Abstract: A manually manipulatable and portable chain saw includes an elongate brake band operatively associated with the cutting chain of the chain saw wherein the brake band is of a flaccid loop construction positioned for selective braking engagement with a brake drum. An electrical solenoid in electrical communication with the trigger switch of the chain actuates the solenoid upon release of the trigger switch to release the trigger switch by an operator.

Abstract: A self contained servo mechanism (10, 110) for actuating a friction band assembly (13) in a planetary gear set. The servo mechanism (10, 110) is contained within a housing (25, 125) which incorporates a piston chamber (32, 132). The housing (25, 125) is demountably secured within a socket cavity (21, 121) provided in the transmission case (11, 111). A piston means (40, 140) is slidably received within the chamber (32, 132), and the piston means (40, 140) is operatively secured to an actuating pin (55, 155) that is slidably received within a pilot bore (34, 134) which penetrates the housing (25, 125) and which is aligned with the piston chamber (32, 132). The actuating pin is, in turn, operatively connected to a friction band assembly (13) within the transmission case (11, 111).

Abstract: The invention relates to an anti-roll back device of particular applicability to motor vehicles but which can be applied to any rotating member where in ordinary useage the rotatable member is required to be rotated in one direction and prevented from rotating in the opposite direction but which has the further capability of being activated to permit the rotation in the opposite direction as and when it is required.

Abstract: A casing receiving therein a power transmitting mechanism has opposed upper and lower side portions. A control valve for controlling a gear shift of a transmission is installed in the lower side portion of the casing. A band brake includes a brake band, a servomotor operatively connected to the control valve and one end of the brake band for selectively putting the brake band into a brake engaged state and a brake disengaged state and an anchor pin operatively connected to the other end of the brake band for receiving a reaction force therefrom. The servomotor and the anchor pin are installed in the upper side portion of the casing.

Abstract: A free-floating mount for mechanical parts has a finger portion for cooperatively engaging structure of a machine incorporating the mount, to limit its displacement and rotation. The mount is especially designed for use in an assembly by which braking force is intermittently applied to and relieved from a rotating machine member.

Abstract: An arm portion of a pivot member extending in the direction of a brake handle of a chain saw safety braking device is pivoted between a pair of pins of the brake handle. A locking leg portion of the pivot member is engaged with and released from a locking lever in accordance with the pivoting of the brake handle.

Abstract: A transmission band assembly including a circular band member 12 with connector members 14 and 16 disposed on the exterior of the ends of the band member, a friction lining 22 that is bonded to the interior surface of the band member 12, a first pair of spaced slot 24 that extend from one end of the band member 12 over approximately one half the length of the band member, and a second pair of slots 26 that are aligned with the first pair of slots 24 and that extend over the remaining length of the band member. A hole 28 extends therefor through the band member 12 and the lining 22 between the slots 24 and 26.

Abstract: A portable chain saw wherein the motor drives a hub which is coaxial with a cylindrical portion of the shaft for one sprocket wheel of the chain. A coil spring is wound around the hub and the cylindrical portion to normally transmit torque from the hub to the shaft and to brake the shaft in response to its disengagement from the hub as a result of pivoting of a guard for one hand of the operator. The guard is pivoted by the one hand when the chain saw wobbles or performs other undesirable movements. The coil spring, the hub and the cylindrical portion together constitute a so-called wrap spring clutch wherein the spring rotates with the hub until arrested by a pin-shaped decoupling element which is movable radially of the hub by a second spring in response to pivoting of the guard.

Abstract: An assembly is provided for intermittently applying braking force to a rotating member of a machine, and for positively effecting the release thereof, to enhance performance and efficiency. The device is purely mechanical in nature, and is particularly adapted for installation on an automatic screw machine to control chatter and backlash while optimizing power utilization.

Abstract: A chain brake which is manually adjustable into a cocked position and releasable by means of stored electric energy and a trigger, includes a permanent magnet circuit in which a movable armature is a part of a latch which keeps the brake in the cocked position. The permanent magnet has a coil exerting a counter directional magnetic field to the permanent magnet when it passes current. The holding force on the latch decreases and the brake is released when current from a capacitor passes through the coil.

