Abstract: The invention is a variable speed transmission for adjusting the output of a drive shaft. It comprises a journal mounted rotatable casing with an internal cyclical periodic track selectively pushed by a plurality of reciprocating push rods activated by a variably extendable cam mounted to a drive shaft. The torque ratios are directly proportional to the degree the push rods are extended by the extendable cam.

Abstract: A mechanical drive mechanism is designed for imparting pivotal motion to the frame arm or walking beam of a mineral jig. Rotary cam action is employed to mechanically pivot the walking beam or frame arm which supports a cone and flexible diaphragm at one end for imparting jigging action to the jig bed. Adjustment features are preferably provided to enable the amplitude of the reciprocating motion imparted to the diaphragm and cone to be selectively varied. In the preferred embodiment, the cam is constructed to be pivotal when at rest for enabling the amplitude of the camming action, and correspondingly the pivot stroke, to be varied.

Abstract: The invention is a poppet valve arrangement with a follower member rotatable with a drive shaft about the axis of rotation of the shaft. The follower member is rotatable within a hollow cam member having an internal cam profile with which the follower member is held in contact. Either the follower member or the cam member is capable of limited linear movement in a direction transverse to the axis of rotation of the shaft, and either of the follower member or the cam member is coupled to the poppet valve so that rotation of the shaft is translated into movement of either the follower member or the cam member and thereby into linear movement of the poppet valve.

Abstract: An alignment fitting for implements such as buckets and hammers, which are to be removably attached to a bachhoe. The invention includes a pair of cylindrical bosses, which are affixed to opposing apertures in mounting flanges on the implement. A cylindrical bushing is rotatable inside each boss. A pin is placed through an eccentric bore in each bushing, and through the backhoe dipperstick. The eccentricity of the bushings allows the bushings to compensate for misalignment that may occur in the implement or the backhoe dipperstick. The invention may also be used with a hitch to provide greater tolerances when nonstandard size implements are attached.

Abstract: A speed reduction device for transmitting the rotation of a drive shaft to a driven shaft in a speed reducing manner. An eccentric cam is securely mounted on the drive shaft and has a central axis eccentrically offset from a central axis of the drive shaft, and the driven shaft is rotatably mounted in eccentrically offset relation from the drive shaft by an eccentricity equal to that of the eccentric cam. The driven shaft includes a pair of opposed surface portions which are adapted to rotate in a normally clamping and circumscribing relation with respect to the eccentric cam. When the speed reduction device is used in an intake and exhaust valve timing and actuating device of an internal combustion engine, a crank shaft serves as the drive shaft, while a follower cam associated with intake and exhaust valves serves as the driven shaft.

Abstract: An injection pump for supplying fuel to an internal combustion engine includes a plunger coupled to a cam follower which can be moved in one direction to effect fuel delivery by a multi lobed cam. The plunger is returned following fuel delivery by a return mechanism including two levers one of which carries a roller engaging the cam and the other of which engages the plunger. An adjustment shoe is carried by the one lever and is engaged by the other lever to enable adjustment of the backlash in the mechanism.

Abstract: An apparatus for cyclically actuating an actuation member comprises a hollow shaft rotatable about an axis of rotation and defining therein a cam opening therethrough, an inner shaft rotatably carried within the hollow shaft, a cam member fixed to the hollow shaft adjacent the cam opening, a cam member fixed to the inner shaft and projecting through the cam opening of the hollow shaft, a variable transmission having a reference element connected to one of the shafts and an output element connected to the other of the shafts, and an input element; a pulley wheel connected to the shafts for rotating same about the axis, and an electric motor connected to the input element of the variable transmission for rotating same, the electric motor being controlled by an electronic control unit which can include one or more microprocessor units.

Abstract: A hydraulic radial piston machine with steplessly adjustable volumetric displacement and piston stroke has a bank of pistons with axes in a common plane transverse to the shaft and machine axes. A radially displaceable supporting member pivotably connected to a shaft longitudinal portion turnable from the machine longitudinal axis supports the pistons. The longitudinal portion is pivotably connected at one end to a further longitudinal shaft portion. The second end connects to a turning link transmission which rotates. Rotation of the first--mentioned longitudinal shaft portion causes the supporting member to travel a circular path around the machine axis. A force--loaded translating operating displacing member steplessly varies the diameter of this circle to steplessly adjust piston stroke.

