Sewing – Elements – Frames
Patent
1980-04-28
1981-04-21
Hunter, H. Hampton
Sewing
Elements
Frames
D05B 7500
Patent
active
042626153
ABSTRACT:
A cover construction for a sewing machine work support column which is adapted to contain a looper and a thread-cutting device comprises an upright support member or column upon which a substantially L-shaped cover member is pivotal. The cover member includes a cover plate portion which extends horizontally in a closed position and covers the top of the device and a side portion which extends vertically in a closed position. The cover plate member is openable to a position opened outwardly from the support member in which position the cover is located in a vertical position and the side portion in a horizontal position. The side portion includes two bearing faces which are defined on the back and the bottom faces thereof, respectively, and which will abut against a top bearing surface of a locking member which is displaceable along the height of the upright support member. In the open position, one bearing face on the side wall is engaged on the locking member and in the closed position, the bottom bearing face engages on the top of the locking member. The locking member is biased by a coil spring around the mounting member in an upward direction in which it contracts the bearing face on the side wall in an open position of the cover and the bearing face on the bottom wall in the closed position of the cover. In addition, the cover has a torsion spring associated with it which rotates it to an open position when the locking member is pushed downwardly against its biasing spring.
REFERENCES:
patent: 1744774 (1930-01-01), Le Vesconte
patent: 2367813 (1945-01-01), Wesson
patent: 2945461 (1960-07-01), Perla
patent: 3066627 (1962-12-01), Schlosser et al.
patent: 3344762 (1967-10-01), Szostak et al.
Hunter H. Hampton
Pfaff Industriemaschinen GmbH
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