Abstract: A braking arrangement for a motor-driven chain saw is disclosed. The braking arrangement is actuable by a releasing device and is held in the release position against a spring force by means of a latching device. The braking arrangement includes a brake band holding member to which a brake band is fastened. The brake band can be tightened around a clutch drum of the motor-driven chain saw by means of an ancillary chain brake device provided in addition to the chain brake device, so that the clutch drum is brought to an immediate stop. This braking action occurs also if the releasing device of the chain brake device is not actuated. In this way, the chain brake device remains activated thereby enabling it to act during operation of the chain saw, for example, in the event that the motor-driven chain saw kicks back while the saw chain is running.

Abstract: In a single-tank dehydration-type agitator-operated washing machine, the agitator and the dehydrating tank are driven by respective drive shafts which are operated by a clutch mechanism selectively in such a manner that the drive shafts are selectively rotated in association with each other or independently of each other. A brake band for operating the two drive shafts independently of each other and the clutch mechanism are operated by a lever. In order to positively engage the brake band with the lever, the lever is driven while the drive shafts are being rotated in one direction in association with each other. In order to cause the lever to engage with the brake band with a suitable timing, the brake band is provided with a collar-shaped engagement regulating plate having a cut formed therein.

Abstract: An emergency braking system of a chain saw including a hand guard located in front of a front handle bar, and an inertia trigger. The hand guard is pivotally supported by a body of the chain saw and urged by the biasing force of a spring to move downwardly so that its lower end is located in spaced juxtaposed relation to a lever of an actuation device. The inertia trigger is pivotally supported at one end thereof by the hand guard and biased so as to thereby prevent the hand guard from moving downwardly.

Abstract: A device for braking the saw chain (3) of a portable power saw (1). The power saw has a front handle (5) to be gripped by one hand (6) of the saw operator, and a rear handle (7) to be gripped by the operator's other hand (8). The device includes a brake means (11) capable of braking the saw chain (3) by means of an actuating member (12). This may have the shape of an L-shaped tube (12) which is connected to a kickback guard (9)on the power saw, and which can be operated by the operator's rear hand as a result of a coercion wrenching movement of the rear hand (8) if any kickback of the power saw will occur.

Abstract: Improvements are described for power mowers comprising a prime mover, a rotatable drive shaft driven by the prime mover and rotatable grass cutting means adapted to be driven by power from said drife shaft. The improvements involve including in the mowers (a) a centrifugal clutch interposed between the drive shaft and the cutting means, (b) apparatus enabling the prime mover to operate at a rate of speed at least high enough for the clutch to engage, and alternatively at a rate of speed low enough for the clutch to disengage, and apparatus including a pulley and at least one stationary belt frictionally engageable therewith for stopping rotation of the cutting means concurrently with the disengagement of the clutch.

Abstract: An anti-clash and anti-rattle brake for a multiple speed ratio transmission is engageable to apply a frictional braking force to the constantly meshed gears when a shift control device is in a free neutral position. The brake is spring biased toward engagement. It is disengaged by one cam device when the shift control device is moved from the free neutral position in one plane and by another cam device when the shift control device is moved from the free neutral position in another plane.

Abstract: A multi-speed accessory drive (10) employing a planetary gear reduction set (12). A cone clutch (89) linked to an output member (84), actuator (200) for moving the cone clutch (89) into engagement with the output pulley (84) and a band brake for selectively inhibiting the rotation of the ring gear (18) of the planetary gear set (12).

Abstract: A novel log-hauling carriage which features a band brake assembly for controlling rotation of a drum in the carriage. The carriage includes a rotatably mounted drum containing three sections on which are wound the main and slackpulling lines, and a drop line which is utilized in raising and dropping the logs. The band brake assembly includes a unique crank and lever system for actuating the brake band, whereby the brake band tightly grips the brake drum surface of the brake assembly, thus to prevent drum rotation, with the slackpulling line loose. The brake assembly is controllably released with tensing of the slackpulling line, differing degrees of tensing producing differing degrees of release of the brake assembly.