Abstract: An engine driven camshaft cam is driven in a manner to superimpose a variable oscillation on the cam as it is rotatably driven in order to vary the period during which an associated valve is opened, the drive including an engine driven gear or sprocket journalled in a block whose axis is displaceable transversely to the axis of the cam, a slider member secured for rotation with the gear and guided for linear radial movement relative to the gear or sprocket, and a rack on the slider member engaged by a pinion coupled to the cam for oscillating the cam relative to the camshaft upon sliding movement of the slider in response to eccentrically displacing the axis of the gear.

Abstract: A cigarette pack accumulator assembly utilizes a rotating pack accumulating drum having a plurality of cigarette pack accumulating columns equally spaced about its periphery. Each such column guides a pack support pedestal for movement either downwardly during pack accumulation, or upwardly during pack discharge. A lead screw is rotatably supported within the accumulator drum and can be driven at varying speeds and directions to either raise or lower the pack support pedestals. Packs of cigarettes may be removed from a production line and accumulated, they may be stored, or they may be removed from the accumulating columns and returned to the production line.

Abstract: A dual position handle and cam stop assembly is provided which is adapted for limiting rotational movement of an associated valve sealing element such as a ball for a ball valve. However, the assembly is applicable to other types of valves such as butterfly and plug valves. The assembly comprises a cam disc and a valve handle having associated first and second handle stop and direction indicators. The indicators are disposed relative to the cam disc for engagement against the disc at first and second handle stop limit locations, respectively. The locations are selectively positionable by rotation of the cam disc while maintaining a constant relative angular spacing for limiting the rotational movement of the valve handle to the constant relative angular spacing. The cam disc has a cardioid-like contour about its peripheral wall for a constant angular displacement of the stop limit locations per a unit degree of cam rotation.

Abstract: An apparatus for forwardly and laterally indexing a strip provided with an angular blanking pattern along a zigzag path is provided with an adjustable indexing cam mechanism. Forward and lateral indexing assemblies are provided as an integral unit whose operation is synchronized with that of a strip processing machine by means of a direct drive arrangement. The extent of lateral indexing is adjustable by altering the degree of eccentricity of a master cam plate provided within the indexing cam mechanism. The indexing cam mechanism provides the apparatus with dwell periods within which the strip is subjected to one or more operations, for example, blanking, with the dwell periods being independent of the degree of eccentricity of the master cam plate.

Abstract: A drag control for a spinning reel includes a disc that rotates with the main shaft. A primary drag plunger is moved against one side of the disc to establish the preset drag. The secondary drag plunger directly opposing the primary plunger is mounted on a cam follower, and a hand-operated cam moves the follower selectively toward or away from the disc. The cam is tapered from side to side so that a different range of movement will be imparted to the cam follower, depending upon the circumference of that portion of the cam engaged by the cam follower.

Abstract: An adjustment device for a latching mechanism for releasably joining and locking together two separate modules located on a flat surface. The latching mechanism includes a first module having a pair of lower fingers projecting therefrom and a pair of upper angular, locking members projecting therefrom, a second module having a pair of lower apertures for locking engagement with the pair of lower fingers and a pair of upper apertures for locking engagement with the pair of upper, angular, locking members and a cam rotatably mounted in the lower portion of the first module. The cam has a shape such that rotation of the cam is effective to lower the first module onto the second module to thereby join the two modules and continued rotation of the cam is effective to urge the second module upwardly against the first module to thereby rigidly lock together the two modules.

Abstract: A mechanism for controlling the travel, velocity and stroke distance of a ram as used in punch and draw presses, and riveting machines, and a lever as used in automatic screw machines, feed mechanisms and indexing machines. In each embodiment the ram/lever is rotatably attached to a cam follower. When the mechanism is in the idle mode the cam follower is at rest in the idle area keeping the ram/lever motionless while the cam rotates. When the work mode is selected an escapement guide is actuated, causing the cam follower to transfer from the idle area into a cycloidal work groove intersecting the idle area. The work groove is configured to produce ram/lever motions commensurate with those required for the specific work piece. The mechanism uses fewer parts than are presently required for conventional machines is easier to maintain, more reliable and requires less power to operate.

