Abstract: An endless power transmission belt is provided which has a compression section and a plurality of longitudinally extending ribs comprising the compression section and defining the inside surface of the belt and each pair of immediately adjacent ribs has a space therebetween with the space allowing wear of the ribs while assuring the apexes of sheave projections operatively associating with the belt are maintained spaced from the belt thereby prolonging the life thereof.

Abstract: Coaxially spaced externally toothed gears are bridged and interconnected by a resilient annular gear formed from a coil of flexible material having corrugations shaped to engage the gear teeth. The external peripheral of the annular gear is enclosed by a sleeve member maintaining it in resiliently wedged circumferential driving engagement with the externally toothed gears.

Abstract: An improved mechanism is provided for biasing a driven gear in a gear train of the variable center distance type in which the driven gear is meshed with a drive gear and rotates about an axis which is not fixed, at least radially, relative to the axis of the drive gear. The biasing mechanism includes spring means engaged with the driven gear for biasing the same substantially radially toward the driven gear into mesh therewith at a force which provides appropriate relatively low-level engagement forces between the meshed gear teeth. A stop is provided for limiting deflection of the spring means in a direction corresponding to unmeshing of the drive and driven gears. The stop is positioned to limit such deflection of the spring means to an amount less than the deflection required for unmeshing of the gears.

Abstract: A demand driven clutch which constitutes an improvement over Jensen U.S. Pat. No. 3,369,765 and Treise U.S. Pat. No. 3,695,534 and which includes a pair of cooperating driving elements, one of which constitutes a driving collar fixed to the rotary drive shaft and the other constitutes a driving hub connected to said collar by stress distributing axially disposed connecting elements to maintain the circular configuration of the outer clutch surface of said hub for uniform engagement with the circular inner clutch surface of the spring spool pulley member.

Abstract: The invention relates to gear drives. The globoid worm gearing comprises a cylindrical worm-wheel in mesh with a globoid worm. The side surfaces of the thread of said globoid worm are shaped so as to envelop the side surfaces of the worm-wheel teeth with the result that in the process of successive engagement of the worm thread with the worm-wheel teeth the worm thread makes a linear contact throughout the side surface of the worm-wheel teeth. Said globoidal gearing is capable of transmitting larger torques and possesses a greater kinematic accuracy than like-size modified globoid worm gears known in the prior art.A method of making the globoid worm is provided whereby the worm is generated through relative movements of the worm blank and a rotary cutter and thereafter the side surfaces of the worm thread are finished by honing. The cutting edges of the rotary cutter are located on a generating surface having the shape of the side surfaces of the cylindrical worm-wheel teeth.

Abstract: A variable speed device comprising a pair of discs driven from a source of power each disc having rack teeth forming its surface. The device including also a pinion in mesh with the rack teeth of each disc mounted to be movable radially of the disc to vary the speed of an output shaft in relation to the rotation of said disc.

Abstract: A synchronous belt and pulley drive in which the drive between spaced pulleys is primarily by frictional contact of a belt on the pulley peripheries; synchronization is insured by providing spaced teeth on the belt which teeth are accommodated by tooth gaps in the periphery of the pulleys. The drive is further characterized by matching the pitch of the driveR pulley with the belt pitch under a first tension and matching the pitch of the driveN pulley with the belt pitch under a second tension, wherein the first tension is different and usually greater than the second tension.

Abstract: A transmission, in which power is transmitted from one variable diameter pulley to another through an endless band, has an automatic band tensioning mechanism. The band tensioning mechanism includes a tensioning shaft, an adjusting wheel rotatably mounted on the shaft, and a spring connected between the shaft and the wheel. A worm engaged with the wheel is mounted on a shaft slidably received in a locking member. The worm has a locking shoulder at one end which is normally urged, by the spring acting through the wheel, into engagement with a locking shoulder on one end of the locking member. The worm is moved out of locking engagement against the bias of the spring for rotation of the worm and wheel, and tightening of the spring.

Abstract: In an apparatus which has a driving shaft which is rotatable at a first fixed position in one direction only and a driven shaft which is rotatable at a second fixed position remote from the first position, the improvement comprising a belt drive system for selectively rotating the driven shaft in the one direction and in an opposed direction.

