Showing papers on "Torsion spring published in 1986"

Seat suspension device

Abstract: A seat suspension device for use in an automotive seat which comprises a pair of right and left X-shaped links for connecting a lower frame with an upper frame and a torsion bar journaled to the pivotally-connected portions of the two X-shaped links. The torsion bar includes two ends, with one end thereof being engaged with one of the X-shaped links and the other end engaged with the other X-shaped link, so that the upper frame can be supported resiliently relative to the lower frame.

Vehicle with steering-controlled torsion bar stabilizer

Abstract: An anti-sway system for a steerable vehicle of the type employing a torsion bar suspension system. Operatively coupled to the torsion bar for each of the vehicle's steerable wheels or skis is a mechanism for increasing the effective spring rate of the suspension upon cornering over that prevailing when steering a straight line course.

Coil torsion spring mounting cones with groove break and method of mounting

Abstract: This invention relates to a novel anchor cone and winding cone apparatus and method for mounting a coil torsion spring to an overhead door. Indicia are provided on the cones to assure proper orientation of the cones to the spring and the cone/spring assembly to the overhead door. The winding cone includes arrow indicia to clearly indicate the direction of rotation for the winding cone to increase tension on the coil torsion spring. A groove break is provided in each cone to substantially reduce chafing and wear of the corresponding coil of the coil torsion spring.

Torsion spring cartridge

Abstract: A torsion bar suspension unit includes a pair of hubs, one of which is attached to a rotationally oscillatable member, and torsion bar means secured and extending between the two hubs. Various improvements to the structure are provided.

Smoothing device for rotation of propeller of boat propulsion machine

Abstract: Several embodiments of coupling devices for marine outboard drives for providing a coupling between an engine output shaft and the outboard drive, drive shaft. Each embodiment employs as the coupling a first portion that provides a relatively resilient driving connection for absorbing low speed torque vibrations and a second more rigid driving connection for providing a more positive power transmission at high speeds and high loads. In some embodiments, the more resilient connection is provided by a spring which may comprise either a torsional spring or a torsional coil spring. In other embodiments, elastomeric elements provide the driving connection.

Adjustable bag holder

Abstract: An adjustable bag holder includes two U-shaped elements with a first leg of each pivotally connected to each other intermediate their ends and a second leg of each of the U-shaped elements pivotally connected to each other at the same location as the first legs are pivotally connected to each other so that the pivot axes are aligned. A torsion spring surrounds the pivot of the first legs and has one end connected to the first leg of one of the U-shaped elements and its other end connected to the first leg of the other U-shaped element. A second torsion spring surrounds the pivot of the second legs and has one end connected to the second leg of the one U-shaped element and its other end connected to the second leg of the other U-shaped element. The two torsion springs cooperate to continuously urge a connector, which extends between the two parallel legs of the first U-shaped element, and a connector, which extends between the two parallel legs of the second U-shaped element, away from each other so that a bag having its open end positioned over the two connectors is maintained under tension. When the bag holder is to be collapsed for storage, a locking ring is moved from a position adjacent one of the pivots in which the ring surrounds both of the legs connected thereto to a position in which the ring surrounds both of the connectors and holds them adjacent each other.

Device for locking rod against movement in extending and contracting directions

Abstract: A device for locking a rod against movement in an extending or contracting direction is disclosed. In the device, a torsion spring is provided between a cylindrical receptacle and an operating member rotatably mounted thereon. The rod member, which is inserted in the receptacle, is normally locked against movement by the torsion spring. The rod can be released from the locked state for movement in an extending or contracting direction by releasing the clamping force of the spring by turning the operating member.

Door fitting device capable of adjusting axis of rotation and torque

Abstract: A door fitting device capable of adjusting an axis of rotation and torque, which makes it possible to connect easily a torsion bar and a worm wheel and to engage the worm wheel with a worm. The door fitting device itself can be assembled easily and rapidly in parallel with fitting of the door to an upper and lower frame.

