Abstract: A drive assembly for operatively rotating a web spreading roll of a paper mill or the like utilizes a toothed belt for transferring rotational motion from a motor-operated driving toothed pulley to a freewheeling or otherwise rotatably mounted driven toothed pulley. The driven pulley is, in turn, coupled to at least one of the plural rotary driven roll segments of and that are carried on the curved shaft of the web spreading roll. To minimize wear on the toothed belt, the driving and driven pulleys are fixedly mounted in positions of permanent alignment with one another, as by mounting both the drive motor and the driven pulley on the shaft bearings housing located at one end of the spreading roll shaft. A flexible coupling, as in the form of a rubber or otherwise suitably resilient bellows or the like, connects the driven pulley to the at least one roll segment for transferring rotation of the driven pulley to the roll segment so as to operatively rotate the web spreading roll.

Abstract: A lamination notching apparatus for forming dynamoelectric core laminations with winding slots includes a sprocket and drive belt system connecting an indexer to the drive table shaft of a lamination table. The indexer is driven from a punch drive and has an output sprocket. A coupling unit has a first sprocket and a second sprocket mounted on a common same shaft and connected by a passive clamp unit to produce a one-to-one rotation. Drive belts connect the indexer sprocket to the first sprocket and the second sprocket to the drive sprocket table shaft. The sprockets are formed with a special tooth profile to eliminate tooth-to-belt clearance and backlash with a standard HTD profile belt for precise rotary motion. The indexer is movably mounted for tension adjustment of the drive belt. The passive clamp unit includes telescoped tapered sprocket hubs on a tubular shaft, with a spring-loaded clamp nut and bolt passing therethrough.

Abstract: A transmitting chain for an automobile electric window includes an endless transmitting chain, a lower gear, an upper gear, two lower chain protectors, two upper chain protectors, two elastic tubes and an elongate cover. The lower chain protectors contain the lower gear having a leaf connector to combine with a rotating mechanism, which rotates the lower gear. The lower gear then moves the chain, which then rotates the upper gear. The upper gear then moves a lowering and lifting mechanism of the electric window of an automobile. The endless chain has its two intermediate portions contained in the elastic tubes and the elongate cover covers the tubes to hold them side by side.

Abstract: A rotary indexing table has a table defining a flat table surface. A dial having an upper surface and a lower surface is positioned over and generally parallel to the table surface. The dial further defines a circular inner edge and an outer edge. First bearings mounted to the table surface engage the inner edge of the dial to radially support the dial on the table. Second bearings axially support the lower surface on the table surface for rotation. The second bearings comprise circular grooves in the lower surface of the dial and concentric with the inner edge. Ball bearings are in the grooves and in contact with the flat table surface. A drive assembly comprising a belt engaging the outer edge and driven by a motor indexes the rotation of the dial.

Abstract: A power transmission belt having a body with a length, inside, and outside, and laterally spaced side surfaces. The body has a compression section, with there being a plurality of fibers embedded in the compression section having a diameter of 0.7 to 0.9 denier.

Abstract: A synchronous belt drive, with a high multiplication ratio for transforming a rotary movement into a translation or rotary movement, has at least two rows of teeth with different pitches interconnected by a toothed belt. The rows of teeth with different pitches engage wheels of at least one pair of wheels secured against independent rotation. The products of the number of teeth of the wheels and the pitch of the corresponding row of teeth differ at least slightly from each other. The pitch difference between the toothed belts gives the drive a high multiplication ratio. Very fine gradations and therefore high multiplication ratios may be achieved, even when the tooth modulus is high for reasons of resistance.

Abstract: An apparatus and method for manufacturing a synchronous drive belt or timing belt is disclosed. The method allows a belt with axially interlocked teeth to be manufactured. The method utilizes transfer molding, as opposed to compression molding, and involves an inflatable diaphragm which pushes rubber radially outwardly from a mandrel into a mold having teeth on an inner surface. The method includes the provision of a barrier layer which can be advantageously built into the belt to improve the transfer molding process.

Abstract: A synchronous drive belt/pulley combination wherein the lateral edges of the belt overhang the pulley.

