Abstract: A chain saw sharpening tool having a channel section which fits over a saw chain and cutter bar and has a file holder guide secured thereto for engaging a file holder and orienting it with respect to the saw chain during filing of the saw chain teeth for sharpening.

Abstract: An opener for both pop-top cans and bottles is formed to include an elongated lever body. A lifting element is positioned on the lever body and is sized and shaped to fit underneath the lift tab on a pop-top can. A fulcrum element is further formed on the lever body in physical association with the lift element but spaced away from the lift element so as to form a channel between the lift element and the fulcrum element. The channel is sized and shaped such that the lift tab of the pop-top can can be sheaved in the channel between the lift element and the fulcrum element for manipulation of the lift tab to open the pop-top can. The opener further includes a bottle cap edge gripper located on the lever body in physical association with the fulcrum element. For removing bottle caps from capped bottles, the bottle cap edge gripper is independently formed and then positioned on the opener such that it engages the edge of the bottle cap when the fulcrum element is positioned in the center of the bottle cap.

Abstract: A hand held light bulb removing device with means for illuminating the working area. The device includes an elongated handle, a frusto-conical member detachably secured to the handle, illuminating means embedded in the handle, and switching means to engage the illuminating means. The frusto-conical member accepts the light bulb of an overhead light fixture and provides the resistance necessary to rotate the light bulb. The illuminating means located in the end of the handle provides the illumination necessary to locate the light fixture in a darkened room.

Abstract: Conventionally, air brake cam clearance is difficult to check due to inaccessibility and the force necessary to rotate the cam to check for the required clearance. The present device engages around the end of the cam lever both front and back and gives sufficient leverage to rotate the cam without any danger of slippage occurring. A wrench is formed on the opposite end of the tool and may be used for adjusting the clearance if necessary.

Abstract: An adjustable wrench socket of the screw adjustment type in which two identical jaws facing each other have a multiple non-slip grip on nut and screw heads and in which the jaw movements are synchronized in respect to the axis of their mutual housing that slidably engages them but controls them in all other unwanted directions and further provides for adaptability to commercial drives and their extensions.

Abstract: A striking tool device formed of a cylindrical metal shaft having, at one end, a square bore for mating with the drive tang of a ratchet wrench and, at the other end, a square shank for mating with a socket, and an arm member attached to said cylindrical metal shaft extending substantially at right angles thereto. The arm member has an anvil-like end portion of slightly larger diameter. The end portion has two flat striking surfaces on opposite sides for allowing striking by a hammer. Such striking creates a sufficient shock impulse to loosen a "frozen" nut or bolt.

Abstract: Apparatus and a method are presented for determining the torque load applied to a fastening element by a fluid powered wrench, and displaying a digital readout of the torque. The operating pressure of the wrench, after compensation for the temperature of the pressure transducer, is converted to a torque measurement by a programmed microprocessor and the torque value is displayed on a digital readout. The system is useable with and adjusts for wrenches of several sizes by an input selector switch connected to the microprocessor. Apparatus and method are also presented for automatic cycling of a ratcheting hydraulic powered wrench and automatic termination of the tightening process when a predetermined torque has been delivered to the fastening element.

Abstract: The present invention includes a radial force detection mechanism for detecting a radial force generated by cutting operation of a cutting tool by use of an ultrasonic vibrator, a depth-of-cut feed mechanism for moving the cutting tool in the depth-of-cut direction, and a vertical feed mechanism for controlling the vertical position of the cutting tool, combined with correction of its movement in the depth-of-cut direction by the depth-of-cut feed mechanism, so as to bring it to the position where a radial force detection signal detected by the radial force detection mechanism becomes zero. By moving the cutting tool in the vertical direction by use of the vertical feed mechanism so that the radial force detection signal may become zero, no radial force is applied to the cutting tool.

Abstract: A multiple bandmill (10) for sawing a log (L) moving past that multiple bandmill. This multiple bandmill includes two pairs of bandmills (20, 22 and 24, 26) located at a common longitudinal position with respect to a log being cut. The bandmills comprising the multiple bandmill are slanted with respect to vertical in the longitudinal direction. The bandsaw blades (50, 52 and 54, 56) of each pair of bandmills within the multiple bandmill cross each other in a X-pattern in the log cutting region (30). One bandmill (20, 26) of each pair is located within the area defined by the other bandmill (22, 24). All four sawlines (12, 14, 16, 18) are made at the same time at a single longitudinal location on the log.

