The Singer Company

Trine Products Corp.

William L Herron

Kenneth D Adams

Wolfgang Jaffe

Charles R Odermann

Donald M Genaro

John A Herr

Cristian J Felix

Philip F Minalga

Albert L Newman

Allan M Dob

Edward W Rummel

Joseph Vadacchino

John D Speckman

An electrically operable strike with a pivotable keeper and a rectilinearly slidable locking member with planar major surfaces with arms extending parallel to the surface planes, which arms in one position of the locking member prevent pivoting of the keeper and which in a second, different position of the locking member, permit the keeper to pivot. The locking member has a magnetic portion and is moved from one position to the other by the magnetic field of an electrically energizable coil having its axis perpendicular to the plane of movement of the locking member. There are two similar locking members, and with one locking member, the strike is normally locked and by replacing such locking member by the other locking member, the strike is normally unlocked. In one embodiment, the keeper engages faces of the locking member arms and in another embodiment, the keeper engages faces at the ends of the locking member arms. By inverting the strike and moving the coil to the opposite end of the strike, the 'hand' of the strike can be changed.

Strike with rectilinearly movable keeper locking member

An illuminated electrical push button switch has a pair of spring contacts secured in a housing on either side of a miniature bulb. The contacts have inclined bifurcated ends that bear resiliently against the underside of the push button. Depressing the button causes the bifurcated contact ends to deform elastically and come together making electrical contact. The pigtail leads for the bulb are sandwiched between the contacts and a block portion of the housing, all being held in place by a screw that also functions as a binding post for the external wire connection.

Illuminated push button

An electrically operable strike with a pivotable keeper and a rectilinearly slidable locking member with arms which in one position of the locking member prevent pivoting of the keeper and which in a second, different position of the locking member, permit the keeper to pivot. The locking member has a magnetic portion and is moved from one position to the other by the magnetic field of a pair of electrically energizable coils. By selection of the spacing of the arms, the strike can be either normally locking or normally unlocking. Two locking members can be used to convert the strike from normally locking to normally unlocking or one locking member with adjustable or removable arms can be used for such conversion.

A mechanism for allowing adjustment of a cushion spring assembly to vary the distance between the wall of the bobbin case and the cushion spring in two directions. Means are incorporated to permit movement of the cushion spring assembly to facilitate removal of the bobbin case from the loop taker, without affecting the adjustment of the mechanism.

Bobbin case position plate adjustment mechanism

An open bottomed sewing machine cover is tapered and slabbed at one end and provided with novel and improved latch means for use with platform beds, bed frames or bottom bed covers that are indented on the bottom at the ends to accept the latches which of comprises latch levers suspended on leaf springs adjacent the bottom edges of the open bottom provided with inward facing paddles at their lower extremities adapted to be pulled outwardly while the case is lowered over the machine to rest on the table top or over the major portion of a similar case cover for stacking and nesting and after the cover is lowered over a machine as the latch lever is released, the paddles move inward into indents provided adjacent the bottom of the machine to extend beneath the machine to support the machine for carrying.

Latch for sewing machine cover

A cam follower including an arm pivotally movable about an axis which is perpendicular to the axis of rotation of an actuating cam is provided with a shoe that pivots on the arm to maintain line contact with the cam as the cam is rotated.

Cam follower with pivotally movable cam engagable shoe

A bobbin alarm for a sewing machine which utilizes a light source and a pair of light sensors to provide a warning of low bobbin thread remaining or of a full bobbin condition. The light sensors are arranged with respect to the light source so that one sensor lies substantially on a line from the light source tangent to the hub of the bobbin and the other sensor lies substantially on a line from the light source tangent to the periphery of an imaginary cylinder having the bobbin flanges as the ends thereof. A circuit is provided which is responsive to light stimulation of both sensors (empty bobbin condition) or no stimulation of both sensors (full bobbin condition) to provide a signal to an operator in the form of an illuminated LED.

Sewing machine full and low bobbin indicator

A sewing machine cassette threading system in which the thread handling instrumentalities of a sewing machine are arranged to accept thread from either a cassette or a conventional thread spool with a minimum of operator intervention. The sewing machine has a chamber formed therein to accept the cassette. The sewing machine thread handling instrumentalities are threaded by inserting a cassette into a cover enclosing the chamber and closing the cover. Thread from a conventional spool carried on the sewing machine arm may be placed in the cover for insertion into the thread handling instrumentalities when the cover is closed.

Sewing machine cassette threading system

Sewing machine frame or similar article

A threading device facilitating threading of a pretension device located on the rear surface of the bracket arm of a sewing machine. The threading device has a segment projecting beyond a rear corner of the arm to facilitate introduction of thread by an operator seated in front of the machine. An ear and fin member guide the thread from the point of thread introduction into engagement with the pretension device, and preclude the thread from becoming unthreaded.

Pretension threading device

A linear motor for use, for example, in sewing machines for controlling needle vibration as to amplitude and/or fabric feed both in magnitude and direction, said motor comprising a frame having an internal central pole piece spaced intermediate two permanent magnets of the high energy product type which are attached to the frame, the central pole piece providing supporting means for movable coil member integrally formed with connecting arms pivotally fastened to an actuator arm carried on a pivoted potentiometer shaft. The permanent magnets are secured through their own magnetism to the frame and are each locked in proper orientation by a non-metallic retainer which is locked to the magnet and additionally formed with a closure panel, said closure panels cooperating with the motor frame completely to enclose a compartment for the movable coil member effecting both a minimum external leakage field and a dust proof unit.

Growing community of inventors

Elizabeth, NJ, United States of America

William L Herron