Abstract: A flexible drive member for pushing and pulling an article includes a toothed belt section and ridge members which are arranged on the opposite surface of the toothed belt section along the length direction of the toothed belt section. The ridge members abut adjacent ones when the toothed belt section extends straight. The ridge members include respective hold portions which hold an elongated member, such as a hose and a wire. The abutment of adjacent ridge members enables transmission of pushing force. A fluid-operated device moving apparatus utilizes the flexible drive member which is arranged to have a T-shaped transverse cross-section corresponding to a T-shaped groove in which the flexible drive member can be guided. A fluid-operated device, such as a hydraulically operated clamping device, is coupled to one end of the flexible drive member.

Abstract: A transmission with a fixed transmission ratio comprises a pliable endless member which is provided with a profile of mainly transversely oriented teeth, and at least two pulleys which are each provided, on their circumferential surface, with recesses which mate with the teeth. The pliable member is a flexible belt which is stiff in its longitudinal direction and which may be made of metal, for example.

Abstract: A toothed belt construction formed mainly of thermoplastic material and method of making the same are provided, the method including the steps of disposing at least one layer of the thermoplastic material about the outer peripheral surface of a building drum that has the outer peripheral surface thereof defined by alternating teeth and grooves, and then forcing the one layer of thermoplastic material toward the drum while the temperature of the one layer of thermoplastic material is above its softening temperature and below its melting temperature so as to cause at least part of the one layer of thermoplastic material to exude into the grooves to form at least part of the plurality of teeth of the belt construction.

Abstract: A synchronous belt of the present invention has a tension member in the form of a cord, a plurality of teeth fixedly provided on one side of the tension member at set intervals in a longitudinal direction of the belt and a back layer bonded to the other side of the tension member. The back layer and the teeth are formed of urethane elastomer. The tension member is formed of inorganic fibers and is impregnated with a water based latex adhesive. A film of an epoxy adhesive is formed on the surface of the tension member.

Abstract: A toothed belt includes a tensile body embedded therewithin and the tooth surface thereof coated with a tooth sheet, wherein the tooth sheet is treated by RFL solution including inorganic pigments. The toothed belt, after treatment by RFL solution, forms an RFL solution impregnated layer at the tooth surface thereof. Resorcin and formaldehyde are compounded in the mole ratio of 1:1 to 1:3, while resorcin and formaldehyde are compounded with latex in the weight ratio of 1:5 to 1:15. Solid content of RFL solution is compounded with inorganic pigments in the weight ratio of 20:1 to 1:2. The inorganic pigment is selected from those other than black colored series.

Abstract: In an endothermic engine there are two dynamic balancing shafts driven in rotation in respectively opposite directions, at a speed twice that of the rate of rotation of the crankshaft. The dynamic balancing shafts are driven by a toothed belt transmission (1), comprising a driving pulley (2) keyed on the crankshaft, two driven pulleys (3, 4) keyed on the balancing shafts and a tensioning pulley (5) rotatably engaged with the base. The pulleys (2, 3, 4, 5) are connected together by a belt (6) having an internal (9) and external (10) toothing with a toothing pitch (P) equal to 7.5 mm, and provided with a resistant insert (7) formed by glass fibre cords (8) having a diameter equal to 0.9 mm.

Abstract: A power transmission belt having a body with an inside and an outside, a length, and a plurality of teeth on one of the inside and outside of the belt body and spaced in a likewise direction. A load carrying cord is embedded in the belt body and extends lengthwise thereof. The load carrying cord is made up of a first plurality of monofilament aramid fibers, each having a denier of 0.5 to 2.0 and bundled to define a combined diameter of 0.10 to 0.20 mm.

Abstract: A facing fabric covering tooth faces of tooth rubber layers of a belt body is treated with a rubber composition in which hydrogenated acrylonitrile-butadiene rubber is mixed with N,N'-m-phenylenedimaleimide.

Abstract: A toothed belt includes a rubber composition-molded cured material, a tensile body embedded therewithin, and a tooth sheet. The rubber composition-molded cured material includes 0.38 to 0.91 g of organic peroxide, based on --O--O-linkage amount, to 100 g of a polymer composition in which zinc polymethacrylate and hydrogenated nitrile rubber with hydrogenation rate of 90 to 95% are compounded in the weight ratio of from 4:96 to 20:80, 0.5 to 2.0 g of more than one higher organic acid esters, 0.5 to 2.0 g of maleimide compound, and 20 to 40 g of calcium carbonate.