Abstract: A core slabbing machine for the removal of paper wound on a mill roll core, to thereby permit reuse of the core. The machine includes a horizontal core-receiving mandrel and a carraige which moves horizontally back and forth above, and aligned with, the mandrel. The carriage carries a freely rotatable cutting wheel which is forced downwardly by a pneumatic cylinder onto the paper to be removed from a core. Each horizontal pass of the rotary cutting wheel cuts through a number of layers of paper determined by the force on the cutting wheel. This action is automatically controlled and continues until the cutting wheel reaches the core surface exterior after a number of cutting passes. The freely rotatable cutting wheel exerts a force on the core and paper substantially at right angles to the core and its supporting mandrel, thus obviating the need to anchor the core relative to the mandrel.

Abstract: An electronic musical instrument having automatic bass chord accompaniment performance in which bass tones are generated in different manners depending on the state of the keyboards of the device. Chord and bass notes are selected using lower and pedal keyboards, respectively. The chord type and root note are identified from the depressed keys of the keyboards. The bass tone is generated with consideration of whether the identified root note coincides with the selected bass note. In the situation where the root note coincides with the bass note, a bass tone is generated based on a stored predetermined bass pattern corresponding to the particular chord type and root note identified. In the situation where the root note does not coincide with the bass note, or if a chord type has not been identified, a bass tone is generated based on the depressed bass note key.

Abstract: A system for selecting accompaniment patterns in accordance with which accompaniment musical tones are produced in an electronic musical instrument. The system includes a memory for storing a plurality of accompaniment patterns. A plurality of storage devices corresponding respectively to a plurality of operable members is provided. A select device is operable to select one of the accompaniment patterns to produce pattern identification data indicative of the selected accompaniment pattern. A writing device is responsive to an operation of any one of the operable members for writing the pattern identification data into one of the storage devices corresponding to the operated one operable member, thereby assigning the selected accompaniment pattern to the one operable member. A reading device is responsive to an operation of the one operable member for reading from the memory the selected accompaniment pattern.

Abstract: A stringed instrument which in one embodiment has a sounding board or box to which stretched strings are attached and which has a tremolo apparatus with a lever arm extending from a housing, the lever arm connected to one or more strings of the instrument, the lever arm movably secured to a shaft movably mounted in an interior opening in a wall in the housing, the shaft biased by a spring or springs and having stop means thereon so that, upon either extension or compression of the spring or springs when the lever arm is moved, the shaft returns to substantially the same position it maintained prior to spring movement so that the pre-tremolo tension and pitch of the string or strings attached to the lever arm is substantially the same post-tremolo. A tremolo apparatus as described above.

Abstract: A pyrothechnic actuated structural release device which is mechanically two fault tolerant for release. The device comprises a fastener plate 11 and fastener body 12 each attachable to one of a pair of structures to be joined. The fastener plate 11 and the fastener body 12 are fastenable by a dual swivel toggle member 13. The toggle member is supported at one end on the fastener plate and mounted for universal pivotal movement thereon. Its other end is received in a central opening in the fastener body 12, and has a universally mounted retainer ring member 38. The toggle member 13 is restrained by three retractable latching pins symmetrically disposed in equiangular spacing about the axis of the toggle member 13 and positionable in latching engagement with the retainer ring member on the toggle member. Each pin is retractable by a pyrotechnic charge, the expanding gases of which are applied to a pressure receiving face on the latch pins to effect retraction from the ring member.

Abstract: A muzzle switch connected to the rails of an electromagnetic launcher to divert post-launch rail current into a dump resistor or other load and to prevent arcing at the muzzle. The switch includes shorting members electrically connected to the launcher rails together with a flexible washer-like ring which surrounds the rails and is in close proximity to the shorting members. Part of the rail current is diverted through the ring and when a current carrying armature which propels a payload along the rails passes the switch the interaction of the magnetic field produced by the rail current and current in the ring forces the ring against the shorting members, thus closing the switch as the armature leaves the rails.