Abstract: A conveyor cam adjusting apparatus permitting adjustment of the radial position of each cam on a drive shaft while it is rotating. A plurality of individual electric motors are mounted for rotation about a common drive shaft each motor being associated with a single cam. Each motor is provided with a means for manually selectively connecting it to a control means in order to enable an operator to rotate the associated cam relative to the common drive shaft while the shaft is rotating. A sensing means may be used to detect the position of each cam relative to a predetermined reference position and the output of the sensing means may be used by a computer control means to automatically selectively activate each motor to adjust the associated cam accordingly.

Abstract: A switching control device having a plurality of displaceable fingers programmable for controlling a sequence of switching operations in a time-controlled system has a magnetic element for exerting a magnetically retentive force on displaced fingers to hold the displaced fingers in displaced or programmed position, and permitting easy release of a displaced finger upon cancellation of a program so that the finger can return to an unprogrammed neutral position. The fingers may be mounted in a control disc having a permanent magnet or an electromagnet, the control disc functioning as a magnetic yoke, or the fingers themselves may be magnetic.

Abstract: A gripper opening/closing apparatus in a sheet-fed rotary printing press, the apparatus having a broadside printing cam and a perfecting cam which are commonly brought into contact with cam followers, and which are adjacent to each other to be coaxial with an impression cylinder, and the apparatus being arranged such that, in a broadside printing mode, grippers of the impression cylinder are opened/closed by the broadside printing cam to cause reversing grippers of a reversing cylinder to grip a leading end of a printed sheet gripped by the grippers of the impression cylinder, and that, in a perfecting mode, the grippers of the impression cylinder is opened/closed by the perfecting cam and the broadside printing cam to cause the reversing grippers of the reversing cylinder to grip a trailing end of the printed sheet gripped by the grippers of the impression cylinder, wherein a central angle of the impression cylinder which is formed between a sheet gripping position where the grippers of the impression cylind

Abstract: A control assembly (50) for deployment of aircraft wing flaps is comprised of an input cam mechanism (54), a feedback cam mechanism (56) and a summing lever member (58) operatively interconnecting the cam mechanisms for mechanically summing independent inputs therefrom to yield a mechanical output signal for actuating flap deployment drives, wherein the input cam mechanism is comprised of a cam (64) rotationally operable in response to a command input signal and a cam follower (68) in mating engagement therewith for cammed movement with rotation thereof to provide a first input signal to the summing lever characteristic of a predetermined flap configuration, the feedback cam mechanism is comprised of a cam (94) rotationally operable in response to movement of the flaps and a cam follower (100) in mating engagement therewith for cammed movement in response to movement of the flaps to provide a second input signal to the summing lever characteristic of the existing flap configuration; and further wherein the su

Abstract: A key forming machine including a machine frame, key cutting means mounted on the machine frame and operable to cut bittings of preselected location and depth into a key blank to form a key, and a carriage assembly adapted to carry a key blank and mounted on the machine frame for movement for presentation of the key blank to the key cutting means. First and second indexing mechanisms ar mounted on the machine frame and operable to move the carriage assembly, for presentation of a carried key blank to the key cutting means, to indexed positions respectively corresponding to preselected bitting locations and bitting depths. The indexing mechanisms each include an interengageable cam element and follower element, each cam element defining at least one series of discrete land portions representative of the indexed positions of the carriage assembly.

Abstract: A continuously variable cam mechanism designed to change the opening and closing characteristics of the cam operated intake and exhaust valves of an internal combustion engine as a function of engine speed. A cam on the camshaft is split into two adjacent cam pieces forming a single effective cam. The two cam pieces rotate around the camshaft in opposite directions to enlarge or reduce the profile of the combined cam lobe. Each cam piece carries a track follower which engages one of two oppositely directed spiral tracks carried by the camshaft, so that as the camshaft is made to move longitudinally with respect to the longitudinal position of the cam pieces, as a function of engine speed, the cam pieces are rotated about the camshaft in opposite directions.

Abstract: Apparatus is disclosed for controlling the angular position of a drive wheel on a driverless vehicle. The apparatus includes a speed control device movable between two positions and having a lost-motion coupling to a shock absorber so that the device moves rapidly toward the second position for part of its movement and then moves slowly for the remainder of its movement.