Spring-tilt mechanism for a chair or seat

Abstract: The spring-tilt mechanism comprises a support frame (4), a seat portion (1) tiltable on the support frame (4) about a substantially horizontal axis (2) between a first and a second position, eg defined by stops (13, 13') One end (15') of a torsion spring (15) is fixed against rotation in the support frame (4) A gear box (16) is operatively engaged with the other end (15") of the torsion spring (15) and has an extendible member (24) engageable with a tracking surface (31) of the seat portion (1) An operating member (29) on the gear box (17) is easily accessible to a user sitting on the seat portion (1) to pre-load the torsion spring (15) for cushioning the user on the seat portion (1) between the said first and second positions (stops 13, 13')

Torsion damping mechanism

Abstract: A torsional damping mechanism (22) adapted to be disposed between an engine (10) and a transmission (12) operative to drive ground wheels (16) of a vehicle. The mechanism includes a viscous damping device (30), an idle rattle assembly (32), a torque transmitting torsion spring bar (28) disposed in series with the idle rattle assembly and in parallel with the viscous damping device, and a mechanical friction assembly for connecting the mechanism to the engine. Mechanism (22) is structurally configured to have a low inertia. The viscous damping device includes lost motion means (48k, 50c) which allows attenuation of low amplitude torsionals without damping.

Dynamometric screw-driver

Abstract: A screw-driver includes, disposed inside a driving handle, a torque limiter having a torsion spring in which one end of a helical friction band carries a ring connected by axial splines to a stem of the tool while the corresponding end of the torsion spring is fixed to a ring connected to the stem by a helical spline. An adjusting sleeve solely movable in rotation is screwed on the stem and, when it rotates, causes an axial displacement of the stem and modifies the relative angular setting of the two end rings, i.e. the torsion of the spring and consequently the value of the sliding torque.

Torsion spring powered missile wing deployment system

Abstract: A foldable missile wing (14) is deployed by means of an overcenter linkage (23) powered by a torsion spring assembly (58) capable of exerting a generally linear bias on the linkage over its full range of motion A separate lock linkage (68) maintains the foldable wing in a deployed position until release actuation of the lock linkage occurs thereby enabling wing deployment

Dynamic torquemeter calibration of bicycle ergometers.

Abstract: Bicycle ergometers as widely used in both clinical testing and exercise physiology studies are mechanical, hydraulic, or electromechanical devices. They are thus subject to change and error, creating a need for repeated calibration. We have developed a compact inexpensive torquemeter that permits dynamic calibration of the entire range of an ergometer. The torquemeter continuously measures the input torque at the pedal shaft of the ergometer and thus includes all work done in the drivetrain. It also permits adjustment of electrically braked ergometers to a specified torque using internal adjustments to give correct scale readings. The torquemeter depends on a high carbon steel torsion spring whose ends are rotated in angular deflection by increasing applied torque. Relative rotation is sensed through a multiturn potentiometer, the resistance of which is measured externally through a slip ring contact.

Overhead door torsion spring assembly and method

Abstract: A torsion spring assembly for counterbalancing overhead doors which includes an elongated helical torsion spring with coils that are normally spaced apart (when the spring is untensioned), a shaft extending through the spring, and a pair of spring-mounting collars carried by the shaft and provided with slotted neck portions operatively connected to pre-formed hooks at the ends of the spring. One of the collars is fixed against both rotational and axial movement upon the shaft; the other is rotatably mounted upon the shaft; and at least one of the collars is removable from the shaft for field disassembly and reassembly of the parts. The method for constructing the assembly, either during manufacture or in the field, is also disclosed.

Wire-type window regulator with wire tensioner

Abstract: Pull-up and pull-down wires extend toward each other from opposed positions with respect to a glass pane carrying member and are connected at their leading ends to spaced portions of the carrying member in such a manner that the two wires extend along a common line. A wire tensioner is mounted on the carrying member for tensioning the wires. The tensioner includes a torsion spring having outwardly extending end portions at least one of which is engaged with the leading end of one of the wires to bias the same toward the other.

