Clinograph

1973/054-1

Harrison’s patent clinograph (c.1900)

SKU: 1973/054.1 Categories: ,

Description

Harrison’s patent clinograph in mahogany with brass hinge (c.1900).

The Clinograph (Harrison’s Patent) is a set-square with a swivelling blade, used in conjunction with a T- square, for drawing lines parallel, perpendicular, or symmetrically inclined to any given line or direction.
With one edge of the instrument resting against the edge of the T-square, the blade can be instantly set to the required position, and the friction of the joint is sufficient to hold it firmly while in use.
For drawing parallel lines it is slid along the T-square to any part of the drawing paper. For perpendicular or symmetrical lines, after being set, it is turned with its other edge against the T- square, or with its other face on the paper, as the case may be, after which it is slid into any position as before.
Since one edge always rests against the T- square, the discomfort attending the ordinary methods of drawing inclined lines is avoided, and such work is greatly facilitated, whilst at the same time greater accuracy is secured.

(Ref: Walmisley A.T. Field Work and Instruments. D Fourdrinier, London. 1900.)

Additional information

Acquisition Number

1973/054-1

Item Type

Short Description

Harrison's patent clinograph

Manufactured by

Date of Manufacture

c. 1900

Sub-items

None

Supporting Items

None

Makers Number

None

Marks

None

Dimensions (mm)

181 x 170 x 3 (fully open)

Donor

Date Donated

June 1973

Materials

Mahogany and brass

Condition

Good

Display Location