Abstract: A chain tensioning device comprises a pair of arms 2, 3 which are pivoted together and urged apart so that the arm 3 applies a tensioning force to a chain by means of a spring loaded cam block 5. A catch disc 9 and rod 8 arrangement is provided to prevent return movement of the spring loaded block and hence collapse of the arm 3 under load reversals of the chain.

Abstract: A metal belt comprising a plurality of sets of interleaved sets or ranks of links which are joined by pivot means, such as a pin or a pin and rocker, to permit articulation, having blocks secured to each rank of links, the blocks being provided with surfaces to engage the opposed pulley flanges in a pulley drive system, as for example in a variable pulley transmission and the like.

Abstract: A flexible power transmission belt especially adapted for transmitting power between pulleys such as variable pulleys in a transmission is constructed of a loop of material with closely adjacent lugs or teeth joined thereto, the lugs or teeth having a slot-like opening to receive the loop and having obliquely disposed wings which are deformed to join them to the loop. The wings are generally relatively soft whereas the toes or other parts of the teeth are generally hardened.

Abstract: A power transmission chain-belt as disclosed is especially adaptable to transmit power between the pulleys of a pulley transmission, the pulleys of which are each constructed of a pair of flanges. The chain-belt comprises a plurality of sets of interleaved links joined by pivot means, and a set of at least three generally V-shaped or trapezoidal load blocks located between each adjacent pair of pivot means. Each load block has a central opening permitting its assembly with the links, and edge surfaces to drivingly contact the pulley flanges. The central opening of the load blocks has a height greater than the height of the links, so as to define a space therebetween. Resilient means, such as a curved leaf spring, is positioned between each set of links in the space between the chain and the central opening of a set of load blocks to apply a force on the load blocks of each set.

Abstract: A pump assembly having an impeller for pumping a fluid from an intake to an outlet, a prime mover for driving the impeller, and a primary mechanical seal assembly between the prime mover and the impeller which is located in a housing. The mechanical seal assembly substantially prevents leakage of the fluid being pumped along a shaft connecting the impeller and the prime mover. A secondary mechanical seal means is located in the housing between the prime mover and the mechanical seal assembly. The secondary seal means is constructed of a material, such as carbon, which will collapse under pressure of the fluid being pumped upon failure of the primary mechanical seal assembly, to substantially prevent the leakage of fluid along the shaft and to the exterior of the housing.

Abstract: A thrust bearing assembly especially adaptable for use with a centrifugal pump and located between the impeller and the impeller driving means and constructed of multiple bearings, each of which is preloaded to a certain value such that under conditions of no upwardly directed thrust load, the upper and lower bearings share a load applied to the upper bearing while a middle bearing is subject only to its preload, and under upwardly directed thrust load conditions, the upper and middle bearings share the upwardly directed thrust load while the lower bearing carries its preload.

Abstract: A closure arrangement for a pump housing having a generally cylindrical bore, comprising a closure member connected to the housing by a closure ring and a plurality of shear studs received in threaded openings, a portion of each opening being in the housing member and a portion being in the closure ring, and locking or compression means comprising compression bolts received in the closure ring and acting on the closure member.

Abstract: A flexible power transmission belt, especially adapted for use with drive blocks and pulley transmissions comprising a composite structure of metal bands, cord-like tension members and elastomer material, the latter being cured and maintaining the integrity of the composite structure.

Abstract: A power transmission chain adapted to be used with toothed sprockets, the chain having a plurality of sets or ranks of interleaved links, the adjacent sets or ranks of which are connected by pivot means. The links of the chain each have a pair of toes separated by a crotch, each toe being defined by outside and inside flanks, the latter defining the crotch. The chain is assembled with some of the links being constructed to drivingly contact the sprocket teeth on their inside flanks and the remainder to drivingly contact the sprocket teeth on their outside flanks. The arrangement alters the normal tooth contact noise frequency.

Abstract: A mechanical seal assembly adapted to be associated with a rotatable shaft and a housing and having three seal rings, one connected to the shaft and thus rotatable, another connected to the housing and thus stationary, and the third or center intermediate the rotatable and the stationary seal rings. The center seal ring has spaced faces each engaging an adjacent face of the adjacent ring. The center or intermediate seal ring has its seal faces defined by circular boundaries radially offset from one another and from the axial center of the assembly. In other words, the seal faces of the center ring eccentric to one another and each is eccentric to the contact face of the adjacent ring.

Abstract: A flexible power transmission means comprising an assembly of a chain constructed of a plurality of sets of interleaved links joined to its next adjacent set by a pin, and load blocks surrounding the chain and located between the next adjacent pins. Additional load blocks may be located over the pins. The load blocks are generally contoured at their edges to fit into the V of a pulley. When the load blocks are close together, the front and rear surface of at least some of the load blocks are tapered to permit articulation of the assembly. The load is carried by the chain's pins; the blocks are located longitudinally by the pins.