Damper disc with serial torsion springs

Abstract: A damper disc with serial torsion spring, in which a pair of projecting hub-side flanges protruding radially outwardly are provided on a central hub, a pair of side plates fitting rotatably onto the hub and having holes extending in a disc circumferential direction are disposed on both sides of the hub-side flange, a pair of retainers having respectively a pair of retainer-side flanges fitting rotatably onto the hub and protruding in a disc radial direction are disposed in between the hub-side flange and the side plates, a coil spring extending approximately in the disc circumferential direction is interposed between the retainer-side flange and holes of side plates and the hub-side flange to resiliently couple the hub and the side plates in the disc circumferential direction; characterized by that said coil spring is composed of a high-rigidity large-diameter main spring and a low-rigidity small-diameter sub spring fitted therein, one side of the pair of retainer-side flanges has a projection protruding to one side of the sub spring contacting therewith, another side of the retainer-side flanges has a projection protruding to another side of the sub spring, thereby the projection of the retainer-side flange is adapted to compress only the sub spring at an initial stage of twisting of the disc.

Power steering gear adjusting mechanism

Abstract: A means of adjusting the angular relationship between an input shaft and a torsion bar extending coaxially through the input shaft in the hydraulic valve of a power steering gear which consists of a pin extending through transverse radially extending aligned holes in the torsion bar on the input shaft the pin and the holes being shaped so that rotation of the pin about its axis causes a limited degree of rotation of the torsion bar relative to the input shaft. A pin is provided with means whereby it can be rotated about its axis and so that it can be fixed in a desired position in relation to the input shaft.

Electromagnetic type booster

Abstract: PURPOSE:To minimize effect at the time of breakdown of an electromagnetic type magnification device that is utilized as a motor-operated type power steering device or the like, by controlling an electric current, which is controlled at a value in accordance with input torque, according to the presence or absence and operation direction of input torque by means of a changeover switch. CONSTITUTION:The rotor 10 of a motor 9 is provided around an output shaft 6 which is arranged coaxially with an input shaft 1 given steering torque by a steering wheel, and which is connected with the input shaft 1 through a torsion bar 15. This rotor 10 is rotated with a pair of magnets 40 provided on the inner perimeter surface of a case 2, and transmits its rotation to the output shaft 6 through a planetary gear deceleration device 48, and gives the auxiliary power of steering to the output shaft 6. The current flowed in the rotor 10 is controlled by an electric current value control means consisting of a transistor circuit, and a changeover switch 68 responding to the presence or absence and direction of input torque, on the basis of the output of a torque sensor 65 containing a detection plate 24 that links with the relative rotation of input and output shafts 1, 6.

Stabilizer arrangement for drivable motor vehicle axles with independent wheel suspensions

Abstract: This invention relates to an arrangement of a torsion bar stabilizer at a drivable motor vehicle axle with independent wheel suspensions, the wheels of which being guided by means of a plurality of individual links. By means of this arrangement, a housing of the torsion bar stabilizer between the axle and the vehicle body is made to require little space in upward direction. The assignment of the stabilizer legs to the wheel carriers also do not force a limitation of the rim of tire width of the vehicle wheels. According to the invention, this is achieved by the fact that the legs of a U-shaped torsion bar stabilizer are in each case arranged between a camber strut and the axle shaft of the wheel suspensions. Thus the stabilizer legs are located inside the wheel suspensions or behind their wheel carriers and no longer project over the same in an upward direction. In this case, the stabilizer legs can be moved close to the wheel carriers and as a result, the transmission of the torsion bar stabilizer can be optimally designed.