Abstract: Breechblock with firing pin for mortars, which has barrel (1), breechblock (2), and base plate (3) united as follows:(a) barrel (1) to breechblock (2), using at least one key (8) accomodated in key seat (11) of barrel (1) and provided with holes (81) into which pins (8) are inserted; and at least one screw (7) accomodated in a threaded hole (21) of breechblock (2), said screw (7) defining two coaxial zones in its body, one of greater diameter of external treading (71) which is attached in breechblock (2), and another of smaller diameter provided with perimetral neck (72) in which pins (9) positioning key (8) are accomodated;(b) breechblock (2) to base plate (3) with possibility of turning in space, using positioning head (26) in the end of breechblock (2); support flange (4) over platform base (3); cover rib (5) attached by screw (20) over support flange (4) and which holds rib (6) in it, into which said head (26) of breechblock (2) runs.

Abstract: An ammunition bunker for the main battletank turrets which is arranged behind the tank turret and whose walls are designed by predetermined break lines such that, in the event of an explosion of ammunition in the bunker, its outside walls are hurled off the sides of the tank thereby protecting the crew of the tank.

Abstract: A hydraulic control circuit and method of operating a blowout preventer having a two-way hydraulic piston and cylinder assembly including an open and close port. An adjustable hydraulic supply is connected to a control valve which is in turn connected to the open and close ports. A pressure booster having an input and an output is connected to the close port and a control circuit is connected to the input of the booster and to the close port for actuating the booster and also blocking flow from the control valve to the closed port when the hydraulic supply increases to a predetermined value.

Abstract: A vacuum operated actuator has a spring biased diaphragm that is exposed on one side to atmosphere and on the other side to a vacuum chamber. An output means is connected to move with the diaphragm and carries a valve means which together with a tube a manually controlled tube operates to connect the vacuum chamber with either atmosphere or with a vacuum source so that the diaphragm and thereby the output moves with the movement and in the direction of the tube so as to provide an output force so as to move the output with a force substantially greater than the input force applied to the tube.

Abstract: A hydraulic pump/motor in which working piston elements are arranged for radial reciprocation. A cam is arranged eccentrically to a rotor which carries the pistons. Fluid cavities are provided in feet on the pistons, in the faces of a polygon to which the feet are attacahed, and in bearing pads in the outer ends of the cylinders to provide hydrostatic balancing. The pistons are hollow and are equipped with check valves to prevent centrifugal force from expelling fluid from the polygon and foot cavities. The cam includes mating spherical surfaces which compensate for bending forces applied to the cam. An improved mechanism for adjusting the cam position uses inherent forces to eliminate the need for a power assist device for cam adjustment. Port plates on opposite sides of the rotor provide inlet to the unit near the axis of the unit and outlet near the outer edge to alleviate stresses and increase efficiency.

Abstract: A one moving part, bi-directional rotary displacement mechanism for conveying rotational movement about an axis to movable members in flight vehicles. In consists of an enclosure having bi-directional rotation capability, encapsulating a vane with bi-directional ducts venting from its load bearing surfaces. The vane is affixed to a bi-directionally ducted shaft, having bi-direcitonal rotation capability, extending through the center and outside of the enclosure. A conically shaped, sealed, positive stop, with load bearing surfaces, eminating from the inside radius of the housing, points toward the horizontal axis, supports the shaft and facilitates axial rotation. The vane has a radius concentric with the inside radius of the enclosure and allows sealed bi-directional rotary movement between the two surfaces. Two sealed cavities exist between the load bearing surfaces of the vane and the positive stop. Pressure to and from the cavities flows through the joined vane and shaft ducting.

Abstract: A diaphragm for pumps or the like of a dish-shaped body of nonreinforced thermoplastic elastomer having a curvilinear flexure sidewall portion of substantially less thickness than the central and flange portions to which it connects.

Abstract: A narrow vent for aerating windshields of tractors, work machines, etc. The vent has a plurality of fins that spread the air stream that is directed onto a window in a fan-like manner. A portion of the fins, as side fins, are directed onto a region adjacent the vent, and the other portion of the fins, as main fins, are directed onto a region just ahead of the vent, with the angle provided by the fins corresponding approximately to a quarter circle. The air-exit plane provided by the vent extends at most insignificantly beyond the vehicle body part in which the vent is installed. All of the fins are partially recessed in the vent. The side fins are longer, and the outermost side fin is considerably longer, than the main fins.

Abstract: A ventilating plate unit comprises a plate member having ventilating holes formed therein, which is adapted to be fitted to an opening formed by partially opening the window glass of the vehicle.

