British Patent Office - Abridgments Class 112 Sewing Embroidering 1921-1925 (1929)
British Patent Office · leaf 103
, so that the motor ean be secured in any one of several different positions. The tongue and groove 14 may be straight or curved and are approximately con- centric with the machine shaft 4. An idler pulley 18 carried by a lever-arm 19 is pressed on to the driving-belt by a spring 20. 182,057.… … Sewing-machines; driving.—In an _ electric motor unit. rigidly mounted on the rear side of a sewing-machine standard 1, Fig. 1, the field magnets 27, Fig. 5, are flattened vertically at opposite sides of the motor shaft so that the motor is substantially within the area of the machine bed. ‘The…
British patents · Patents · Sewing · Embroidering · Embroidery
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