Damper disc equipped with torsion spring in series arrangement

Abstract: PURPOSE:To vary torstion rigidity in two steps so as to improve vibration absorbing effect by compressing only the spring having a small rigidity by the projection of a retainer-side flange which is rotatably fitted onto a hub and projects in the direction of diameter of a disc, in the initial torsion of the disc. CONSTITUTION:A pair of flanges 14 projecting outwardly in the direction of diameter are installed onto a hub 11, and a pair of side plates 15 and 16 having window holes 31 and 32 extending in the direction of circumference of a disc are arranged onto the both sides of the flange 14, and a pair of retainers 23 and 24 having a pair of retainer-side flanges 40 extending in the direction of diameter of the disc are arranged between a pair of side plate 15 and 16. A coil spring 30 extending in the direction of circumference of the disc is inserted between the above-described flange 40, window holes 31 and 32, and the flange 14. In the initial torsion of the disc, only the spring 30b having a low rigidity of the coil srping 30 is compressed by the projection 43 of the above-described flange 40.

Steering force controller for power steering system

Abstract: PURPOSE:To achieve sufficient steering response corresponding with the car speed by providing means for producing hydaulic pressure corresponding with the car speed in the reaction chamber and the rack guide pressurizing chamber. CONSTITUTION:Upon entering into high speed travel condition, smaller current is fed to a solenoid 65 when compared with that under low speed traveling, to displace a control spool 67 downward thus to increase the repellent force of spring 69. Consequently, the hydraulic pressure in a feed path 63 is set at high level. While main spool 59 will displace to the position corresponding with the pilot pressure thus to set the pressure in first feed path 57 at high level. Since high pressure in the path 63 is fed into the pressure chamber 36 and the rack pressurizing chamber 44, pushing forces of rack guide 41 and plunger 34 respectively against the rack shaft 14 and the projected section 30 will increase. Consequently, the torsion bar 25 is never twisted by small steering torque thus to increase the rigidity at the servo section.

Torsional vibration damper with clearance for the friction device

Abstract: The invention relates to a torsional vibration damper in which a friction device is connected to a torsion spring both via a return tongue and via a positive driving means with an idle path. By arrangement of the return tongue of a control plate in such a way that, upon reversal of movement, the friction device can be actuated out of the thrust region towards a central position, it is possible by relatively simple means to achieve effective frictional damping, and to achieve this in the range in which vibrations can occur when stopping the internal combustion engine. The drag connection for the friction device furthermore creates a range which manages without this friction, thereby facilitating idle-speed matching.

Manually operable fastener

Abstract: A manually operable quick action fastener, intended for both sporting and industrial use, consists essentially of a single length of wire which is formed into a closed triangular torsion spring having its torsion coils within the triangular shape and whose ends are formed, at the base of the triangle, into a closing hook and a locking arm. Other embodiments allow the closing hook to be strengthened by double winding or resin cladding, or both, and for higher load bearing models the wire winding of the basic triangular shape is modified to produce deflection limiting ends which allow the complete fastener to interlock and bear loads approaching the elastic limit of the material without slip of the parts.

Torque transducer with neutral point compensation

Abstract: A torque transducer with neutral point compensation has a measuring axle formed as a hollow member inside which a slender torsion spring is axially arranged to internally load the hollow member. With this device a constant torque load on the measuring axle can be set with such a direction and magnitude that the zero voltage output from the torque transducer represents zero external torque.

Torsion spring mounting structure

Abstract: A torsion bar assembly such as may be used to provide a counterbalancing force active on a part movable with respect to a second part is mounted on one of those parts by a structure which permits the torsion spring unit to be readily moved into position with its operative parts in desired rotational position relative to one another as well as to the parts with which they are to be used. The mounting structure is provided with a recess with inwardly projecting teeth and the torsion unit has externally projecting teeth. A part is substantially parallel to those teeth. A clip is designed to be a part of the assembly, hold the parts of the assembly in desired rotational relationship, and ensure that the assembly is mounted in proper rotational position.

Hand held exercise device

Abstract: A self-contained, hand held and operated exerciser for the hand, wrist, arm, shoulder, chest and back muscles is disclosed. A pair of spaced parallel handles having freely rotatable gripping pads are biased apart by main torsion springs anchored to the handles near their ends. The main torsion springs are restrained by substantially rigid keepers and allow lateral displacement of the handles toward and away from each other over a limited distance during use of the exerciser. Supplemental torsion springs increasing the ability of the exerciser to resist forces exerted on it are conveniently installed and removed without the necessity for fastener elements or the use of tools.

