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Publication numberUS25819 A
Publication typeGrant
Publication dateOct 18, 1859
Publication numberUS 25819 A, US 25819A, US-A-25819, US25819 A, US25819A
InventorsMebbitt Goodman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Machine for cbushing quartz
US 25819 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

2 Sheets-Sheet 1. M. GOODMAN.

Quartz CruSher. No. 25,819. Patented Oct. 18, 1859.

Witnesses: Inventor:

Sh t2. M. GOODMAN. 2Sheets ee Quartz Crusher.

Patented Oct. 18, 1859.

1m: enter: WW




Specification of Letters Patent No. 25,819, dated October 18, 18 59.

To all whom it may concern:

Be it known that I, MERRITT GOODMAN, of Whitlocks, in the county of Mariposa, State of California, have invented a new and useful Machine for Crushing Quartz Rock or any other Hard Substance in Metallic Combination, called the Revolving Mor tar-Stamp; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a part of this specification, in which Figure 1 is a perspective view, A being a hollow stamp shaft, B a tappett; O, O, the cams; D the throat or hopper to receive the ore. E, E, E, E are the guides to prevent the stamp from revolving. F is a ward in combination with the guides. I is a revolving mortar. J is a crown wheel with a pin ion wheel meshing in. L is a drum on the pinion shaft. M is a large drum on the cam shaft. G is a screen or grate. II II are circular troughs to hold quicksilver and receive and pass off the pulvus.

Figure 2 is a transverse section. K K is the upper portion of the stamp. L L is the lower port-ion of the same. N is a circular amalgamating trough to be placed inside of the battery. O is the outside flange of the mortar to carry the drip or pulvus into the circular troughs, the remaining letters corresponding and describing as in Fig. 1.

The nature of my invention consists in connecting a stamp and shaft with an aperture large enough to pass the ore from a hopper connecting with said aperture, at pleasure anywhere on said shaft, the aperture extending from the hopper through the shaft to the place of stamp L, the stamp shaft should be provided with a movable tappet B to be elevated by two parallel cams C, fixed on a horizontal shaft with common guides E E and wards F, to regulate the elevation and fall, also sufliciently strong to hold, the shaft, and prevent the stamp from revolving, or change except upward and downward.

The mortar I is one entire piece of iron somewhat of the figure of a funnel constructed for one stamp only, the upper portion has a flange O for carrying off the drip or pulvus into the circular troughs H. The lower portion is tapered down according to its size and rests in a metallic boX. Near the base a crown wheel to give it revolving power, conveniently near and under the circular troughs as the construction will admit is a large bearing to hold the mortar in an upright position. The mortar is made to revolve by a pinion wheel meshing into the crown wheel. The pinion wheel is fastened on a horizontal axis provided with drum L, which is revolved by a band connecting with a larger drum M, fixed to the cam shaft. Two or more mortars can by any well known mechanical means be connected so as to revolve with the same drum or shaft. The upper portion of the mortar is encircled with a screen or grate so as to allow the pulvus to escape after being sufficiently pulverized. For dry crushing the screen or grate should flare outward with an angle of 45, so as to allow the coarse particles to fall back under the stamp, when water is to be used in crushing the circular trough N should be placed inside the battery at the foot of the screen and filled with quicksilver for the purpose of amalgamating the coarse gold which cannot pass through the screen, if it were not for this trough the gold would fall back under the stamp, and in a great measure would become reduced to an impalpable powder, and from the imperfect mode of amalgamating a large percentage of it would unnecessarily be lost. By commencing to save the gold as soon as it is free from the ore a large amount of it could be saved which would otherwise be lost if allowed to float oi as in the usual manner of crushing. Outside of the screen and under the flange O other circular troughs are placed for the purpose of amalgamating and carrying off the pulvus on to an inclined plane or any other apparatus that may be constructed.

The face of the mortar should contain a die so as to be replaced when worn.

The whole machine should be secured in a strong ordinary frame of wood or iron.

Among the principal advantages of the revolving mortar stamp may be mentioned, first, the attrition and grinding of the ore while the stamp is down; second, the great saving of power and the greater facility for amalgamating in the battery, by the means of having one stamp do the work of ten or twelve of the ordinary kind, the weight being concentrated in one body causes less friction; third, the falling of the stamp while the mortar is revolving at an appropriate velocity facilitates the pulverizing of combination with a hollow stamp and shaft the ore to an impalpable powder. Fourth, A described as aforesaid. for its simplicity and cheapness of construction, and less liable to get out of repair. 5 What I claim as my invention and desire Witnesses:

to secure as Letters Patent is ALFRED F. WASHBURN,

A revolving mortar I or stamping bed in B. B. HARRIS.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4770913 *May 23, 1986Sep 13, 1988Takao YamamotoFile covers, adhesive, release paper; for books, packages, files
Cooperative ClassificationB02C7/06