Model, scale 1:4, of double grindstone wheels, without cover
1853
Model, scale 1:4, of double grindstones
- Made:
- 1853 in Manchester
model of double grindstones, scale 1:4, by William Muir & Co., Manchester, 1853.
Muir patented his double grindstone in 1853. The Dictionary of National Biography records: 'A model of his grindstone, patented in 1853 (No. 621), may be seen at South Kensington Museum. This consists of two stones running in contact, one being caused to traverse longitudinally, with a very slow motion. In this manner each stone corrects the defects of the other, and both are maintained accurately cylindrical in form.'
This unusual arrangement of workshop grindstones had the object of keeping the grindstones true by causing them to rub together.
The stones are mounted on parallel shafts in the same trough in contact with each other, but they are made to revolve at different speeds so that there is a mutual rubbing action between them. To prevent grooving a lateral motion is given to one of the stones by a worm and wheel which operates a cam. As the grindstones wear they are brought nearer together by means of a pair of right and left-handed screws.
Details
- Category:
- Hand and Machine Tools
- Object Number:
- 1858-12
- Materials:
- cast iron, wrought iron, stone, brass (copper, zinc alloy) and paint
- type:
- model
- credit:
- William Muir & Co.
