Abstract: A disk brake device comprises a brake lever 3A toward which a tilting force is applied in opening operation. This brake lever 3A is formed at its lower end with an outwardly protruding stopper 58 into which an adjusting bolt 56 is screwed vertically. A base seat 59 is provided on a base plate 1 immediately under the stopper. A pinion 61 is fitted over an upper end of the adjusting bolt 56 via a one-way clutch 60 so as to rotate the adjusting bolt 56 only in a direction of fasting the same downward. A rack 67, which is supported by the base plate 1, is meshed with the pinion to have a predetermined backlash and to extend in a direction of swing of the brake levers 3A, 3B. This disk brake device allows to assuredly maintain the brake levers 3A, 3B at equally opened positions at left and right in a brake releasing condition, even if brake linings 9A, 9B are worn out and adjustment is made by an automatic lining wear adjusting unit 53 to automatically decrease the gap caused by wear of the brake linings 9A, 9B.

Abstract: An automatic brake adjustment for small transmissions, such as used with riding lawn mowers and the like. A brake disc rotated by the transmission is selectively engaged by friction producing pucks brought into engagement with the brake disc by a rotatable lever having a cam operating a puck. The axial position of the brake lever on its supporting shaft is determined by a threaded nut and automatic rotational nut adjustment is produced by a wheel having evenly spaced shoulders in the form of ratchet teeth defined upon its periphery selectively and sequentially engaged by a detent mounted upon the brake lever. When puck wear of sufficient extent occurs, the detent will sequentially engage the following shoulder of that previously engaged to rotate the brake lever adjustment nut during the next brake actuation thereby translating the brake lever and puck toward the brake disc to compensate for puck wear.

Abstract: A brake with an automatically adjustable stop (15) which interacts with a counterstop on base frame (2) and which is coupled to brake disk (3) for readjustment of brake jaw (5) in its venting position according to the wear which has occurred on brake linings (12).

Abstract: The invention comprises an in-line cable insert for the parking brake cable system of a vehicle which maintains an already established tensile preload by eliminating slack in the cable system which would reduce the preload. The insert comprises a cylinder having an internal chamber, a piston sealed by a diaphragm therein, and a stem connected to the piston comprising one or more sets of ratchet teeth and pawls rotatably connected within the cylinder which engage the ratchet alternatively in half pitch increments. The chamber of the insert is connected to a vacuum source such as the intake manifold of a vehicle engine. The insert maintains the tension in the parking brake cable system when vacuum created in the chamber of the cylinder causes the piston to move downwardly, thereby tightening the brake cable, when the vehicle is started.

Abstract: In an automatic play compensation arrangement for a cable-operated parking brake including a brake operating element and a cable extending between the brake operating element and a vehicle brake for actuating the vehicle brake, a support bracket is mounted for movement with the brake operating element and has a spring-loaded clamping lever supported therein through which a cable end extends and by which the cable end is firmly engaged with the support bracket when the brake operating element is actuated, and a spring is provided for tensioning the cable when the brake operating element is in a brake-releasing rest position.

Abstract: There are disclosed several embodiments of a disc brake caliper assembly in which adjustment is made for wear on the pads by a non-rotating linearly expandable and retractable linkage arranged between a brake actuator and the pads. The linkage includes inner and outer members coaxially reciprocal without rotation with respect to one another, one member having surfaces which extend at acute angle with respect to the axis and opposite surfaces on the other member which extend parallel to the axis. Circumferentially spaced wedges are disposed in the space between the angled and parallel surfaces, and springs between the first member and wedges yieldably urge the wedges in the first longitudinal direction toward the angled surfaces, the second member being movable during the braking cycle in a second longitudinal direction and thus relatively to the first member, whereby the linkage is caused to expand in order to adjust for wear.

Abstract: A hydraulic brake actuator which includes a cylinder, two pistons which are in the cylinder and which are movable apart by hydraulic pressure in the cylinder, a toothed rod which is engaged with one piston and which is movable to a limited extent axially relatively thereto, and a pawl which is secured to the other piston and which is engaged with the toothed rod, the rod and the pawl permitting the two pistons to move apart, but to move towards each other only to a limited extent.

Abstract: An adjuster to establish and maintain tension in a cable system including a reference body, and a ratchet member having succession of ratchet teeth each with a pass face and an abutment face. Two pawl members engage the ratchet member, both permitting passage of the ratchet member in the same direction. A flexible linkage anchored to the body and joining the pawl members multiplies the speed of one pawl versus the other along the ratchet member so as to maintain and adjust the residual tension in the cable system when the system is actuated and released.

