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.

Abstract: In a railway hopper car with several bottom dump doors, the doors are operated by a main door operating member in the form of a thrust bar running the length of the car. The bar, when moved, rotates levers which rotate actuator shafts which move door operating linkage arrangements, opening and closing the dump doors. An adjustable positioning structure is provided on each lever to cause adjustment of the individual dump door positions. The adjustment is accomplished by tightening or loosening bolts in the adjustor, which is fixed on an actuator shaft running to the linkage arrangement. The adjustor and actuator shaft rotate on a bearing with respect to the lever, but are held in locked adjusted position by the adjustor bolts abutting on flanges welded to the lever.

Abstract: A remote manipulator for a robotic system has a plurality of intercoupled manipulator links and a principal manipulator drive unit coupled to manipulate the remote position of an end-effector supported by said links in response to a manipulator control signal. Coarse adjustment of the end effector is refined by a precision control subsystem which augments the principal manipulator to achieve a "control-in-the-small" robotic manipulator system. The augmenting precision-achieving subsystem includes a coupling mechanism, coupled with one of the links, for establishing the position of one of the links relative to another link, and a precision adjustment device, associated with the coupling mechanisms for adjusting the position of the one link relative to another link as established by the coupling mechanism, independently of the action of the principal manipulator drive unit and effectively without bearing the load supported by the one of said links.

Abstract: A variable mechanical advantage/variable effective length torque arm assembly (100) for a synchronized transmission is provided. The torque arm assembly comprises a substantially rigid body (102) fixedly mounted to a shift shaft (36) at one end (104) thereof for axial and rotational movement therewith. The body is provided with an axially extending elongated slot (106) in which a pivot pin (124) is received for pivotably attaching an axially movable control rod (22) to the body of the torque arm assembly. A biasing spring (134) bias the pivot pin to a first end of the slot closer to the axis of the shift shaft to define a first effective length (138) of the torque arm assembly which biasing force may be overcome by a sufficient resistance to rotation of the shift shaft (36) allowing the pivot pin to move away from the axis of the shift shaft to define a second effective length (140) of the torque arm assembly greater than the first effective length.

Abstract: A control linkage has levers for actuating the throttle lever of a carburetor and a primer pump. A slide actuator has cam grooves engaging ends of the levers to actuate the levers in response to movement of the slide actuator. An adjustable linkage is provided on the end of the lever to allow adjustment of the linkage without the use of tools. The adjustable link has an adjustment arm formed integrally with the lever and ratchet teeth on the arm and lever engage to allow adjustment.

Abstract: An energy storage device comprising three flywheels mounted mutually perpendicular on said shafts in three dimensions within a rigid enclosure. The shafts are interconnected within the enclosure through a bevel gear arrangement in which the motion of one flywheel is imparted to the other flywheels. The shafts pass through the walls of the enclosure through a bearing arrangement.

Abstract: A valve control linkage is disclosed which provides a variable rate of relative motion between a valve spool and a control lever. The relative rate of valve spool displacement with respect to the lever motion is lowest adjacent the neutral position of the lever.

Abstract: A carburetor situated on an intake manifold of an engine is shown having an induction passage with a choke valve therein mounted on a choke shaft which in turn has a choke control lever; a thermostatic control situated on a different portion of the intake manifold is operatively connected to the choke control lever as through a rod linkage; a selectively adjustable retainer carried by the choke lever operatively engages the rod linkage; the retainer is adjustable to accommodate variations in the effective distance as between the choke lever and the thermostatic control to be spanned by the rod linkage.

Abstract: To adjust the relative positions of two elements mounted for guided sliding relative motion in a first direction and in a contact plane thereof, a cylindrical adjusting tool is fitted into a reference bore in one element and rotationally and non-slippably engaging an edge of the other element. A manually operable button on the tool may be depressed to remove a cam permitting adjustment rotation of the tool, or released to secure the tool in the bore while clamping means are operated integral with the two elements, and the tool can then be removed. Substantially one-handed adjustment is thus possible leaving an operator's other hand free to operate other apparatus.

Abstract: A dual ratio accelerator arm assembly is disclosed. The assembly provides a slow first throttle opening rate through a first arc of movement of the arm assembly and then a discrete change to a higher throttle opening rate through a second arc of movement of the arm that noticeably signals a higher fuel consumption. The assembly comprises an accelerator arm, a bracket supporting the arm for operable movement, a pair of pivot pins carried by the arm, and means in the bracket for defining at least one pair of first and second pivot pin receptacles. Each receptacle is associated with one of the pins, has a fulcrum segment, and is effective to allow limited movement of the pin therein. The first segment, with its fulcrum segment engaged by its associated pin, defines a force applying lever arm which is shorter than the force applying lever arm defined by the second receptacle with its associated pin in engagement with its fulcrum segment.

