Abstract: A spring damper device includes cylindrical outer coil springs and inner springs inserted in the outer coil springs, respectively. The cylindrical outer coil springs are held in the form of arcs of a circle at angular intervals therebetween by a retainer plate, whereas the inner springs have a length shorter than the outer coil springs so that the inner springs are actuated a predetermined angle later compared with their corresponding outer coil springs. Each of the inner springs has a diameter smaller at opposite end portions thereof than at a central portion thereof.

Abstract: A torsion damper is of the kind in which the springs bear against thrust inserts or spring seats. The anterior part of each spring seat has a circular perimeter, the diameter of which is smaller than the internal diameter of the outermost spring of the associated group of springs, while the posterior part of the spring seat includes a barrel element which projects from the back of the anterior part of the spring seat. This barrel element also extends radially beyond the perimeter of the anterior part, at each end of the barrel element, so that the outermost spring of the associated group bears on the projecting portions of the barrel element in end thrust engagement.

Abstract: A torsion damping device, in particular for inclusion in a clutch friction wheel of a motor vehicle clutch, includes springs which are in end thrust engagement on thrust inserts or spring seats which are mounted for pivoting movement in the friction wheel. The anterior part of each of these spring seats, on which the springs are in end thrust and/or centring engagement, is made at least partly of synthetic material, while the posterior part of the spring seat, by which the latter is pivotally mounted in the friction wheel, is made at least partly of metal.

Abstract: A roller comprises: a support shaft bearing at either opposite end a bush supporting an external tubular element containing the shaft and destined to be a support element of a cover fixed thereto by one end; a motor to recall the roller by setting the tubular element in rotation about the shaft in an opposite direction to that followed during an unwinding of the cover, and constituted by at least two helix springs, separate but cooperating, which are coaxially keyed on the shaft; the ends of each spring being stably fixed on corresponding seats exhibited by a first support keyed on the shaft and a second support, axially fixed and rotatably mounted on the shaft, and solid to the tubular element.

Abstract: A helical spring device used for amusement or for stress relief having a plurality of concentrically positioned helical coil springs each extending between two endpieces. The helical coil springs each are highly flexible with a low spring stiffness to mass ratio, and each have a different diameter. The endpieces have an internal member and an external member, with the internal piece having a slit extending through it. The ends of the helical coil springs are inserted through the slits in the internal members in such a manner that they are positioned between the internal and external members. The ends are secured in place by a fastener such as a screw which extends between the internal and external members.

Abstract: A flexible spindle suitable for transmitting a torque as well as an axial thrust is constituted by a plurality of helical spirals of wire all of the same length. Each spiral has opposite winding directions to the winding direction of the adjacent spirals and the outer diameter of each spiral is equal to the inner diameter of the spiral which surrounds it. The terminal ends of the spirals are assembled integrally with each other and with the terminal ends of a flexible member situated inside the innermost spiral. Each sprial has a length which is equal to that of the other spirals as measured along their axis when these are in their bent operating position and under those conditions under which they are designed to transmit torque and thrust, with the flexible spindle resulting not to be radially or longitudinally deformable when under stress, thus transmitting the forces without loss.

Abstract: A resilient support device for installation on seat or wheel fork supports of light vehicles, such as bicycles or motorcycles, for the comfort of the rider. The invention achieves arbitrary and discretionary adjustment of support stiffness with a high degree of variability to accommodate riders over a wide range of weight and road conditions from mild to rough. Novel mechanical configurations are disclosed for ease of adjustment over the range of operation.

Abstract: This invention relates to a high ampere-rated circuit breaker which meets the electrical code requirements of the world market. The operating springs controlling the CLOSED state of the circuit breaker contacts are contained within a module unit which can be installed both in the field as well as in the factory. A separate module provides the spring bias forces required for each of the circuit breaker ampere ratings.

Abstract: The invention is a nested spring assembly. The assembly comprises a first spring and a second spring, and both the first and second springs have an inner and outer surface. The second spring is nested within a cavity formed by the first spring, and the second spring is releasably secured to the first spring by a longitudinal strip of adhesive contacting both the outer surface of the second spring and the inner surface of the first spring.