Abstract: Charge forming apparatus such as a carburetor of the fluid jet type in which fuel is supplied to a pair of tubular members, which may be of equal or different diameters, disposed across a housing opening through which air flows, the velocity of which is controlled by a throttle valve or damper means. Each tubular member is constructed with a generally upwardly directed slot or fuel gap, such that the air strips fuel therefrom. Excess fuel from the tubular members is returned to the source. In the specific apparatus, one tubular member is located upstream in the housing from the other, the lower tubular member being located closely adjacent to the location of initial opening of the air throttle valve or damper. The throttle valve or damper may be of the iris type or of the type having a pair of vanes pivoted outwardly of the center thereof, so as to initially open at the center thereof.At small throttle openings, air flowing to the engine is concentrated over the fuel gap of the lower member.

Abstract: A fail-safe-open actuator for actuating valves and the like which comprises a pair of opposed cylinders joined to define piston chambers, the axes of which are generally perpendicular to a valve stem. Pistons in the cylinders are connected to the valve stem by toggle links, the pistons being resiliently urged toward the ends of the assembly which corresponds to an open-valve position. To close the valve, a pressurized fluid, such as air, is introduced into the piston chambers and to the pistons at sufficient pressure to counter the resilient means so as to move the pistons away from their rest, valve-open positions, and thus move the valve stem perpendicularly to the axis of the piston chamber. A handwheel is provided to manually close the valve by moving the pistons from their rest positions.A solenoid controlled pneumatic valve may be used to control the supply of pressurized fluid, such as air, to the actuator.

Abstract: A fuel system in which excess fuel is recirculated from the charge forming apparatus. The apparatus comprises a regulator having a body with a fuel supply port connected to a fuel source, an outlet port for supplying fuel to a zone and a return port for receiving excess fuel from the outlet port and recirculating the excess fuel to the fuel supply. In addition, the apparatus may comprise temperature responsive means to vary the size of the return port to vary the quantity of excess fuel recirculated and thus the quantity of fuel supplied to the zone.

Abstract: Charge forming apparatus of the fluid jet type in which the tubular supply member is acutely angled with respect to the housing passageway and the slot therein is located closely adjacent to the passageway wall and to a location of initial opening of the pivoted butterfly valve in the passageway which controls the air flow across the slot and through the passageway.

Abstract: A mechanical seal assembly adapted to be associated with a rotatable shaft and a housing and having a rotatable seal ring and a stationary seal ring, each having seal faces which engage seal faces on a central seal ring, the latter seal ring being centered only on its outer diameter and being free to rotate relative to the other seal rings thus reducing the speed at the seal faces to the intermediate speed. An aspect of the disclosure is a double spring system wherein seal ring means associated with a shaft and a housing are urged toward one another.

Abstract: A three-phase accessory drive system associated with the engine of a vehicle and providing a high ratio drive phase from vehicle engine idle to a first predetermined engine speed, a substantially constant speed drive phase above the first predetermined engine speed to a second predetermined engine speed and a low ratio drive phase above the second predetermined engine speed. The accessory drive speed is also temperature compensated.The drive system comprises the combination of a planetary gear set, a friction brake, a friction clutch and a hydraulic system operatively associated with the brake.

Abstract: A drive coupling for selectively disengaging a driving shaft and a driven shaft upon rotation of the driving shaft in one direction. The coupling comprises a pair of one-way clutches and a one space ratchet means so arranged to couple the shafts when the driving shaft is rotating in the normal direction and to uncouple the shafts upon the opposite rotation of the driving shaft. The coupling device is capable of remote operation as by reversing the current flow to the motor.Such a device provides a convenient means for coupling and uncoupling pump stages in a submersible pump thus permitting adjustment of the performance of the pump by the addition or subtraction of pump stages without pulling the entire assembly from the well.

Abstract: A remotely operable drive coupling for selectively engaging and disengaging a driving shaft and a driven shaft operable in accordance with the direction of shaft rotation. The coupling comprises a splined axially movable member connected to the driven shaft and having a screw-threaded bore, and a screw-threaded terminal part on the driving shaft adapted to be threadably received in the threaded bore when the driving shaft is rotated in one direction and the axially movable member is urged toward and in engagement with the terminal part of the driving shaft coupling the two members. Upon rotation of the driving shaft in the opposite direction, the parts become unscrewed and the axially movable part is resiliently urged away from the driving shaft uncoupling the members.The device can be controlled hydraulically, pneumatically or electrically.

Abstract: A two stage compressor and the like which comprises first and second stage impellers, an inlet to and an outlet from each impeller stage, a crossover passage means from the first outlet to the second inlet located crossing the first inlet, adjustable guide vanes in the first inlet and fixed de-swirl vanes in the first outlet, the inlet to the second stage impeller being located radially inwardly to that of the first stage impeller.