Convertible open-arm sewing machine

Details Convertible open-arm sewing machine Convertible open-arm sewing machine

1976-12-06

1978-07-11

Krizmanich, George H.

Sewing

Elements

Frames

D05B 7306

Patent

active

040994740

ABSTRACT:
A sewing machine convertible between flat bed and cylinder bed configurations and adapted to be mounted in cabinets of conventional design. The machine includes a base cabinet arranged to alternately support a lower cylinder arm flush with a cabinet top for flat work and at an elevated position above the cabinet top for tubular work. An auxiliary work supporting surface for flat work is responsive to relative movement between the machine frame and the support base such that it automatically retracts or extends during positioning of the machine frame between its flat bed and free arm operational positions. Counterbalancing means is provided to reduce manual effort of raising or lowering the machine between operational positions.

REFERENCES:
patent: 2398697 (1946-04-01), Colegrove
patent: 2409758 (1946-10-01), Hohmann et al.
patent: 3986755 (1976-10-01), Kohara

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