Electric power steering device

Abstract: PURPOSE:To allow a compact steering device of a small size to be employed by configurating a device in such a way that an electric motor is arranged in a dead space around an input and an output shaft which are connected by means of a torsion bar, simultaneously, the rotating force is transmitted to the other end of the output shaft through a power transmission mechanism. CONSTITUTION:An input shaft 2 connected to a steering handle is connected with a pinion shaft 3 connected to a steering wheel by means of a torsion bar 4 while they can be rotated relatively within the range of the specified angle. The arrangement of a reduction gear mechanism 11 is such that a large gear 12 is installed on the end of the pinion shaft 3 opposite to the input shaft 1 so as to allow the rotating force of an electric motor 10 to be transmitted through an intermediate and a small gear 13 and 14. A motor shaft 10a of the electric motor 10 is arranged in parallel with the shaft line of a steering shaft (2 and 3). This configuration allows the rotating force of the motor 10 to provide the pinion shaft 3 with an auxiliary steering force through the reduction gear mechanism 11 permitting steering to be effected through a rack 5.

Suspension and drive system for a mechanical RF energy power divider intended for spacecraft applications

Abstract: A suspension and drive system for a mechanical microwave power divider for spacecraft applications. The mechanical power divider includes a control which extends longitudinally therethrough. Torsion springs connect each end of the control rod to fixed surfaces and an electromagnetic control is coupled to the control rod to rotate it to a predetermined angular position. A selectively energizeable friction brake surrounds at least a portion of the control rod for holding it in a predetermined angular position.

Dual safe fuze with spring preloader

Abstract: The invention provides a novel dual safety fuze for a rocket-launched minelearing linear high explosive charge. The fuze comprises a tubular housing, having a forward section containing two booster charges for initiating the line charge, an intermediate section containing two electric delay detonators, a rotor containing two lead charges positioned between the forward and intermediate sections and a rearward section mounting two axial arming pins, which provide a first and second lock of the rotor in the safe position. A novel rotor spring assembly includes a rotatable shaft, whose one end is attached to a torsion spring for rotating the rotor and other end has a screw-like configuration, which is engaged by a fork-like driver mounted on the first arming pin. The torsion spring is not torqued when the rotor is in the safe position; but when the linear charge is deployed on the ground, the first firing pin is withdrawn from the rotor by the pull of the arresting cable, causing (1) the driver to rotate the screw/shaft and thereby preload the torsion spring and (2) the short across the two detonators to open and thus close the firing circuit. The operator then closes a firing control switch which (1) energizes the electrically piston-actuated second arming pin, thereby removing the second safety lock and releasing the rotor to rotate to the armed position, and (2) simultaneously energizes the delay detonators. On expiration of the delay period the detonators actuate and fire the line charge.

Printing head for dot printer

Abstract: PURPOSE:To make it possible to effectively perform connection, by providing not only through-holes for inserting a spring member to a holder and an armature but also solder holding holes reaching said through-holes and melting the solder material held to said holding holes to fix the spring member CONSTITUTION:Solder material holding holes 25a, 25b each having a width of about 065-075mm reaching through-holes 24a, 24b are formed to the bifurcated parts 23a, 23b of a torsion holder 20 and a similar holding hole 21c reaching a through-hole 26 is also formed to the opposed end part 21a of an armature 21 in the side of the torsion holder 20 The expanded diameter parts 22a-22c of a torsion spring 22 are engaged with and inserted in the through-holes 24a, 24b, 26 to be temporarily assembled and a rod shaped solder material is received and held in the respective holding holes 25a, 25b, 21c When the whole is set in a heating furnace in this state, the solder material is melted and effectively spread around the torsion spring 22 inserted in the through-holes to certainly perform connection