Abstract: A shock mitigating tether system includes a helical coil spring mounted within a tubular housing between opposing retention plates. A first cable is folded in half and journaled through the longitudinal axis of the spring such that a loop end projects from a first end of the spring and a pair of opposing ends of the cable are mounted to the tension plate on the second end of the spring. A second cable is also journaled longitudinally through the spring with a second cable loop projecting outwardly through an opening in the second plate and the second cable free ends mounted to the first plate, such that the cable loops project in opposing directions along the longitudinal axis of the coil spring. A pair of pins are mounted through diametric apertures in the ends of the housing outwardly of the plates, to retain the spring and plates within the housing.

Abstract: This invention is a device for holding a flexible fine mesh fluid filter 30 in a container 12 while a fluid, such as paint, is being drawn from the container by spraying equipment 8. More specifically, the invention comprises a ring of flexible material 20 and a purality, preferably two, of elongate flexible members 18, ends of which are secured to the flexible ring, with their intermediate parts depending from the said ring, and secured together where they cross at their intermediate depending portions, and together with the flexible ring, forming a pocket over which a fine mesh fabric fluid filter is to be positioned and held. When so assembled in use the suction pipe of the spraying equipment with its filter is received within the pocket and held in the container to filter the paint, or other fluids as it is drawn from the container. In the best and preferred form of the invention, all of the parts above mentioned are in the form of coil springs, but it should not be considered so limited thereto.

Abstract: A helical torsion spring is provided having an adjustable spring rate. The torsion spring includes a main spring formed from a coil of wire having a first end and a second end. The wire extends away from the first end to form a first arm and away from the second end to form a second arm. The main spring is loaded torsionally by angular displacement of the first arm with respect to the second arm about a central axis passing through a geometric center of the coil. An inside diameter of the coil defines a core. An adjustment spring is oriented within the core. The adjustment spring is formed from adjustment spring wire configured in a manner similar to that of the main spring. The adjustment spring exhibits an exterior diameter not less than the inside diameter of the main spring. The adjustment spring is rotatable to threadably adjust a proportion of the core of the main spring that includes the adjustment spring therein.

Abstract: An apparatus and method for stabilizing a gantry. Powerful springs in the apparatus allow small deviations from a perpendicular configuration of a boom and beam arrangement. The springs resist larger deviations, thereby increasing the structural integrity and safety of the apparatus and method. The method stabilizes the gantry by providing a progressively increasing restoring force as the boom and beam travel farther from a starting position corresponding to a perpendicular relationship between the boom and the beam.

Abstract: A constant tensioning device in the form of an elastic member interposed in the handbrake chain between a railway car handwheel and a handbrake lever of the railway car brake apparatus for maintaining tension in the handbrake chain in accordance with the applied handbrake force, irrespective of such shifting of the railway car relative to its truck, as would otherwise cause slack to develop in the handbrake chain and thereby cause an undesired loss of handbrake force.

Abstract: A catheter guide wire which, despite its reduced diameter, exhibits improved strength and resistance to corrosion by body fluids and medicines. The catheter guide wire 10 is composed of a stainless steel core wire 11, a winding of a low carbon duplex structure steel wire 13 having a diameter smaller than 30 .mu.m and a tensile strength higher than 300 kgf/mm.sup.2, said winding covering the core wire such that tiers of the low carbon duplex structure steel wire run obliquely to the axis of the core wire 11 and have turns crossing each other, and a polyester resin film 15, thinner than 3 .mu.m, covering the low carbon duplex structure steel wire 13. The catheter is composed of a resin inner tube and a low carbon duplex structure steel wire 13 covered with a polyester resin film 15, which runs around the resin inner tube obliquely to the axis and crosses each other.