Abstract: A height adjustable stand for laboratory equipment, in particular for rotary evaporators, possesses a holder arrangement (6). The holder arrangement is able to be displaced vertically on a stand post (5). By way of a motor driven lifting arrangement (9, 11), the holder device (6) can be vertically raised or lowered. A coupling (12) is provided between the holder arrangement (6) and the lifting arrangement (9, 11) for the powered connection and its release.

Abstract: In an endothermic engine there are two dynamic balancing shafts driven in rotation in respectively opposite directions, at a speed twice that of the rate of rotation of the crankshaft. The dynamic balancing shafts are driven by a toothed belt transmission (1), comprising a driving pulley (2) keyed on the crankshaft, two driven pulleys (3, 4) keyed on the balancing shafts and a tensioning pulley (5) rotatably engaged with the base. The pulleys (2, 3, 4, 5) are connected together by a belt (6) having an internal (9) and external (10) toothing with a toothing pitch (P) equal to 7.5 mm, and provided with a reinforcing structure (7) formed by glass fibre cords (8) having a diameter equal to 0.9 mm.

Abstract: A method of making tooth belts by formation thereof about the outer peripheral surface of a building drum having a generally cylindrical configuration and a surface defining a series of parallel, tooth-shaped grooves. The belts are formed by wrapping a fabric circumferentially around the building drum and winding a cord of tensile material helically about the fabric. A layer of thermoplastic material is formed about the cord of tensile material, and a cord of shrink material is wrapped helically about the layer of thermoplastic material. The shrink material has a higher softening temperature than the thermoplastic material and will shrink at a temperature below its softening temperature. Pressurized steam is applied to the shrink material at a temperature below its softening temperature and between the softening temperature and the melting temperature of the thermoplastic material.

Abstract: A power transmission belt having a belt body with a length, an inside, an outside, a backing layer, a plurality of longitudinally extending teeth, and a land surface between adjacent teeth facing in one of an inside and outside direction. At least one longitudinally extending cord is provided on the belt body. The distance between the land surface and the load carrying cord between the inside and outside of the belt is between 0.30 and 0.50 mm. The distance between the land surface and the center of the load carrying cord between the inside and outside of the belt is between 0.73 and 0.85 mm.

Abstract: A toothed belt (1) having a woven fabric (5) adhered to its meshing face, wherein the woven fabric (5) has longitudinal yarns (9) extending in the longitudinal direction of the toothed belt (1) and formed of covered yarns (15), each of which is prepared by turning a high tensile strength and heat resistance fiber yarn (17) on a core (16) made of an elastic yarn and by further turning a synthetic fiber yarn (18) on the high tensile strength and heat resistant fiber yarn. The high tensile strength and heat resistance fiber yarn (17) is restrained by the covering synthetic fiber yarn (18) so that it does not protrude in the form of large loops, thereby reducing the bulkiness of the woven fabric (5). As a result, the toothed belt is excellent in wear resistance and durability.

Abstract: The combination of an endless power transmission belt construction and a pulley therefor, the belt construction and methods of making the same are provided, the belt construction having opposed inner and outer surfaces with one surface defining a plurality of longitudinally disposed and alternately spaced apart like projections and grooves that are adapted to mesh with a ribbed surface of one pulley, and a planar surface adapted to operate on a planar surface of another pulley, wherein the planar surface of the belt construction comprises a polymeric material. The polymeric material of the planar surface provides a greater tractive force on the planar surface of the pulley. The planar surface further provides means to prevent abrasive particles accumulating thereon, thereby reducing wear upon the planar surface of the pulley.

Abstract: A power transmission belt having an endless body with a length and defining an elongate rib. The body has an inside, an outside, and laterally spaced sides. The rib has an exposed surface to engage with a cooperating pulley. At least a first portion of the exposed rib surface is formed by at least one of grinding and cutting. There is a second portion of the exposed surface that is neither cut nor ground during formation of the power transmission belt.

