Automatic drafting device

Details Automatic drafting device Automatic drafting device

1982-02-11

1984-06-26

Stearns, Richard R.

Geometrical instruments

Scriber

346 29, G01D 900, B43L 1302

Patent

active

044557515

ABSTRACT:
An automatic drafting device has a carriage with toothed wheels in meshed engagement with toothed racks extending across a planar support surface. A pressure regulation device is mounted on the carriage and regulates the pressure applied to a stylus holder held by the device. The stylus holder containing a writing instrument can be lifted and lowered by a direct current motor with an eccentric disc. The writing tip of the instrument held in the stylus holder, when not in use, is supported on a soft resilient material, such as rubber, to form a seal preventing air from reaching the tip. When the writing instrument is lifted off the resilient material it is ready to write.

REFERENCES:
patent: 1746420 (1930-02-01), Fung
patent: 2332511 (1943-10-01), Glassman et al.
patent: 4197550 (1980-04-01), Held
patent: 4346445 (1982-08-01), Leuenberger et al.
patent: 4356632 (1982-11-01), Anderka

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