Planimeter

2018/006

Polar planimeter in wood and leather box made by WF Stanley & Co Ltd

SKU: 2018/006 Categories: ,

Description

Polar planimeter in wood and leather box made by WF Stanley & Co Ltd. Used for mechanically measuring the area of a plane surface on a map or plan.

he instrument is used as follows. The tracer point is moved to follow the boundary of a region to be measured. As the tracer point moves the wheel partially rolls and partially slides on the plan, and the integrating wheel records the distance the wheel travels perpendicular to the tracer arm. Once the tracer point completes its circumnavigation of the boundary, the number of turns of the wheel is proportional to the area of the region. When the instrument is calibrated appropriately, the area of the region can be read from the scale.

Additional information

Acquisition Number

2018/006

Item Type

Short Description

Polar planimeter made by WF Stanley & Co Ltd

Manufactured by

Date of Manufacture

c. 1937

Sub-items

Wood and leather box

Supporting Items

None

Makers Number

3340

Marks

None

Dimensions (mm)

250 x 90 x 40 (box)

Donor

Date Donated

February 2018

Materials

Metal and glass

Condition

Good

Display Location