Abstract: A chain saw is disclosed having a drive motor which drives the sprocket wheel of the saw chain via a transmission stage. The sprocket wheel rotates in the same direction as the drive shaft of the drive motor and drives the saw chain in such a manner that the portion thereof traversing the lower periphery of the cutter bar moves toward the housing of the chain saw. The saw chain is braked with a braking arrangement which develops a braking moment that causes the chain saw to develop a reaction moment that opposes the kickback moment occurring as a consequence of the kickback action. In this way, the angle through which the chain saw is deflected during kickback is reduced. In addition, a compact configuration of the motor housing of the chain saw is obtained wherein the braking arrangement is kept free of dirt and chips.

Abstract: Disclosed is a safety stop that is operatively connected to the existing rotatively mounted front handle of a chain saw to independently actuate such safety stop to its actuated position to stop the rotation of the cutting chain upon rotation of such rotatively mounted front handle either automatically when "kick-back" occurs or upon such rotation by the operator at his option.

Abstract: The brake is provided with a resilient member between the brake band and a brake lever. In addition, the resilient member is provided with recesses in the form of bores in a part of a resilient member subject to compression. The construction of the resilient member is such that the recesses render the resilient member capable of damping high stresses.

Abstract: The invention is directed to a braking arrangement for a chain saw and includes a brake band and a brake drum which form friction partners with their associated friction surfaces during braking. At least the friction surface of one of the friction partners includes a material which is resistant to conversion to martensitic structure. Particularly suitable materials are those having a cubic face-centered lattice structure, such as, for example, austenitic steel or chrome-nickel steel.

Abstract: Front handle support means of a portable chain saw having a built-in internal combustion engine serving as a source of motive force includes a handle support arm connected to one lateral side of a machine frame and extending upwardly to support at its upper end one end of a handle pipe of a front handle. A projection is formed integrally at an upper end portion of the handle support arm and extends forwardly to support a hand guard. A plurality of shock absorbers are mounted on an inner side of the handle support arm to connect the internal combustion engine therethrough to the machine frame.

Abstract: A safety device for a chain saw conventional in its overall construction is disclosed which comprises mainly a brake lever pivotally supported by the housing of the chain saw and arranged to stop the cutting chain when the brake lever is actuated either by inertia or by engagement with the operator's hand. The brake lever is formed with a cam surface adapted to press an engaging member connected to the drive shaft out of meshing engagement with an interlocking wheel for driving the cutting chain so as to shut off the driving power to be transmitted to the interlocking wheel. The brake lever also includes a braking member secured thereto and adapted for movement therewith in synchronism with the arcuate movement of the cam surface, into frictional braking engagement with the interlocking wheel for effecting a brake effect on the cutting chain.

Abstract: A reaction brake band assembly for a multiple ratio power transmission mechanism comprising a brake drum connected to a gear element of the transmission mechanism, and a reaction piston engaged by the anchor end of the brake band for applying a threshold brake band force and for cushioning brake band application.

Abstract: The invention is directed to a braking arrangement for a chain saw having a housing and a guide bar mounted on the housing for accommodating a saw chain thereon. The brake arrangement includes a brake drum operatively connected to the saw chain with a brake band disposed in surrounding relationship thereto. A brake member is connected to the brake band and moves between a ready position whereat the brake band is disposed in spaced relationship to the brake drum and a released position whereat the brake band is drawn tightly around the brake drum. A brake spring resiliently biases the brake member to cause the brake member to pull the brake band tightly about the brake drum when in the released position. A latch arrangement holds the brake member in the ready position against the force of the brake spring. A cam connected to the drive motor rotates through a predetermined path.