Abstract: A controller for a damper maintains a substantially constant volumetric rate of flow of air through a duct into a controlled space for a given condition in the space and resets the rate of flow as a function of at least one sensed condition which causes changes in a control pressure. A dual lever system enables the controller to be calibrated to establish various air flow spans while utilizing substantially the full available range of control pressure to effect a change in air flow within each selected span.

Abstract: Destabilization of a gyro-stabilized platform (such as employed for mounting an antenna on-board a ship) resulting from uncompensated yaw or rotation of the platform in azimuth from a fixed reference orientation is prevented by employing a pair of counter-rotating gyros for each stabilized axis and caging gyros having a spin direction opposite to the direction of rotation of the platform.

Abstract: A linkage for use in moment balancing measuring apparatus of the pneumatic type includes first and second pivotally mounted levers, the second lever being adapted to be acted upon by a measuring force and the first lever being adapted to be acted upon by a pneumatic force for balancing the linkage. According to the invention, apparatus are provided for adjustably varying the leverage ratio of the linkage, i.e., the ratio of the pneumatic force to the measuring force according to the particular application to which the linkage is put. The leverage ratio adjusting apparatus includes a rod-like member having one end rotatably attached to one of the levers and first locking means for selectively securing the rod-like member in a particular position corresponding to the particular application to which the linkage is put.

Abstract: A band brake assembly comprises a friction element (12) engageable with a rotatable member (10) and an input linkage assembly (30) controlling engagement of the friction element with the rotatable member. The input linkage assembly (30) is carried by a mounting bracket (32) and includes a first lever (34), a bearing assembly (38) and a second lever (40) engageable with an end plate (42) secured to the ends of the friction element (12). The end plate (42) carries pins (22, 24) secured to the friction element and extending into slots (52, 54) on the mounting bracket (32). The pins transfer braking torque to the mounting bracket (32) and are guided by the slots to provide a servo assist during braking.

Abstract: An agile payload orientation system for a space satellite comprises a three-axis gimbal (30) for coupling an appended body (20) containing the payload (24, 25, 26, 27) to a main body (10) of the satellite. The appended body (20) also contains moment control gyroscopes (29), which are responsive to external command for changing the orientation of the appended body (20) relative to an inertial reference. The gimbal (30) comprises three separate torquer-resolver units (31, 32, 33), which are connected to each other in series so that their axes are mutually orthogonal to each other and coincide at a single point (34) located at the center of mass of the appended body (20). Since the center of mass of the appended body (20) does not move when the appended body (20) is rotated about the axis of any of the torquer-resolver units (31, 32, 33), a change in orientation of the appended body (20) can be made without disturbing the orientation of the main body (10).

Abstract: A variable ratio metering, mixing and dispensing apparatus comprises a plunger pump for a main component which is driven by a piston-cylinder assembly, a plunger pump for a hardener which is driven by a piston-cylinder assembly, and a mixer for mixing together the main component from the main component pump and the hardener from the hardener pump. The plunger of the main component pump and the plunger of the hardener pump are connected by adjustable metering means.

Abstract: Roller-tip rocker-arm for high-performance internal combustion engines, pivotable about a trunnion therethrough, having a roller in the tip thereof for contacting the stem of a valve depressed (i.e., in the engine, per se, "lifted" from its seat in the "closed" position) thereby and having on the other end (i.e., tail) thereof an arcuate surface for contacting and abutting the cooperatively shaped end of a pushrod, the latter of which lifts said tail, wherein the roller and arcuate surface are so positioned so that, at the point in the motion of the rocker-arm wherein the valve stem is at a location corresponding to the mid-lift of the valve to which it is attached, the angles (a) that the axis of the valve stem defines with the axis intersecting the axes of the roller and trunnion and (b) that the axis of the pushrod defines with the axis intersecting the center of the arcuate surface and the axis of the trunnion are both essentially 90 degrees.