Abstract: A shock absorbing device is disclosed, allowing reducing the vehicle weight at least by half. The device includes a tubular housing (TH) and within it a resilient shock dampening assembly (SDS) elastically axially movable is secured, through one or more inter coiled preliminary extended tension coil springs 6 and (6a). (SDS) also is locked to (TH) by a locking ring (8), in order to preserve said preliminary extension. (SDS) includes a plurality of telescopic sections, (UTS), (ITS2), (ITS1), and (LTS), resiliently supported by a plurality of compression coil springs (1), (2), and (3), interposed between them, designed to absorb average shocks. When the greater shock forces after entirely compressing the springs reach their predetermined unlocking level, rather than bottoming, ring (8) is opened, allowing the (SDS) to extend axially upward, opposed by springs (6) and (6a).

Abstract: A suspension system for isolating a platform from external vibrations includes spring assemblies suspending the platform. In each spring assembly an elongated outer coil spring is suspended at an upper end thereof from a support structure. A tube is disposed loosely within the outer spring and is attached to a lower end of the spring so as to extend upwardly. An elongated inner coil spring is disposed loosely within the tube and is suspended from an upper point of the tube. The inner spring has a lower end attached to the platform. For friction dampening, o-rings are fitted on the inner spring in sliding contact with the tube.

Abstract: A window noise attenuation device that keeps window balance springs from ratting against the inside of the spring covers when the balance spring is caused to vibrate. The apparatus is designed to be slipped over the window balance spring during the construction of the window. The device can be installed either by hand or by machine. The apparatus features a positioning section that keeps the device substantially fixed in position on the balance spring during use. An offset section holds the balance spring fimly in position away from the walls of the spring cover and jamb liners when the balance spring is caused to vibrate by rapidly closing or opening the window or from other jarring such as slamming a door. The low cost device is designed to last as long as the window spring mechanism.

Abstract: An improved spring balancer (10) includes a shaft (13) rotatably mounted on a support (11). A first torsional spring (14) acts between the support and the shaft. A second torsional spring (19) acts between the support and a cable drum assembly (63) journalled on the shaft. A third spring (23) acts between the support and another cable drum assembly (26). A fourth cable drum (28) is fixed to the shaft. Four cables (141,142,143,144) are associated with the various cable drums (140,63,26,28) and are connected to a roll-up door (12). When the door is lowered, the various springs will absorb energy. When the door is raised, the various springs will give up energy.

Abstract: A hollow lumen cable is formed by helically winding inner and outer coils with the helices of each coil being in an abutting relationship and the outer coil inner peripheral diameter being less than the outer peripheral diameter of the inner coil. Preferably, each coil is multifilar. After the coils are wound, an unwinding force is applied to the outer coil and the inner coil is inserted into the outer coil to have its winding inclined opposite to that of the outer coil; and thence, the outer coil is allowed to contract to form an interference fit with the inner coil. The cable may be incorporated as part of a medical apparatus. For example, the cable distal end is connected to an implantable pump or other rotatable medical apparatus and the proximal end to a powered prime mover.

Abstract: A hoist or skip conveyance for high speed hoisting operation within a vertical mine shaft is provided with sets of modules of guide rollers which engage sectional guide beams or girders extending the length of the shafts to steady the passage of the conveyance up and down the shaft. Each modular guide roller set for the system incorporates three guide rollers mounted for ready access on the outside of the respective guide module, to facilitate repair or replacement thereof. The load absorbing components for each guide roller comprise an air bag, permitting specific pre-loading of the roller, and an elastomeric high rate bumper spring to accommodate impact loads, while providing rebound capability and associated hysteresis damping, for smooth, chatter free operation of the system. The system may be specifically set up to counter the significant torquing effect of the hoisting cable.

Abstract: A screen printing machine including a head and at least one screen frame holding arm pivotally mounted on the head for movement about an axis toward and away from a platen between lowered printing and raised non-printing positions, respectively, is provided which includes primary springs associated with the screen frame holding arm, the primary springs attached at one end to first attachment locations on the arm and at another end to second attachment locations on the head for controlling the movement of the arm. Secondary springs for adjusting the spring rate of the primary springs are also provided, the secondary springs in one embodiment extending between the same first and second attachment locations.

