Abstract: A device which introduces compressed air at an angle to thread placed in a split tube. When this split tube is placed adjacent to the eye of a sewing needle, the compressed air will shift the thread through the tube and thence through the needle eye. The split is provided in the tube to allow the device to be removed from the thread after the needle has been threaded. Frictioning means may be included for holding the thread in the tube until the compressed air is introduced.

Abstract: This disclosure relates to electronically controlled sewing machines and in particular to the combination of such a machine with a re-programmable static memory with which an operator can program in input data representative of stitch position coordinates for selected patterns, which input data will be encoded into digital form, stored and decoded into input signals for initiating operation of the sewing machine stitch position actuating means to produce patterns corresponding to the operator selected pattern. The re-programmable memory can be located remote from the machine or can be built in as an integral part of the structure of the machine itself. The machine may also contain a static read-only-memory (ROM) having fixed patterns for operation of the machine with or without a re-programmable memory and includes switching means for disconnecting the read-only-memory when the reprogrammable memory is connected to the machine.

Abstract: A rail-bearing for the shuttle in a shuttle type sewing machine in which the shuttle housing is provided with a circular rail formed to mate with a circular groove in the shuttle. This rail-groove combination is so arranged as to deter jamming of the shuttle by thread or errant bits of debris. This rail-bearing has inherent high speed capabilities and is easy to lubricate and to manufacture.

Abstract: A film strip cartridge having a film guide channel thru which film may be advanced has a film lock means disposed in the channel to selectively arrest the advancement of the film. The film lock is formed from a resilient wire which has a first end secured to a portion of the cartridge. A nub is formed in the wire intermediate to the first end and the distal end of the wire. The resilient wire urges the nub into one of the perforations formed along the margin of the film to arrest the longitudinal movement of the film and thereby prevent inadvertent film removal.

Abstract: A slam-shut valve provides overpressure protection in a pipeline in the event of regulator failure. The slam-shut valve is normally held latched in the open position. Overpressure or failure of the regulator will automatically trigger operation of the slam-shut valve to close the same and prevent further passage of the gas through the pipeline. The slam-shut valve is manually reset to the open position once it has been triggered closed.The invention includes mounting the closing spring upon the lever in loaded position. The latch lever forms a subassembly, which in turn, is installed in the housing of the slam-shut valve to operatively interconnect the latch and release mechanisms and the reset mechanism. Subsequent to installing the lever, one end of the loaded closing spring is released from the lever to snap into position against the adjacent housing wall to bias the lever to the closed position. However, closing is normally prevented by the latch which releasably holds the lever in the open position.

Abstract: A solid state Hall effect sensor is disposed between two magnets having their fields in quadrature with flux from the magnets at least partially cancelling in the Hall element to thereby enable a ferrous element relatively movable with respect to the magnets and sensor to control the output of the sensor.

Abstract: A cutter head assembly having two types of independent connecting means to insure that the cutting blade remains mounted to the cutting block even in the unlikely event that one type of connection should fail.The first type of connecting means are connecting screws which pass through slots in the blade to threadedly engage within tapped holes in the block. The second type of connecting means are security screws affixed to the blades via tapped holes therein to be disposed within apertures of the block so that after the blades are mounted in adjusted position on the set screws threaded into tapped holes which intersect the apertures will engage the security screws affixed to the blade.

Abstract: This disclosure relates to an electromagnetic selector system for selecting pattern cams in a sewing machine wherein operator influenced electric pattern selection switches are provided with each said switch corresponding to a pattern on a pattern cam. An adder mechanism is responsive to switch selection for positioning a pattern cam follower in order to transmit the pattern information from the pattern cam to the appropriate sewing instrumentality for reproducing the selected pattern.

Abstract: A polarized reversible direction solenoid having a rectangular sheet of flexible permanently magnetized material wrapped around the armature. This magnetized flexible sheet permits the construction of very small reversible solenoids at a reasonable cost.

Abstract: A canister type vacuum cleaner having mechanism for controlling the negative pressure in the filter bag compartment by bleeding ambient air into the compartment. The mechanism includes a pivotable valve plate for overlaying an aperture in the filter bag compartment and an operator laterally slidable across the front of the cleaner and operatively connected by cam means to the valve. The valve plate is pivoted to selectively block the aperture by an amount determined by the position of the operator and the degree of negative pressure is indicated by the lateral position of the operator.