Abstract: A heated sealing tool is actuated intermittently for fixed intervals of time to engage thermoplastic envelopes of successive cigarette packs which are supported by an indexible turret. In order to ensure that the intervals of engagement between the tool and successive envelopes are not altered when the speed of the prime mover of the packing machine is changed, the tool is mounted on one arm of a two-armed lever the other arm of which carries roller followers for two discrete coaxial cams which jointly actuate the tool through the medium of the lever. Each of the cams is driven at a speed which is proportional to the speed of the prime mover; however, one of the cams is angularly adjustable relative to the other cam by a gear motor or a bevel gear transmission in response to signals which denote changes in the speed of the prime mover so that the duration of intervals of engagement remains unchanged.

Abstract: A cam apparatus is disclosed which has a cam profile which is varied by axially moving the drive shaft. Two cam members on the shaft form a cam lobe. Guide bodies mounted in the shaft engage slanted grooves on the inner walls of the cam members, so that axially moving the drive shaft turns the cam members. In one embodiment, the cam members may meet in the area of the cam lobe when the cam lobe is narrow, and may be spaced apart when it is wide, or they may overlap when it is narrow and provide a continuous profile when it is wide.

Abstract: A mandrel assembly for use in a machine for continuous printing of cylindrical containers, comprising a mandrel wheel; mandrel holders, pivotally mounted on circumferential portions of the mandrel wheel; elongate mandrels for supporting cylindrical containers on peripheral surfaces thereof, rotatably mounted on the mandrel holder and radially displaceable relative the central axis of rotation of the mandrel wheel; a cam follower rotatably mounted on each mandrel holder; and a cam track assembly operably associated with the cam followers for causing preselected radial displacement of the cam followers with respect to the central axis of rotation of the mandrel wheel which in turn causes preselected radial displacement of associated mandrel spindles relative a blanket wheel device to either cause a container to be printed or to be skipped from printing.

Abstract: A cylinder stop or collar includes a pair of identical mating cam members. Each cam member has a body and a pair of ramps which define cam surfaces. The ramps have slots for receiving attaching means such as bolts. Each cam member also has a slot so that it may be slid on and off the rod of a cylinder without disconnecting the cylinder.

Abstract: In apparatus for transferring articles through a series of processing stations, a multistroke feed mechanism is operatively connected to a feed member which reciprocates for causing the transfer of the articles. The multistroke feed mechanism comprises a set of disc cams having lobes of different radii and splined to a camshaft for joint rotation therewith and sliding motion in its axial direction. A cam follower lever is arranged for abutment against any selected one of the disc cams thereby to be oscillated through a corresponding angle. For causing the axial sliding motion of the disc cams over the camshaft, a sleeve is fitted over the camshaft and secured to the cams for axial motion therewith. Formed between the camshaft and the sleeve are a pair of opposed fluid chambers for moving the sleeve to any desired position where a selected one of the disc cams is engaged by the cam follower lever.

Abstract: For use in a printing machine, such as an office typewriter, employing a replaceable printing head to be mounted on a carriage, there is provided a printing head fastening arrangement for releasably clamping the printing head to the carriage and permitting adjustable spacing of the printing head relative to the cooperating print support for containing the recording medium. The inventive arrangement enables the fastening and adjustment function to be integrated such that both functions can be carried out in one step. To this end, a rotatable pin is disposed upstanding from the carriage and provided with an operating element, which is resiliently seated relative to the printing head, for selectively engaging against a support surface formed on the printing head to clamp the printing head against the carriage.

Abstract: A switching mechanism has disc cams arranged on a shaft for actuating switches positioned beside the shaft. The cam discs are adjusted exclusively by friction contact between these cam discs and at least one supporting member. The friction surfaces are held in contact with each other under pressure from a plate spring which is positioned outside of the pair of cam discs. The tension of the plate spring is selected so as to be great enough to ensure that the cam discs do not rotate relative to the shaft unintentionally, particularly when subjected to accelerations and impacts during operation. The tension is, however, at a level which allows a sliding adjustment of the cams with the use of a tool. The tension is preferably determined by the rate of the plate spring and a fixed axial spacing in which it is confined. This spacing is set, in the preferred form, by the length of a bushing of one support member that abuts an adjacent cam unit or an equivalent stop member.