Abstract: A combination mug and tea bag holder wherein the tea bag holder is an integral part of the mug, to thereby provide a convenient location to store a used tea bag, either for subsequent reuse on a second or subsequent refill or for easy discarding after the user is finished drinking the tea. A transverse receptacle is formed into the upper portion of a mug, which slot opens up into the mug. A tea bag which has been dipped into hot water may be slid by the string attached to the tea bag from the hot water into the transverse receptacle where it can rest until it needs to be subsequently reused or eventually discarded.

Abstract: A raw meat processor for injecting a pickle into masses of raw meat and cutting the fibers of the raw meat. The raw meat processor includes a pickle injection needle assembly comprising a number of pickle injection needles. A raw meat feed conveyor extends horizontally for intermittently feeding the masses of raw meat from its one end to the other end through a working station therebetween. The injection needle assembly is installed above the working station of the feed conveyor. The injection needles extend vertically. The injection needles each includes an elongated cylindrical hollow body for directing the pickle and a tip secured to the lower end of the hollow body, the tip of each of the injection needles having a cutting edge.

Abstract: A method of cooling pieces of meat comprises the step of injecting a cooled gaseous medium into the pieces of meat at a plurality of injection sites. The meat curing machine is provided with a system for injecting a cooled gaseous medium through the injection needles thereof into individual pieces of meat in order to cool the meat pieces.

Abstract: A printwheel detent disengaging mechanism enables low-torque high-speed automatic printwheel setting. In the engaged position spring-loaded ball in a rotatable shaft bears on a detent ball disposed in a bore in a sleeve surrounding the shaft to cam the detent ball into detent vees of the printwheel. When the shaft is rotated so that the spring-laded ball no longer bears on the detent ball, the detent force is removed and low torque printwheel setting may be accomplished. When setting is completed, the shaft is rotated back into position where the spring-loaded ball bears on the detent ball.

Abstract: A system for the continuous and automatic supply of a mixture of ink and dampening fluid to a lithographic press. The ink and dampening fluid are mixed and then pumped to the press fountain. The fluid mixture is sampled downstream from the mixing location and a signal is sent to control feed of ink and dampening fluid to the mixing location to ensure that the desired ratio of ink to water is maintained.

Abstract: Intaglio printing cylinder, comprising a core of a virtually undeformable material and a multilayer sleeve joined releasably thereto. The new intaglio printing cylinder especially is more durable than prior cylinders of a similar type, and it is interchangeable with conventional solid metal intaglio printing cylinders. The new intaglio printing cylinder is characterized by the fact that on the outside of the first, inner layer of the sleeve a plurality of ribs projecting outwardly and running substantially in the longitudinal direction of the cylinder are disposed. This intaglio printing cylinder has an improved stability, especially against circumferential shifting or displacement within the sleeve and thus is more durable. An additional improvement of its working characteristics is achieved by a continuous electrical continuity from the core to the outer copper layer. The new intaglio printing cylinder is especially suitable as a substitute for the solid metal printing cylinders still in use.

Abstract: In a rotary multicolor printing press for printing on a continuous web and comprising a plurality of printing units, each of which includes a plate cylinder driven by way of a main drive mechanism common to all of the printing units, there is disposed between the plate cylinder of each printing unit and the main drive mechanism, an adjustable parallel crank coupling which has no play in the direction of rotation thereof. The adjustable parallel crank coupling adjusts to various positionings of the plate cylinder to account for changing plate cylinder diameter and couples the variably positioned plate cylinders with a fixedly positioned first drive train connected with the main drive mechanism. Each printing unit further includes a separate impression cylinder driven from a shaft supporting the plate cylinder and coupled with the adjustable parallel crank coupling.

Abstract: A printing machine for printing a continuous slip includes an angularly-movable lifter shaft disposed below a path of feed of the printing sheet, and a lifter fixedly mounted on the lifter shaft for angular movement therewith toward and away from the underside of the printing sheet. An urging device normally urges the lifter away from the printing sheet. A first tension applying device is operatively connected to the lifter shaft and is operable to angularly move the lifter shaft together with the lifter against the bias of the urging device so as to bring the lifter into engagement with the underside of the printing sheet to apply tension to the printing sheet when impression and blanket cylinders are spaced from each other, thereby preventing a slack developing on the printing sheet.

