Abstract: The present invention relates to a programmer control device.This device comprises a rotary cam block 5 intended to be driven step by step by an advancing device comprising three advancing pawls 21, 22, 23 mounted on an oscillating support. The first pawl 21 can directly actuate step by step the first toothed ring 31 integral with the first part 1 of the cam block 5. The second pawl 22 interacts under the action of an elastic means with the smooth periphery 25 of a cylindrical extension 26 forming part of the second part 2 of the cam block 5. It likewise interacts, via orifices 30 passing completely through this extension 26, with a second toothed ring 32 integral with the first part 1. The third pawl 23 interacts under the action of an elastic means with a third toothed ring 33 integral with the inner periphery of a rate reduction collar 3 mounted rotatably inside the second part 2 of the cam block 5.

Abstract: A powered ratchet wrench for turning threaded members, such as nuts or bolt heads, consists of a wrench assembly having a reaction arm adapted to be positioned over a threaded member, viz. nut or bolt, for supporting the same and operating a socket wrench through a ratchet mechanism applying a torque for tightening or loosening the nuts or bolts. The wrench assembly has a box shaped housing with an open end portion supporting a ratchet mechanism and a double-acting fluid operated cylinder having an operating piston extending therefrom for operating the ratchet mechanism. The ratchet mechanism consists of a ratchet wheel supported between two plates on bearing sleeves extending from side to side at the open end portion of the housing. A pair of pawls with driving teeth engage opposite sides of the ratchet wheel and are spring biased toward engagement with the ratchet teeth. The pawls are pivotally supported on each other and on the ratchet wheel supporting plates.

Abstract: A lever hoist comprises a change gear provided in a driving shaft for driving a sheave for winding-up a chain or rope for a load, an operating lever rockably driven by a hand, winding-up and winding-off driving pawls engageable with teeth of the change gear and changeable in response to the purpose of hoisting or lowering the load, and a braking assembly for preventing the change gear from being driven by a gravity of the load and having a spring for releasing the braking assembly. According to the invention the lever hoist further comprises a brake spring control member rotatably fitted on the driving shaft, a brake clamping spring arranged between the driving member and the brake spring control member, and a direction change transmission mechanism for transforming rotation of the brake spring control member into axial urging force of the brake clamping spring.

Abstract: A lever hoist comprises a change gear for driving a sheave for winding-up a chain or rope for a load, an operating lever rockably driven by a hand, winding-up and winding-off driving pawls engageable with teeth of the change gear and changeable in response to the purpose of hoisting or lowering the load, and a braking assembly for preventing the change gear from being driven by a gravity of the load and having a spring for releasing the braking assembly.

Abstract: A ratchet drive comprises a support in which the trunnions of a ratchet gear are mounted. A pair of transversely spaced drive plates are also mounted on the support for tilting movement about the axis of the ratchet gear between an active stroke and a return stroke so that front ends of a pair of drive pawls connected to the drive plates engage, during each active stroke of the latter, adjacent teeth of the ratchet gear to turn the latter through a predetermined angle during each active stroke.

Abstract: A foot-powered wheeled vehicle provides a frame having a platform normally occupied by a user. A pair of spaced apart front and rear trucks each supports a pinion geared shaft and a pair of wheels affixed to opposite ends of the shaft and rotatably with respect to the platform. A pair of independently actuable front and rear foot pedals hingedly are connected to the frame, each of the pedals being movable as desired by the operator between upper relaxed and lower depressed positions with each of the pedals being capable of imparting rotational energy to the wheels associated with its truck. Return springs are associated with each of the pedals for independently biasing each of the pedals toward the upper position which is overcome only by depression by the foot of the operator. Each pedal provides a curved toothed gear rack which is connected at its uppermost end portion to the pedal and which drivingly engages the pinion gear portion of the shaft responsive to depression of the pedal.

Abstract: The invention is directed to a music box spring drive mechanism comprising a wheel that has a bevel gear on an outer peripheral edge with an inner recess that has ratchet teeth on its peripheral wall of the recess, a spring winding axle cooperates with the wheel to provide a drive for a music making cylinder. A pawl member is centrally located in the recess of the wheel and cooperates with the ratchet teeth to drive the wheel. The pawl comprises a body portion having a thickness corresponding to the depth of the recess, a resilient arcuated portion integrally formed with the body portion with teeth formed on the end of the arcuated portion. The teeth are provided with a first contact portion and a second contact portion which are in contact with a ratchet tooth formed along the inner wall of the recess.