Abstract: An improved wear resistant toothed belt for enhancing the service life of such belt against chipping of the teeth of such belt such toothed belt having stretching members disposed at the center portion thereof, a tooth portion and a back portion, the tooth surface of the tooth portion being covered with a tooth cloth impregnated with an RFL solution and further impregnated with a rubber paste, the rubber paste containing carbon in an amount of 10 phr or less relative to polymer, the amount of solid content of the RFL solution stuck on the tooth cloth being in the range of 3 to 20 wt % relative to the weight of the tooth cloth, and the amount of the solid content of the rubber paste stuck on the tooth cloth is in the range of from 6 to 18 wt % relative to the weight of the tooth cloth.

Abstract: A drive mechanism including a toothed pulley and a device for retaining mesh between the teeth of the pulley and the teeth of a belt after assembly thereto. The retaining device includes a retaining member positioned adjacent a toothed section of the pulley defining a space therebetween enabling the belt to fit between the retaining member and the toothed section of the pulley when the teeth are in mesh, the space between an apex or crown of a pulley tooth and the surface of the retaining member opposite thereto being smaller than the maximum thickness of the toothed belt thereby ensuring a mesh between the teeth of the belt and pulley to provide a synchronized drive therebetween.

Abstract: There is provided a synchronous belt with excellent heat resistance and excellent abrasion resistance, in which a backing rubber is composed of a rubber composition obtained by vulcanizing hydrogenated nitrile rubber with an organic peroxide. At least the lowermost layer of a tooth rubber is composed of a hydrogenated nitrile rubber composition obtained through both sulfur vulcanization and peroxide vulcanization. The coating rubber on a facing fabric is composed of a rubber composition obtained through sulfur vulcanization. The above rubber composition of the tooth rubber is obtained by adding, to every 100 g of hydrogenated nitrile rubber, 0.3 to 10 g of sulfur-containing vulcanizing agent and 0.002 to 0.025 mol of organic peroxide.

Abstract: Anti-wear properties and tooth life in a toothed belt are improved by taking advantage of heat hardening of a treating agent used to treat the tooth cloth. The tooth cloth is treated with a resorcinol formaldehyde latex solution containing a mixture, at a weight ratio from 1:5 to 1:15, of a resorcinol formaldehyde solution containing resorcinol and formaldehyde at a molecular ratio from 1:1 to 1:3 and a latex solution containing carboxyl modified nitrile butadiene rubber and carboxyl modified hydrogenated nitrile rubber at a weight ratio from 4:6 to 1:9, and further containing carbon at a weight ratio of 1 to 10%. The solid content adhering onto the tooth cloth is from 5 to 30 weight %.

Abstract: A door drive including a belt transmission incorporating a corrugated transmission belt, consisting of a strip of plastic material and adapted to be passed around a corrugated or toothed drive wheel which entrains the transmission belt, having along its longitudinal extension transversely extending corrugations of approximately sinodial or tooth shaped configuration and is made of a plastic strip permanently deformed by embossing is described. The belt has a laterally projecting side strip at least at one side of the corrugated portion, especially approximately at midlevel between the wave crests and wave troughs, to accommodate longitudinal pull. In this manner a satisfactory compromise is achieved between low manufacturing cost, little noise, and the magnitude of the driving force which can be transmitted by a corrugated belt from locking the drive gear. Likewise presented are a belt transmission and a garage door equipped with a transmission belt of the proposed type.

Abstract: A method of making a plurality of toothed belt constructions and a set of such belt constructions are provided, the method including the steps of disposing tubular sleeves of stretchable fabric material respectively onto a plurality of toothed mold members having different diameters, forcing mold material against the outside surfaces of the sleeves to tend to stretch the fabric material into the grooves of the toothed mold members as the mold material enters the grooves of the mold members so that the resulting toothed belt constructions will have the fabric material thereof carried in certain positions relative to the respective teeth thereof, and forming the sleeves from the same fabric material and with the same diameters in the nonstretched condition thereof.

Abstract: A power transmission belt having a body with a length and inside and outside surfaces. A plurality of teeth are spaced lengthwise along the belt body and define at least a portion of one of the inside and outside surfaces of the belt body. A fabric layer with weft yarns is provided on the one of the inside and outside surfaces of the belt body. At least a portion of the weft yarns include a plurality of filaments of para-aramid fiber having a thickness of 0.3 to 1.2 denier.