Abstract: A brake-adjusting system in particular for motor-vehicle handbrakes which allows quick adjustment of the handbrake using two freewheel units of which one is employed for driving-conditions proper. As a result unintended brake adjustment shall be prevented. The housing of the system sub-assembly used to adjust the brake cable is divided longitudinally and all parts relating to operation are displaceable solely in the single operational plane of the freewheel units to actuate or to adjust the brake.

Abstract: A cable assembly for rotating a member in response to a rotating input, including first and second pulleys and at least one conduit extending longitudinally and interconnecting the first and second pulleys. At least one strand extends longitudinally through the conduit and at least partially about the first and second pulleys. The first pulley includes a slack adjustment mechanism for adjusting slack in the strands.

Abstract: An automatic one-shot adjusting apparatus which is applicable both for mechanically and for hydraulically actuatable duo-servo drum, brakes and which includes two ratchets (6, 14) interacting through springs (11, 15) and is capable of adjusting only upon the release of the brake.

Abstract: A cable assembly for rotating a member in response to a rotating input, including first and second pulley members and a conduit extending longitudinally and interconnecting the first and second pulley members. A pair of spaced strands extend longitudinally through the conduit and at least partially about the first and second pulley members. The first pulley member includes a slack adjustment mechanism for adjusting the slack in the strands.

Abstract: Parking brake apparatus of the reaction cable type includes quick-release cable slack adjusting means having a releasable clip member for retaining an adjusting rod against the biasing force of an adjusting spring at a given position relative to the reaction bracket housing. The clip member is of U-shaped resilient construction including a pair of leg portions that are resiliently biased together on opposite sides of a transverse wall portion of the housing containing an opening in which the rod is movably mounted. The clip member is displaceable orthogonally relative to the rod between a locking position in engagement with an annular groove contained in the rod, and a released position remote from the groove, whereby the rod is biased by the spring to remove cable slack.

Abstract: A cable control system for dual actuators wherein movement of a strand of a first cable is transmitted equally to second and third strands of respective actuators which includes a device comprising a one-piece body having spaced parallel walls with aligned openings therethrough. The first cable extends through the opening and the second cable is fastened at the other end of the device such that when the first cable is actuated, a force is transmitted to one of the actuators through the first cable and the reaction force on a conduit surrounding the first cable is transmitted through the device through the second cable to the other of the actuators through the device.

Abstract: The invention relates to an automatically adjustable spacer for a drum brake, comprising essentially a first part (10) bearing at one of its ends on a first shoe (3), a second part (16) bearing at the opposite end on the second shoe (2), the first and second parts (10, 16) being mounted slidably longitudinally relative to one another, a locking element (30), at least part of the periphery of which has a toothing, mounted movably on one of the first and second parts and capable of meshing with a corresponding toothing (28) provided opposite it on part of the periphery of the other of the first and second parts, so as to define a device for the automatic extension of the spacer as a function of the wear of the friction elements.

Abstract: An automatic length adjuster particularly for a clutch control cable comprises a tubular body telescopically engaged with a hollow cylindrical body traversed by the clutch cable which is anchored to the tubular body so as to be tensioned in use by a compression, compensation spring interposed between the bodies. The cylindrical body houses a mechanism for connecting the control cable operatively to the cylindrical body at different relative longitudinal positions so that control forces are transmitted from the cable to the clutch lever via the cylindrical body, in use, the said relative position changing with changes in the position of the clutch lever due to wear of the clutch disc linings. The adjuster is further provided with a system retaining it in a contracted condition to facilitate installation.

Abstract: A vehicle clutch control cable comprises a primary cable part, a secondary cable part, and a length adjuster interposed between the cable parts for automatically adjusting the effective length of the control cable with changes in the position of a clutch member controlled by the cable, the length adjuster including an elongated body including two ends and provided with an opening in one of the ends for passing the primary cable part and an opening in the other of the ends for passing the secondary cable part, interconnecting members located in the body and interconnecting the cable parts to allow a control force applied to the primary cable part to be transmitted through the secondary cable part to the member in use, and a compensation spring acting on the interconnecting means to automatically vary the position of an interconnection of the cable parts with respective changes in the position of the member.

