Drafting machine head

Details Drafting machine head Drafting machine head

1981-03-26

1983-01-11

Little, Willis

Geometrical instruments

Miscellaneous

Light direction

33434, 33438, 33125C, B43L 1314

Patent

active

043675891

ABSTRACT:
A drafting machine head in accordance with this invention is provided with a rotatable drawing ruler carrier whose angular position on a graduated circle is incrementally detected by means of scanning elements and is converted into displayable angular valves by an up/down counter, and with one or several electronic data stores, characterized in that it contains an electrically actuable locking unit (10, 11) for the rotary movement of the drawing ruler carrier (13), which unit is active in any angular position and is connected through an electronic comparator (25) to the data store or stores (23) in such a way that the valves detected on the graduated circle (12) and the valves contained in the data store (23) trigger the locking if they are in coincidence.
By this means a drafting machine head is provided which can be set to a higher degree of accuracy and is less subject to wear than is known from the prior art.

REFERENCES:
patent: 4151649 (1979-05-01), Tatsuzawa
patent: 4206551 (1980-06-01), Matsugu et al.
patent: 4233751 (1980-11-01), Koenuma et al.
patent: 4241512 (1980-12-01), Chikanobu et al.

Affiliated with

Also associated with

Rating

Drafting machine head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drafting machine head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drafting machine head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-773514