Abstract: Mechanical transmission manual control device includes a gear control lever (1) which is hinged around a shifting ball (11) to operate a main control connecting rod (2). A lever (12) is solid with the main control connecting rod (2) which operates a transmission control connector (4) carrying a selector (7), the lever (12) working, for selection of the gears, with a reaction link (3) which is connected by its other end (13) to a stationary element (8). There is also provided an element for modification of one of the elements of the kinematic chain which are placed between the knob (14) of the gear control lever (1) and the selector (7), i.e., the control lever (1), the main control connecting rod (2), the reaction link (3), and the control connector (4) to modify the relative position of the knob (14) and the selector (7) in relation to one another.

Abstract: A variable ratio rocker arm is provided for use in combination with the valve stem and push rod of an internal combustion engine. The rocker arm has a toothed rack. A fulcrum rod is provided with a toothed sector and a curved sector. A stationary support member has an elongated slot defined between a rod seat and a toothed rack. The fulcrum rod toothed sector engages the toothed rack of the rocker arm and the toothed rack of the stationary support member. A roller bearing assembly is movably disposed between the rod curved sector and the rod seat, with the roller bearing assembly being rollable along the rod seat. An operating arm is coupled to the fulcrum rod for simultaneously rotating and translating the fulcrum rod along the toothed racks.

Abstract: A bourdon gauge having a connection piece at the end of a bourdon tube for pivotably urging a link which in turn is connected to the arced arm of a sector plate. One end of an adjustment plate is frictionally secured and urged by an adjustment screw near the elbow of an arced arm which is on one end of the sector plate. The other end of the adjustment plate has a slot for slidably urging a rivet to move therein and simultaneously allowing the adjustment plate to turn so as to rotate the sector plate, hence allowing for adjustment of a pointer axle and needle of the bourdon gauge.

Abstract: The invention provides a simple method for reducing the amount of force required to actuate a motorcycle clutch. A miniature, lightweight housing means provides a pivot for a lever means to which is attached a short cable from the clutch actuation handle and also the original cable from the clutch. Because the two cable attachment points on the lever means are staggered, the lever means provides mechanical advantage and thereby reduces the manual force required to move the clutch actuation handle.The invention is designed to allow fast installation by providing cable slots in all parts and using cable sleeve tension to permit simple hook-on attachment of cable terminal hardware to the lever means. The housing means cover is used to exclude the environment and also to assure mechanical strength. The pivot pin and attachment hardware for anchoring the cables is locked into place by the covers.

Abstract: An adjustment assembly for a throttle cam includes a mounting area on the throttle cam in which a hole is provided. A cam adjustment is provided which includes a base plate in a cylindrical shoulder extending from the base plate with the throttle cam being mounted on the shoulder. The shoulder is provided with an eccentrically located hole so that rotation of the cam adjustment results in both horizontal and vertical movement of the cam.

Abstract: An improved adjustable control device for multi-lever hydraulic controls on earth-moving equipment, which conveniently and easily positions the control levers to accommodate different operators. The device includes a pair of spaced supports, a pair of axially aligned end members each movably mounted on one of the supports, a main shaft extending between the end members used for pivot mounting of the levers, and a device to adjust the end members on the supports. Parts are positioned and arranged such that end member adjustment moves the main shaft vertically, which in turn moves the range of control lever motion force or aft as desired.

Abstract: A supporting apparatus for moving an attachment apparatus, such as a display apparatus, relative to a basic apparatus, such as a printing apparatus, to a desired position for an operator. A vertical shaft for supporting the display apparatus can be shifted from an engaging position to a release position by the rocking operation of an operation member around its supporting shaft through a pivot pin projecting from the bottom portion of the vertical shaft. At the release position, the vertical shaft is allowed free rotation, which in turn sets the display apparatus to the desired swivel position. At the engaging position, a swivel positioning means is enabled so as to prevent the rotation of the vertical shaft, thus fixing the display apparatus at the set swivel position.

