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US 4,603,614 AGranted
Electromagnetic jigsaw
OwnerMarcel Charonnatinventor
Life of this patent
Estimating the term…
Abstract
The saw is of the type comprising a blade one of whose ends is firmly fixed to a plate capable of vibrating under the effect of an electro-magnet fed with AC current. In accordance with the invention, the vibrating plate (3) is provided with at least one inertia mass (15). The saw may be used by fixing the blade (5) only to the vibrating plate (3), by one of its ends, the other end remaining free.
Claims9
An electro-magnetic jig-saw, comprising:
- a blade having an upper end and a lower end;
- a plate vibrated by an electro-magnet supplied with AC current, the plate having two pairs of opposite edges and the plate being spaced, at rest, from the electro-magnet;
- fastening means securing said lower end of the blade to the plate;
- at least one inertia mass formed by a weight affixed to the plate;
- and,
- means for varying the spacing between the vibrating plate and the electro-magnet, acting only on a portion of the plate adjacent to said edges.
3 more elements
An electro-magnetic jig-saw, comprising:
- a blade having two ends, one of the ends being secured to a plate, the plate being vibrated by an electro-magnet supplied with AC current;
- a receiving plate for receiving the material to be cut, said receiving plate being disposed above the vibrating plate and having a hole for passing the blade therethrough, the receiving plate defining a surface projecting upwardly in a direction of said hole.
Dependencies are inferred from the claim text.