Abstract: A brake disc for vehicles is provided to reduce unsprung weight and improve thermal dissipation comprising a core of aluminum alloy clad with stainless steel sheets bonded on each side to form an integral disc.

Abstract: A speed responsive engaging mechanism, adapted for use in a hydrodynamic device to couple the turbine and impeller members, including an annular support secured to the turbine member having a series of cam surfaces formed in the periphery thereof with a series of engaging devices or friction shoes mounted on said ramps. The friction shoes engage with the impeller member at a predetermined speed of rotation of the turbine element. A series of springs engage each of the friction shoes to urge them toward a disengaged position.

Abstract: A friction coupling which utilizes a friction plate composed of high modulus asperities incorporated into a reboundably compressible elastomeric matrix for selective rotational engagement with a relatively noncompressible reaction plate between which is directed a flow of fluid with the asperities hydrodynamically wedging such fluid into a relatively thin load supporting film between the asperities and the reaction plate which film absorbs substantially all of the energy of engagement in the shearing effect of the fluid during relative rotation of the plates.

Abstract: The invention relates to fibrous friction material and to a process for the production of same. In accordance with the invention, said material comprises carbon fabric, a polymeric thermosetting binder, viz. polyoxyphenylmethanephenoxysiloxane of the formula[-Si {OC.sub.6 H.sub.4 (CH.sub.2 C.sub.6 H.sub.3 OH).sub.n CH.sub.2 C.sub.6 H.sub.4 OH}.sub.2 -].sub.m,wheren = 0-2;m = 10-100,As well as hexamethylenetetramine and barium sulfate, said components being taken in the following percentages by weight:Binder -- 20 to 40Hexamethylenetetramine -- 1 to 2.5Barium sulfate -- 15 to 30Carbon fabric -- the balance.The proposed process for the production of the fibrous friction material of this invention comprises impregnating carbon fabric with a solution of said polymeric binder in an organic solvent, said solution also comprising hexamethylenetetramine and barium sulfate. The impregnating solution contains said components in the following percentages by weight:Binder -- 29.7 to 30.7Hexamethylenetetramine -- 2.

Abstract: An improved process for preparing a friction particle results when a thermosettable resin is crosslinked in liquid suspension, producing a friction particle which is insoluble, infusible, has good friction stability and good braking fade resistance, and has a narrow particle size range. Also disclosed is a novel polyester friction particle prepared according to the above process or according to a conventional process.

Abstract: Noise from track retarders is significantly reduced by a brake shoe which dampens vibrations as continuous braking action of a wheel occurs. The brake shoe is adapted to have selectively variable brake surface configurations which contribute to reduced vibration. A special metal alloy, typically a flake-graphite bearing iron with vibration suppression characteristics lubricates the braking surface and lessens wheel oscillations during braking. The lubrication also contributes to uniform surface temperatures along the braking surface which lessens the tendency for the braking to fade. The brake shoe is basically a self-lubricated surface of variable contact area configuration.

Abstract: Resurfaced brake discs comprise a carbon disc and a wide tape of wear resistant material applied to the periphery of the disc, the tape being cut on one or both sides of the disc to allow the tape to be folded over the wearing surface of the disc. The tape is impregnated with a curable resin and heated under pressure to form a strongly adherent friction surface on the disc. Boron-containing or other additives may be added to the tape to improve friction qualities or to increase the oxidation resistance of the surface. Additional resin impregnations and heat treatments may be employed to strengthen the tape surface. The method is not limited to worn brake disc but may also be employed for resurfacing new brake discs as well.

Abstract: Carbon cloth sheaths impregnated with oxidation inhibiting materials are located between drive slots on the periphery of a carbon friction disc to prevent structural degradation of a band of continuous carbon fibers located in the disc through which a braking torque is uniformly distributed throughout the carbon friction disc during frictional engagement. A metal screen is mated to the carbon cloth by a resin binder. The metal screen carbon cloth sheaths or caps may be held on the disc periphery by locating pins to permit a resin binder bond to be established between each cap and associated arcuate segment of the periphery of the carbon friction disc. Anchor pins which hold a series of metal reinforcing plates in a fixed position with the drive slots extend through the walls of the reinforced carbon caps and the carbon friction disc to reduce the possibility of delamination between the reinforced carbon caps and the periphery.

Abstract: A low wear disk brake assembly has a rotatable body and a fixed axle rotatably supporting the body. A stack of disks having splined portions are aligned alternatingly relative to the axle in the body with each disk characterized by being made from graphite and/or carbon materials such that the disks have flexural strength of greater than 5000 psi and an average interlaminar spacing of crystalline and amorphous carbon of not more than 3.39 angstrom units at 15.degree.C.