Abstract: A torque converter is disclosed which comprises a gimbal assembly having a gyroscope mounted for rotation within one of the rings thereof. The spin axle of the gyroscope and the entire gimbal assembly are adapted to rotate about the precessional axis of the gyroscope. The gimbal ring is further adapted to oscillate about a torque axis that is perpendicular to the precessional axis to set up gyroscopic forces in the converter. The spin axis of the gyroscope is independently connected to the output gear of a differential drive unit and the input gear of the unit is connected to the drive shaft of the engine. A planetary gear section is interposed between the input and output gears of the drive unit that is adapted to turn the loaded output shaft of the converter. Oscillating means rock the gimbal ring about the torque axis at some fixed multiple of the engine speed while the entire gimbal assembly is turned about the precessional axis at some fixed multiple of the load speed.

Abstract: A brake operating device for a bicycle, which comprises a bracket member fixed to a handle bar and a control lever pivoted to the bracket member through a lever shaft. The lever is pivoted to the bracket member at a pivot portion disposed on a straight line passing through the center of a distance between the brake applying position and the brake rest position of the grip portion of the lever.

Abstract: A mounting bracket for mounting a control actuator has a mounting surface, a mounting portion and a bore in the mounting portion. The control actuator is mounted on the mounting surface and the mounting portion is connected to a wall at an aperture in the wall. An input shaft is pivotally positioned within the bore and extends through the aperture. A device connects the input shaft to the control aperture.

Abstract: A powered gimbal high torque/acceleration stabilized platform including an uter gimbal ring and gimbal torquer and an inner gimbal gear and torque motor. The inner gimbal torque motor is secured to the outer gimbal ring to permit increased weight and volume sensors to be packaged and located at the center of rotation of the gimbal axis.

Abstract: A gyroscope caging system includes a clamping ring encircling a portion of the rotor of the gyro and adapted to engage an annular groove in the rotor simultaneously with engagement of a groove in a base support member, for clamping to and supporting the rotor during very high acceleration launches of a missile or airborne vehicle. The caging system is adapted to preload the gyroscope bearings in order to insure that the maximum load is carried by the cage device.

Abstract: A brake operating device for a bicycle has a bracket which carries a control lever pivoted thereto and is adjustable mounted to a fixed member fixed to a handle bar of the bicycle. Structures are provided to enable the bracket position to be changed with respect to the fixed member to adjust the distance between the grip of the control lever and the handle bar without changing the relative position of an outer sheath of a control cable supported at the bracket with respect to a control wire of a control cable supported at the control lever.

Abstract: A system for restraining forward movement of an occupant of a motor vehicle seat comprises a chest pad 18 on an arm 16 which is pivotable about a transverse axis 20 behind and below the seat, together with a lap restraint in the form of an arm 10 having a padded portion 12 which extends across the user's lap. The arm 10 is pivotally mounted on a transverse axis 24 located near the front of the seat. A lever 26 is fast with the arm 16 and a lever 28 is fast with the arm 10. A roller 32 engages confronting surfaces 34 and 36 on the arms 26 and 28. When the roller 32 is in the position shown, forward movement of the arm 16 causes relatively little backward movement of the arm 10 so that the occupant can lean forward in his seat without forcing the bar on the arm 10 into his lap. If, due to sudden decceleration of the vehicle, the occupant moves forward in his seat, lifting the padded portion 12, the roller 32 shoots forwards into engagement with stop surface 38.

Abstract: A constant torque power transmission consisting of a rotating mass, or gyroscope, rotating around a first axis and supported by a frame or enclosure in turn pivotally supported about a second axis at right angle to the first axis by a gimbal, the gimbal being pivotably supported around a third axis disposed at right angle to the second axis. The reciprocating member of a crankless reciprocating engine, of the free piston or free-cylinder type, oscillates the gimbal and the rotating mass about the third axis, causing the rotating mass frame or enclosure to develop a precessional force oscillating about the second axis. The oscillating precessional force is applied to an output shaft through a one-way clutch assembly.

Abstract: A mechanical proportioning trim execution device has a fulcrumed lever which swings between fully retracted and fully advanced positions. The fulcrum is movable back and forth from a neutral point along a fulcrum path. The lever has a fulcrum-engaging slideway extending in skewed relation to the length of the lever such that when the lever is in fully retracted position the fulcrum path and slideway are parallel but become increasingly skewed as the lever moves toward the fully advanced position.

Abstract: A universal adaptor linkage for connection between the transmission and the shift or linkage rod associated with the gear selector lever of an automobile comprising a lower linkage portion having at least one hole therein for selective connection to the shift or linkage rod, a center linkage portion having a hole therein for connection to the gear shift control valve trunnion of the transmission, a transverse linkage portion for connecting the upper end of the lower linkage portion to the lower end of the center linkage portion, an upper linkage portion extending upwardly from the center linkage portion and having at least one hole therein for selective connection to the shift or linkage rod, and an upper transverse linkage portion extending between the upper end of the center linkage portion and the lower end of the upper linkage portion.

