Drafting apparatus
OwnerAnthony J. Boardinventor
Life of this patent
Estimating the term…
Abstract
The drafting apparatus has only three parts which are the permanently attached first head and blade, the adjustably attached second head, and the thumb screw. The apparatus quickly adjusts to a given surface. If secure attachment is desired, the thumb screw is tightened against the blade to position the second head firmly against a side of the surface opposite the first head. If desired, the second head is easily completely removed, to aid a draftsperson in a given task. The apparatus is not confined to use only on a drafting table. The transparent bevels provide visual access to indicia under part of the blade. The relatively long length of the elongated slot provides for fit to even narrow drawing surfaces.
Claims9
A drafting apparatus, comprising, in combination:
- a blade having a first end, a second end, and a length therebetween, the blade further comprising:
- a first notch within a first side of the blade;
- a second notch within a second side of the blade;
- a first bevel having a horizontally disposed first bevel tooth, the first bevel first bevel tooth fitted to the first side first notch;
- a second bevel having a horizontally disposed second bevel tooth, the second bevel second bevel tooth fitted to the second notch;
- a first head perpendicularly affixed to the first end of the blade, the first head having a sculpted outer edge spaced apart from a straight inner edge;
- a second head selectively and positionably affixed along the length of the blade, the second head comprising a second sculpted outer edge spaced apart from a second straight inner edge.
A drafting apparatus, comprising, in combination:
- a blade having a first end, a second end, and a length therebetween, the blade further comprising:
- an elongated slot extended from proximal to a blade center to proximal to the blade second end;
- a first notch within a first side of the blade;
- a second notch within a second side of the blade;
- a first transparent bevel having a horizontally disposed first bevel tooth, the first transparent bevel first bevel tooth fitted to the first side first notch;
- a second transparent bevel having a horizontally disposed second bevel tooth, the second transparent bevel second bevel tooth fitted to the second notch;
- a first head perpendicularly affixed to the first end of the blade, the first head having a sculpted outer edge spaced apart from a straight inner edge;
- a second head slideably and selectively affixed to the elongated slot of the blade, the second head affixed to the blade at a desired angle, the second head comprising:
- a second sculpted outer edge spaced apart from a second straight inner edge;
- a threaded orifice in a center of the second head;
- a thumb screw having a round top above a reduced diameter shoulder, a thread below the shoulder, the thread selectively received by the threaded orifice of the second head, the blade abutted by the shoulder in selectively and positionably retaining the second head to the blade.
Dependencies are inferred from the claim text.