Abstract: A manually operated and locked conduit length adjuster system comprising a cable adapted to be connected at one end to an actuator and at the other end to a device to be actuated, a first length of conduit adapted to be attached at one end to a fixed point and at the other end to a manually locked conduit length adjuster. The manually locked conduit length adjuster includes a plastic body adapted to be attached to the first length of conduit and having an opening through which a plastic slider extends. The slider includes annular teeth and the plastic body includes a locking member integrally hinged to the plastic body and adapted to be moved into position to cause teeth thereon to engage the teeth on the slider. The locking member has other portions thereof which engage the body for locking the locking member in position.

Abstract: A self-adjusting hand brake assembly comprises a rack mounting a carriage biased for movement lengthwise thereof in direction by a spring. A pawl on the carriage engages the rack to retain the carriage in position. An anchor member is movable lengthwise of the rack and carriage, and comprises a member to which a brake-operating link is attached. A lever pivotted on the carriage is operable to move the member in direction to apply the brake. The member is retained in position by a pawl engaging the rack, which can be released by a button operating through a linkage to release the brake. The spring is of strength sufficient to take up slack in the brake linkage but insufficient to apply the brakes.

Abstract: A push-pull control with a housing and a push-pull rod displaceable in the housing. The rod is joined via a jointing piece to a control cable. The push-pull rod is provided at its end with a neck portion and a ball, which engages in a bore and a slot in the jointing piece. A sleeve which is limitedly displaceable on the push-pull rod engages the jointing piece and fixes it radially relative to the rod.

Abstract: The automatic adjustment of a drum brake is obtained by way of an adjusting lever (30) fitted to pivot on one (12) of the brake shoes when the wear of the friction linings (16) on the brake shoes (12) warrants it. This lever rests against a spacer (44) connecting the ends of the brake shoes between which the brake motor is located, such that the position of the lever (30) determines the distance apart in the rest position between these two ends when this motor is not actuated. Two surfaces opposite one another (48, 50) formed respectively on the spacer (44) and on the lever (30) define an operating clearance between them beyond which an adjustment is made when the brake is actuated. A lug (56) on a bimetal strip (52) takes up the space between the surface (48, 50) in order that an inadvertent adjustment does not occur due to an overheating of the brake drum when the temperature exceeds a certain threshold, thus increasing the operating clearance.

Abstract: The automatic adjustment of a drum brake, when the wear of the friction linings carried by the shoes justifies it, is obtained by way of an adjusting lever (30) mounted pivotally on one (12a) of the shoes and carrying a toothed quadrant (30a), on which a pawl (34) is normally engaged. A spacer connecting the ends of the shoes between which the brake motor is located interacts with the adjusting lever by way of a connection with play. To prevent inopportune adjustment as a result of heating of the drum, a blocking member (52) carried by a metallic strip (50) fastened to the pivot pin (36) of the pawl (34)immobilizes the latter in terms of rotation when the temperature exceeds a certain threshold, thus increasing the functional play.

Abstract: A self-adjusting cable control device for automatically compensating for wear in a control cable system. The device includes a termination member connected at one end of a control cable and a connecting member attached to an actuation member. The connecting member carries a clutch for locking with the termination member upon application of force to the actuation member. Spring means are provided to move the cable with respect to the actuation member when the clutch is disengaged from the termination member. The clutch comprises a plurality of collet members which are movable radially and longitudinally and surround the termination member. The collet members have conical surfaces at one end adapted to engage complementary conical surfaces on the connecting member and serrations which engage complementary serrations on the collet members.

Abstract: A device is placed between an end of a control wire which operates a clutch device of an automobile and an operating device, in order to automatically eliminate slack and excessive tension in the control wire. A first link is connected to the wire. A second link is connected to an operating device for linear movement relative to the first link. An adjusting spring is provided for resiliently urging the first link in a wire-pulling direction. A locking structure is provided for combining the two links with each other and releasing the combining state thereof when the operating device is situated at a region near a return-end-point.

Abstract: An automatic self-adjusting cable system comprising first, second and third cables, each including a conduit and a strand extending through the conduit. A self adjusting mechanism is provided and includes a housing, an inner member movable axially relative to the housing and a clutch between the housing and the member comprising a plurality of collet members which are movable radially and longitudinally and surround the member to cause teeth on the collets to disengage and engage teeth on the axially movable member. A spring extends between the collet housing and the conduit of the first cable. The strand of the first cable is connected to the movable member of the collet assembly. The strand of the first cable extends through the inner member of the collet clutch and is attached to the strand of the third cable. The strand of the second cable is connected to the collet housing. When a load is applied to the strand of the first cable, the strand tends to move toward the collet housing.

