Duplicating drawing apparatus

Details Duplicating drawing apparatus Duplicating drawing apparatus

1986-12-31

1988-03-29

Haroian, Harry N.

Geometrical instruments

Scriber

Pantographic

B43L 1310

Patent

active

047334738

ABSTRACT:
A duplicating drawing apparatus includes a frame and a support assembly mounted on the frame for linear movement in an X direction. A pair of rotary members are rotatably mounted on the support assembly. Each rotary member rotates about a Z axis extending in the Z direction that is at a right angle to the X direction. In one form, a sub-assembly unit which carries the rotary members can be movably mounted on the support assembly for substantial linear movement in a Y direction that is substantially at right angles to the X and Z directions. An extension arm attached to each rotary member extends outwards away from the sub-assembly. Attached to the end of each extension arm is a holder means which holds a writing instrument. When the user writes or draws using either of the writing instruments, the other writing instrument moves to produce a duplicative mirror-image copy of the user's drawing.

REFERENCES:
patent: 548327 (1895-10-01), Russell et al.
patent: 841223 (1907-01-01), Bronner
patent: 3111761 (1963-11-01), McAlister
patent: 3775852 (1973-12-01), Sandin

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