Abstract: Friction compositions of glass fibers bonded with cured organic binders and containing a heat-conducting particulate metal and a binder modifying agent are disclosed. The compositions can optionally contain friction-modifying materials, an elastomer or particulate fillers. The compositions have particular utility as brake or clutch materials and are excellent for automotive application.

Abstract: A two piece brake disc includes an outer ring shaped member and an inner ring shaped member disposed concentrically within and joined to the outer member. One of the members comprises a structural member for mounting the disc with the other member comprising a wear member having one or more frictional surfaces and being replaceable because of the two piece construction. The members are essentially all-carbon composites which may differ chemically from one another such as through use of additives in the structural member to increase its oxidation resistance. The all-carbon composites may include carbon fibers with at least some of the fibers in the structural member being longer and circularly oriented to provide portions of the structural member with added strength.

Abstract: In a magnetic clutch a rotatable axially transferrable input disc which is part of a magnetic flux path including a magnetic cup in the output structure, engages annular friction surfaces on the output structure when magnetic flux is generated in the flux path by a coil. The friction surfaces are part of a rotatable coil and a magnetic cup attached to the driven shaft about which the input disc rotates freely in the absence of flux. The frictional torque generated by the engagement of the disc and the friction surfaces is proportional to the voltage applied to the flux-producing coil. When the input disc is locked, application of flux results in a braking action on the driven shaft.

Abstract: The invention resides in a carbonaceous aircraft brake disk having a reuseable lightweight carbon composite center core to which can be bonded lightweight composite wearing materials to each side. The wearing surface is particularly designed for wear loading applications, and is relatively thin thereby simplifying manufacturing and quality assurance steps. The center core is designed for long life and strength at relatively low cost. A carbon felt layer saturated with an adhesive is located between the center core and the lightweight side wear materials to form an integral disk upon pyrolizing of the adhesive.

Abstract: A disc-like brake or clutch component suitable for being carried in non-rotatable fashion by one of two relatively rotatable members of a brake or clutch and having relatively porous axially protruding spaced sectors for receiving abrasion carried between and integral with spaced spokes of a wheel-like relatively non-porous carrying member of much higher density than said sectors is prepared from a single powdered metal mixture, by placing two different thicknesses of metal powder in portions of a mold for powdered compressing powdered metal portions of greater thickness being joined by portions of lesser thickness and compressing the portions of lesser thickness with a pressure about 40 to 50 or more Tsi and compressing the portions of greater thickness with a lesser pressure of about 5 to 15 or 20 Tsi to produce a preform and then sintering said preform in a reducing or inert atmosphere under a moderate pressure of the order of 200 to 500 Psi and at a temperature of about 1,500.degree. to 1,900.degree. F.

Abstract: A friction member assembly for a brake or clutch in which a first flat frictional surface is made up of a sheet of pyrolized cloth and carbonaceous filter material laminated to other sheets of a braking member and an opposing second flat frictional surface is made up of the overlapping edges of laminated sheets of pyrolized cloth and carbonaceous filler material extending obliquely from the frictional surface providing improved operation in the wet and dry condition when the first and second frictional surfaces of the assembly are brought into frictional engagement.

Abstract: A centrifugal clutch comprises a clutch drum and a one piece rotor of resilient material. The rotor has a central hub portion and two like weight portions on diametrically opposite sides of the hub. The weight portions are connected to the hub by integral curved spring portions which are relatively long so as to have a relatively low spring constant. The spring portions are of selected varying widths along their length so as to provide substantially equal fiber stress throughout the length of the spring portions when they flex under the action of centrifugal force on the weight portions to bring them into engagement with the inner surface of the drum and are subjected to driving force transmitted through the spring portions from the hub to the weight portions and hence to the drum.

Abstract: A nonmetallic friction member is constructed of a bulk graphite component bonded to a resin impregnated carbon cloth component. The friction member is particularly useful for brake and clutch devices, especially multiple disc-type brakes for aircraft. The member may be in the form of a rotor or stator. If driving slots are provided, the member may be reinforced with resin impregnated carbon cloth at these slots.

Abstract: A carbon brake disc has its torque transmitting formations (keyways or keys) reinforced by filament reinforced carbon inserts which are preferably located, and may be bonded, in cut-out areas of the disc periphery. The formations are formed by a separate series of operations from those used to form the remainder of the friction members such as by application of a filimentary reinforcement of carbonized cloth, textile tape, random textile fibers or boron fibers.

Abstract: Molded articles of carbon or graphite suitable as heat absorbing or friction elements in brakes for jet aircraft are made by coating devolatilized carbon particles with a phenolic resin, especially boronated phenolic resin, reducing the volatile content of the coated carbon to below a critical value, mixing these with a resin coated or uncoated powdered abrasive, molding under critical pressures and temperatures, and then post-curing the resin and carbonizing and optionally graphitizing the product according to a schedule whereby delamination is avoided.