|A Wilmot Calormeter, before the company became Wilmot Breeden. A point to note is the spelling of Calormeter on this device. On the very earliest meters it was spelt Calometer. It is 2-3/4" in diameter and has the Pat. No's. 238098 & 255238. |
The wings are a French aftermarket attachment, marked H. Briand, Paris. The cap appears to be from a Morris Motors Ltd. car, and dates from the late 1920's.
According to the information in the Morris Register of Victoria, Wilmot avoided Boyce motometer patents by making the stem that goes into the radiator tank longer, so it extended into the cooling liquid.