Linear proportioner

Details Linear proportioner Linear proportioner

2008-05-20

2008-05-20

Guadalupe-McCall, Yaritza (Department: 2859)

Geometrical instruments

Gauge

Proportional line segmenter

C033S558020, C033S432000, C033S018300, C033S023010

Reexamination Certificate

active

11833798

ABSTRACT:
A linear proportioner including a logarithmic mechanism to be used for transferring linear dimensions from an existing drawing, picture or actual scene to a new drawing or artist medium. An elongated assembly provides two indicators (one fixed and one variable) as reference pointers, two indicators (one fixed and one variable) for object pointers and an adjustment knob which, when rotated, moves the variable indicators synchronously and proportionally. By depressing the knob when transferring the first object dimension, the proportion ratio (transparent to the operator) is automatically set for subsequent dimension transfers.

REFERENCES:
patent: 967267 (1910-08-01), Thompson
patent: 2560697 (1951-07-01), Joy
patent: 2645021 (1953-07-01), Diekes
patent: 2770884 (1956-11-01), Eckert
patent: 3858324 (1975-01-01), Padowicz
patent: 4416063 (1983-11-01), Nestor
patent: 4586265 (1986-05-01), Hopkins et al.
patent: 5154004 (1992-10-01), Allen
patent: 7043849 (2006-05-01), Leger
patent: 2003/0014876 (2003-01-01), Goldie

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