Abstract: An automatic brake operating device to be used on a motor chain saw provided with a clutch drum around which there is a pretensioned brake band. By use of a spring and a toggle joint the band can be switched between a free position and a braking position. The toggle joint is operated between two corresponding positions by an inertia mass for releasing and a stirrup for resetting. The mass and the stirrup are individually movable and capable of triggering the brake independent of each other.

Abstract: A band brake assembly for a bicycle includes a brake band having a brake lining and a brake drum to which the brake lining is urged by a brake operating cable in braking. According to the invention, the band brake assembly comprises a wire guide whose front half is in the form of an arc and fixed to an operative end of the brake band and whose rear half extends in a tangential direction of the brake band. An inner wire of the brake operating cable extends rearward along an outer surface of the wire guide and is fixed to a rear end of the wire guide. With this arrangement, the lining, brake band, wire guide and inner wire form a multiple or laminated connection to permit these members to shift slightly with each other when braking, thereby preventing resonance and absorbing or damping vibration caused in braking.

Abstract: A chain saw safety-brake system including a pivotable member, and a screw located in side-by-side relation to the pivotable member and having a brake band connected thereto at one end. The screw can be operated from outside of the chain saw to adjust the length of the brake band. The pivotable member and the screw are assembled with a lock lever for locking a clutch drum and contained in a casing to provide a packaged unit.

Abstract: A piston-controlled locking mechanism including an external cylinder having annular retaining means, a first elongated piston located adjacent the cylinder and having ball lock positioning apertures in the extension, a second coaxially located piston positioned inside of the skirt of the first piston and having indentations capable of mating with the ball positioning portions of the first piston, and positioning elements for first moving the inner piston to release the balls and thereafter moving the outer piston to either release or lock the cylinder.

Abstract: A braking device for braking the saw chain of a portable motor-driven chain saw having a safety device which has a mass member, a locking lever being provided which is pivotably mounted on the hand guard lever and bears the mass member at its free, sprung end, co-operating by its other end with a control cam which bears against the brake lever and via which the braking operation of the rotating saw chain is controlled, in such a way that the braking operation of the rotating saw chain is automatically initiated, if an uncontrolled acceleration takes place, by the saw rolling down the timber trunk to be sawn at the moment when the saw becomes jammed, with the consequence that the resulting braking force counteracts the accelerating force, so that the recoil angle of the saw is reduced.

Abstract: A drive system for an exercise apparatus or the like. The system includes a rotatable member mounted on a frame together with a mechanism for rotating the rotatable member through a drive pulley operatively associated with the rotating mechanism and a driven pulley operatively associated with the rotatable member. It also includes an endless belt member drivingly interconnecting the pulleys such that the belt member imparts rotation of the rotating mechanism to the rotatable member through the drive and driven pulleys which occurs because of the fact that an inner surface of the belt member is in driving engagement with the pulleys. The system further includes a component frictionally engaging an outer surface of the belt member in the area in which the inner surface of the belt member is in driving engagement with the drive pulley to impart a resistance to rotation of the rotating mechanism. With this construction, the drive system is suitable for an exercise apparatus or the like.

Abstract: A chain saw safety braking assembly includes a sensing arm pivotally mounted to the housing and having a protrusion. A portion of the sensing arm is located in front of the gripping handle and is arranged to move from a first position to a second position in response to being struck by an appendage of the operator. A flexible brake band is disposed around the peripheral surface of a brake drum, and includes a first end anchored to the housing and a second end coupled to the sensing arm protrusion, such that when the sensing arm moves from the first position to the second position the flexible brake band is moved from a position free of the brake drum to a frictional braking relationship with the brake drum. A latch is rotatably mounted to the housing and is adapted to releasably engage the protrusion on the sensing arm. A spring anchored to the housing cooperates with the latch such that the latch yieldably holds the sensing arm in either the first or the second position.

Abstract: A brake or retarder for braking rolling railway cars preferably for shunting purposes incorporates an actuating member adapted to be given a movement by a passing railway car wheel, which movement via a speed-dependent coupling is transferred to a mechanical braking device when the speed of the movement exceeds a certain pre-set value.