Abstract: Herein disclosed is a wiper which can selectively assume a "semi-concealed mode" and a "full-concealed mode". The wiper comprises an output gear housed in a case, an output shaft having one end to which a motor arm is secured, a wiper arm assembly including a connecting rod which is pivotally connected to the motor arm, a first mechanism for transmitting rotation of the output gear to the output shaft, a bushing rotatably housed in the case and having an eccentric bore through which the output shaft is rotatably passed, a second mechanism for locking the bushing to one of the case and the output gear while changing relative angular positioning between the bushing and the output gear, and a push button arranged on the case and actuating the second mechanism when manipulated.

Abstract: A flexure acts as an interface for mounting a precision sensing device to a support having a different coefficient of thermal expansion. The flexure, which has substantially the same coefficient of expansion as the device, engages the support along an annular contacting surface to restrain the flexure from relative slipping movement under thermal stress. The sensing device is carried on a base of the flexure and therefore remains aligned during thermal cycling. In a preferred embodiment, the contacting surface provides tight surface-to-surface contact with a complementary surface of the support over an operating temperature range.

Abstract: A quick release hitch for attaching an implement to the arm of a hydraulic excavator comprises a pair of pivotted links, each link having a jaw for engaging a pin on the implement; the links can be jack-knifed to engage or disengage the implement; and locking structures are provided for locking the links together when the implement has been engaged. Preferably, the locking structure is a rotatable cam and/or over-center mechanism.

Abstract: A tiltable steering column for an automotive vehicle includes a main steering shaft made up from a lower steering shaft and an upper steering shaft tiltably rotationally connected to the lower steering shaft, and a column tube assembly which includes a lower tube which rotatably supports the lower steering shaft from the body of the automotive vehicle and an upper tube which rotatably supports the upper steering shaft and is pivotally mounted so as to be able to tilt relative to the lower tube. A tilt locking mechanism also included in the steering column includes a first side ratchet mechanism on one side of the column tube assembly and a second side ratchet mechanism on the other side of the column tube assembly.

Abstract: A tiltable steering column for an automotive vehicle includes a main steering shaft made up from a lower steering shaft and an upper steering shaft tiltably rotationally connected to the lower steering shaft, and a column tube assembly which includes a lower tube which rotatably supports the lower steering shaft from the body of the automotive vehicle and an upper tube which rotatably supports the upper steering shaft and is pivotally mounted so as to be able to tilt relative to the lower tube. A tilt locking mechanism also included in the steering column includes a first side ratchet mechanism on one side of the column tube assembly and a second side ratchet mechanism on the other side of the column tube assembly. Each such side ratchet mechanism includes a ratchet fixedly attached to one of the upper tube and the lower tube, a means which acts constantly for biasing the pawl so as to engage it with the ratchet, and a means for selectively biasing the pawl so as to release its engagement with the ratchet.

Abstract: A variable ratio rocker arm is provided for use in combination with the valve stem and push rod of an internal combustion engine. The rocker arm has an elongated slot defined between a rod seat and a toothed rack. A fulcrum rod is provided with a toothed sector and a curved sector, with the toothed sector being engaged with the toothed rack portion of the rocker arm. A roller bearing assembly is movably disposed between the rod curved sector and the rod seat, with the roller bearing assembly being rollable along the rod seat. An actuator arm is coupled to the fulcrum rod for simultaneously rotating and translating the fulcrum rod through the rocker arm slot. The operating arm causes the fulcrum rod to rotate and translate along the mating toothing from one point of pivotal engagement, corresponding to a first engine operating condition, to another point of pivotal engagement, corresponding to a second engine operating condition.

Abstract: An automatic adjustment apparatus for the brake lever of a vehicle brake with a worm drive, an adjustment mechanism and a one-way coupling. The automatic adjustment of the brake lever on the brake shaft takes place by means of a one-way coupling. When there is a manual adjustment of the brake lever in the direction of the release of the brake jaws, the one-way coupling can be mechanically disengaged.

