Abstract: An operating device selectively connects and disconnects a first operating system with a second operating system. The first operating system has a frequently used operating piece, such as a brake lever. The second operating system would conventionally have an infrequently used operating piece, such as a starting lever. Switching means selectively connects and disconnects the first and second operating systems so that the systems may be operated simultaneously or separately by the operation of a single operating piece, such as a brake lever.

Abstract: In a tank immersion heating system a conical casing surrounds the high intensity fuel burner with its narrower end communicating with the immersed tube to introduce combustion air with progressively increasing velocity so that although flame "lift-off" is avoided combustion takes place mainly within the tube.

Abstract: A wood burning stove having an enclosure in which is located a first, V-shaped baffle plate extending horizontally from the front wall of the enclosure but spaced from the rear wall thereof, a second flat baffle plate having a rear edge in engagement with the rear wall of the stove enclosure and extending across the enclosure with the front edge thereof spaced from the interior of the front wall of the stove to define a vent space leading from the rear of the enclosure over the top of the V-shaped baffle plate, up the front wall and then back towards the rear wall over the top of the second, flat baffle plate to a flue opening, side air channels are provided to heat room air.

Abstract: The invention comprises an actuating lever assembly for the actuation of an adjustable member in a mechanical assembly, in particular, an adjustable member in a heating and ventilating assembly in a motor vehicle the lever assembly comprising: a support frame including a support surface and a guide means arranged substantially parallel to, and spaced apart from, said support surface; a movable actuating lever supported in said frame, one end of said actuating lever having a curved shape engageable with said support surface in such a manner that said actuating lever is both supported by, and can roll relative to, said support surface, between predetermined limits, on the application of force to the other end of said lever; guide means on said lever adjacent the center of curvature of said curved end and slidably engageable with said guide means on said support frame; and a connection point on said lever for the attachment thereto of a mechanical linkage between said adjustable member and said lever, which conn

Abstract: The present invention teaches a high-speed indexing system for use with any number of fabric-moving apparatus, a novel braking system for use within the indexing system, and a novel puller accessory. The high-speed adjustable indexing system is illustrated in connection with a sewing machine, as an example. In sewing machine applications, a synchronized intermittent advancement of fabric in unison with the movement of an associated feed dog is provided. Undesirable inertia-caused roller overshooting, heretofore treated with anti-reverse clutches and other approaches, is eliminated, thereby enabling high speed indexing at machine operating speeds conventionally unattainable in the art. An adjustable spring-biased braking arrangement is provided which may be preset for known machine operating speeds.

Abstract: An indirect air heater having a single airflow path, the invention provides apparatus capable of discharging large volumes of heated air either toward outdoor work areas or into indoor spaces. The present heater is disposed outdoors, fresh air being taken into the heater and passed in heat exchanging contact with heated combustion products moving in a non-communicating flow within the heater. The heated fresh air is directed toward or into the space to be heated while the combustion products are vented to ambient.

Abstract: A combined chimney cover and damper comprising an elongated sleeve having a closed end defining the cover and an open end supported within the chimney, support means extending laterally from the sleeve and engageable with the top of the chimney to support and maintain the cover and damper in operative relation to the chimney, at least one aperture in the sleeve between the support means and the closed end of the sleeve, a damper normally resiliently urged upwardly within the sleeve against its closed end to cover the aperture, and means for moving the damper across the aperture to establish communication between the interior of the chimney and the atmosphere. The cover preferably includes a flange spaced horizontally outwardly from and at least partially overlapping the aperture to protect it against wind blown rain and snow.

Abstract: An adapter for reciprocal lever friction drive mechanism comprises one first element as driven-driver, and one second element as the driver. The adapter consists of a pair of mechanism, one fixed at one end of the drive shaft, and the other fixed at the other end of the drive shaft, on which means of transmission of power generated is fitted. Each first element has a band shell for cylindrical friction drive engagement means fixed to it. Adjacent to each first element is disposed a second element coaxial with the first element. Each second element consists of a plural number of links pivoting about the drive shaft, and connecting with cams substantially engaging the cylindrical friction drive engagement means, and the cams pivoting on pinshafts disposed on the links.

Abstract: A hydropneumatic one-tube vibration damper in known fashion comprises a cylinder and a displaceable piston separating the cylinder space into a chamber containing a hydraulic fluid and a chamber containing a pneumatic fluid. This piston carries an annular elastomeric sealing element comprising an inner portion clamped by said piston, an outer portion contacting said cylinder and an intermediate web portion, whereby small displacements of the piston can be accommodated by flexing of said web portion without displacement of said outer sealing element portion relative to said cylinder. Reinforcements may be embedded in the outer portion of the sealing element to increase its contact pressure against the cylinder and means may be provided to prevent canting of the piston in the cylinder.

Abstract: The angular or rotative position of a sprocket wheel may be incrementally adjusted through the appropriate manipulation of a pair of spaced-apart, opposed wedge assemblies mounted on the wheel that capture a crank of the shaft so that by inching the crank in one rotative direction or the other through manipulation of the wedge assemblies, the rotative relationship between the wheel and the shaft is changed. Each wedge assembly includes a pair of relatively shiftable components having interengaging cam surfaces, one of such components having an arcuate surface that is received in slidable, mating engagement by a complementally formed recess on the proximal side of the crank, thereby permitting relative rotational movement between the crank and the wedge assemblies so as to accommodate the swinging or arcuate nature of the crank movement during adjustment.