Abstract: A hoist having a motor, gear reduction unit, drum, and an emergency brake on the drum or on a drive-coupled element close to the drum. A brake-actuating mechanism is operated in response to a mechanical out-of-sync detector with mechanical inputs directly from the motor shaft and drum shaft or a shaft coupled to the drum. The detector has an output shaft which signals to actuate the brake actuator when there is a variation in the relative angular velocities between the two input shafts to the detector to set the brake. In one embodiment, the output shaft rotation provided from the variation in the relative velocities of the input shafts also provides the force for applying the emergency brake. In another embodiment, the brake is set by a large force spring which is controlled by a trigger mechanism. In still other embodiments, the mechanical detector is driven by an overspeed or speed-sensitive clutch, and/or by an electrically operated clutch.

Abstract: The assembly includes (a) a rotatable shaft, (b) one or more pulleys secured to the shaft, the pulley having tapered walls, and (c) a belt having tapered walls to match the taper of the pulley. The belt is mounted on an arm or other member preventing the belt from rotating with the pulley. The belt is positioned and mounted so that it can be brought into frictional, rotation-slowing or rotation-stopping engagement with the pulley when desired.

Abstract: A differential band brake is independently spring loaded at each end so that changes in the differential braking force ratio can be conveniently effected by changing to springs of different strength such as are readily available on the commercial market, rather than by changing the parameters of other portions of the apparatus of types not so readily available.

Abstract: The invention relates to a braking mechanism for braking the chain of a portable power chain saw when a hazardous state occurs. The operating lever rotatably mounted on the chain saw casing is in operative connection with a control lever acting on a brake band by means of a lever-like device. Thus, in the braking position the control lever is transferred into an angular position with a simultaneous position change of the two brake band articulation points. As a result, the brake band is applied to the brake drum, which ensures that the braking mechanisms act without any delay.

Abstract: An band brake mechanism for an automatic transmission of an automobile, wherein a size and form of a band hoop is determined so that the band hoop may occupy a position by the elasticity in which any portion of the band hoop is not in contact with a drum when the band hoop is in set position before braking.Projections formed in one body with a housing are arranged around the band hoop for supporting and locating the band hoop in the set position, so that the full length of the band hoop keeps the constant space to the peripheral surface of the drum.

Abstract: A portable power tool includes a manually actuable safety lever and an inertial safety system for activating a brake of the tool to provide a more effective safety arrangement. A first spring applies the brake when the safety lever contacts the hand, wrist or arm of an operator during "kick-back" or like violent movement of the tool. A second spring is operable independently of the safety lever for also releasing the first spring. An inertia mass is displaceable effectively independently of the safety lever when the brake is in the inoperative condition. This inertia mass releases the second spring, so releasing the first spring and applying the brake, upon occurrence of "kick-back" or the like. Preferably, the second spring operates a hammer release mechanism for striking a locking lever releasably retaining the safety lever. A band brake of a chain saw or circular saw may particularly be operated in this manner.

Abstract: A hand, wrist and forearm exerciser device comprising a roller assembly adapted to be grasped by either one or both hands of the user for rolling or twisting of the assembly about its own longitudinal axis, clamping members secured to the opposite ends of the roller assembly for securing the device to a suitable support structure, such as a bench press apparatus, and an adjustable tensioning assembly operably connected with the roller assembly for applying a preselected resistance to the twisting of the roller to provide an effective and efficient hand, wrist and forearm exercising operation.

Abstract: A speed change control system for an automatic transmission for motor vehicles having a planetary gear mechanism and a brake band for altering the transmission ratio. The system is to tighten gradually the brake band. The system comprises a servo-piston, a piston rod secured to the servo-piston and to the brake band, and an accumulator piston axially slidably disposed in the bore of the servo-piston. The servo-piston is biased by a first spring for returning the servo-piston for releasing the brake band, and the accumulator piston is biased by a second spring. Apply side and release side oil chambers are formed on opposite sides of the servo-piston, and an accumulator oil chamber is formed by the accumulator piston in the bore. Pressure oil is applied to the apply side oil chamber, so that the servo-piston moves in a brake band engagement direction against the first spring. After that, the accumulator piston moves a predetermined stroke against the second spring.

