Description:
- Object ID: ALSA 2007.28.03
- Made by: Stanley, Great Turnstile, Holborn, London
- Model: Unknown.
- Serial Number: Unknown.
- Date Made: Early 20th century
- Approximate size: Lengh of long arm: 25 cm.
- Accessories: Leather covered case. Small circular weight.
- Condition: Good
Commentary:
Metal Planimeter in a leather-covered wooden case which also contains a metal counter-weight. “Stanley, Great Turnstile, Holborn, London” is engraved on the planimeter.
The maker of the planimeter W.F. Stanley and Company Limited, was a drawing instrument maker that traded in Great Turnstile from the 1900’s to 1914.
To use the planimeter the operator sets the anchor arm, either by pressing the needle point of the anchor arm into the drawing surface or anchoring it on a small circular weight. The user then sets the tracing arm to the graduation that is usually provided with the planimeter for the scale of the plan, zeros the recording wheels, and then with the pointer, traces the boundary clockwise all around the parcel. The area can be determined by applying a conversion factor obtained from a scale chart to the reading on the planimeter.
Source of Object: Donated by C.H. Weir, ALS #164.
Notes: The Society has only one of this make in their collection.
References: Visit article A Dying Art – Drafting becomes Impersonal for additional information.
Description by: Entered by Ed Titanich on December 23, 2024.