Abstract: A rotary switch comprises a control shaft rotatable clockwise from a neutral position to a first switch actuating position and beyond it to an overtravel position, and counter-clockwise to a second switch actuating position and beyond it to another overtravel position; a centering arrangement for biasing the control shaft to its neutral position; first and second switch mechanisms; a housing enclosing the switch mechanisms; and a switch actuating arrangement. The latter arrangement includes a pair of cams mounted on the control shaft, a pivotally-mounted blade for actuating the first and second switch mechanisms, and first and second cam followers formed on the blade for slidably contacting respective ones of the cams. The cams are preferably formed as plate cams each having a cam finger that is bendable in the circumferential direction, in relation to the control shaft, to adjust the contact position thereof on the respective cam follower.

Abstract: An improved adjustment mechanism for adjusting the maximum flow rate of conditioned air in an air distribution system controlled by a pneumatic control circuit. An air bladder controls the distribution of air, and the pressure is bled from the bladder under the control of a diaphragm against which pressure is fed back from the downstream side of the bladder. The control orifice through which the bladder pressure is exhausted is formed in the end of an exhaust tube that is axially adjustable. A cam and set screw arrangement provides a field adjustment for the exhaust tube to move the control orifice toward and away from the diaphragm for adjustment of the maximum flow rate. The cam has three point contact provided by a pair of feet and a second set screw which permits adjustment of the inclination of the cam surface. Rocking of the cam is prevented by a spring which counters the force applied to the cam by the first set screw.

Abstract: The disclosure is of a control mechanism including a rockshaft carried by a support and itself having fixed thereto an upstanding rocker element. A cam is disposed alongside the rocker element, having a lower end formed with an opening that loosely embraces the rockshaft so as to enable relative movement of the cam within at least the limits of the opening. Lost-motion means interconnects the rocker element and cam for rocking of the two in unison about the rockshaft axis while permitting the aforesaid limited movement. Adjusting means is provided between the cam and rocker element for achieving adjustment of the cam relative to the rocker element while retaining the floatability or relative movement of the cam.

Abstract: An adjustable cam arrangement is provided for controlling various work handling elements of a multistage press. Releasable cam disc members are mounted on a camshaft for actuating a respective cam follower associated with a work handling element. The cam disc members are drivingly coupled to the camshaft in response to a supply of fluid pressure. The cam disc members contain a pair of cam discs adjustable by a motor for independently rotating the cam discs relative to the camshaft for varying the duration and timing of work handling elements.

Abstract: An operting handle assembly for actuating a valve or the like including an adjustable actuating cam member that controls the degree of deflection of the valve to obtain different output pressures for a given handle position, for example, and an adjustable friction brake mechanism that sets the desired tension for handle operation.

Abstract: A carburetor for connection to an internal combustion engine having a housing provided with a mixing passage for the flow of air to the engine; a throttle at the downstream end of the passage; a fuel spray bar extending transversely across the passage upstream of the throttle having transversely oppositely disposed fuel orifices facing the walls of the passage; a pair of venturi plates mounted for pivotal movement about individual axes upstream of the bar and spaced oppositely and transversely from the bar, the plates having distal ends and pivoting between closed, convergent positions in which the distal ends are adjacent to the bar and open positions in which the plates diverge from the bar, thereby defining an adjustable throat; a source of fuel; a conduit interconnecting the orifices and the source; a plunger-actuated valve in the conduit for controlling the flow of fuel from the source; a rotationally mounted cam adjacent to the valve having a cam surface in controlling relation with the valve; and a lin

Abstract: A cam assembly is disclosed which is used for the selection of different track positions for a magnetic tape head in a magnetic tape player/recorder. The tape track position of a magnetic tape head is determined by the position of a cam follower member which is selectively positioned with respect to a reference surface by selectively positioning a number of different diameter ball bearings between the cam follower member and the reference surface. Specifically, a solenoid actuated armature causes the linear movement of pawl members which in turn rotate a ratchet wheel member. The ratchet wheel member forms part of a cam apparatus that includes four ball bearings of different diameters. Sequential rotation of the ratchet member selectively positions ball bearings of different diameters between a non-rotatable reference surface and the cam follower member.

