Abstract: The disclosure describes how, by starting with the final equation (11) in U.S. Pat. No. 4,177,579 and by making certain assumptions and by rearranging, collecting and reducing the equation further, the apparatus to produce the same result will cut the cost dramatically. All of this is accomplished in accordance with a demonstrated mathematical relationship.

Abstract: A plurality of like fabric layers, each of which is formed with a concavely curved edge, a convexly curved edge, and a straight edge, are held together at one end with a metal grommet. A selected edge and selected numbers of layers are disposed under a presser foot against a thickened edge of material to be sewn to support and maintain the presser foot level, and to thereby prevent stitch shortening.

Abstract: An electronic control board implemented by a printed circuit board is supported on a flexible lens or bezel which may be flexed to allow insertion, so as to be retained. The edges of the bezel are received in the interior periphery of an opening in a support housing, which opening is closed off by the bezel and by a cap which retains the exposed periphery of the bezel in its interior portion. Lugs may extend from the support housing and the cap against the printed circuit board to provide better support. The entire assembly is maintained unitary and retained to a power tool by fastening means such as screws extending therethrough and into the power tool.

Abstract: A thrust washer on the looptaker shaft of a sewing machine between the underside of a hook body and the top end of a bushing wherein the looptaker shaft is rotatable is provided with thread engageable peripheral flanges, one of which is disposed to extend upwardly into a recess formed in the hook body and the other one of which extends downwardly over the top edge of the bushing.

Abstract: A hand operable chain stitch sewing machine is provided with a top work feeding arrangement wherein a feed dog is moved away from a stop to engage and move a work piece under a sewing needle. The stop is adjustable and may be positioned with an operator's control to predetermine stitch length.

Abstract: A gas pressure regulator including an under and over pressure shut-off valve assembly has a toggle mechanism which "breaks" a critical connection when the outlet pressure gets too high.

Abstract: The control loading system described is capable of higher performance than anything available heretofor because of certain described features built in. The control loading system that is described includes a force transducer to develop an electrical signal corresponding to the force applied to the manually-operable controls of a vehicle simulator to develop a "feel" as sensed by an operator that matches the real world response of actual controls. A computer generates an electrical signal corresponding to the force required for these controls to give these realistic cues. A compare circuit generates a signal corresponding to the difference between the applied force and the required force, and the usual actuator device develops a force on the manually-operable vehicle controls in response to this difference signal. One of the more significant features of the invention is the monitor which detects deviations in force magnitude to disable the control loading system when the force detected exceeds a pre-set limit.

Abstract: A method for implementing winding of a lower thread bobbin in place in a looptaker of a sewing machine from an upper thread supply. A buttonhole pattern in which at least one initial stitch is effected at one end of the buttonhole prior to holding needle bar reciprocation in abeyance while feeding the work material to the other end of the buttonhole, is selected but is utilized without a traveling buttonhole foot which would reinitiate stitching and feeding of the work material. Instead, any other presser foot, or no presser foot, is used so that bobbin winding may proceed after upper thread is initially brought to the lower bobbin, without having thread flow interferred with by needle bar reciprocation.

Abstract: A sewing machine motor is provided with an elongate pin which is affixed in the end portions of the arms of sheet metal motor end brackets, and which is pivotally mounted in frame affixed resilient end blocks to enable the motor to be adjusted about the axis of the pin for the purpose of altering tension in a belt driven by the motor.

Abstract: A chain stitch sewing machine including a looper and cam assembly with cam tracks engageable by an actuator, a gate pivotally mounted on the assembly and a spring with one free end to engage and move the gate into positions controlling actuator movement between the tracks is provided with camming surfaces on a fixed member for lifting the free end of the spring to the top of the gate for passage from one side to the other.

Abstract: A resilient serpentine shaped tungsten wire is formed to match a short wire section to hold a ring laser gyroscope getter. The getter-holder assembly is positioned within a stepped oblong bore so that the getter is in firm contact with the bore surface at two points. This prevents resonances of the getter or holder that might otherwise destroy the getter while subjected to vibrations.

Abstract: An expanded interval drive mechanism for a program timer includes a lift cam which periodically engages a pawl lifter to move the pawl lifter so as to lift the drive pawl away from the ratchet teeth. The ratchet teeth are at two levels. Where the ratchet teeth are at the lower level, operation of the pawl lifter prevents the drive pawl from engagement with the lower level ratchet teeth. However, the higher level ratchet teeth are always engaged by the drive pawl regardless of the operation of the pawl lifter. Therefore, an expanded interval is achieved in the region having the lower level ratchet teeth.

Abstract: A manually operable input control member is mounted in a sewing machine for linear movement into a reverse feed controlling position and for pivotal movement therefrom into a reverse feed sustaining position wherein the member is held against a spring which is provided to bias it toward an unactuated hands off position in the machine.

Abstract: To efficiently store the large amount of data required for the sewing of large embroidery patterns which are sewn along continuous paths, the path is divided into a plurality of contiguous segments and for each of the segments there is stored the length of the segment and its slope and rate of change of slope at the start of each segment.

Abstract: A projection screen is formed as at least one reflective holograms each of which, when referenced with a projector, reconstructs a defined observation pupil.

Abstract: Flow from the inlet chamber to the outlet chamber is regulated by the sleeve valve moving relative to the metering cone fixed in the valve body. The valve is guided in the stainless steel ring molded into the partition between the chambers. The valve is actuated by a hybrid linear actuator. The valve seats on the shoulder or flange and the effects of lift-off of the valve are minimized by the sharp edge on the valve and by the uniform diameter section of the metering cone. The sleeve valve is offset inwardly so the I.D. at the sharp edge is the same as the O.D. where the valve passes through the ring. This prevents loss of control of the valve. The valve hits a stop before the sleeve clears the cone and this prevents the valve from reaching a position in which the actuator and return spring have no effect.

Abstract: A compact keyless chuck having means therein for isolating inasmuch as possible, impact and abrasion on an operator's hand normally encountered when the chuck jaws bottom, for example, about a rotatable work tool. A free floating sleeve, rotatable and slidable with respect to the chuck encircles the same and is provided with a surface thereon for implementing actuation of the tightening or loosening of the rotatable work tool upon motorized operation of the machine spindle.

Abstract: Variable ratio transmission mechanism and associated gearing correct volumetric flow indications of a gas meter as a function of temperature and/or pressure variations in gas flowing through the meter, or by a manually selectable fixed factor adjustment.

Abstract: A pattern selecting dial for a sewing machine is connected through a toothed driving belt to a remotely located rotatable member which carries a circularly arranged stepped cam and which can be turned with the application of low torque to the dial to effect the selective positioning of a cam follower opposite a pattern controlling cam stack.