Sources
open directory project
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
Bone crusher
From Wikipedia, the free encyclopedia
(Redirected from Bone Crusher)
A bone crusher was a device for crushing animal bones. Bones obtained during slaughter were cleaned, boiled in water and dried for several months. After that, they were suitable for crushing with the special machine into a relatively dry gritty powder was used as fertilizer.
The machine, shown in the picture, is water wheel powered. It contains the eight S-shaped pairs of cams that raise the crushers alternately and let them fall into material to be crushed. The simple transmission increases the rotation speed of the crusher wheel till 21 rpm (the water wheel rotates at about 7 rpm).
Bone meal was used since about 1790 as a welcome supplement to the ordinary farmyard manure. From about 1880 it was supplanted by chemical fertilizers.