Abstract: The ejector pin for ejecting a workpiece from a die of a stamping machine is actuated by means of a cam shaft oscillated back and forth on the machine frame through less than one revolution, a radial cam mounted on the shaft, and a motion transmitting rocker carrying a cam follower. The stroke of the ejector pin can be set by angularly shifting the position of the cam on the shaft, the angular length of the cam shaft being greater than the angular spacing of the terminal shaft positions. The portion of the cam face first engaged by the cam follower during the working stroke of the ejector pin spirals uniformly outward from the cam shaft axis to an outermost position which is reached before the cam shaft movement stops.

Abstract: For maintaining a predetermined pressure at a controlled pneumatic device, a unit of this invention has a body with an inlet port connectable with a pressure gas source, an outlet port connectable with said device, a pressure chamber at all times communicated with the outlet port, and an annular valve seat through which gas can flow from the inlet port to the pressure chamber. The position of a valve element that throttles gas flow through the valve seat is controlled by a diaphragm having one surface exposed in the pressure chamber and a helical compression spring having an inner end bearing against the opposite diaphragm surface. A cam rotatably supported on the body controls the position of the other end of the spring, for quick stepless adjustment of spring preload and thus of outlet port pressure. An eccentric bushing enables calibrating adjustment of the position of the cam axis for either a maximum or a minimum outlet port pressure.

Abstract: A mechanical memory device comprising (a) a bar, (b) means supporting the bar for substantially linear movement, (c) input means for linearly moving the bar to plural selected positions, and (d) plural bar position sensing and actuating means, each having means for sensing a selected position of the bar, for storing the sensed bar position and for actuating the bar to cause it to occupy the position thereof corresponding to the stored position.

Abstract: The metering device comprises a roller having a plurality of parallel grooves spaced equidistantly around the circumference of the roller and extending across the entire width of the roller, and drive means for rotating the roller. The grooves are of uniform width and depth, and extend radially inwardly from the outer peripheral surface of the roller. A block of approximately the same width and length of each of the grooves is mounted for reciprocating movement in each of the grooves. As the roller is rotated each block is reciprocated radially of the roller within its groove by the interengagement of cam rollers projecting from each end of each block and cam tracks mounted adjacent opposite ends of the roller. Each groove is filled with dough when it is in its upper vertical position and its block is in its lowermost position within the groove. The dough is discharged from each groove on to a conveyor belt as the block within the groove is moved toward the periphery of the roller.

Abstract: A variable drive means for cam-operated intake and exhaust valves in an internal combustion engine, the variation being responsive to changes in load and rpm of the engine while the engine is running and being completely automatic. The disclosed device provides a slip drive for the camshaft, virtually unaffected by wear and with a predictable, constantly damped biasing action making the device suitable for mass production to suit any engine and preventing vibration and rough operation of the engine and giving automatic wear compensation.

Abstract: A combined control device for the operation of coke oven batteries which includes both a part for converting from heating with a strong gas to a lean gas, and vice versa, and a part for switching the regenerative heating system from one group of heating flues to another, comprises a support frame on which is mounted a rotary switching control cylinder and a rotary conversion control cylinder in end-to-end relationship and for rotation around the same axis. The rotary conversion control cylinder is displaceable in respect to the rotary switching control cylinder, and the two cylinders may be coupled together for rotation together or the conversion cylinder may be shifted axially so that it will not rotate with the switching control cylinder. The switching control cylinder is driven at one side from a motor driven transmission which also permits the manual operation of the cylinders.

Abstract: A guide template for sewing machines in which a driven roller follows along the template's contour to sew workpieces of different form and/or size. The template has a number of sections which are movable relative to one another. For purposes of lengthening one of these template sections, a second movable and adjustable template section is provided in combination with a third template section which is pivotably mounted on the second template section. The third template section may be adjusted to different contours by an adjustment device. This adjustment device has a cam plate interacting with the third template section, and mounted rotatably on the machine frame through the use of a handwheel. The second template section is located between the first and third template sections, and is used to extend the template. The second template section is held by a gear rack on a plate on the machine frame, and the gear rack engages a pinion which is rotatable with an adjustment knob for shifting on the gear rack.