Abstract: The device for metering a powdered, granular or liquid product, comprises a metering chamber (1) which has a variable volume.The metering chamber (1) comprises a wall (2) which is movable within said chamber. The latter is connected to a lever (4) pivotally mounted on an axis (5). The end of the lever opposite the movable wall (2) is associated with first means (9) allowing the lever to be pivoted about its axis and with second means (10) allowing the ratio of the arms of the lever (4) on either side of its pivotal axis (5) to be varied.For use especially in an apparatus for preparing coffee and for regulating the number of cups and the strength of the coffee.

Abstract: A precessional foot exercising device utilizing a housing containing a spinning mass which forms the rotor of a motor for spinning the mass. The spin axis of the mass is perpendicular to upper and lower surfaces of the housing. A foot plate receives the foot to be exercised. The foot plate is mounted for rotation about two mutually orthogonal axes to provide two degrees of rotational freedom of the foot. The housing is coupled to the foot plate so that the upper and lower surfaces of the housing and therefore the spin axis are rotated by rotation of the foot plate caused by rotation of the foot detachably secured thereto. Rotational movement of the foot is opposed by the gyroscopic effect of the spinning mass, producing an isometric exercise effect when the foot plate is rotated by muscles of the foot while the precessional torque of the spinning mass is opposed by other muscles of the foot.

Abstract: The invention relates to a cylinder and piston unit with a cylinder tube closed at both its ends by cylinder end caps. An axially moving piston in the cylinder has a piston rod extending sealingly through at least one end cap. On the outer face of the tube there are four longitudinal means such as longitudinal ribs or round tie rods extending in the axial direction of the tube and equally spaced in the circumferential direction about the tube. Furthermore there is a mounting yoke for pivotally carrying the cylinder and piston unit and having at least two, and more especially four, generally diametrally opposite clamping jaws with trunnions on two of them. The mounting means furthermore constitutes an annular structure encircling the tube. At their ends the clamping jaws have gripping faces adapted to engage and grip the longitudinal ribs or rods on opposite sides thereof so that the tube is held firmly by clamping the jaws together.

Abstract: A stabilized platform which is suitable for stabilizing the bore-sight of a communications antenna or the like, is provided with a pendulous mounting which holds the structure erect. A pair of gyroscopes give active control of the attitude of the platform, and are coupled to the platform via a gear arrangement. When the platform is rotated rapidly (to unravel feed cables or to permit overhead tracking of the antenna) the gyroscopes experience a much lesser degree of movement which is determined by the gearing ratio, such that the gyroscopes are not destabilized.

Abstract: A rod actuator for an automatic slack adjusting mechanism having a flexible boot seal provided with an enlarged lip, the actuator including a slotted cylindrical-shaped jacket member and a flat rod member disposed within the slot of the jacket member for registration therewith.

Abstract: A carrier for cylindrical hay bales is adapted for mounting on the box of a pickup truck. It includes a shaft pivoted in a support frame about a horizontal axis and a pair of bale lifting arms are mounted to opposite ends of the pivoted shaft. These arms can swing laterally for engaging and disengaging hay bales by means of bale piercing spikes at the outer ends of the arms. A hydraulic system is provided for swinging the pivoted shaft and bale lifting arms from a rearward position adjacent the ground to a forward position adjacent the truck body. For this purpose, two hydraulic cylinders with a special crank arm linkage are used with one of the hydraulic cylinders being capable of swinging the bale lifting arms through an arc of up to about 130.degree. C. and the second hydraulic cylinder being adapted to swing the bale lifting arms through an additional arc of up to about 70.degree. C. Alternatively, a chain and sprocket system driven by a hydraulic cylinder may be used.

Abstract: A tiltable horse-head shaped transmission part at the end of a rocking beam of a cornish type pump drive, is pivotably supported at one end portion of the rocking beam. The rocking beam is pivotably supported on a stationary stand. The horse-head transmission part is mounted in bearing blocks which are shiftable in longitudinal direction of the rocking beam and at the same time are tiltable about an axis which extends parallel to the longitudinal direction of the rocking beam. In this manner an accurate adjustment of the horse-head transmission part relative to a polished rod in the bore hole is made possible so that the polished rod can be accurately guided in corresponding stuffing boxes. The horse-head shaped transmission part is provided with two force application points serving for introducing tilting movement in a backward direction toward a stand and in a forward direction away from the bore hole. The force application points are equipped with fastening means for the attachment of a pulling rope.