Abstract: A hinge for a chaise and the like has a first hinge element having a segment portion with a plurality of first arresting formations, a second hinge element provided with an arresting member pivotally mounted on the same and having control faces and a plurality of second arresting formations arranged to abut against the first arresting formations, and control projections engageable with the control faces of the arresting member so as to guide the latter in connection with the first hinge element having the segment portion.

Abstract: A locking and unlocking device for a manually movable wheeled storage rack or the like is disclosed wherein a toothed locking wheel is operatively connected to wheels of a storage rack, and a pair of locking and unlocking leverages each including a catch are disposed symmetrically about the axis of the locking wheel so that the catches may selectively engage with or disengage from the teeth of the locking wheel by the operation of operating knobs exterior of the storage rack. When one of the catches is made into engagement with the toothed locking wheel while the other is out of engagement therefrom, the rotation in one direction of the locking wheel is locked while the rotation in the other direction is unlocked, and vice versa.

Abstract: The place shift-up mechanism of a digital clock comprises ratchet feed mechanism which permits manual setting of the clock even during the shift-up operation. The ratchet feed mechanism comprises an eccentric cam secured to a rotary shaft which also carries an eccentric operation pin. A ratchet wheel is rotatably supported by the shaft. A place shift-up lever is supported so as to be capable of rocking and sliding movement and has a forked leg plate with spaced legs receiving the eccentric cam between them. One leg of the forked leg plate has a feed pawl for engagement with the ratchet wheel and also a hook pawl engageable by the operation pin to move the place shift-up lever in one direction. The other leg of the forked leg plate has a return pawl which is engageable by the operation pin to move the plate shift-up lever in an opposite direction.

Abstract: This disclosure relates to a tool for rotating elements, such as nuts, bolts, screws or like fasteners, and includes a ring having ratchet teeth, the ring being driven by a lever, a pawl carried by the lever for engaging the ratchet teeth, a flexible tension-applying member in at least partial surrounding relationship to the ring, means for supporting the pawl, and the tension-applying member being disposed between the supporting means and the lever whereby upon movement of the lever in a first direction the pawl rotates the ring through the engagement of a tooth of the ring and the tension-applying member deforms slightly to frictionally grip the ring.

Abstract: A memorizing aid convenient to memorize foreign words includes an endless tape passing around two rolls and intermittently rotated by pressing a pushbutton. The tape bears information to be memorized, the information being seen through a pair of windows formed in a casing.

Abstract: A drum brake which comprises two brake shoes, an actuator situated between two first adjacent ends of the shoes and a fixed fulcrum block situated between the other two ends of the shoes. An adjuster is designed to increase the distance between the first ends of the shoes automatically as a function of the wear on the lining of the shoes. The adjuster comprises a lever pivoted at one end on a first of the shoes in the vicinity of the actuator. A pawl is pivoted on the first shoe and biased by a resilient member into engagement with a toothed sector formed on the other end of the lever. An operating member is responsive to an increase in the distance between the first ends of the shoes, so as to pivot the lever in the direction corresponding to adjustment of the brake. The resilient member comprises a spring of which at least part cooperates with the surface of the lever remote from the first shoe irrespective of the position of the adjuster.

Abstract: An operation member slidably supported on a base plate has opposed pawls which are spaced apart and project toward one another. A position control cam and an integral supplementary cam are rotatably supported on the base between the two pawls. The pawls are disposed on different planes so that a first pawl is engageable with the control cam and the second pawl is engageable with the supplementary cam. The operation member is spring biased in a direction to move the first pawl toward the position control cam. The position control cam is provided alternately with deep concaves and shallow concaves. When the first pawl of the operation member engages in a deep concave it is in one position. When it engages a shallow concave it is in a second position. The supplementary cam has teeth at positions corresponding to the concaves of the position control cam.