Abstract: A variable valve timing mechanism for an internal combustion engine including at least one valve-actuating camshaft driven from a crankshft is described. The valve timing mechanism comprises a movable member which is arranged in use to be rotatable by the crankshaft and movable in translation relative to the camshaft in dependence upon an engine operating condition such as engine load or speed. The movable member is connected to the camshaft by an eccentric linkage such that movement of the movable member relative to the camshaft varies the angular position of the camshaft relative to the crank and also varies the rate of angular movement of the camshaft, thereby varying the valve timing.

Abstract: A workpiece holder for sewing machines in which a plurality of supporting segments are located next to one another and are displaceable relative to each other. These supporting segments have a rim zone at which needles are located. The rim zone, furthermore, supports the edge of a workpiece to be processed. A device which may be lowered onto the workpiece, cooperates with the needles for holding the workpiece on the needle. A contour adjusting device is provided with templates for shifting the supporting segments. The templates have a contour corresponding to the seam to be applied to the workpiece. The supporting segments are, moreover, formed by rails having a U-shaped cross-section with cross bars carrying the workpiece and having recesses for permitting passage of the needles. The latter are arranged on a two-arm lever rotatably supported in each of the supporting segments, and they are held in a position permitting passage through the supporting segments within the recess by means of a spring.

Abstract: A template control for relative movement between a workpiece or material and a tool which may be in the form of a needle on processing machines. The template is adjustable to different shape and/or size of a workpiece which may be in the form of a garment. A roller is pressed against the template which is provided with a coaxially located and driven gear pinion. The pinion meshes with teeth adaptable to the shape of the template for purposes of guiding the roller without slippage along the template. The latter has an elastic tape which determines the shape of the contour. The tape is held in a number of tape carriers arranged displaceably next to one another and parallel to one another. Displaceable tooth segments under tension of a spring, are associated with the tape carriers. These tooth segments when located next to one another, form a gear rack with identical toothing.

Abstract: A device for detecting the absence or improper positioning of detachable elements in their supports comprises a system for monitoring the fitting in position of selected elements on a mounting plate provided at its periphery with slots, these slots being associated with obturating-studs. These studs are retractable from the corresponding slots when a corresponding detachable element is appropriately positioned in the mounting plate which is immobilized by means of a safety locking system comprising an index which can be introduced into this corresponding slot after the retraction of the obturating-stud from it, this index enabling to actuate a safety electrical switch.

Abstract: A cryogenic expansion engine includes intake and exhaust poppet valves each controlled by a cam having adjustable dwell, the valve seats for the valves being threaded inserts in the valve block. Each cam includes a cam base and a ring-shaped cam insert disposed at an exterior corner of the cam base, the cam base and cam insert being generally circular but including an enlarged cam dwell, the circumferential configuration of the cam base and cam dwell being identical, the cam insert being rotatable with respect to the cam base. GICONTRACTUAL ORIGIN OF THE INVENTIONThe invention described herein was made in the course of, or under, a contract with the UNITED STATES ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION.

Abstract: A driving mechanism for transfer finger of bolt forming header wherein the phase of cam of the device can be easily variable. The device comprises a base frame, a drive shaft rotatably mounted on said base frame, a cylindrical holder fixedly mounted on said drive shaft, a pair of clutch cylinders mounted on said cylindrical holder, said clutch cylinders having serrations at one end thereof and recessed and ridged portion at the other end thereof, a pair of cams mounted on said cylindrical holder, said cams having serrations engageable with the serrations of said clutch cylinders, and a pair of clutches mounted on said cylindrical holder at both ends thereof, said clutches having recessed and ridged portion engageable with said recessed and ridged portions of said clutch cylinders.

Abstract: The built-up mainshaft has a plurality of eccentric elements secured to an elongated shaft element in end-to-end angular off-set relationship to each other. Each of the eccentric elements has integral cylindrical body and axially extending sleeve-like portions and an axially extending bore therethrough to receive therein the elongated shaft element. Each eccentric element is scored to render the cylindrical body portion thereof deformable in an inward direction toward the shaft element. A clamping means is provided for each eccentric element to coact with the scoring to effect deformation of the associated cylindrical body portion and secure the latter in torque transmitting relationship with the shaft element.