Abstract: An electric motor is supported at one end on a molded plastic electrically non-conducting housing which is slidably mounted on the metallic frame of a sewing machine at the base and which is biased toward the base of a compression spring to set tension in a belt through which the motor drives a pulley on the arm shaft of the sewing machine.

Abstract: The inlet and outlet tubes on each side of the valve body are connected to the valve body by a notched plate engaging the shoulder upset from the tube. The upset forms a metal-to-metal seal against the seat in the body while the O-ring engages the wall of the flared section of the inlet leading to the smaller bore which receives the end of the tube.

Abstract: A microcomputer-based electronic controller for a dishwasher utilizes a motor driven timing cam for selectively energizing the electromechanical components of the dishwasher. An internal diagnostic routine in the microcomputer insures that the timing cam is advanced when the microcomputer calls for power to be applied to the motor.

Abstract: The timing cam is advanced for switching purposes by the large reciprocating pawl acting on the ratchet teeth molded on the timing cam. When the program requires a timed period during which conditions remain the same the ratchet teeth are spaced so the pawl cannot pick up the next tooth until the cam is advanced by the small pawl acting on the separate ratchet provided with small, closely spaced teeth. This ratchet has a pinion gear driving the ring gear molded inside the timing cam. The steps imparted to the timing cam by the small pawl and ratchet are very small and consume appreciable time--the length of time taken to position the next tooth for engagement by the large pawl being determined by the space between the large teeth.

Abstract: A thread tensioning module and a cover for a thread holder and cooperating take-up are mounted adjacent to one another in a front opening in the bracket arm housing of a sewing machine. The module and cover form interconnecting thread receiving slots in the bracket arm opening providing for the movement of thread into thread tensioning mechanism carried by the module and into the thread holder as the machine is threaded by an operator.

Abstract: A connection adapter module for a wire trap switch, trigger speed control, or the like that plugs into the wire trap system and provides screw clamp connections to the control for a portable electric tool such as a drill, sabre saw, or the like, enabling the tool to be rewired or the control replaced by a customer with a standard screwdriver, comprising an insulator body carrying a plurality of connector elements and which can be "piggy-backed" on the control, connector elements generally comprising inserts in the insulator body including a barrel portion having a screw threaded through the wall thereof for receiving and clamping a wire therewithin and a thin wire-like projection or pin portion extending longitudinally therefrom projecting out of the insulator body to be engaged within the switch or control wire trap.

Abstract: A safety device for use with an electric appliance to prevent the appliance from inadvertently being started if the appliance is plugged into an outlet when the on/off switch of the appliance is in its on state. A low level sensing current is applied to the appliance before full operating power is applied to the appliance. Detection of the low level sensing current prevents application of full operating power. If no sensing current is detected, full power is applied and the detector is disabled.

Abstract: A method of forming an eyelet end buttonhole pattern having two spaced apart rows of zig zag stitches joined at one end by a generally circular pattern of zig zag stitches includes first forming a single stitch in the eyelet end, then feeding the fabric in the forward direction until the stitch forming point is at the other end of the buttonhole pattern from where the initial stitch was placed. A side bar is then stitched, beginning in reverse, proceeding around the eyelet end, then in a forward direction to the other end of the pattern. The feeding is then reversed and the stitching retraces the buttonhole pattern in the opposite direction. Barring stitches are then sewn, to close and finish the buttonhole pattern with a square end.

Abstract: A chain stitch sewing machine including a double pointed looper is provided with feeding mechanism in which looper motion is used in conjunction with needle motion to control the movement of work under the needle of the machine.

Abstract: The electric motor drives high and low speed drive pinions through reduction gearing. A low torque capacity clutch is located in the reduction gear train to the low speed pinion to permit the user to turn the manual shift to position the timer. The various program cams are driven by a drive member carried by an arbor on which the cams are mounted. The cams are independently spaced relative to the arbor and housing so any may be omitted as desired. The pulsing cam is mounted on the arbor and driven by the high speed pinion. The switch blades are essentially straight, the only forming being at the contact end where contact position or pressure will not be affected.

Abstract: A means for selectively elevating a presser foot out of pressure contact with a work material when a sewing needle extends through the work material. The device includes a needle bar lever pivotally supported by the sewing machine frame and having an operative connection to the endwise shiftable needle bar for implementing oscillation thereof. A lug extending from the needle bar lever may cooperate with the second end of a lift lever having a first end operatively connected with the presser foot of the sewing machine. The lift lever is carried on a selectively shiftable pintle supported by the sewing machine frame, the pintle having a first shiftable position in which the lug extending from the needle bar lever does not engage with the second end of the lift lever and a second shiftable position in which the lug does engage with the second end of the lift lever whereby the lug will effect rotation of the lift lever and have the first end elevate the presser foot out of pressure contact with the work material.

Abstract: A one-piece plunger with a control button at one end and a driving paddle at the other end is located in a one-piece sewing machine bobbin. The bobbin is provided with crossed slots, one of which normally has the paddle therein and which is dead ended to provide a stop limiting spring biased upward movement of the plunger in the bobbin, the other slot being open ended to permit the paddle to be moved therethrough during assembly of the plunger in the bobbin.

Abstract: A dynamoelectric machine having a stator of permanent magnet segments, each segment being formed of a plurality of laminae concentrically oriented with respect to the armature, wherein an outer laminae exhibits demagnetization characteristics effective to prevent substantial permanent loss of magnetism in an inner laminae.

Abstract: An arrangement for changing the condition of an electrical circuit path when the presser bar lifter is pivoted to lift the presser bar uses a modified thread tension release cam which pivots with the presser bar lifter and a contact strip which is adapted to contact the cam when the presser bar is raised.

Abstract: A bed extension support structure for a sewing machine is disclosed which not only provides for ready removal and replacement of the bed extension but which also permits adjustment of the alignment and registration of the bed extension with respect to the work supporting bed of the sewing machine.

Abstract: An apparatus and method for implementing bobbin winding in place in a looptaker of a sewing machine. When a presser foot lift lever is manipulated to elevate a presser foot, and the sewing machine motor is activated, a series of two or three endwise reciprocations of the sewing machine is effected to bring an upper thread to the lower thread carrying bobbin, after which further endwise reciprocation of the sewing needle is held in abeyance while actuation of the sewing machine motor is continued, to provide the least disturbance of upper thread passage to the lower thread bobbin. No other bobbin winding signaling steps are required.

Abstract: A power head device for use with an external source of vacuum, which device includes an outer housing defining therewithin, in one embodiment, a brush chamber, a vacuum chamber and a dry chemical carpet cleaning powder retaining chamber. The powder retaining chamber is situated adjacent the brush chamber and is further fashioned with a device for selectively dispensing the powder onto a carpet. A horizontally oriented brush is provided having bristles offset with respect to a centerline thereof so as to provide improved agitation of the powder into a carpet on rotation of the brush opposite the direction of the offset during a cleaning mode of operation. In a vacuum mode of operating, the brush rotates in the direction of the bristle offset and towards the vacuum chamber of the housing.