Sewing machine and speed adjustment mechanism thereof

Details Sewing machine and speed adjustment mechanism thereof Sewing machine and speed adjustment mechanism thereof

1977-03-18

1980-09-09

Scott, Samuel

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

74571, F16H 2904

Patent

active

042211360

ABSTRACT:
A mechanical system for speed adjustment, comprising mechanical driving means and a driven shaft member, with linking means between the driving source and the drive shaft member for driving the latter, the system further comprises a crank element comprising an eccentric disc disposed on the driven shaft member and a connecting rod driven by the eccentric disc, the connecting rod comprising an arm portion that rides the eccentric disc. Also included are means for adjusting the eccentricity of the eccentric disc with respect to the driven shaft, which adjusting means comprises a spacing element movable into and from a position between the crank element and the driven shaft, the system also contains an output shaft element driven by the connecting rod.

REFERENCES:
patent: 2033639 (1936-03-01), Lotts
patent: 2521711 (1950-09-01), Galliano
patent: 3422941 (1969-01-01), Fredell
patent: 3572481 (1971-03-01), Moritz
patent: 3726371 (1973-04-01), Versoy
patent: 3908474 (1975-09-01), Cole

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