Needle bar drive for counterbalanced sewing machines

Details Needle bar drive for counterbalanced sewing machines Needle bar drive for counterbalanced sewing machines

1984-10-16

1985-09-10

Schroeder, Werner H.

Sewing

Elements

Driving mechanisms

74591, 74604, D05B 5514

Patent

active

045399220

ABSTRACT:
The needle bar drive of a counterbalanced sewing machine comprises, in addition to a counterbalance weight connected to the driving crank, a second counterbalance weight which is driven in opposition thereto through a drive mechanism. The drive mechanism comprises an intermediate shaft which rotates at a double speed relative to the armshaft and carries and drives a third counterbalance weight.

REFERENCES:
patent: 2128120 (1938-08-01), Christensen et al.
patent: 3040682 (1962-06-01), Leslie
patent: 3318274 (1967-05-01), Schoij
patent: 3797327 (1974-03-01), Voorhees et al.
patent: 4458611 (1984-07-01), Arendash
Die Dynamik der Verbrennungsknaftmaschine, H. Schnon, Springer-Verlag, Wien 1942.

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