Abstract: A torque transmitter includes three coaxial helically wound springs of different inner and outer diameters positioned relative to each other such that the inner and outer generally circumferential surface of the center spring form interference fits with, respectively, the outer generally circumferential surface of the inner spring and the inner generally circumferential surface of the outer spring. The inner and outer springs are wrapped in one direction and the center spring is wrapped in the opposite direction.

Abstract: The disclosure teaches a sprung contact pin for testing testpieces, in particular electrical printed circuit boards, including a casing, a coil spring disposed therein, a portion of a testing tip which projects axially out of the casing and which is movable against the force of the coil spring, and at least one further storage means associated with the coil spring.

Abstract: In a tensioner, a friction brake locks the advancement of a tension rod by a friction force provided and a tension rod advances from a casing by the pressurizing of the compression spring to maintain a belt, chain or the like in a suitable tension state. A coil portion is outwardly inserted through the tension rod in a closely contacted state and one end of the coil portion is latched to the casing, while another end forms a friction brake which is an operation end to cause an enlargement or the shrinkage of the diameter of the coil portion, by which the advancement and the removal of the tension rod is performed.

Abstract: A shock absorber for use in connection with moored barge fleets, and capable of withstanding very large shock loads so that when positioned between a mooring cable and a stationary shore connection the shock absorber absorbs impact loads that are applied to the mooring cable by virtue of the flow of the current and the passage of other vessels. The shock absorber includes a cylindrical outer shell, the shell including end closure plates at each end. Extending between the end closure plates are six guide rods, each guide rod carrying four aligned groups of two concentric helical compression springs, the respective groups of springs being separated from axially adjacent groups of springs by respective alignment plates that are freely movable relative to the guide rods.

Abstract: A Stirling refrigerator has a cold-finger in which a displacer can reciprocate in accordance with changes in pressure inside the cold-finger which are produced by a compressor. A spring is connected between the displacer and the cold-finger in order to brake gradually the movement of the displacer at the ends of its stroke. The spring has a greater spring constant when it is deformed by the displacer being near either end of its stroke than when the spring is in, or near, a neutral position.

Abstract: Annular coil spring apparatus is provided which includes a first annular spring with a plurality of coils canted along a centerline with a trailing portion of each coil and a leading portion of each coil defined by a back angle and front angle, respectively. Coils are interconnected in order to form a garter-type coil spring and a second annular spring is provided and disposed within the first annular spring. The second annular spring may include a plurality of coils canted along a centerline thereof and the first and second annular spring may be canted in either the same direction or opposite directions in order to provide different force-deflection characteristics of the annular coil spring apparatus.

Abstract: The invention relates to a spring device capable of softly dissipating the energy of an accelerated mass which is relatively great with respect to the inert mass of a reference system coupled to said spring device. The force deflection curve of said spring device exhibits an abrupt steep rise within the linear working range of the force deflection curve so that the required deflection is reduced. The spring device can include a soft suspension spring coupled to a control spring.

Abstract: A helical spring composed of a plurality of parallel, coiled strands of spring wire with such strands being unconnected along most of their length but being joined together at least at one end of the spring. In a preferred embodiment, such strands or wires are welded together at opposite ends of the spring. Such a spring is formed by incrementally advancing a plurality of wires in contiguous, parallel relation towards a wire-coiling station and then, at the termination of a coiling step, interrupting such advancement to sever the wires through, or immediately adjacent to, a first welded zone while at the same time welding such wires together in a second zone spaced a precise distance from the point of the severing operation.

Abstract: An extensible suspension arm for damping the vibrations of the tub of a laundry washing and drying machine comprises a tension spring whose ends are connected to two suspension members, a damping member, and at least one stop providing a degree of freedom between the damping member and the suspension member to ensure that the damping action does not occur beyond a specific amplitude of the displacement between the two suspension members, damping being necessary only at high amplitudes during passage of the natural frequencies of the laundry washing machine.

Abstract: The draft gear includes a single center friction plate and a pair of spaced apart friction wedges. Six major friction surfaces are defined, four of which are engaged upon contact with the follower, the other two being engaged after about one-half inch of travel. Three major groups of angles are defined, a first being between the friction wedges and the shoes, a second between the friction wedges and the release wedge and a third between the shoes and the spring seat. These groups of angles cooperate to insure that the draft gear will release upon removal of external force.