Abstract: An easily adjustable wrench having jaws that move relative to each other. The moving mechanism comprises a pinion gear which is pivotally mounted from one of the jaws and a gear rack on the other jaw with which the pinion gear engages. An actuating button pivots the pinion gear out of engagement with the rack for quick adjustment between the jaws while the pinion gear may be manually rotated for finer adjustments.

Abstract: An air percussion boring machine comprising a percussion means, a front head with a boring tool holder, a rear head with a hole mouth washer and a boring tool rotation mechanism synchronized with the percussion means. The boring tool rotation mechanism is provided with a stator with blades secured on its internal surface at an equal distance from each other. Installed inside the stator is a rotor with blades whose number is equal to the number of stator blades. Arranged in the rotor cavity is a sleeve wherein pawls are hinged, the pawls having means for pressing the pawls to a ratchet coupled to a tail piece of the boring tool for rotating it. The pawls in each pair are coupled to each other and are used to rotate the ratchet clockwise and counterclockwise. The means for pressing the pawls to the ratchet is made in the form of air power cylinders with pistons contacting the pawls.

Abstract: The disclosure relates to a safety belt retractor and more particularly to a mechanism for locking the spool of a seat belt retractor against rotation. A single pawl is provided with a pair of spaced teeth that sequentially engage complementary teeth on a pair of spool ratchets, respectively, thereby minimizing "bounce" of the pawl relative to the ratchets.

Abstract: In an electrically operated dispensing machine in which actuation is initiated by pulling a handle, the improvement comprises a device for simulating mechanical actuation by pulling the handle, the device comprising a ratchet member having a toothed surface and a member engaging the toothed surface as the handle is pulled, the engagement simulating a mechanical actuation.

Abstract: A parking brake mechanism for a motorcycle having a rear brake pedal which is to be depressed for applying a brake on a rear road wheel. An annular ratchet wheel is rigidly connected to the pivoted end of the rear brake pedal for simultaneous rotation therewith, and one or more pawls pivotally mounted within the ratchet wheel are spring biased into engagement with teeth formed on its inside surface. Normally, the pawls are held out of engagement with the ratchet teeth by a rotary cam ring. Upon angular displacement of this cam ring relative to the pawls, the ratchet mechanism functions to permit the rear brake pedal to be depressed but to prevent its return motion. The cam ring can be actuated either by a retractable footrest or by a hand lever on the steering handle of the motorcycle.

Abstract: An improvement in a safety belt reel in which a pawl is moved when a predetermined acceleration is exceeded to lockably engage a toothed wheel. The improvement includes a flexible member which is moved when the predetermined acceleration is exceeded so as initially to engage a tooth on said toothed wheel before said pawl causes locking of the reel. The flexible member is movable relative to the pawl whereby any impact between said member and said tooth is absorbed without causing a reaction on an acceleration responsive actuator such as a ball and saucer, or suspended mass, so that the pawl is subsequently urged into correctly phased engagement with the toothed wheel to lock the reel.

Abstract: A pilgrim step indexing mechanism provided with oppositely facing toothed ratchet wheels of the same pitch is associated with a single indexing pawl and an associated detent spring which not only detentably holds the ratchet wheels but also biases the indexing pawl to engage the ratchet wheels. The indexing pawl has two teeth one of which engages one of the ratchet wheels during a reverse stroke of the pawl to reverse feed both ratchets one increment and during a forward stroke of the pawl to advance both ratchets two increments. The ratchet wheels may be connected with a platen of a printer whereby a line of printwork, after printing, will be positioned two line spaces above the printing line for easy viewing.

Abstract: The present invention is related to an improvement in a double-acting ratchet and pawl for controlling the operation of a hand winch. The pawl is pivotally mounted and engageable in two different positions with a driving gear which in turn is engaged with a driven gear operably connected to a winch reel. The improvement of this invention is primarily related to the pawl design and mounting and operation means therefor. With the design of the present invention, the pawl may be pivoted into any one of three principal locations corresponding to forward winch drive, reverse winch drive, and free-running winch drive. A latch plate holds the pawl fixedly in the desired position. A handle is provided for operating the pawl and a spring compressed against the handle operably holds the pawl against the latch plate. The pawl and the handle are pivotally connected on a shaft and mounted pivotally with respect to one another. A coiled spring connects the handle to the pawl for moving the pawl when the handle is operated.