US924014A - Grinding-mill. - Google Patents

Description

T. L. & T. J. STURTEVANT.

GRINDING MILL.

APPLICATION FILED OUT. 5, 1905.

Patented June 8, 1909.

wzmaaea/ 'UNKTTED a Y I in mine i GRINDXNG-IEILL.

No., 924,01e.

at Quincy and Wellesley, in the county of Norfolk and State of Massachusetts, have invented or discovered certain new and useful Improvements in Grindingdliills, of which the following is a specification, reference be ing had therein to the accompanying drawmgs. r I

This invention relates to that class of grinders or grinding mills in which a rotating disk or late cooperates with. a stationary disk or p ate, the material to be ground being fed to the central portions of said disks or plates so that as it is reduced it works out-- ward therefromv In this class of grinders, and particularly where metallic grinding disks or plates are employed, the said disks or plates, when in use, become out or scored in circles orjrin s which wear dee er and deeper, so that iine grinding soon iiecomes impossible, and the grinding disks or plates have to be discarded although not nearly worn out.

This invention has for its object to remedy the difhculty referred to by so mounting one of the grinding disks or plates that it may be adjusted in a plane which is transverse to the axis of the rotating disk or plate, or to the axis of the shaft by which said rotating disk or plate is carried. In effecting such transverse adjustment of one of the grinding disks or lates the stationary disk or plate is referab y mounted for such adjustment. .n the preferred form of our invention, however, the stationary disk or late mounted on a pivoted or swinging v oer-like part hinged toe vertical pin or bolt, and means are rovided for raising or lowering the said doorike part to adjust the said stationary disk or plate carried thereby in a, plane transverse to the axis of the rotating 7 late, and thereby change the center of one p ate relative to the other, so that the tendency of the plates to wear in grooving circles may be avoided. Of course the adjustable plate ma be so mounted as to be moved horizontal y, instead of verti cally, in this adjustment, if desired. The door-like part on which the adjustable plate is mounted-can be swung aside when access to the interior portion of the mill or the grinding chamber 'is desired.

Specification 03? Letters Eatent.

Application filed october 6, race. No. $181,404.

Patented June 8, 3.909.

in the accompanying drawings, Figure 1 is a longitudinal section of a grinder, embodying the presentinvention, and Fig. 2 is an end view thereoi looking from the right of Fig.

Referring to the drawings, 12 denotes the frame of the machine on which is mounted the 'iorizontal driving shaft 13 to which is d the wheel or disk 14. carrying the rog grinding 15 rotating in a vertical plane and attached to said Wheel or disk in any suitable manner, as by means of bolts 16. The shaft 13 is adjustable longitudinally to secure the desired fineness of the output of the mill, ins welhknown manner, by means of a screw 17 provided with a hand Wheel 18 and the said shaft is also furnished with the usual fast and loose pulleys 19 and 20.

The frame 12 is provided with cars 21 to which attached spin or bolt 22 serving as a pivot or hinge for the door-like part 23 having ears through which the said pin or bolt passes. liiounted on the hinged or doorlike part 23 the vertically disposed and normally stationary grinding disk or plate 25, and the said hinged door-like part 23 is provided with a feed opening or hopper 26 opening downward into the "eye of the mill, or the central iortions of the grinding disks or plates. 'i e door-like part 23 is provided at its top with an arm 27 furnished with an adjusting screw 28 abutting against the top of the mill casing 29, said screw being preferably provided with a hand wheel 30, and with a set nut 31. The hinged or doorlike part 23 is pretoralidy provided with a suitable catch or latch 32 engaging portion of the stationary frame and serving to hold the said hinged part closed.

From the foregoing it will be obvious that an adjustment of the stationary disk or plate 25, transverse to the center of the driving shaft 13, or transverse to the axis of the ro tating disk or plate, may be, ellccted by means of the screw 28 serving to raise or lower'thc hinged door-like part 23, on which the said stationary or non-rotating disk or plate is mountcd,so as to change the center of one of the grinding disks or plates relative to the other, for the purpose ol' bringing dil iercnl portions ol said plates opposite each other and thereby evenly distriliuiting the wear and preventing the adjacent faces of the said disks or plates from becoming scored or grooved in circles. By thus adjusting one of the said grinding lates or disks relative to the other their Wor ing lives will be very considerably extended and the ex ense of frequent renewals of these plates wi 1 therefore be avoided.

Having thus described our invention we claim and desire to secure by Letters Patent:

ing a section adjustab 1. In a grinding machine, the combination with a rotating disk or late, of a casing havi; transversely to the axis of rotation of said rotating disk or plate, a stationary disk carried by said adjustable section, and an adjusting screw for moving said adjustable section transversely to the said axis of rotation of said rotating disk or ate. p 2. In a grinding machine, the combination with a rotating disk or late, of a casing having a section adjustablb transversely to the axis of rotation of said rotating disk or plate, a stationary disk carried by said adjustable section, and means for adjusting said adjustable section.

3. In a grinding machine, the combination with'a rotating disk or plate, of a stationary disk or plate, a casing having a hinged or pivoted part on which said stationary disk or plate is mounted, and means for adjusting the said hinged or pivoted part transversely to the axis of the said rotatmg disk or plate.

5. In'a grinding mill, the combinatioiT with a rotating grinding disk or plate and a casing within which the same is mounted, of a door-like art closing the end of the chamber formed y the said casing and mounted on a vertical hinge or art so as to swing horizontally, said doorike part having a horizontally extending arm overla ping said casing, a stationary grinding dis or platemounted on said door-like part, and a screw tapped in said arm and abutting against said casing for adjusting the said door-like part vertically ofii'ts hinge or pivot for the purpose of varying, the eccentricity of the said stationary disk or plate relative to" the said rotating disk or plate.

In testimony whereof we afiix our signatures, in presence of two witnesses.

THOMAS LEGGETT STURTEVANT. THOMAS JOSEPH STUR'lEVANT. Witnesses:

L. H. STURTEVANT, E. M. HILTON.

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