This object is part of a collection relating to the history and development of calculating devices assembled by Assoc Professor Allan Bromley of Sydney University, comprising mathematical instruments, slide-rules, mechanical and electronic calculators, electronic analogue computers, computer components, kit computers, education computers, and associated ephemera.

Allan Bromley was a lecturer and researcher at the University of Sydney Basser Department of Computer Science from 1978 until his untimely death in August 2002. He specialised in Computer Architecture, Computer Logic and in particular the History of Computing. He was regarded as the world authority on Charles Babbage's Calculating Engines (instigating the building of the Difference Engine No.2 at the Science Museum London) and the Ankithera Mechanism and had extensive knowledge of calculators, analogue computers, logic, stereopsis, totalisators, clocks and time keeping and mechanical engineering.

Stanley & Co., c.1949

Source: John Blackler. Date: 1984 / 4 / 14

Planimeter with case, Allbrit, stainless steel / plastic / leatherette, made by Stanley & Co, England, c. 1949

Allbrit Planimeter - blacked and stainless steel rods with plastic roller and vernier, in black velvet-lined leatherette case. This planimeter has an unusual short form of tracing arm, probably used for graphs of a fixed scale. It has a steel bounded white plastic roller which accumulates the distance travelled and increments a counter wheel via a small worm drive.

Made: 1944 - 1954

One side of the tracing arm is marked "1 REV = 10 []" ", JCB and "2.21.711". The other side of the tracing arm is marked "10735", the blackened steel supporting arm is marked "Made in England"

2010/1/164

1944 - 1954

232 mm

85 mm

42 mm