Abstract: A resilient sheet gripper for a sheet-fed rotary printing press having a gripper shaft to which is secured a pivoting clamping member in resilient relationship with a pivotable gripper finger having a fulcrum and adjsutable biasing, is provided including a base member mounted loosely around the gripper shaft, a joint on the base member for pivotally securing the finger to the base member, a plurality of compression springs disposed on opposite sides of the gripper shaft with associated stops for adjustably pressing the gripper finger and the base member against the clamping member, and another stop which acts against the cylinder upon closure of the gripper finger thereby moving the fulcrum of the gripper finger from the gripper shaft to the joint so as to change the gripper finger lever transmission which then increases the retaining force.

Abstract: For use with a printing apparatus that has a plurality of printing rollers, at least one ink fountain, and at least one inking blade that is positioned adjacent to one of the inking rollers, the inking blade having a plurality of adjusting keys thereon, an ink control system connected to the inking blade for controlling the adjustment the adjusting keys. The ink control system comprises a system unit for controlling the overall operation of the ink control system, an operator console for inputting commands which control the adjustment of the adjusting keys, a servo power unit for controlling the adjustment of the adjusting keys, and a plurality of servo modules each of which performs the adjustment of one of the adjusting keys by actuating the one adjusting key.

Abstract: A flexible printing plate clamping assembly utilizes a circumferentially slidable support bar that has support edges which receive a leading edge of a printing plate. A camshaft is placed within a slot in the support bar such that rotation of the camshaft causes circumferential movement of the bar. Spring biased projections, carried on rotatable pipe shafts receive the trailing edge of the printing plate.

Abstract: A propellant-charge pack has an annular envelope having an outer wall extending along and centered on an axis, a pair of axially spaced end walls extending transversely inward from the axis and having inner peripheries centered on the axis, and an inner wall defining a clear axially throughgoing passage between the inner peripheries of the end walls. The envelope is generally axially symmetrical about the axis, that is it is formed as a body of revolution or of regular polygonal section, and is substantially symmetrical to a plane perpendicular to the axis midway between the end walls. A relatively easily ignited primar charge forms a part of the inner wall symmetrical of the plane and a propellant charge fills the envelope between the walls outward of the inner wall. The primar charge is of such high combustibility, compared to the diameter of the passage, that the entire primar charge, even of a stack of such packs, will be ignited before they burn through and set off the respective propellant charges.

Abstract: The method of breaking rock by blasting comprises drilling of boreholes, loading of a blasting charge with a means of initiation therein and stemming. The stemming is made up of a phlegmatized low-velocity explosive.

Abstract: An industrial shotshell has a load, such as an iron slug, assembled with a press-fitted, wad column-containing outer cup and housed with the cup in its shell. The outer cup encloses a wad column and, when pressed fitted onto a larger diameter rearward portion of the slug, seals the gases and supports the wad column during slug setback. A concavity formed in the interior of the base end of the outer cup provides empty space into which the wad column can compress during slug setback. The outer cup holds the wad column to the slug and remains attached thereto during flight, adding a degree of drag stabilization for improved accuracy of the slug and helping to stabilize the slug by changing its center of gravity. An obturating cup is formed integral at the rearward exterior of the base end of the outer cup.

Abstract: The present invention is directed to small-arm shot ammunition having a propelling charge and an explosive charge. Separate igniters are provided for each of the charges. An ignition means is coupled to a trigger unit for operating the propelling charge igniter and the explosive charge igniter with different time intervals. The intervals are automatically selected as a function of range between the small-arm and the target. In this way, the disintegration of the ammunition ocurs as close to the target as possible.

Abstract: An auto conveyor is disclosed of type in which chain driven pusher rollers engage a vehicle tire running along a track, while guide rollers support the pusher rollers above the guide track. A low profile, guide-pusher roller assembly is provided configured to avoid contact of the tire with the guide roller in which the pusher rollers are constituted by large diameter sleeves are rotated on a stationary sleeve, and smaller diameter guide rollers are mounted on either end of an axle shaft passing within the diameter of the sleeve. The guide roller perimeters protrude below the perimeter of the pusher rollers to support each pusher roller above the guide track.

Abstract: An aerial tramway (21) having an endless loop haul rope (41,42,43,44) supported for movement between end terminals (27,36) and preferably for movement over at least one intermediate support tower (75) with the haul rope oriented in a substantially vertical plane. The haul rope (41,42,43,44) has an upper rope portion (57) moving in one direction and a lower rope portion (56) moving in an opposite direction, and at least one carrier unit (46) is coupled for movement by a grip assembly (55) to the upper or lower rope portion. The carrier unit (46) further includes a sheave assembly (66) positioned to be in rolling engagement with the rope portion that is not gripped. In the preferred form, the grip assembly (55) grips the upper rope portion (57) while the sheave assembly (66) rollingly engages the lower rope portion (56).

