Alexander W Kerr

US Patent:

45274975, Jul 9, 1985

Filed:

Dec 27, 1982

Appl. No.:

6/453313

Inventors:

Alexander F. Kerr - Hazlet NJ
Hiroshi Kiyoshima - Utsunomiya, JP

Assignee:

The Singer Company - Stamford CT

International Classification:

D05B 2708

US Classification:

112313

Abstract:

A differential feed system in which a main feed bar supports an auxiliary feed bar for rising and falling motion but for independent longitudinal motion and wherein longitudinal motion of the auxiliary feed bar is derived from oscillations imparted to a differential feed shaft from a main feed shaft. A safety mechanism is provided in which a safety bar is pivotably connected to a feed regulator control for the main feed and is fashioned with a lost motion connection to a feed control for the auxiliary feed. Motion of the lever for auxiliary feed control is possible in a limited range determined by the degree of lost motion in the safety bar and motion of this lever beyond the limited range will shift the regulator for the main feed system in the same increasing or decreasing feed direction as the lever for the auxiliary system is being shifted.