Abstract: A brake lever device that permits selective and interchangeable introduction of a Bowden cable to a brake lever via either of the top and base of a hollow housing of the device. To this end, the brake lever of the device is provided with first and second connectors to which an inner wire of the Bowden cable is connected to the brake lever, a first opening is provided at the base of the hollow housing and a second opening provided at the top of the hollow housing, a first retainer, which retains an outer sheath of the Bowden cable while permitting passage of the inner wire, is situated between the first opening of the housing and the first conductor of the brake lever, while a second such retainer is situated between the second opening of the housing and the second connector of the brake lever. Additionally, a covering is provided for covering the second opening when the Bowden cable is introduced via the first opening, but which may be removed for enabling use of the second opening.

Abstract: A turf harvester cutter assembly includes a blade assembly attached adjacent one end of a pair of parallel blade carrying arms. Structure is provided for reciprocating the blade carrying arms at input points opposite the pivot points from the blade assembly to effect cutting by the blade assembly. The blade assembly, pivot points and reciprocation input points are substantially aligned.

Abstract: A transferring mechanism is arranged to transfer parts from one place to another. The mechanism includes a cam lever which is rotated by a cam. A follower lever is rotatable and has a transfer member (e.g., a chuck) mounted at its free end. A connecting structure has a first connection with the cam lever and a second connection with the follower lever in order to transmit rotary motion from the former to the latter. The first and second connectors are slidable along the cam and follower levers, respectively, in order to change the length of the stroke of the transfer member. A displacement mechanism is connected to the connecting structure for moving the latter and its first and second connections. The displacement mechanism is mounted independently of the cam lever and follower cam.

Abstract: A hand lever operated grease gun that has both high pressure and high volume modes by changing the mechanical advantage of the lever acting on a dispensing piston. A spring biased pivotal connection between the lever and a forwardly mounted supporting link is shiftable between two positions by depression of the lever against the biasing force of the spring.

Abstract: Wherever large forces have to be applied over short distances it is useful to employ a force multiplier device. Very large transmission ratios are, according to the present invention, obtained by interruption of the axis of rotation (2) and insertion of an only slightly displaced force transmission axis (4). The force transmission axis (4) can be continuously displaced to both sides of the axis of rotation (2) by means of positioning facilities, preferable an adjusting screw (5) or two wedges. This way variable force generation is obtained with a widely variable range of transmission ratio.The invention can be employed e.g. for the manufacture and operation of presses, clamping, bending and tension devices.

Abstract: This tiltable steering column is for an automotive vehicle, and includes a main steering shaft made up from a lower steering shaft and an upper steering shaft tiltably rotationally connected to the lower steering shaft, and a column tube assembly which includes a lower tube which rotatably supports the lower steering shaft from the body of the automotive vehicle and an upper tube which rotatably supports the upper steering shaft and is pivotally mounted so as to be able to tilt relative to the lower tube. A tilt locking mechanism also included in the steering shaft includes a first side ratchet mechanism on one side of the column tube assembly and a second side ratchet mechanism on the other side of the column tube assembly.

Abstract: A mechanical proportioning trim execution device in the general configuration of a four-bar linkage including input and output levers coupled by a connecting link, with the input lever having its length determined by a movable pivot automatically adjusted by a gear motor to produce the trim function. The movable pivot advances or retracts along a path which is highly skewed to the line of the input lever in a manner such that the path is perpendicular to the connecting link at zero input displacement for minimum trim effect and is parallel to the connecting link at full input displacement for maximum trim effect.