Abstract: A noise-suppressed timing belt pulley and a method of making the same is disclosed. The pulley has a toothed face for engaging a toothed timing belt and a pair of flanges for guiding the belt. Air holes are formed in the flanges in positions aligned with the spaces between the teeth of the pulley. Air passages are formed in the rim of the pulley. A channel is formed in the valleys between adjacent teeth between and connecting the air passages. The combination of air holes in the flanges, air passages formed in the rim and the channels formed in the tooth valleys greatly reduces the noise generated by an operating timing belt transmission.

Abstract: A toothed belt and belt-adapted pulley system provides a high-load capacity and increased durability by reducing stress concentrations on dedendum portions and further preventing localized bending of belt tensile cords. Smooth engagement of elastic teeth of a belt is possible due to minimization of interference between the elastic teeth upon engagement or disengagement with a pulley. Reduced vibration, low noise, and a reduction in skipping under high loads result from the inventive system. Each tooth of the belt has a peripheral length m.sub.0 and a dedendum portion with a length m.sub.1, where m.sub.1 /m.sub.0 is 0.1 or less. Each tooth of the pulley has a peripheral length n.sub.0 and a dedendum portion having a length n.sub.1, where n.sub.1 /n.sub.0 is 0.1 or less.

Abstract: A toothed belt construction formed mainly of thermoplastic material and method of making the same are provided, the method including the steps of disposing at least one layer of the thermoplastic material about the outer peripheral surface of a building drum that has the outer peripheral surface thereof defined by alternating teeth and grooves, and then forcing the one layer of thermoplastic material toward the drum while the temperature of the one layer of thermoplastic material is above its softening temperature and below its melting temperature so as to cause at least part of the one layer of thermoplastic material to exude into the grooves to form at least part of the plurality of teeth of the belt construction.

Abstract: A rubber composition includes hydrogenated acrylonitrile-butadiene rubber (HNBR), a copper dithiocarbamate salt compound and sulfur. The use of the copper dithiocarbamate salt compound results in the vulcanized rubber composition exhibiting improved heat resistance as compared to a rubber material that does not include the copper dithiocarbamate salt compound. Toothed belts and V-ribbed belts can be made using the rubber composition to produce belts exhibiting improved heat resistance.

Abstract: A multi-ribbed power transmission belt having transverse grooves in the compression section which are oriented other than perpendicular to the longitudinal direction of the belt such that any transverse grooves in immediately adjacent longitudinal ribs are offset from each other in the longitudinal direction by a distance of from 10% to 50% of the longitudinal spacing of the grooves.

Abstract: A toothed rubber belt has teeth, a rubber back and a core wire imbedded in the rubber back. The core wire has lower twists of about 10.5 to about 13.5 times/10 cm and an upper twist of about 6.5 to about 9.5 times/10 cm. Preferably, the wire core is made of glass having a construction of ECG 150 3/6 to 3/13. The core wire having the specified number of twists improves the physical properties of the belt.

Abstract: A toothed belt with a plurality of teeth along one surface of the belt which surface includes a peripheral wear-resistant fabric that is double woven with two sets of warp yarns and two sets of weft yarns that are tied together in a single layer.

Abstract: A toothed transmission belt adaptable for use with drive transmission having a series of teeth, where the curve of each tooth is based on Schiele's Anti-Friction Formula which describes a tractrix curve.

Abstract: A synchronous drive belt for use in low speed and high torque applications has a zero pressure angle over a relatively greater portion of the fore and aft flank surfaces of the belt teeth. A pulley is also described which is particularly suitable for use in combination with the belt.

Abstract: A toothed belt has cores coated with a resorcin-formalin-latex liquid that includes as the latex component at least about 60 wt % of a hydrogenated acrylonitrile-butadiene rubber or a chlorosulfonated polyethylene rubber. The teeth can be covered with a tooth covering fabric that is made from yarns containing at least 50 volume percent of aramid fibers.

