Sewing machine with retractable handwheel
AssigneeBrother Kogyo Kabushiki Kaisha
InventorOsamu Kamiya
Life of this patent
Estimating the term…
Abstract
A sewing machine has a retractable handwheel which is always biased toward the outside of the frame by a resilient member. When pushed into the frame against the biasing action of the resilient member, the handwheel is locked in a retracted position in the frame by an actuating member. The handwheel is released in conjunction with operation for opening a cover covering the spool chamber of the sewing machine to allow the handwheel to be projected outwardly of the frame, so that the manual rotation of the handwheel may be effected.
Claims20
A sewing machine having a frame, a main shaft rotatably mounted upon said frame, stitch forming instrumentalities, including a sewing needle, operatively connected to said main shaft, and a handwheel mounted upon and rotatable with said main shaft, said sewing machine comprising:
- said handwheel having a closed outer end surface for enclosing the end of said main shaft upon which said handwheel is mounted;
- recess means formed within a sidewall of said frame;
- means supporting said handwheel for axial slideable movement upon said main shaft between a first retracted position, at which said handwheel is stored within said recess means of said frame such that said closed outer end surface of said handwheel is substantially flush with said sidewall of said frame, and a second extended position at which only said handwheel projects outwardly from said recess means of said frame and beyond said sidewall of said frame so as to thereby permit manual operation of said handwheel by an operator;
- and
- means for releasably holding said handwheel at least at one of said first and second retracted and extended positions.
A sewing machine having a frame, a main shaft rotatably mounted upon said frame, stitch forming instrumentalities, including a sewing needle, operatively connected to said main shaft, and a handwheel mounted upon and rotatable with said main shaft, said sewing machine comprising:
- said handwheel having an outer end surface;
- recess means formed within a sidewall of said frame;
- means supporting said handwheel for axial slideable movement upon said main shaft between a first retracted position, at which said handwheel is stored within said recess means of said frame such that said outer end surface of said handwheel is substantially flush with said sidewall of said frame, and a second extended position at which said handwheel projects outwardly from said recess means of said frame and beyond said sidewall of said frame so as to thereby permit manual operation of said handwheel by an operator;
- means engageable with said handwheel for holding said handwheel at least at one of said first and second retracted and extended positions;
- resilient means for biasing said handwheel toward said second extended position;
- and
- manually operated means movably disposed upon said frame for causing release of said holding means from engagement with said handwheel so as to permit said handwheel to be moved to said second extended position under the biasing influence of said resilient means.
A sewing machine having a frame, a main shaft rotatably mounted on said frame, stitch forming instrumentalities including a sewing needle and operatively connected to said main shaft, and a handwheel mounted on and rotatable with said main shaft, said sewing machine comprising:
- means for supporting said handwheel on said main shaft for axial slidable movement between a retracted position in which said handwheel is stored in said frame and an extended position in which said handwheel is projected outwardly of said frame to thereby permit manual operation by an operator;
- recess means formed on said frame for accommodating said handwheel therewithin when said handwheel is in the retracted position;
- means engageable with said handwheel for holding the same at least in one of the retracted position and the extended position;
- resilient means for urging said handwheel toward the extended position;
- cover means for covering a spool chamber formed on said frame;
- and
- means operatively connected with said cover means for releasing said holding means from engagement with said handwheel.
Dependencies are inferred from the claim text.