-40%
Rare 1890 CLINOGRAPH Folding Wood Ruler J HARRISON Patent - W.H. HARLING LONDON
Rare 1890 CLINOGRAPH Folding Wood Ruler J HARRISON Patent - W.H. HARLING LONDON
Rare 1890 CLINOGRAPH Folding Wood Ruler J HARRISON Patent - W.H. HARLING LONDON
Rare 1890 CLINOGRAPH Folding Wood Ruler J HARRISON Patent - W.H. HARLING LONDON
Rare 1890 CLINOGRAPH Folding Wood Ruler J HARRISON Patent - W.H. HARLING LONDON

Rare 1890 CLINOGRAPH Folding Wood Ruler J HARRISON Patent - W.H. HARLING LONDON

$ 31.67

Availability: 100 in stock

Description

The Clinograph was an early drafting instrument, circa 1890
Folding wood ruler is a simple drawing instrument which is normally used with a T-square.
It is used by placing one of the fixed edges on the T-square and the adjustable edge can then be turned to the required angle. It is held in position by the friction within the stiff brass joint
Designed by Joseph Harrison stamped Harrison's patent m
ade by W.H. Harling London, a high quality mathematical instrument maker
In excellent condition no cracks or splits, some writing on reverse
Solid hardwood with brass hinge
Stamped "THE CLINOGRAPH" Harrison's Patent, W.H. HARLING LONDON
7" x 6-5/8" x 4-1/4"
A terrific find for the collector