Abstract: A reciprocating piston engine, pump or compressor including a crank-shaft having a crank-pin offset laterally from the axis of rotation of the crank-shaft, a connecting-rod pivotally-mounted on the crank-pin and pivotally-connected at the end thereof remote from the crank-pin to a piston, the axis of pivoting of the connecting-rod on the crank-pin being offset laterally from the longitudinal axis of the crank-pin, a non-rotatable gear mounted co-axially of the crank-shaft axis of rotation and a rotatable gear wheel mounted co-axially on the crank-pin for rotation thereon and in mesh with said non-rotatable gear, the connecting-rod being mounted on the rotatable gear for pivoting about an axis offset laterally from the longitudinal axis of the crank-pin, whereby the axis of pivoting of the connecting-rod on the crank-pin follows a predetermined locus as the crank-shaft is rotated.

Abstract: There are disclosed in the present specification a plurality of planetary differential drive formats, both simple and compound, in which each drive pair or couple comprises a driving and a driven element interconnected by a flexible connector such as a roller chain or a cogged belt and at least one driving and one driven element are mounted for planetary motion about the input and output axis.

Abstract: A linearly movable latch mechanism is provided to move into engagement with a deformable collet whenever an undesired ejection of a leadscrew is initiated from a nuclear reactor mounted control rod drive. Such an undesired ejection would occur in the event of a rupture in a housing of the control rod drive. The collet is deformed by the linear movement of the latch mechanism to wedge itself against the leadscrew and prevent the ejection of the leadscrew from the housing. The latch mechanism is made to be controllably engageable with the leadscrew and when thus engaged to allow the leadscrew to move in a control direction while moving with the leadscrew to engage and deform the collet when the leadscrew moves in an ejection direction.

Abstract: Apparatus for applying torque to a vertically suspended electrode whereby threaded electrode sections can be readily connected.

Abstract: This device consists primarily of an adjustable leg supported gear box, to which is hinged, a base plate to which is secured an electric motor, which will drive the input shaft of the gear box, the output shaft of the gear box being secured to clutch means, the sleeve of which will connect with a silo unloader, so as to provide heavy duty means of operating the silo unloader.

Abstract: A drive assembly for use with mining apparatus such as conveyors or coal ploughs includes a chain tensioning device which is incorporated in the housing of a resilient coupling device which forms part of the transmission from a drive motor to the mining apparatus.

Abstract: A belt drive including a toothed power transmission belt and toothed pulley or pulleys operating in conjunction and each having an improved tooth configuration. Each belt tooth as viewed in longitudinal cross-section includes stress relieving portions or fillets adjoining the opposite sides of the base of the tooth. Each fillet has an outer perimeter or outer surface area which is at least 30% of one half of the total outer perimeter or outer surface area of the belt tooth. The pulley in cross section includes an outermost portion having an arcuate outer perimeter formed by the arc of at least one circle whose center point lies within the pulley tooth with one half of the arcuate outer perimeter or outer surface area being at least 30% of one half of the total outer perimeter or outer surface area of the tooth.

Abstract: The present invention has for object a mechanism of transmission comprising two toothed wheels meshing with each other.

Abstract: An assembly, specifically a mirror assembly for a motor vehicle, in part angularly adjustable by an electric motor and drive mechanism. A fixed motor drives a worm that is angularly movable through a flexible coupling into selective engagement with one of two nuts to drive adjusting screws that cause a mirror element to pivot about one of two mutually perpendicular axes. The screws and pivot structure for the mirror are integrally formed as part of a mirror supporting plate. The nuts are yieldably coupled to the threads of the adjusting screws to permit slippage between the two when forces exceed the wormed driving force. Operating noise is reduce by a vibration-damping motor mounting and by structure limiting worm engagement with the nuts. Projections are carried by the mirror supporting plate resiliently biased against a fixed support to reduce vibration.

Abstract: A system for obtaining mechanical power from a driven belt conveyor which services a remote area such as a coal mine where delivering electrical power is difficult and/or hazardous. The system includes apparatus selectively driven by the return flight of the mined material conveyor belt to provide mechanical driving power to an auxiliary device, such as a pump. A pair of driveable rollers are coupled together on the same side of the belt and a tensioning roller, for urging the conveyor belt into driving engagement with the driveable rollers, is adjustably positioned on the opposite side of the belt.

Abstract: A power train includes a rotary driving member normally engaged with a rotary driven shaft through a spline connection to transmit power therebetween. A cage threadably extends through a threaded bore in the housing and is rotatably attached to the driven shaft so that rotation of the cage slidably moves the driven shaft from the engaged position of the spline connection to disengaged the spline connection. A yieldable stop means is secured to the cage for engagement with the housing to provide an indication of when the spline connection is disengaged.