Abstract: A needle bar bushing having a lubricant seal for reducing excess lubricant on the needle bar of a sewing machine. The lubricant seal includes a plurality of vertically aligned scraping portions including at least two similarily disposed conical scraping edges situated over a portion of the length of the needle bar bushing. The conical scraping edges being arranged in surrounding engagement with the needle bar for stripping and leading excess lubricant from the peripheral surface of the needle bar thus reducing the danger of lubricant working its way through the bushing and being thrown onto the work being sewn as a result of needle bar reciprocation.

Abstract: The present invention relates to a device for monitoring fluid flow through a pressurized lubrication system. The device includes a reciprocally arranged indicator that is responsive to fluid pressures within the lubrication system for exteriorally indicating the lubricant flow as a function of the reciprocal position of the indicator.

Abstract: The present invention relates to a material dispensing apparatus having a unique closed loop servo system for advancing material to a receiving machine in accordance with the use demands thereof.

Abstract: A sewing machine presser foot having a labyrinth like passageway for freely guiding a cord to the sewing area of the machine in a manner preventing the self unthreading of the cord.

Abstract: A mining installation includes a self-advancing roof support unit with which is associated a forward base part which is independent of the floor-engaging member of the unit. The forward base part is connectible to the floor-engaging member and movable relative thereto. An elevated track is carried on the forward base part and in use supports a mining machine which can travel reciprocally therealong.

Abstract: A device for monitoring the passage of workpiece ends through a sewing machine. The device includes a photosensitive apparatus adapted to produce a signal in response to the passage of the workpiece ends past the end of a fiber optic light source.

Abstract: A sewing machine having a scissor-like cutting device for severing a continuous strip of tape or the like immediately subsequent to its exit from beneath the presser foot assembly of the machine. The operation of the cutting device is influenced by a control system which includes a fiber optic light source for detecting the passage of work through the sewing area of the machine.

Abstract: A thread trimming mechanism which includes a fixed blade arranged adjacent the stitch forming area of the sewing machine and a resiliently biased movable blade adapted to cooperate in a scissor-like action with the fixed blade. The movable blade is mounted such that varying degrees of contact pressure may occur between the blades during the thread trimming cycle of the mechanism.

Abstract: The present invention relates to an improved thread control mechanism for chain-stitch sewing machines. The present invention is adapted to apply a quick and effective clamping action to the sewing thread of the machine in timed relation with the rotary or oscillatory movements of the stitch forming instrumentalities. The mechanism's clamping force magnitude may be selectively regulated to exceed the tensile strength of the particular thread being used and is effective to break the thread should it become wound about an operable rotary shaft of the machine. The present invention includes a rotary actuating member for moving a thread engaging member between two extreme positions so as to entrap and intermittently clamp the thread at a location interposed between the stitch forming instrumentalities and the thread supply source.

Abstract: This invention relates to a feed mechanism for a blindstitch sewing machine including a stitch shortening and tacking mechanism. Elliptical feeding movement is imparted to the feed dog by a fulcrumed lever driven off an eccentric on the main shaft of the machine. An operator controlled eccentric actuator is operatively connected to mechanism which changes the fulcrumed position of the feed lever to vary the elliptical path of the feed dog whereby effecting the advancement of the workpiece during the sewing operation without effecting needle reciprocation. An auxiliary thread tensioning assembly is provided to control the amount of thread utilized during the stitch tacking operation.

Abstract: This invention relates to a stacker mechanism for removing flexible work pieces from the working area of a machine. The stacker mechanism of the present invention includes a frame, an arm, and a support member having first and second pivotal connections. The first pivotal connection serves to rotatably secure the support member to the frame and allows the arm carried thereby to be vertically rotated. The second pivotal connection allows pivotal movement of the arm in a horizontal direction. The end of the arm opposite the second pivotal connection carries a wiper mechanism for engaging and moving the work piece. A driver is employed for pivotally moving the arm. A motion retarding assembly is provided at the second pivotal connection for applying frictional restraint to the horizontal turning movement of the arm whereby a higher coefficient of friction is maintained at the second pivotal connection relative the first pivotal connection.

Abstract: A cylinder bed machine provided with a thread cutting device having a retractable and laterally movable assemblage which includes a thread seizing member, a knife and a thread clamp. Upon actuation the assemblage cooperatively moves forwardly and laterally to a predetermined distance from the stitching area whereat the knife and thread clamp are held. The thread seizing member continues forward movement to a position for seizing the threads situated about the looper. Upon return, the seizing member carries the threads to the knife and thread clamp position whereat they are cut and clamped. Once the threads are cut and clamped the assemblage is returned to its initial position. An adjustable guide directs the seizing member through the thread loops formed about the looper.

Abstract: A method and apparatus for automatically and continually feeding workpieces, one after another, to a sewing machine. The continuous feeding is imparted to the workpiece by a plurality of connecting links which connect the trailing edge of one workpiece with the leading edge of the following workpiece at a point in front of the sewing instrumentalities. The workpiece that is being fed into and through the machine automatically draws the succeeding workpiece towards and through the machine due to the connecting link fastening these two together. Motion is imparted to the connecting links by the feed device associated with the sewing machine. The connecting links are guided through a predetermined path by a rail system which automatically returns the connecting link to a staging area after same has been released from the workpiece. A sewing machine fastens together the continguous ends of the workpieces and a cutter cuts the chain formed therebetween.

Abstract: A thread chain cutting mechanism for a sewing machine which includes a swingable blade which is actuated by means independent from the mechanical workings of the machine. The actuating mechanism includes a cantilevered resiliently urged member which carries at its free end the swingable cutter blade. A pneumatically operated plunger oscillates said resilient member and thus the blade carried thereby between a cutting position and a non-cutting position at a frequency which is adjustable. Means for providing a section in the cutting area so as to draw the thread chain into the path of the blades.

Abstract: A sewing machine provided with a fan which is formed as an integral part of the handwheel and drive pulley and serves the purpose of drawing air there through for cooling. A shroud and a baffle cooperate to direct the air drawn in by the fan downward and over the bottom cover of the sewing machine which is provided with heat dissipating fins.

Abstract: a sewing machine apparatus for aligning one side of a series of fabric panels in a predetermined position. The apparatus includes measuring devices which associate with and continually monitor the position of one side of the fabric panels with respect to each other. A control means, responsive to the output of the measuring means, selectively advances or retards the top feeding mechanism engaging with the top layer or fabric or the bottom feed mechanism engageable with the bottom layer of fabric, as may be necessary, whereby aligning one side of the fabric panels at the completion of the sewing operation.

Abstract: A sewing machine provided with a fan which is formed as an integral part of the handwheel and drive pulley and serves the purpose of drawing air there through for cooling. A shroud and a baffle cooperate to direct the air drawn in by the fan downward and over the bottom cover of the sewing machine which is provided with heat dissipating fins.