Abstract: This disclosure relates to cabinets and in particular to a cabinet which is adapted for use in performing textile operation in combination with a sewing machine having both flat bed and cylinder bed working capabilities. The cabinet may be opened from a stored position, in which the sewing machine is stored out of sight and the cabinet then has the appearance of a styled table or cabinet, to a first position wherein the work bed of the sewing machine is contiguous with a working surface of the cabinet, to a second position wherein the work bed of the sewing machine is in an elevated position relative to the aforementioned cabinet working surface to permit cylinder bed operation on the sewing machine and to a third position wherein a cutting board work area may be folded out from the cabinet to an elevation for permitting an operator to perform cutting operations on a material while in an operator standing position.

Abstract: A rotor which utilizes winding guide discs to enable the slots of any rotor to be completely filled with wire without thereby increasing the diameter of the rotor by bulging out of the end windings. Winding guide discs having substantially the same cross section as the rotor are spaced a sufficient distance from the ends of the rotor to contain that portion of the end windings which will fill the space between the outside diameter of the rotor shaft and the minimum radial dimension of the slots in the rotor. After this space is filled, further end windings are wound from the rotor slots about corresponding apertures in the winding guide discs within the corresponding space on the disc. In the event that this corresponding space is filled further winding guide discs may be used as required to prevent the bulging of the end windings sought to be avoided.

Abstract: A low inertia presser bar system for a sewing machine has a short hollow presser bar including a light internal compression spring with an abutment member on top engaged in a depression in the underside of an arm of a fulcrumed bell-crank lever. An upper presser bar having a heavy spring is linked to the upper side of the same arm of the lever. A stop member is threaded into the head of the sewing machine to engage the other arm of the bell-crank lever to oppose and thereby limit the force of the upper spring and isolate the lower spring and presser bar until the lower spring is compressed solid.

Abstract: A locking device for a top cover on a bracket arm of a sewing machine which employs a latching device of which the retractable bolt is associated with a thread guiding member shiftably supported on the bracket arm and projecting exteriorly thereof. When the cover is in place there are no visible latching devices or fastenings to detract from the overall appearance of the sewing machine.

Abstract: A presser device for a sewing machine having a rockable member pivotably carried by the sewing machine frame and connected to a presser bar to axially move the same up or down, a pivoted lever urged by a spring towards the rockable member, and, a drag link carrying a roller on one end, which roller extends between the pivoted lever and one of two surfaces above and below the pivot of the rockable member to urge the presser bar upwardly or downwardly, respectively. Presser bar pressure is varied by varying the spacing between the roller and the pivot of the rockable member. Two embodiments are disclosed, a first wherein the position of the roller is varied by means of a second pivoted lever connected to the drag link; and, a second wherein a pair of push buttons operate on a bell crank connected to the drag link, one of the push buttons incorporating a cam to control movement of the drag link.

Abstract: A conventional fluid flow meter provides a single pulse output signal for each uncorrected unit volume flow. A monostable multivibrator (MV) is triggered by said meter signal and provides a gating signal for a 1 MHZ oscillator to produce a pulse train. A temperature sensor senses the fluid flow at the meter and controls the monostable MV so that the number of pulses in said pulse train is inversely proportional to the absolute temperature of the fluid flow. A preset down counter derives from said pulse train a number representing the absolute temperature at the sensor. A burst generator generates a fixed number of pulses related to a predetermined base temperature. A divider divides said fixed number of pulses by said number representing the absolute temperature of the fluid flow and provides a single pulse output for each integer resulting from said division and stores the remainder from said division for use in the next division.

Abstract: An automatic buttonholing device which uses a specially modified presser foot into which electrical contacts are inserted for actuating an electromechanical buttonholing assembly. The operator places small conductive markers on the fabric at the top and bottom of the desired buttonhole location. When the contacts on the presser foot ride over the markers, a circuit is completed and proper steps in the buttonholing sequence are initiated.

Abstract: A proximity switch using logic means to detect a difference in capacitance. A bias capacitance and a sensing capacitance are charged by a first voltage source, each through one of a first pair of FET devices matched for transconductance, during a charge interval. During a detection interval the capacitances are discharged to ground potential or to a second voltage source of opposite polarity than the first voltage source, each through one of a second pair of FET devices also matched for transconductance. The difference in discharge rate between the bias and sensing capacitance, which is a measure of the capacitance of each, is detected by a cross coupled latch (RS flip-flop), setting the latch in a particular state. A second cross coupled latch stores the data thus obtained for utilization. The proximity switch circuit may be embodied as part of an MOS LSI integrated circuit, except for the bias and sensing capacitances, or may be constructed of discrete bipolar devices.