Abstract: The drill stand has a vertical column and a clamp moveably mounted on the column. A carriage adapted to support a drill is moveably mounted on the column for movement with and with respect to the clamp. A link is pivoted on the clamp and has two pivot locations. A lever arm is pivotally connected to the carriage and has two roller pivots selectively engageable with either of the pivot locations to change the force multiplication and travel distance as the arm is pivoted about the selected pivot location. Each pivot location is at the end of a track having one portion on a curve centered on the link connection to the clamp and another portion on an arc centered on the pivot location associated with the other of the tracks. Each roller engages one of the tracks. The pivot locations are closer together than are the rollers so only one roller can be in a pivot location at one time.

Abstract: Adjusting mechanism is provided for the brakes of a highway trailer. A brake lever is actuated by a pneumatic cylinder and carries a worm gear which is mounted for turning with the lever, and also independently of the lever. The worm gear is splined for non-rotatable reception of a brake shaft. A saddle pinned to the lever carries a tapered worm which meshes with the worm gear. The worm gear is axially split, and the two halves thereof are forced axially away from one another by the worm under load into engagement with surfaces fixed relative to the lever for frictionally fixing said gear relative to said lever. The tapered worm also wedges the periphery of the gear into frictional engagement with a surrounding part of the lever. The worm is turnable to adjust the rotational position of the gear and hence of the brake shaft when not under load, and the worm is lockable in adjusted position.

Abstract: An adjustable throttle connector for a vehicle speed control unit is disclosed. The adjustable throttle connector includes a throttle connector arm which is pivotally connected in an adjustable manner to a housing for the vehicle speed control unit. The adjustable pivotal connection is accomplished by forming a plurality of apertures in the throttle connector arm near the center thereof. A corresponding plurality of apertures are formed in the housing. A pin is inserted through a selected one of the apertures formed in the throttle connector arm and also through the corresponding one of the apertures formed in the housing to provide a fulcrum about which the throttle connector arm is free to pivot.

Abstract: A spin casting machine having a gyro rotor which stabilizes the spindle in the vertical position. The weight of the heavy rotating wheel provides the inertial resistance to speed changes to provide smooth continuous rotation at the selected speed. Lenses spun cast on such a gyroscopically stabilized rotor shaft will be of high optical quality and reproducible.

Abstract: A lever mechanism for a cable linkage includes a control lever mounted on a rotary shaft for rotation therewith, a base plate mounted on the rotary shaft and fixed to the control lever for rotation therewith, and a lever plate adjustably assembled with the base plate and connected at one side of its outer peripheral portion to one end of the cable linkage, the lever plate being provided at its outer peripheral portion with a semicircular guide surface the center of which is located substantially at a rotation fulcrum of the lever plate. The cable linkage is supported on the semicircular guide surface of the lever plate, and the lever plate is displaceable on the base plate during the assembly process thereof to adjust the distance between the semicircular guide surface and the rotation fulcrum.

Abstract: A slack adjuster for use in a transportation environment has a body which has a lever arm formed at one end thereof. There is a crosshole or passage in the body and a worm gear wheel is positioned in the passage for mounting on a brake operating shaft. There is a slot formed in the body and opening into the passage. The slot has three mutually perpendicular surfaces and is of a size and shape to hold a worm gear and to provide for threaded engagement of the worm gear and the worm gear wheel. There is a bore in the body which is generally perpendicular to one of the slot's mutually perpendicular surfaces. A shaft is positioned in the bore and coaxially mounts the worm gear for adjustment thereof. The bore is oversized relative to the shaft, thereby providing no bearing support therefor.

Abstract: A sliding-link mechanism is proposed, which serves in particular to actuate a throttle device in the intake tube of an internal combustion engine. The sliding-link mechanism is disposed by way of example on a throttle valve assembly and includes a variable-fulcrum lever, which is firmly connected to a shaft and has a kidney-shaped oblong slot groove, which is engaged by a roller rotatably supported on a shaft. The shaft is secured on a roller lever, which with a hub is seated on an eccentric sleeve, which can be rotatable about a shaft secured to the throttle valve assembly. The eccentric sleeve and the hub have meshing teeth which by axial displacement relative to one another become disengaged, so that by rotating the eccentric sleeve the position of the roller lever relative to the variable-fulcrum lever can be varied in such a way that in the outset position the roller comes to rest on the end of the oblong slot groove.