Abstract: A first coiled spring has its two ends coupled together to form an annular coiled spring. The two ends of the first coiled spring are coupled together by a second coiled spring located within the first coiled spring. One end of the second coiled spring is connected to one end of the first coiled spring and the other end of the second coiled spring is connected to the other end of the first coiled spring. A loop is formed at each end of the first coiled spring. The ends of the second spring are connected to the two loops of the first coiled spring respectively, and the loops are offset from each other such that one loop fits into one end of the first coiled spring and the other loop fits into the other end of the first coiled spring.

Abstract: The invention relates to an apparatus for lifting equipment for interposing in the force flow path between the lifting equipment or the driving mechanism thereof and a load to be moved, with e.g. a transducer for detecting the load states. In known lifting equipment, it has been found that critical load states are admittedly detected, but are not adequately compensated or cannot be counteracted soon enough. For this purpose, the invention provides at least one mechanism for intermediately storing or at least partly converting the mechanical energy introduced by a load movement into other energy forms, the transducer being coupled in non-positive manner to the mechanism.

Abstract: An improved lever mechanism interlocked with a pedal in a sewing machine driving device, which lever mechanism includes a rod positioned on one side portion of a lever so as to act on the lever when the latter is pivoted in one direction from a neutral position, and first and second springs of different diameters disposed concentrically with the above rod so as to urge the rod in the direction opposite to the pivoting direction of the lever.

Abstract: A spring system for providing an elastic force between two machine parts, including concentric compression and tension springs disposed in parallel within a housing, with one pair of corresponding ends of the springs being connected by a movable coupling piece, and the other pair of corresponding ends being connected to a stationary stop and a connecting element, whereby a movable stop permits variation of the effective point of connection between the compression spring and machine part connected therewith.

Abstract: The present invention relates to an improved inherently effectively damped coiled spring construction including a first coiled spring having a pair of ends, and a second coiled spring having a pair of ends, the second coiled spring being in the form of at least one tubular spring, the body of which is disposed about the body of the first coiled spring in operable contact therewith to provide the desired friction therebetween and whose ends are not contiguous with the ends of the first coiled spring and are free of contact with the weight imposed on the first spring and the support of the first spring so that when the first spring is dynamically compressed or expanded, relative twisting movement of the springs is made possible immediately following yielding of static friction force along their contacts, whereby the second spring disengages from the further twisting movement of the temporarily deformed coils of the first spring, thereby creating an effective friction generating and energy dissipating device for

Abstract: A throttle return spring assembly having inner and outer torsion springs contained between end housings is preassembled and then mounted as a unit about a throttle body shaft.

Abstract: An internal type, spring damper for use in an internal combustion engine or the like having a cylinder head with a poppet valve supported for movement between valve open and valve closed positions and with a coiled valve return spring loosely encircling the stem of the valve and operatively associated at one end with the valve and having its bottom end operatively in abutment with the cylinder head whereby to normally bias the poppet valve to the closed position, has at least its corresponding bottom end of reduced external diameter for a predetermined axial extent whereby to eliminate damper-to-spring contact for up to at least 11/2 coils of the valve spring at its bottom end.

Abstract: A polymeric type joint packing having a garter spring circumferentially oriented near one packing end where the garter spring has a helical core diameter that is greater than a radial gap to be sealed by the packing.

Abstract: The invention provides a guiding arrangement for a skip, cage, lift or the like wherein guide rollers on opposed sides of the skip are urged against guides which flank the skip, each by way of first and second biasing springs. The first biasing spring has a lower load resisting capacity than the second biasing spring and upon a predetermined deflection of the first biasing spring the second biasing spring is brought into action to resist further deflection.

Abstract: A fuel injection nozzle is proposed having a valve needle which opens in the direction of fuel flow and a throttle point controlled in accordance with the stroke of the valve needle which is loaded by at least two closing springs, in order to obtain a distinct pressure jump with respect to the required opening pressure when the throttle point is rendered ineffective. As a result, the throttle point is fully effective during idling and at relatively low partial loads and is only rendered ineffective when the supply of fuel is relatively great.

