The Singer Company

Boleslaw Kornatowski

Albert N Cook

Kenneth D Adams

Jack Brown

Terry L Wilson

Raymond S Tyburcy

A handwheel clutch for a sewing machine having a bistable tiltable element for engaging or disengaging the clutch thereby coupling or decoupling the handwheel from the arm shaft.

Handwheel clutch for sewing machines

A free arm of a convertible bed sewing machine is provided with a rear bed extending member which is pivoted on a cover that is fitted over a fixed machine supporting leg but can be readily removed therefrom with the bed extending member to provide space for an embroidery attachment.

Convertible bed for a sewing machine

A handwheel and handwheel clutch assembly for a sewing machine having a bistable tiltable element for engaging or disengaging the clutch thereby coupling or decoupling the handwheel from the arm shaft.

Combination handwheel and handwheel clutch for sewing machines

A round foot controller has a molded cover 75 attached to a molded base 11 by interengaging projections 79 and 16 extending in opposite directions toward each other from the rims of telescoping walls 77 and 13. The wall 77 is near the perimeter of the cover and is concentric with another wall 76 that surrounds the wall 77. The wall 13 concentrically surrounds another wall 14 in the base. The base has openings 96 and the cover has corresponding openings 97 left by the respective molds that form the undersides of the projections 16 and 79. The double-walled structure of the cover telescoping with the double-walled structure of the base prevents inadvertent access to the electrical components in the foot controller. However, the resistence of a variable resistor 21 or 103 in the controller, can be varied by pressure on any part of the cover 75.

Foot controller

A molded, elastomeric strain relief 11 fits into an opening 36 in a housing 43 having an edge 37 and an edge of a wall portion 42 spaced apart by a distance less than the distance between outer edges of shoulders 17 and 18. A central portion 14 of the strain relief substantially fills the opening. An entrance end 13 with a beveled surface 27 on the same side as the shoulder 18 tapers toward the opposite side from which extends a projection 23 with a shoulder 24. The latter shoulder and the shoulder 17 grasp a barrier 56, one wall of which is the wall portion 42, and the shoulder 18 and another shoulder 28 grasp the opposite edge 37 of the opening to hold the strain relief firmly in place. Side recesses 31, 32 include shoulders against which pressure can be directed to deform the elastomeric material enough to get the shoulder 18 into the opening. Once sufficiently in, the strain relief pivots to engage the shoulder 24 behind the barrier 56.

Elastomeric molded strain relief

An automatic bobbin winding system for lockstitch sewing machine having the capability to wind needle thread around said bobbin while said bobbin is supported within the looptaker of the sewing machine wherein a depleted condition of the bobbin is sensed causing the work feed system to be disconnected, the bobbin winding system to be enabled and endwise reciprocation of the needle bar to be suspensed after needle thread is introduced into the bobbin winding system in order to fully wind the bobbin supported within the looptaker. When the bobbin is completely wound, a full bobbin sensing device is activated which terminates the bobbin winding, reinitiates the work feeding system and the endwise reciprocation of the sewing needle in order to continue stitching at that point where bobbin thread depletion was first sensed.

Automatic bobbin winding system

A light socket for bayonet-type lamps in which the contacts therein are in the form of levers having one end formed to engage the contacts of a lamp inserted into the socket. The levers pivot on the electrically conductive tubes into which the ends of lead wires may be inserted for conducting electrical power to the levers.

Light socket with lever contacts

A contact assembly which includes a contact holder having means integral therewith for electrically terminating a lead wire. A contact element is slidably disposed in the contact holder and includes an outwardly protruding tang for engaging a closed slot in the contact holder thereby retaining the contact element in the contact holder.

Light socket with plunger contacts

A transformer comprising a stack of sheet metal laminations; an insulating plastic bobbin on which a primary coil is wound; an insulating plastic bobbin on which the secondary coil is wound; and two interengaging insulating plastic covers which enclose the primary coil and provide additional insulation between the primary coil and the laminations and between the primary and secondary coils, while also providing a strain relief for the primary leads from the primary coil. The plastic components are formed to provide two mms of insulation between the primary and secondary coils, and between the primary coil and the laminations. The plastic components are arranged to provide at least 10 mms of 'creepage' distance between primary and secondary coils and at least 8mms between the primary coil and the laminations. The insulation provided is sufficient to permit the steel laminations to be mounted directly on the metal frame of an appliance.

Growing community of inventors

Elizabeth, NJ, United States of America

Boleslaw Kornatowski