Abstract: PCT No. PCT/US79/00080 Sec. 371 Date Feb. 9, 1979 Sec. 102(e) Date Feb. 9, 1979 PCT Filed Feb. 9, 1979 PCT Pub. No. WO80/01682 PCT Pub. Date Aug. 21, 1980An adjustable double link mounting for interconnecting a pair of structures, such as structures (37, 51) mountable on a crawler vehicle (10), including at least a pair of spaced-apart lugs (44, 82, 83, 84, 85) on each of the structures and each having a bore, a pair of spaced-apart links (80,81) having a pivotal connection at each end to at least one lug as provided by a pin-receiving opening (91, 92, 105, 107) for receiving a pin (93, 94, 104, 106) which also extends through an apertured lug, and one (81) of the links including a turnbuckle (110, 111, 112) for adjusting the effective length thereof.

Abstract: A brake cable operating lever is disclosed including a device for adjusting the cable tension which is produced when the operating lever is in the brake-on position, characterized in that the rotary tension adjusting screw (36) which extends axially of the operating lever includes intermediate its ends an annular collar portion (36a) that is rotatably supported by an abutment shoulder (20f) on the operating lever (20), whereby the apparatus remains operable even if the manual operating knob (38) were to be removed from the screw member. An internal friction producing device (40) is provided for restricting rotation of the screw member about its axis.

Abstract: This specification discloses an off-road vehicle employing an improved hydrostatic drive system including engine driven variable displacement pumps having respective actuating members for varying displacement in two directions equivalent to forward and reverse directions, wheel motors at each wheel representing hydraulic actuating device operable by the fluid from the pump, hydraulic reservoir, serially interconnecting supply and return lines, and an improvement comprising one or more operator control members and a sensitivity control means for controlling the range of movement of the actuating member responsive to movement of the operating control member in a respective direction. Also disclosed is a preferred embodiment in which four wheel hydrostatic drive is employed with an option of converting the hydraulic fluid output that normally goes to one set of wheels such that all of the fluid goes to the other set of wheels for road speed operation.

Abstract: A device for displacing the walking beam of deep-well pump drives. The walking beam support of the pivot bearing has on its long sides guides for the walking beam, while its narrow sides have slide arrangements for slightly raising and supporting the walking beam during lengthwise displacement. A two-way shifting device is hinged to the pivot bearing. The other end of the shifting device is connected to that part of the walking beam which engages the crank. On both long sides of the walking beam support, a guide rail may protrude beyond the contact plane of the walking beam support and enclose the lower part of the walking beam. The narrow sides of the walking beam support may mount rollers whose axes run parallel to the narrow sides of the walking beam support. The bottom side of the walking beam has arc-shaped recesses for receiving the roller parts protruding beyond the contact area of the walking beam support. The center axes of these recesses are parallel to the rotary axes of the rollers.

Abstract: A tilting arrangement for a vehicle with the aid of which a body of the vehicle is adjustable in a roll direction relative to an underframe of the vehicle to compensate for centrifugal force exerted in curves on subjects resting on the body is controlled by a control signal which is produced with the aid of a device comprising a speedometer and a gyro arrangement for producing signals which are representative of the travelling velocity and the yaw angular velocity of the vehicle as well as the roll angular velocity and the roll angle of either one of said parts of the vehicle. The signals are combined to produce a control signal the magnitude of which is representative of the expression .vertline.m.V..theta..sub.gir .vertline.-.vertline.k.g..theta..sub.roll .vertline., and has a sign, plus or minus, determined by the sign of the signal representative of .theta..sub.roll, in which expression V is the travelling velocity of the vehicle, .theta..sub.gir is the yaw angular velocity of the vehicle, .theta..sub.

Abstract: A guided vehicle including at each end portion of the body a pair of steerable running wheels adapted to run on track surfaces and a pair of guide wheels adapted to run along guide rails provided at the opposite sides of the track surfaces. A steering linkage is provided for connecting the running and guide wheels so that the former is steered in response to a transverse movement of the latter. A friction type restraining device is provided in the linkage so that the steering movement is not produced by a small amount of surface roughness in the guide rail.

