Pinwheel calculator

A Pinwheel calculator was a class of mechanical calculator popular in the 19th and 20th century using, for its calculating engine, a set of wheels that had an adjustable number of teeth. These wheels, also called pinwheels, could be set by using a side lever which could expose anywhere from 0 to 9 teeth, and therefore when coupled to a counter they could, at each rotation, add a number from 0 to 9 to the result. By linking these wheels with carry mechanisms a new kind of calculator engine was invented. Turn the wheels one way and one performs an addition, the other way a subtraction. As part of a redesign of the arithmometer, they reduced by an order of magnitude the cost and the size of a mechanical calculators on which one could easily do the four basic operations (add, subtract, multipl

##### Wikipage disambiguates

##### primaryTopic

Pinwheel calculator

A Pinwheel calculator was a class of mechanical calculator popular in the 19th and 20th century using, for its calculating engine, a set of wheels that had an adjustable number of teeth. These wheels, also called pinwheels, could be set by using a side lever which could expose anywhere from 0 to 9 teeth, and therefore when coupled to a counter they could, at each rotation, add a number from 0 to 9 to the result. By linking these wheels with carry mechanisms a new kind of calculator engine was invented. Turn the wheels one way and one performs an addition, the other way a subtraction. As part of a redesign of the arithmometer, they reduced by an order of magnitude the cost and the size of a mechanical calculators on which one could easily do the four basic operations (add, subtract, multipl

##### has abstract

A Pinwheel calculator was a cl ...... ss of the Odhner Arithmometer.

@en

Ein Sprossenrad ist ein Zahnra ...... ach Willgodt Theophil Odhner).

@de

Las calculadoras de ruedas de ...... estar, multiplicar y dividir).

@es

Une roue à nombre variable de ...... ortent par un système de came.

@fr

##### Link from a Wikipage to an external page

##### Wikipage page ID

##### Wikipage revision ID

734.909.130

##### subject

##### type

##### comment

A Pinwheel calculator was a cl ...... ations (add, subtract, multipl

@en

Ein Sprossenrad ist ein Zahnra ...... ach Willgodt Theophil Odhner).

@de

Las calculadoras de ruedas de ...... estar, multiplicar y dividir).

@es

Une roue à nombre variable de ...... s l'autre sens elle retranche.

@fr

##### label

Calculadora de rueda de pines

@es

Pinwheel calculator

@en

Roue à nombre variable de dents

@fr

Sprossenrad

@de