US1511987A - Method of pulverizing horn - Google Patents

Description

Patented Oct. 14, 1924,

UNITED STATES FRANZ THOMAS, OF

rants? BARIVIEN, GERIVIANY.

METHOD 01F PULVER-IZING I-IGR-N.

No Drawin Application filed April 20,

To QZZ wizmn it may concern:

Be it known that I, Dr. FRANZ THoMAs, chemist, a citizen of the German Republic, and residing at Bar-men, Germany, have in vented certain new and useful Improvements in Methods of Pulverizing Horn, of which the following is a specification.

My invention relates to a method of pulverizing horn.

In the milling methods hitherto practiced the horn is first heated or roasted, then out to small pieces and finally comminuted by means of some sort of grist-mill in which thehorn is rubbed and crushed between two rubbing surfaces. Reducing the horn in a single milling operation to a powder of certain fineness is impossible. On the contrary, in order to attain a powder of the desired fineness the grist has to be milled several times. Consequently, the pulverizing takes up much time, while at the same time a great expenditure of energy is required. Besides, there always remain residues which can not be pulverized.

All these drawbacks are overcome by the new method according to my invention, the essential feature of which consists in this that the horn is no more comminuted between two rubber surfaces, but is simply ground on a grind-stone by the wet process. That is to say, the horn is pressed against a single, rotating grinding surface, while simultaneously water is supplied. Thus the horn. is reduced to a wet or slimy powder by the friction of the grained surface of the grindstone, the powder being carried away by the water. With this improved method the horn needs neither a previous treatment by heating, roasting or the like, nor must it be cut to small pieces, on the contrary, the horn can be ground immediately in its natural state, the only thing to be done is the supply of water. Consequently, the process is quite simple, and it may be carried on with a very simple de- 1923. Serial No. 633,359}.

vice. Furthermore, by the new method horn may be reduced to a very fine powder in a single grinding operation and with a comparatively small expenditure of power. Finally, the powder obtained is of equal fineness throughout, while non-reduceable residues are entirely obviated.

In carrying my improved process into practice, the horn to be pulverized is, without preceding treatment, pressed against a rotating grind-stone while simultaneously water is supplied. By the friction of the grained surface of the stone the horn is reduced to powder which is carried away by the water. Thus a wet or slimy powder of superior fineness which much excels the horn-powder produced according to the known dry process.

The grind-stone used is preferably a natural one, however, also an artificial grindstone or disc or any other known grinding surface grained like a grind-stone may be employed. Furthermore, instead of water any other suitable liquid may be supplied.

1 wish it to be stated that my method is not restricted to the precise mode of execution above described. On the contrary, many alterations and modifications may sug gest themselves to those slrilled in the art without departing from the scope of my iniention as pointed out in the claims, it being understood that the term grinding used in the claims means reducing the horn to a powder by the friction of a single grinding surface, against which the horn is pressed.

Having thus described my invention, what I claim is z The improved method of comminuting raw horn which consists in abrading and thus wearing off the horn in the presence of water by means of abrasive members, thereby producing a fine muddy substance.

In testimony whereof I affix my signature.

DR. FRANZ THOMAS.