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US 4,057,272 AGranted
Arm top cover for locking devices
AssigneeThe Singer Company
InventorsErwin Vahle, Helmut Tautz
Life of this patent
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Abstract
A locking device for a top cover on a bracket arm of a sewing machine which employs a latching device of which the retractable bolt is associated with a thread guiding member shiftably supported on the bracket arm and projecting exteriorly thereof. When the cover is in place there are no visible latching devices or fastenings to detract from the overall appearance of the sewing machine.
Claims4
In a sewing machine having a bracket arm with a removable top cover, a top cover locking device comprising:
- a. a pivot support attached within said bracket arm and located substantially beneath said removable top cover;
- b. a bracket pivotally attached at its mid-point to said pivot support forming a first and a second limb, said first limb extending inside said bracket arm from said pivot support, said bracket arm being formed with a hole therein through which said second limb, extending from said pivot support, projects;
- c. engaging means on said bracket arm and said top cover for assuring a proper assembled relation therebetween;
- d. cooperating latch means formed on said first bracket limb and on said top cover, said cooperating latch means being arranged for interlocking engagement when said top cover occupies said assembled relation on said bracket arm;
- and
- e. cooperating clip means formed in said bracket arm and on said top cover, said cooperating clip means being arranged for interlocking engagement, in concert with said cooperating latch means, when said top cover occupies said assembled relation on said bracket arm.
3 more elements
Dependencies are inferred from the claim text.