1930s Rototherm Wall Hanging Thermometer In An Art Deco Wood Case

A lovely 1930s Rototherm Wall Hanging Thermometer In An Art Deco Wood Case.

It has a brass coloured face, with an easy to read dial showing the Fahrenheit ‘freezing point’ temperature of 32 ºF, and measures from 0 to 120 ºF.

Made by the British Rototherm Co. Ltd, London, England, British Patent Number 378314: patent dating to 1932.

A ‘must have’ item for the man cave, she den, study or office. It measures temperature in Fahrenheit and is encased in a Wood moulding with a metal back, allowing it to display nicely on the wall or leaning on the mantelpiece: (It is not freestanding).

The bimetallic thermometer is in pretty good working order. The wood has some scuffs and blemishes which might benefit from being stripped and polished: I've not been tempted to do this as some people prefer to see the patina. The brass coloured face is in pretty good condition with a few minor blemishes.

Approximate Dimensions:
Width: 8.4cm
Length: 12.4cm (5")
Height : 3cm
Diameter of thermometer face: 6.5cm

NB: The images are taken with and without flash, hence the colour differences.

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Bimetallic Thermometer

Rototherm invented the bimetallic thermometer in 1934. The thermometer has a metal pointer that moves up and down a circular scale. The pointer is mounted on a coiled piece of metal called a bimetallic strip. The hotter the temperature, the more the bimetallic strip expands, and the more it pushes the pointer up the scale.