Abstract: The system is used in power-assisted control systems to provide a restoring force to the control stick indicative to the pilot of the deflection of a control surface. The feel system is trimmable in that the neutral position can be altered. In prior systems trimming was accomplished by releasing a brake which permitted movement of a part of the control stick linkage toward an equilibrium position in response to the restoring force. In prior systems the released part acquired sufficient momentum to cause it to overshoot and oscillate about the equilibrium position. If the brake were engaged prematurely, the momentum was imparted to the control stick resulting in a disagreeable "kick" felt by the pilot. To overcome these problems, the brake is repetitively disengaged and engaged at a repetition rate in the range 5-40 Hz. The small amount of momentum built up in each of the successive cycles results in an almost imperceptible vibratory reaction on the control stick rather than a single large "kick".

Abstract: A gimbal system utilizing two torque motor drives wherein the motors are on the drive axes and whose rotors and cases provide the gimbal structure for increased off boresite capability (look angle), faster response time due to reduced inertia, low swept volume and low cost based on the simplicity of the structure.

Abstract: A mass rate flow meter is provided having a universally-mounted gyroscopic apparatus against which a fluid stream, the mass rate of flow of which is to be measured, is directed. The fluid drives the rotor of the gyroscopic apparatus at and angular velocity proportional to the fluid stream velocity and impinges upon a pressure pad mounted on the gyroscopic apparatus, such that the effective impingement force is applied asymmetrically to the rotor, thereby applying a torque to the gyroscopic apparatus proportional to the dynamic pressure of the fluid stream and causing precessional rotation of the gyroscopic apparatus. The resulting precessional rotation of the gyroscopic apparatus is at a rate proportional to the mass rate of flow of the fluid. Measurement of the precessional rotation of the gyroscopic apparatus provides an indication of the mass rate of flow, and totalization of the precessional rotations provides total mass flow indications.

Abstract: Apparatus is disclosed for stopping a rotatable circular disc of the type which has a plurality of notches in the circumference thereof, such as may be used in game machines which have rotatable symbol carrying reels. The apparatus includes an improved index arm assembly which has the capability of cushioning the shock that occurs when its associated stop member engages a notch of the disc for stopping the same.

Abstract: Disclosed herein is an engine throttle control for marine propulsion devices and the like, which control includes a main control lever mounted for movement between a neutral or idle position and a full throttle position, a throttle lever adapted to actuate the engine throttle in response to rotational movement of the throttle lever, an actuation member operably connected to the control lever and mounted for movement in response to movement of the control lever, and means connecting the throttle lever to the actuation member for rotating the throttle lever in response to the movement of the actuation member and for effecting gradually increasing rotational movement of the throttle lever relative to incremental movement of the actuation member during at least a portion of control lever movement from the idle position toward the full throttle position.

Abstract: In a material handling machine having a turret, a boom supported by the turret for movement about a first pivot, and a piston-cylinder unit for pivoting the boom about the first pivot, the piston-cylinder unit being supported by the turret for pivotal movement about a second pivot parallel to the first pivot, the improvement comprising at least one of the aforesaid pivots being journalled for rotation in the bore of an eccentric sleeve member which is in turn journalled for adjustable rotation in the turret. Rotation of the eccentric sleeve produces a change in the distance between the first and second pivots, with an accompanying variation in the speed-power relationship of boom movement.

Abstract: A caging system for non-closed-loop gyro systems used in gyro stabilized platforms using fluid dashpots in place of automatic caging gyro brakes, torquers, or solenoids. A fluid dashpot is mounted on the gyro stabilized platform for each gyro of the platform with the linear motion of the dashpot along an axis normal to the median general rotational plane of the respective gyro of the platform. Movement of a dashpot linear movement member is greatly accentuated by the dashpot to gyro assembly interconnected linkage as roll component or pitch component amplitude exceeds designed operational gimbal roll and pitch ranges of respectively roll and pitch gyros of the platform.

Abstract: A fire detection system for rotary regenerative heat exchange apparatus having multiple detectors, each detector being mounted independently on an arcuately reciprocable scanning arm. The several arms are laterally adjustable by a system of opposed screws in an articulated yoke to permit the selective positioning of each arm independent from the other scanning arms of the system.

Abstract: A method of welding a thermoshrinkable sheet comprises inserting between opposing faces of the sheet to be welded a piece of uncrosslinked resin tape containing peroxide, securing heat-resisting tapes on and adjacent outer faces of a welding portion of the sheet, and heating and pressing the welding portion.A device for use in the method includes a pressing plate having a heater, a receiving plate, a first link pivotally connected at one end to one end of the receiving plate and at the other end to the pressing plate, an operation lever pivoted on one end of the receiving plate, a second link pivotally connected to the free end of the operation lever and to the first link. The first and second links and the operation lever constitute a power amplifier mechanism in which the turning force of the operation lever is amplified to the pressure of the pressing plate through the second and first links.