Abstract: A gas turbine engine has an internal drive shaft including one end connected to a driven load and an opposite end connected to a turbine wheel and wherein the shaft has an in situ adjustable balance system near the critical center of a bearing span for the shaft including two 360.degree. rings piloted on the outer diameter of the shaft at a point accessible through an internal engine panel; each of the rings has a small amount of material removed from its periphery whereby both of the rings are precisely unbalanced an equivalent amount; the rings are locked circumferentially together by radial serrations thereon; numbered tangs on the outside diameter of each ring identify the circumferential location of unbalance once the rings are locked together; an aft ring of the pair of rings has a spline on its inside diameter that mates with a like spline on the shaft to lock the entire assembly together.

Abstract: A stand for supporting and rotating shafts in fractions of a revolution, for example for assembling armature slot conductors. Conventional arrangements use multiple rollers conforming to the shaft, one of which is motorized by way of gearing. This tends to be cumbersome, expensive and complex. According to this invention a shaft is supported on the walls of a channel between roller stops. A lever within the channel is jacked up to tilt the shaft against one roller and the lever is pushed longitudinally, allowing the shaft to remain in position but rolled around against the stop by an amount corresponding to the linear lever movement. The lever is then lowered and retracted.

Abstract: A hand-operated multi-purpose tool mounted on a stand having a projecting support, with a movable tool assembly attached to the support. A pivotal handle is coupled to the tool assembly, the handle reciprocably positioning a plunger having at least one flat edge surface, the plunger passing through a triangular guide member in the tool assembly and being adjustably clamped thereto by means of a clamping plate bearing against the plunger flat surface. A plurality of different tools, jigs and fixtures may be attached to the reciprocable plunger for numerous working functions.

Abstract: A low tolerance device for converting the rotary motion of a motor shaft into linear motion for use in influencing the stitch bight and work feed mechanisms of a sewing machine. The shaft of a motor is provided with a worm rigidly attached thereto. Two half nut sections are clamped around the worm and are urged against it by a leaf spring. The half nuts are connected to a drive arm by a pin which freely passes through one half nut and the drive arm and is rigidly connected to the second half nut. The leaf spring acts as a guide for the half nuts and prevents their rotation about the worm. Rotation of the motor in either direction causes the half nuts to translate along the axis of the worm. The translation of the half nuts is transferred to the drive arm through the pin.

Abstract: The invention relates to a crank drive, particularly to a crank drive for photographic cameras having a crank including a crankpin, and a drawbar pivotable about the crankpin. The drawbar consists of first and second rods connected to one another, and disposed in respective substantially parallel planes, which rods are joined or connected by a hinge having a hinge axis substantially parallel to the crankpin axis.

Abstract: A device or mechanism which converts rotary motion into linear motion. The mechanism is well adapted for converting rotary movement of a pulley which is driven by a stepper motor responsive to signals from a computer into linear motion of a magnetic head. The magnetic head is mounted on guides for linear movement with respect to a record. A flexible metal band is wrapped around and attached to the driven pulley, the ends of the band extending tangent to the pulley and parallel to each other, the ends being secured to the block or carriage carrying the magnetic head. Angular movement of the pulley tends to unwrap one end portion of the band and to wrap the other portion thereby moving the block carrying the head linearly.

Abstract: A drive unit for use with extrusion devices having counter-rotating double screws with parallel axes overcomes problems with loading of the bearings of such units.The drive unit has an integral drive and output shaft with a pinion mounted on the output shaft. Two cog wheels or gears mesh with the pinion on opposite sides thereof and one of the cog wheels is mounted on a second output shaft. The other cog wheel acts as an intermediate gear wheel and both cog wheels mesh with an internally toothed hollow gear wheel or ring gear. By making the diameter of the intermediate gear wheel greater than the diameter of the pinion, conventional bearings can be used.

Abstract: A flight control system utilizing pilot actuated flexible cables to selectively move a control quadrant and utilizing balanced, preloaded springs connected to the quadrant to be selectively automatically releasable in response to cable severance so that the quadrant can be pilot actuated through its full control regime despite the severance of one of the cables.

Abstract: An anti-differential device for a differential mechanism comprising a constricting guide surface circularly disposed about the side gear hub of the differential mechanism and a constrictable guide follower laterally displaceable by the side gear in side-thrusting response to loading of its axle, to simultaneously radially engage the differential casing and the side gear hub in mutually binding relation, against their relative rotation.

Abstract: Excursion mechanism for rotating a large rotating disc member having a column upstanding therefrom at an outer portion thereof, the column being permanently affixed thereto. The column supports an X-ray source and camera for radiographing a patient's dental arch area. The column circularly orbits about the patient seated in a patient chair which rests on a stationary platform disposed above the large rotating disc member. A sprocket is rotatably mounted on the rotating disc member. A belt articulates between the sprocket and the stationary patient platform such that rotation of the sprocket through external motor means causes the large rotating disc member and column to orbit the patient.