Electromechanical calculating machines from the 1960's
home - about - contact
 

Rotary calculators

Printing calculators

Mechanisms
Stepped drum
Pinwheel
Oscillating rack
Proportional lever
Proportional gear
Adjustable pawl

Glossary

Other calculating devices

References and links

Acknowledgements

Wanted

 

Mechanisms - oscillating rack

image modified from illustration in Murray, Mathematical Machines, v1