Abstract: A new and improved lever arm apparatus for door closers and the like is adapted to be detachably mounted on a rotary shaft and includes a lever arm formed of a thin piece of flat metal having a key-shaped opening dimensioned to receive a portion of the shaft extended transversely between opposite faces of the arm. A wedge plate or hub is adapted to be detachably mounted on one face of the lever arm and is also formed with a key-shaped opening for receiving a shaft. At least one removable fastener is provided for securing the wedge plate to the lever arm at a point outwardly of the openings and the hub or wedge plate includes a sloping cam surface engaged by the fastener for rotatably shifting the relative positions of the lever arm and wedge plate to tightly clamp the flatted surface of the key-shaped openings against the rotary shaft with a scissors-type pinching action.

Abstract: An automatic and manual linear reversion control mechanism for a hydraulic servo actuator assembly is disclosed for linearly transferring control between an automatic (fly by wire) control mechanism and a manual control mechanism. A command select mechanism includes two axially aligned pins mounted on a rigid command selector bar, with the first pins slidably mounted in a slot in a control bar of the manual control mechanism and the second pin slidably mounted in a slot in the control bar of the automatic control mechanism so that movement of the command selector bar to displace the two axially aligned pins in their associated slots provides a linear transfer of control of the hydraulic assembly between the manual control and the automatic control.

Abstract: A cylindrical linear actuator suitable for installation in a confined area and capable of infinite stroke adjustment over its scheduled travel and lockable at any position of its designated stroke includes overlapping and combining rod end stroke adjustments to minimize actuator length. Electrical feedback is precalibrated to give a known signal proportional to the actuator stroke and to the position of the load clevis thereby always giving the correct position of the load.

Abstract: A ratio select mechanism including a supporting structure, first and second rotary input members mounted on the supporting structure, and a connecting lever extending between the rotary input members. An output member is coupled to the connecting lever. The opposite ends of the connecting lever are mounted for movement on the rotary input members, respectively, along radially extending paths. By adjusting the relative radial positions of the end portions of the connecting lever, the authority which each of the rotary input members has over the output member can be adjusted.

Abstract: In a camera, a shutter release member is pivotally connected to a motion transmitting lever between respective end portions of the lever. One end portion of the lever normally contacts a removable fulcrum, and the other end portion contacts a restraining member provided for a shutter drive member. To initiate shutter actuation for picture-taking, the shutter release member is manually depressed to swing the lever about the removable fulcrum. The swinging lever moves the restraining member from a restraining position to a releasing position, freeing the drive member to actuate the camera shutter. To prevent unintended shutter actuation by inadvertently depressing the shutter release member, the fulcrum is removed from the lever. Then, manual depression of the shutter release member swings the lever about the restraining member, which is spring held in its restraining position to serve as an alternate fulcrum for the lever.

Abstract: A device for applying a constant force to a glass scoring wheel includes a pivotally mounted L-shaped lever arm having the scoring wheel rotatably mounted at one end of the horizontal member and an adjustable vertical member. A constant force coil spring biases the vertical member to pivot the horizontal member in a direction to urge the scoring wheel at a constant predetermined force against the glass sheet. The constant predetermined force acting on the scoring wheel is a function of the height of the vertical arm.

Abstract: A control linkage arrangement for use in a vehicle drive. The drive includes a speed control apparatus having a movable control element for causing the speed of the drive to vary in accordance with the positioning of the control element. Manual control of the operation of the vehicle is effected by an adjustment of a manually operable speed lever which is connected to the movable control element by an improved linkage arrangement. The linkage arrangement includes a ball connector received in a guide channel for effecting rotation of a pivot member connected to the speed control means. Selective positioning of the ball connector in the guide channel effects selective movement of the pivot member in either of opposite directions of rotation and to an extent controlled by the movement of the manually operable speed lever.

Abstract: A tightening wrench with an angle indicator for the final tightening operation on threaded fasteners, the angle indicator having a pointer or other angle indicating element which assumes a given angular orientation under the influence of an ambient force field of gravity or magnetism and maintains this orientation while the wrench is rotated, thereby giving an angular reading of the tightening angle. Gravity is used with a weighted pointer, magnetism with a needle compass or liquid compass. Also usable is a gyro, or a freely rotatable mass of high inertia. The wrench may be a torque wrench.