Abstract: A brake system for a vehicle having front wheel drive includes a parking brake assembly (58, 60) comprising a band brake which is engageable with an existing universal joint (62, 64). The parking brake is independent from a pair of front brake assemblies 30 and a pair of rear brake assemblies 34. Each band brake is independently operated via cables (44, 46) so that failure of one band or cable does not affect the parking brake operation for the other band or cable.

Abstract: The brake uses a slow brake feature whereby a positioning member, such as a lever, is actuated directly via a first spring to cause braking in response to faults only on the weaving side as well as a fast or normal brake feature whereby the positioning member is able to transmit the braking force of a second spring to effect braking in response to faults on the weaving side or mechanical side. The second spring acts on the positioning member via an abutment which is moved against the positioning member upon release of the second spring. The second spring can be released via an electromagnet in response to a weaving fault on the weaving side or by a stop-motion rod in response to a mechanical fault.

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 external band brake control linkage includes a pair of anchor pins which are respectively connected to the opposite ends of a brake band. The linkage being operable between a normal released condition holding the anchor pins spaced apart so as to maintain the band disengaged from the brake drum and an operative condition wherein the anchor pins are moved together from the position they occupy when the linkage is in its released condition wherein the brake band is engaged with the brake drum. For the purpose of compensating brake band wear, the control linkage includes a link having a ratchet wheel-type adjusting nut threaded on a rod-like link thereof, the adjusting nut being advanced so as to change the spacing between the anchor pins. A paw or an adjusting nut operating lever is carried by a link of the control linkage and is operative in response to the link undergoing a predetermined movement, corresponding to brake band wear, to index the adjusting nut so as to compensate for wear.

Abstract: An original feeding system having a rotary drum provided with sheet original hold-down claws for clamping the leading edge of the sheet original against the surface of the periphery of the rotary drum and with a control mechanism for keeping the claws in clamping engagement with the sheet and releasing the claws from clamping engaging therewith. A belt drive is provided for feeding the copy sheet by holding same between the rotary drum and the belt. The rotary drum is adapted to be stopped in its rotation before it completes one revolution, while the belt drive continues to be driven to feed the sheet original, which is subjected to the frictional force exerted by the belt and slides along the surface of the rotary drum. Therefore, it is possible to feed a sheet original having a length larger than the circumferential length of the rotary drum.

Abstract: A brake control assembly for a chain saw has an operating lever provided with a hub portion alongside a housing of the saw and a guard portion adjacent a handle carried by the housing. The hub portion is pivotally mounted on the housing allowing the lever to be moved fore and aft. A brake drum associated with the drive-transmitting mechanism of the saw is engaged by a brake band when the lever is swung to a brake-on position. The pivotal connection for the hub portion also supports an actuating plate for rocking movement independently of the hub portion. There is a drive connection between the operating lever and the actuating plate which rocks the plate on the pivotal connection when the lever is moved fore and aft. A torsion spring tends to rock the actuating plate in one direction and urge the brake band into braking engagement with the drum. The housing is fitted with a resilient latch which engages the cam finger to hold the brake band out of braking engagement with the drum.

Abstract: An improved power tong brake apparatus provides an integral drum secured at a preferably integral mounting flange to the power tong jaw carrier. The drum has an exposed braking surface portion contacted during operation by a cooperating shoe which is adjustably attached to the tong housing.

Abstract: A throttle control device for use with a spring-return throttle wherein a rotatable sleeve on a handlebar must be rotated to advance the throttle, the throttle control device including a clamping arrangement receivable over the rotatable sleeve to be just forward of a handgrip normally received over the sleeve, the clamping arrangement having a tab that engages conventional equipment to prevent rotation of the clamping means, and including a lever operated cam for clamping the sleeve to hold the throttle in a pre-set position, the clamping arrangement being held in position by the handgrip.