Abstract: One or more of the springs supporting the bolster of a railway car truck is a two stage spring group comprising an outer coil and an inner coil disposed within and coaxial with the outer spring. A retainer is provided to hold the inner spring in relation to the outer spring. The retainer has helically arranged lugs or a flange in engagement with the outer coil at the lower end, and the retainer also includes a support surface for supporting the lower end of the inner coil.

Abstract: The present invention encompasses a novel spring construction and a method of application of the spring in the field of orthodontics. A tension spring member is at least partially surrounded by a tension releasable component of larger diameter. The tension spring will normally be a coil spring adapted to be placed under tension between two points. The tension releasable component will normally comprise either a closed coil spring or an open coil spring. In either case, the tension releasable portion comprises an integral extension of the tension spring member and is designed to deform in response to a predetermined force thereby releasing the device from its tension exerting position. The orthodontic method of the invention comprises anchoring one end of the novel tensioning device to a tooth to be moved and the other end to an anchor point. The device is then placed under tension and the tension releasable means is used to hold one end of the device.

Abstract: An arrangement for resilient absorption of forces, particularly for an intermediate buffer coupling of rail vehicles, comprises an elongated housing having open and closed ends, a friction element located in the region of the open end of the housing, a resilient element cooperating in series with the friction element and formed as a friction spring including a plurality of inner conical rings and a plurality of outer conical rings cooperating with one another with interposition of lubricant, outer and inner cup-shaped casing members located in the housing and closeably accommodating the friction spring. The outer cup-shaped member forms a support for one end of the friction spring, whereas the inner cup-shaped member forms a support for the other end of the friction spring.

Abstract: A friction spring unit has a friction spring including a plurality of inner rings and outer rings whose conical surfaces cooperate with each other with interposition of a lubricant, and an outer casing element and an inner casing element which shield the friction spring from outside and inside, respectively. The rings of the friction spring which are located at axial ends of the latter are sealingly connected with the inner casing element and the outer casing element. This sealing connection may be performed by interengaging beads and grooves, or flange-like projections and supports. The casing elements may be formed as hoses or each may be composed of at least two telescopable sleeves.

Abstract: A spring-applied, electrically released drum brake which is self-energizing in one direction, and partially deenergizing in the other direction. Regardless of braking direction, the brake shoes are applied with substantially zero force, with the braking force being increased to decelerate and stop the drum within predetermined jerk and deceleration constraints.

Abstract: An intra-oral orthodontic spring appliance is provided which consists of a metallic coil spring having an enlarged tension releasable means at one end which engages fixed spring mounting means in the mouth and a tail at the other end which engages suitable means on a tooth to be repositioned. Preferably, the enlarged tension releasable means is an open coil spring formed over a portion of a closed coil spring. When the closed coil spring is passed through a fixed spring mounting means, e.g., a buccal tube, and attached to a tooth to be repositioned, the retractive force is provided by compression of the open coil spring and expansion of the closed coil spring.

Abstract: A dual rate spring device particularly adapted for use in a suspension system of a railroad car truck includes a vertically mounted light duty spring means positioned, for example, between a side frame of the truck and a load carrying bolster of the truck to support the bolster when in a lightly loaded condition. Positioned around the light duty spring means is a shorter heavy duty spring which with the light duty spring supports the bolster when in a heavily loaded condition. To insure that the device functions properly under varying load conditions, a lower end of each spring is connected by a spring retainer.

Abstract: A safety device for use with a speed change gear system for a bicycle which comprises a casing mountable in position to a bicycle frame, a hollow shell member disposed within the casing, a resilient member including at least one first coil spring of large diameter and a second coil spring of a smaller diameter disposed within the shell member in axial alignment and partial overlapping relation with each other. Further, at least three axial spaced slide members are disposed within the shell member so as to be cooperative with the resilient member. A tubular sheath extends in curved position and is connected at one end to a rear derailleur and at the other end to one of the slide members, and a gearshift wire passes through the safety device and the tubular sheath.