated by a remotely controlled motor device which normally is out of operating engagement with the actuator so that the motion transmission means can be adjusted manually.

Abstract: Within a housing of a multi-position switch there is arranged a forwardly and backwardly indexible stepping mechanism comprising two actuation elements which can be individually brought into engagement with a pinion of a character support or carrier by accomplishing a linear working movement. Each actuation element comprises a push-button, a switching or indexing element and a preferably hairpin-shaped spring element, or is operatively connected with a coil spring mounted in the housing. By means of each push-button the related actuation element is moved in a first direction, whereby its switching element, guided by a first pin along a cam or equivalent structure, is deflected, and a second pin comes into engagement with the pinion, so that this pinion, which is rotatably mounted upon a shaft, can be moved in a predetermined direction against the restoring force of a latching spring engaging into a tooth gap of the pinion by means of a latching cam or nose.

Abstract: Rotary ratchet mechanism includes a ratchet wheel rotating about a first axis. A dog at one end of a lever engages a tooth of a wheel to rotate it in one direction. The lever is pivoted to a member at a point spaced from its end, the member being movable from first to second positions along a second axis spaced from the first axis and normal to a plane including the same to move the dog in the opposite direction from a first position engaging one tooth to a second position engaging another tooth. The pivot is spaced from the second axis on its side remote from the first axis and in the first position of the member is spaced from the other side of the plane. An anti-reversing dog is provided at one end of a second layer pivoted to a support at a second point spaced from its end, the second pivot being spaced from the other side of the plane and from the second axis on its side toward the first axis.

Abstract: An automatic hydraulic hammer including a frame with suitable mountings to attach the frame to an existing hydraulic feed test boring drill machine. A weighted hammer is reciprocal within the frame through a measured distance and is arranged for substantially frictionless operation. A hydraulic cylinder mounts upon the frame and receives its power from the hydraulic test boring drill machine. A plunger is responsive to function of the hydraulic cylinder and terminates downwardly in an arrow-shaped head which releasably connects to a plurality of pivotally mounted clamps. When the head engages the clamps, the hydraulic cylinder is functioned to raise the plunger and the releasably attached hammer through a known distance. The top of the frame is provided with a plurality of depending fingers which function with the clamps to quickly and positively release the head at the top of the hammer travel.