Abstract: A brake operating device mounted to a bicycle handle, in which a bracket having a first abutting member pivotally supports an operating lever having a second abutting surface for abutting the first abutting surface. Each abutting surface is formed in a circular arc centered at a position spaced from the pivot point of the lever relative to the bracket. The pivot point is shifted on the circumference of a circle which is concentric with the circular arcs forming the first and second abutting surfaces to adjust the grip dimension between the handle and the operating lever.

Abstract: A manipulator is provided for a surgical microscope in order to deflect a laser beam on the viewed operating area, the movement of a handle being transmitted via a lever mechanism to the movement of a mirror which reflects the laser beam to a point and via a path within the viewed operating area. The sensitivity of transmitted motion can be adapted to the selected magnification of the surgical microscope by changing the length of a transmission lever in order to change its point of motion pick-off from the handle.

Abstract: Paired, side-by-side sets of upper and lower sprocket wheels are commonly chain driven at similar speeds. Crank arms are pivotably mounted at their upper ends to the upper wheels of each set and project slidably through cylindrical bushings fixed to journals rotatably mounted to the lower wheel for rotation about the journal axes, radially displaced from the axis of rotation of the lower wheels. Tines are mounted to the lower ends of the crank arms for penetration into and extraction from the turf to aerate the turf. Machine propulsion is effected automatically as a result of driving the tines into the turf and retraction of the same. Holes at different radial positions within the upper and lower wheels permit the crank arms to be mounted to the upper wheels at different radial positions to control the depth of tine penetration into the turf.

Abstract: Paired, side by side sets of upper and lower wheels are connected together and driven by jack shafts pivotally mounted at respective ends to the upper and lower wheels of each set. One common shaft rotatably mounts the upper wheels, and a second shaft mounts the lower wheels for rotation about common axes to effect driving of the upper wheels and lower wheels in unison. The jack shafts joining the upper and lower wheels, respectively, of each set, are angularly offset to achieve desired timing and rotation of the wheels in unison and the sequence in projection and retraction of tines mounted through the jack shafts to the lower wheels of each set. The arrangement insures tine entry and retraction from the ground perpendicular to the ground. It also permits doubling the RPM of the wheels to increase the force driving the tines into the turf. Machine propulsion is effected automatically as a result of driving the tines in the ground and retraction of same.

Abstract: A circuit breaker characterized by a housing and a circuit breaker structure within the housing and comprising an electromagnetic trip including a magnetic yoke and armature and means associated with the armature for adjusting the electromagnetic force required to pull the armature to the yoke, whereby changing of the force requirement results in significant reduction in operating time of the trip unit.

Abstract: A railroad car with a hopper-type body may include a series of gate assemblies for selective discharge of commodity in the car body. Each gate assembly may have two pairs of doors which rotate to close or open respective outlet openings in the gate assembly. Door rotation is effected by an operating system comprising an air cylinder joined to a series of lever activating devices by a series of connecting rods. Each lever device includes a lever arm pinned to the connecting rods and rotatively carried on a shaft attached to a sill of the car. A crank arm of the device is also carried on the shaft and interacts with the lever arm through a pair of bolts threaded one each to the lever arm and crank arm. Ends of the device crank arms are pivotally secured by connecting bars to adjacent gate door pairs respectively.

Abstract: An apparatus for replaceably connecting a casting tube to a closable pouring spout of a tundish includes a gimbal device for supporting the casting tube and a double-arm lever including a first arm supporting the gimbal device and a second arm carrying a counterweight. The lever is supported about an axis such that the counterweight pivots the lever about the axis and causes the first arm and the gimbal device to press the casting tube against the mouth of the pouring spout. Supports are fixed to the tundish, a pin member defines the axis, and a mounting structure moves the pin member between an operative position pivotally supporting the lever on the supports and an inoperative position where the lever is released from the supports.