Abstract: A railway car comprises a center sill with a crossbearer, webs and end bolsters extending across thereof. A light side stiffener interconnects the projecting ends of said webs and spans between the bolster and the crossbearer. A shear plate covers a trapezoidal end frame extending from the bolster. The frame includes inclined braces buttressing a pair of cantilevered brackets projecting toward and horizontally overlapping similar brackets of the adjacent car.

Abstract: A work table assembly that is mountable on a vehicle and that is used for supporting a flat panel or the like thereon during work operations on the panel at an installation site, the work table assembly including a frame construction that is mountable on the vehicle and spaced outwardly therefrom, the table member being mounted for pivotal movement on the frame construction and being pivotally movable relative thereto from an upper vertically disposed transport position to a lower horizontal work position, at which work position a panel is received in supporting relation for a work operation thereon.

Abstract: A pallet includes a symmetrical structure of two pallet sections, which enable the pallet to assume an erected or collapsed position without disassembly. When the pallet sections are attached to form a symmetrical pallet structure, the pallet structure is collapsible into a V-shaped configuration.

Abstract: A folding workbench (20) comprises a top portion comprised of two parallel spaced boards (12 and 14) with an adjustable work holder (17) mountable along each board. One corner of the top has a vernier vise (16) attached thereto; the vise can grip work itself and can cooperate with the adjustable work holder for wide work or a fixed stop 80 at an adjacent corner for gripping very long work. The vise is mounted on a swivel plate (101) which has a quadrant shape and is surrounded by a groove (100) cut in the top of the bench to give unrestricted pathway to the vise's locking plate. The top is supported by two pair of legs (38 and 40), one pair at each end of the top. Each pair is hingedly attached (45) to the underside of the top, with one pair being hingedly attached at a lower position (spaced from the top) by the use of a spacer block (32) so that the legs can be folded against the top in a compact arrangement.

Abstract: A method for economically separating organic contaminants such as volatile organic chemicals (VOC's) and polychlorinated biphenyls (PCB's), even if the contaminants are present at low concentrations, from inert materials such as soils or sludges, comprising subjecting inert materials contaminated with organic compounds to a temperature effective to volatilize the organic contaminants but below incineration temperature, with continuous removal and condensation of evolved vapors, for a period of time sufficient to effect the desired degree of separation of contaminants.

Abstract: Enhanced combustion of pulverized fuel in an oxy-fuel burner (10) is achieved by replacing the conventional pulverized fuel feed with a dense phase material flow transport system. This enables materials which would hitherto have been discarded as waste to be used as a viable energy source. In addition to greatly enhancing combustion the swirlers conventionally associated with the oxy-fuel burner (10) may be omitted.

Abstract: A fluidized bed reactor (1) comprising a reactor chamber (4) having a gas distributor plate (5) for feeding primary air, and space above said distributor plate (5) is divided into compartments (6) by means of partition walls (7) having discharge openings (9) for feeding secondary air to the circulating bed.

Abstract: A high temperature furnace curved nose construction having refractories suspended from a support structure wherein a combination of radial filler refractories and rectangular filler refractories are supported by rectangular hanger refractories. Each radial filler refractory is supported by radially adjacent rectangular filler and/or rectangular hanger refractories. Each radial filler refractory has opposed converging tread sides while each rectangular filler refractory and rectangular hanger refractory have four tread sides. The tread sides of a radial filler refractory mates with the tread sides of a rectangular filler refractory or a rectangular hanger refractory. Any combination of at least one rectangular hanger refractory, at least one rectangular filler refractory and at least one radial filler refractories mate by their tread sides to form at least a section of the curved nose construction.

Abstract: A yarn feed mechanism for a multiple needle tufting machine in which a plurality of yarn feed stub rolls are mounted on transversely spaced supports on the machine in such a manner that the stub rolls project in opposite directions from opposite sides of each support and have free ends which are spaced apart from the free ends of adjacent feed rolls to facilitate threading and unthreading the feed rolls. Each yarn feed support carries a plurality of first and second vertically spaced feed rolls on opposite sides of the support and each pair of coaxially aligned feed rolls are driven from a corresponding drive shaft adapted to be driven selectively at a high speed or a low speed.