Abstract: A strut type automatic gap regulator for a drum brake in which a pair of brake shoes are mounted opposite each other and adapted to be moved apart in a braking action. Toothed portions of a strut engage similar toothed portions of a latch which engages a shoe for linear movement therewith. A first spring extends between the one shoe and the latch to urge the toothed portions together while a second spring extends between the strut and one shoe to bias the strut in a direction to extend its effective length.

Abstract: A self-adjusting cable control device for automatically compensating for wear in a control cable system. The device includes a termination member connected at one end of a control cable and a connecting member attached to an actuation member. The connecting member carries a clutch for locking with the termination member upon application of force to the actuation member. A spring is provided to move the cable with respect to the actuation member when the clutch is disengaged from the termination member. The clutch comprises a plurality of collet members which are hinged to the connecting member and are movable radially toward and away from and surround the termination member. The collet members have conical surfaces at one end adapted to engage complementary conical surfaces on the connecting member and serrations which engage complementary serrations on the termination member.

Abstract: A self-adjusting engine clutch control cable comprising a movement-transmitting core (1) sliding within a guiding conduit (2) is provided with a self-adjustment device comprising a clamp (3) for releasably connecting one end portion of the conduit (2) to an abutment (4). A clamp component (5) is connected to one end portion of the conduit (2) by a slip-coupling (9). When a load (29) is applied to the core (1) by depression of the clutch pedal, movement of that end portion of the conduit is transmitted to component (5) via the slip coupling. Jaw elements (17,18) of that component (5) close onto that conduit portion while permitting it to advance in the clamp against biasing spring (27). On its release, that conduit portion moves back to a position depending on the action of spring (27) and on any end-of-cycle cable loading imposed by the clutch clamping spring as a result of clutch wear.

Abstract: In a cable-and-sleeve connector, variations in the real or effective length of the cable 3 will tend to vary the curvature of the sleeve 7, and this can be accommodated by variations in the effective length of the sleeve 7. For this purpose, one end of the sleeve 7 is adjustably fixed to an anchor 6 by a clutch 30. The clutch consists of four collet members 31 that, when effective as a clutch, are wedged within the tapering aperture 29 so as to be held with the serrations 32 on the internal surfaces of the collet members 31 mating with external serrations on the rigid end of the sleeve 7. When the clutch 30 is disengaged, the collet members 31 move out of the aperture 29, in the direction of the sleeve 7, and tilt loosely about their wider ends so that the wider ends are only just free of the serrations 21.

Abstract: The invention relates to a drum brake for an automotive vehicle, comprising two brake shoes (18, 20) adapted to be moved apart by a wheel cylinder (14), one (18) of said shoes carrying an adjuster including a lever (40) having a free end (48) defining a toothed sector (52) cooperating with a pawl (44) also carried by said one shoe (18), a strut (50) being provided between the other shoe (20) and the lever (40) to automatically control pivoting of the latter.A link (74) disposed between the pawl (44) and the lever (40) to prevent pivoting of the latter through more than a predetermined angle relative to the position occupied by the lever (40) when the lining carried by the shoes (18, 20) are new.

Abstract: A cable control apparatus for selectively locking a cable in a plurality of axially disposed positions. The apparatus includes a movable cable having a first end connected to a biasing unit for biasing the cable away from the apparatus and a second end upon which a force may be exerted, a control unit affixed to the cable, a first track unit for receiving the control unit when urging the control unit away from the biasing unit a second track unit for receiving the control unit when returning the control unit to an at rest position, a plurality of third track units for receiving the control unit when locking said control unit in other than said at rest position, and a plurality of fourth track units for receiving the control unit when moving the control unit from the first track unit to the second track unit, with at least one of the fourth track units being positioned between at least two of the third track units.

Abstract: An internal shoe drum brake incorporates an automatic adjuster which includes and adjuster element carried by one of the brake shoes, a strut extending between the shoes and engaged by the adjuster element and a rotary adjuster cam mounted on the same shoe as the adjuster element, or a parking brake lever pivoted on the shoe, the cam engaging the adjuster element in a non-rotatable manner. When the shoes are separated for braking, excess shoe separation causes the adjuster element to be disengaged from the cam so that the cam is rotated by a spring to re-engage the adjuster element and thereby establish a retracted position of the shoes.