Abstract: A gyroscope load cell which includes a gyroscope suspended in a housing and provided with the usual inner and outer gimbals. The specific improvement of the present invention is concerned with the joint between the inner and outer gimbals which, in the present case, consists of a V-strap hinge composed of a pair of straps intersecting along a line which intersects the precessional axis of the gyroscope at an angle of 90.degree..

Abstract: A remotely controllable linear power actuator for the control of manually operable hydraulic valve handle or the like. A down-geared motor drives an adjustable friction slip clutch connected to a plate that can be rotated around the axis of the clutch by operation of the motor. A freely movable second plate is pivotally connected to the first elongated plate and the linearly movable output shaft is connected to the opposite end of the second plate. Thus, until the two plates are interconnected against pivotal rotation the output shaft which is connected to the valve handle may be easily moved manually. A solenoid interlock on one plate may be actuated to force the solenoid armature, or a steel ball driven by the armature, into a corresponding hole in the other plate to thereby connect the two plates at some point distant from the pivot pin.

Abstract: A multiple schedule valve including a valve seat and a valve member movable with respect thereto. A lever in the form of a bell crank is connected to the valve member and is movable on a pivot. A first actuator is connected to the lever to pivot the same to thereby move the valve member relative to the seat. A second actuator is connected to the pivot and is operable to shift the pivot axis thereof.

Abstract: The present invention pertains to a continuously variable gear device for converting a rotary motion into a linear motion which is dependent on the angle of rotation. The gear device comprises a swivel arm which is rotatable about a fulcrum and is attached to a guide structure on the input and output sides, respectively, of the gear device. Each guide structure is provided with a sliding member to which strings are attached. The swivel arm has guide slots formed on either side of the fulcrum and each guide structure has a roller bearing which engages one of the slots. The mutual distance between the two guide structures is adjustable, by moving one of the guide structures along a positioning rail to vary the transmission ratio of the device.

Abstract: A dynamically variable oscillating adjustment assembly including a frame and a first link means pivotally connected at one end to the frame and an adjustment mechanism positioned intermediate the one end of the first link means and the frame to adjustably position the first link means with respect to the frame. A second link means pivotally connected at one end to the other end of the first link means and pivotally connected at the other end to a first arm of a bell crank pivotally mounted upon the frame. A second arm of the bell crank is operable to oscillate in response to oscillation of the other end of the first link means. An adjustment mechanism may be interposed between the frame and the intermediate pivot of the bell crank such that the position and stroke of the other arm of the bell crank may be selectively adjusted.

Abstract: A pneumatic wall-vent closer for use in a thermal-pneumatic automatic temperature control system. The system is used to maintain constant temperature in livestock confinement buildings. The wall-vent closer attaches between the sill of a wall-vent in a confinement building and the wall-vent. As the temperature in the confinement building varies, the pneumatic wall-vent closer automatically opens and closes the wall vents to allow more or less air into the confinement building to maintain a pre-set stable temperature.

Abstract: An automatic workpiece delivery apparatus includes a support member mounted on a body for vertical movement. A slide bar is supported by the support member for horizontal movement and has a pair of workpiece holders at its opposite ends. First and second cams are mounted on a common cam shaft. First and second cam mechanisms are operable respectively in response to the cam surfaces of the first and second cams. A first displacement transmitting mechanism operatively connects the first cam mechanism to the slide bar for displacing the slide bar horizontally. A second displacement transmitting mechanism operatively connects the second cam mechanism to the support member for displacing the support member vertically. A motor has an output shaft connected to the cam shaft for rotating the first and second cams.

Abstract: The pump jack is of conventional API front-mounted geometry Class III configuration, but is provided with an angularly disposed walking beam, so as to be able to pump a slant rod string. To incorporate versatility into the unit so that a single model can be used with different wells having different angularities, there is provided: means for altering the effective length of the Pitman arms (so that the angularity of the walking beam is changed, which permits the unit to be used with a rod string having a different slant); means for bringing the counterweight into phase with the well load; and means for altering the stroke length.