Low tolerance rotary to linear transmission

Details Low tolerance rotary to linear transmission Low tolerance rotary to linear transmission

1977-11-23

1979-12-04

Scott, Samuel

Machine element or mechanism

Gearing

Directly cooperating gears

F16H 120

Patent

active

041765613

ABSTRACT:
A low tolerance device for converting the rotary motion of a motor shaft into linear motion for use in influencing the stitch bight and work feed mechanisms of a sewing machine. The shaft of a motor is provided with a worm rigidly attached thereto. Two half nut sections are clamped around the worm and are urged against it by a leaf spring. The half nuts are connected to a drive arm by a pin which freely passes through one half nut and the drive arm and is rigidly connected to the second half nut. The leaf spring acts as a guide for the half nuts and prevents their rotation about the worm. Rotation of the motor in either direction causes the half nuts to translate along the axis of the worm. The translation of the half nuts is transferred to the drive arm through the pin.

REFERENCES:
patent: 1896209 (1933-02-01), Vitale et al.
patent: 3730008 (1973-05-01), Sheesley
Siegl--Access Drive Mechanism--IBM Technical Disclosure Bulletin--vol. 13, No. 12, 5/12/71.

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