Abstract: The invention relates to a drum brake in which the strut (32, 132, 232) is maintained at an approximately constant distance relative to the brake motor (20, 120, 220). The brake comprises a strut (32, 132, 232) disposed between two brake shoes (12, 112, 212; 14, 114, 214) and maintaining the brake shoes in spaced-apart relationship through a wear compensating device (38, 137, 138, 237, 238). The strut includes an inclined plane (60, 160, 260) cooperating, in proportion to wear of the friction elements (16, 116, 216; 18, 118, 218), with a projection (64, 164, 264) carried by one shoe, the inclined plane approximating an arc of a circle centered on the center of rotation of the associated shoe during wear of the associated friction elements. The invention may be applied to brakes for automotive vehicles.

Abstract: An internal shoe drum brake having a pair of brake shoes mounted on a back plate with double ended expanders located one between each pair of adjacent ends of the shoes. The expander has a strut assembly slidable within itself so that when the expander is operated the strut assembly transmits braking loads from one shoe to the other so that the brake operates in a duo servo mode. With the expanders arranged to operate vertically the weight of the shoes and acts against the strut assembly. In order to support the upper brake shoe and prevent the shoes moving off-center a variable length support acts between the upper shoe and the wheel cylinder. The support has a spring therein so that the support can resiliently collapse when the sheos move during duo servo braking.

Abstract: The parking brake cable is loaded and then maintained at a substantially constant tension force existing while the parking brake is not applied. This tension force maintains the parking brake in adjustment, permitting initiation of parking brake application with an increase in cable tension force which minimizes lost movement of the parking brake control mechanism to move the brake shoes into friction contact with friction braking surfaces.

Abstract: An internal shoe drum brake automatic adjuster comprising a strut extending between one brake shoe and a wedge, mounted between the strut and an abutment on a second brake shoe. The wedge is spring loaded to increase the spacing between the adjacent end of the strut and the abutment. The wedge has serrations thereon that engage with a pawl on the second brake shoe so that the wedge can only move to increase said spacing and not in the reverse direction. There is also provided a brake in which the strut is engageable with a mechanical lever pivoted to the one brake shoe. The brake is de-adjusted by moving the lever so that it no longer contacts the strut.

Abstract: An automatic mechanical brake adjuster for a walk-behind lift truck includes a lever (59) with two relatively pivoted parts (58,76) including a ratchet mechanism (96) therebetween. The ratchet mechanism (96) includes a ratchet wheel segment (77) and cooperating pawls (101-104). The brake adjuster also includes an extensible link (126) which determines the brake shoe back-off distance and cooperates with the ratchet mechanism (96) in effecting pivotal adjustment between the lever parts (58,76).

Abstract: A parking brake cable adjusting device having a brake lever, an actuating cable connected to a brake-operating mechanism, a control cable interconnecting the brake lever and the actuating cable, and a ratchet mechanism interconnecting a first end section of the control cable and the brake lever in a manner to permit the control cable first end section to advance in one axial direction relative to the brake lever in a manner to take up any slack in the cables.

Abstract: A self-adjusting cable control device for automatically compensating for wear in a control cable system. The device includes a termination member connected at one end of a control cable and a connecting member attached to an actuation member. The connecting member carries a clutch for locking with the termination member upon application of force to the actuation member. Spring means are provided to move the cable with respect to the actuation member when the clutch is disengaged from the termination member.

Abstract: The invention comprises a wear-compensating device for incorporation in a control linkage used for operating a motor vehicle clutch. The control linkage is arranged between the declutching fork and the clutch pedal and the device comprises two coupling parts, each of which is linked respectively to two successive sections of the linkage.According to the invention, the outermost coupling part carries a sleeve divided into jaws so that it can pass elastically from a free configuration of disengagement, at which the jaws are at a distance from the innermost coupling part, to an enforced configuration of engagement, at which the jaws are clamped to the latter.The device compensates for wear of the clutch friction surfaces by changing the effective length of the control linkage.

Abstract: An improved pawl and ratchet mechanism is disclosed wherein at least one of a plurality of pawl elements movably disposed within a housing is movable into a least one of the spaces between the teeth of a toothed track ratchet irrespective of the location of the housing with respect to the toothed track ratchet when the housing engages the toothed track ratchet. The improved pawl and ratchet mechanism may be used to contain explosive forces resulting from a pressure failure during the hydraulic testing of pipe.