Abstract: The combination of an endless power transmission belt construction and pulley therefor, the belt construction and methods of making the same are provided, the belt construction having an inner surface defining a plurality of longitudinally disposed and alternately spaced apart like longitudinal projections and longitudinal grooves that are adapted to mesh with a ribbed surface of a pulley, the inner surface of the belt construction being cogged and defining a plurality of transversely disposed and alternately spaced apart transverse projections and transverse grooves, the transverse grooves each having a depth that is approximately one-half of the depth of the longitudinal grooves and that is approximately one-fourth of the thickness of the belt construction.

Abstract: A power transmission belt having a belt body with an inside surface and an outside surface, with the belt body having a compression section and a tension section, spaced outside of the compression section. At least a first part of the tension section is defined by a chlorosulfonated polyethylene rubber composition having a chlorine content of 15 to 30% by weight. At least a second part of the compression section is defined by a rubber composition that is different than the rubber composition of the first part.

Abstract: An endless power transmission belt has an elastomeric body portion, load carrying members embedded in the body portion, and a power transmitting surface integral with the body portion. The elastomeric body portion further includes material to mitigate unstable frictional behavior of the body portion responsible for initiating self-excited vibration at the power-transmitting surface.

Abstract: The combination of an endless power transmission belt construction and a pulley therefor, the belt construction and methods of making the same are provided, the belt construction having opposed inner and outer surfaces with each surface defining a plurality of longitudinally disposed and alternately spaced apart like projections and grooves that are adapted to mesh with a ribbed surface of a pulley, the depth of the grooves of each of the surfaces of the belt construction being substantially less than the approximately 2.4 mm depth of the grooves of a similar belt construction that is adapted to have one of the opposed surfaces thereof mesh with the ribbed surface of the pulley in the same manner as the first mentioned belt construction.

Abstract: A differential hoist and drive includes a differential escapement mechanism arranged mechanically between and in combination with a pair of direction turning members, such as pulleys. An endless loop of a flexible force transmitting element (cable, chain, strap, or the like) interconnects the direction turning members and the differential escapement. The load can be connected to either the differential escapement or the direction turning members with the other being anchored as a fixed member. The load is restrained from swinging or from other unintended movement. A turnbuckle or other suitable device provides for a desired pretensioning of the loop of flexible force transmitting element.

Abstract: A rubber article having a fiber reinforcement embedded therein. The reinforcement comprises a cylindrically braided cord of an even number of twisted yarns of four or more, an equal number having an twist, i.e. twisted to the right, and a Z-twist, i.e. twisted to the left. The angle difference between a first twisting angle of a yarn and a final twisting angle of the cylindrically braided cord is set at less than 10.degree..

Abstract: The combination of an endless power transmission belt construction and a pulley therefor, the belt construction and methods of making the same are provided, the belt construction having opposed inner and outer surfaces with one surface defining a plurality of longitudinally disposed and alternately spaced apart like projections and grooves that are adapted to mesh with a ribbed surface of one pulley, and a planar surface adapted to operate on a planar surface of another pulley, wherein the planar surface of the belt construction comprises a polymeric material. The polymeric material of the planar surface provides a greater tractive force on the planar surface of the pulley. The planar surface further provides means to prevent abrasive particles accumulating thereon, thereby reducing wear upon the planar surface of the pulley.

Abstract: A rubber having a fiber reinforcement embedded thereon. The reinforcement comprises a cylindrically braided cords by more than four and even numbered yarns and a center cord provided in a hollow part of it. The twist multiplier K is set lesser than 350, the twist multiplier K being expressed ##EQU1## where T is a number of twists per 10 cm and D is a total denier.

Abstract: A power transmission toothed belt drive having a belt tooth power transmission surface defined by an arc having a radius centered on a point approximately one-half the belt tooth pitch from the centerline of the tooth. The pulley groove has a sidewall surface which confronts the power transmission surface of the belt tooth centered on the same point when the belt tooth is fully meshed with the pulley groove in the operation of the drive. A relatively small clearance with the pulley is provided adjacent the belt tooth root and a relatively large clearance is provided between the pulley groove inner surface and the tip surface of the belt tooth. In one form of the invention, both the power transmission surface and tip surface of the belt tooth are defined by a single radius and the confronting pulley groove sidewall surface and inner surface confronting the belt tooth power transmission surface and tip surface have a constant clearance therewith and are defined by continuous circular arcs.