Abstract: Apparatus of increased simplicity, reliability and economy is provided for automatically maintaining the tautness of a mechanical coupling such as commonly employed, for example, between a vehicular brake and its actuating mechanism, which would otherwise be subject to loosening during normal use as a result of wear or the like. The apparatus, although also utilizable with mechanical couplings employing rigid connecting links, is especially suited for use with couplings employing flexible cables or the like, wherein it need only be interposed in series with the cabling between the actuating mechanism and the device actuatable thereby, thereby adapting the apparatus for use in a variety of applications in which control cable couplings are employed.

Abstract: A device which automatically compensates for wear of a motor vehicle clutch by the engagement, during a working stroke of a pawl end of an arm with a tooth of a locking element and subsequent disengagement of the pawl end upon the return stroke of a fork and lever due to the abutment of a stop with the arm, which allows the lever to rotate and carry the locking element out of engagement with the pawl end, a spring biassing the arm and the element together to allow the pawl end to engage a further tooth, if necessary, to compensate for wear prior to the next working stroke.

Abstract: A device which automatically compensates for wear of a motor vehicle friction clutch by the engagement, during a working stroke, of a pawl or knurled element co-operating with a locking arm, with a toothed surface or knurling on a first link, and subsequent disengagement of said pawl upon the return stroke of a rocker arm due to the abutment of a stop with a second link which allows the first link to rotate out of engagement with the pawl, a spring biassing the links together and allowing the pawl to engage the first link in a wear-compensating position prior to the next working stroke.

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: The invention relates to an operating control device for an automobile engine assembly unit comprising successively a clutch and a gear-box equipped with an inertia brake, the control comprising a pressure plate carried on a declutching stop and adapted, by an axial displacement of the clutch in the direction of action, to apply a friction disc against a reaction surface on the casing of the gear-box, the disc being keyed for rotation with the input shaft of the gear-box while remaining axially slidable on this shaft; the control device further comprises a unidirectional axial coupling device located between the declutching stop and the pressure plate, this unidirectional coupling permitting an axial sliding movement of the pressure plate only in the direction opposite to the direction of action, and retaining members intended to engage the pressure plate when the declutching stop moves in the direction opposite to its direction of action.

Abstract: A self-adjusting release mechanism for a clutch assembly for automatically adjusting the increased or decreased displacement of a release bearing in a clutch mechanism. The release bearing is normally spaced from release levers of the clutch mechanism but engageable with the release levers to effect disengagement of the driving connection between driving and driven shafts when the clutch assembly is actuated. The self-adjusting release mechanism has a retainer mechanically connected to a clutch pedal of the assembly. The retainer has a hollow portion with at least one end open through which is positioned one end of a rod member that has its other end mechanically connected to the release bearing. A cam member is disposed in the hollow portion between the retainer and the rod member for selective engagement and disengagement with the rod member in response to the relative movement between the cam and the retainer.

Abstract: A pair of brake levers each having a brake shoe thereon acting in opposite directions against a brake drum have one end pivotally mounted and the other end of one brake lever is pivotally connected to a pivotally mounted operating lever. A rod is pivotally connected between the other brake lever and the operating lever. The operating lever is moved in the non-braking direction by an actuator and a spring pivots the operating lever in the other direction to apply the brake shoes. The end of the rod pivotally connected to the operating lever has a uni-directional drive thereon to adjust the effective length of the rod only when the operating lever is moved in the non-braking direction to compensate for wear of the brake shoes.

Abstract: The supporting structure of a disk brake for a bicycle includes a tubular guide bounding a cylindrical, axially open passage in which first and second actuator members are axially movable, the first member being moved angularly by an operating device while the second member is secured against angular movement and moved axially by an interposed cam mechanism in response to the angular movement of the first member. A casing mounted on the first actuator member for limited axial movement partly envelopes the guide. An opening in the casing in a plane transverse to the axis receives a disk attached to the wheel to be braked for axial engagement between brake linings on the casing and the second actuator member respectively when the first actuator member is moved by the operating device.

Abstract: Movement of a fluid pressure operated piston serves to engage a scrubber block with a railway wheel by means of motion of a piston rod. The piston rod is toothed to engage a take up mechanism for adjusting a clearance between the scrubber block and the wheel.