US191938A - Improvement in millstone-dressing machines - Google Patents

Improvement in millstone-dressing machines Download PDF

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US191938A
US191938A US191938DA US191938A US 191938 A US191938 A US 191938A US 191938D A US191938D A US 191938DA US 191938 A US191938 A US 191938A
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millstone
guideway
improvement
dressing
tool
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain

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  • Figure l of the drawings is a representation of a plan view of our millstone-dressing machine, and Fig. 2 is a side elevation thereof.
  • Fig. 3 is a transverse vertical sectional view, and Figs. 4 and 5 are detail viewsthereof.
  • Fig. 6 is an enlarged central vertical sectional view of the tool-holding device, and
  • Fig. 7 is an enlarged view of the drum with the top removed.
  • This invention is an improvement on the devices embraced in Letters Patent No. 185,125, dated December 5, 1876. It consists in certain improvements for more conveniently and effectually securing the dressing-machine to the millstones; also, in certain improvements in the mechanism for automatically causing the upper tool-carriage to travel across the machine, as hereinafter more fully set forth.
  • A designates the bed-plate of our millstone-dressing machine, and B an extension of the same, whichreaches quite across the stone, and is provided with a curved flat plate, B, at its front end.
  • the bed-plate A with its extension, B, in practice,is placed upon the stone to be dressed, so that the eye of the stone lies at or about the junction of the bed-plate and its extension, which, together, extend entirely across the face of the stone.
  • the bed-plate also acts as a straight-edge or level in dressing the stone, its length being equal to or greater than the diameter of the stone to be dressed, and extending entirely across it.
  • Said bed-plate supports a longitudinal guideway, that may be raised and lowered at Way, and provided with a cross-guideway, F,
  • Fig. 6 shows, in enlarged detail, the devices for holding the tool.
  • P designates a vertical adjusting rod or shaft, provided with a screw-threaded downward extension, P, which engages with said internally screw-threaded tool-holder, so as to adjust the same upward or downward, according to the direction in which the handwheel Q on the upper end of the said shaft P is turned.
  • the diamond is thus adjusted so as to cut deep or shallow, as desired.
  • the tool-holder is also automatically adjusted by means of a stud or short arm, R, which extends outward from rod P through a vertical slot, h, in the upper part of outer cylinder H.
  • Said stud or short arm R is provided at its outer end with a roller or rounded end, 7', that runs in a guideway or pivoted trough, S.
  • Said guideway S is supported by a standard, T, on carriageguideway F, and may be clamped thereto at any inclination, so as to automatically raise and lower the dressing-tool as said roller or end a" of arm R works backward and forward within it.
  • Said toolholder may be held against any such adjustment, and fixed in one position by means of a clamping-screw, U, which works through cylinder H and bears against adjusting-rod P. This adapts the machine to dress straight across the face of the stone without varying the depth of the furrows.
  • Guideway S may be inclined either to the right or left, according to the bevel of the furrows which are to be cut into the face of v the stone. It serves a double function-guiding the tool, as stated, and also supporting the same with the tool-holder and adjusting shaft or rod.
  • the spring employed for supporting said parts in the previously-patented device of 0rd, Oookson and Rastetter is thereby made superfluous.
  • the bedplate A provided with the extension B, having the curved flat plate B, flush with the lower face of the bed-plate, substantially as described, and for the purpose set forth.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Description

v ZSheetsSheet1. J. C. COOKSON & L.- RASTETTER.
MILLS'I'ONE DRESSING-MACHINE.
No. 191,938. Patented June 12,1877.
INVENTORIT. M a,
5 w ATTORNEY;
NVFETERS. PHOTO-LITHOGRAPHER, WASHINGTON. DJZ
UNITED STATES PATENT OFFICE.
JOHN o. oooKsON AND LOUIS EAsTETTEE, 0F FORT WAYNE, INDIANA,
ASSIGNORS TO JOHN OEEE, 0F sAME PLACE.
IMPROVEMENT IN MILLSTONE-DRESSIYNG MACHINES.
Specification forming part of Letters Patentllo. l9L93S, dated June 12, 1877; application filed March 31, 1877.
To all whom it may concern Be it known that we, JOHN, C. GOOKSON and LOUIS RASTET'IER, of Fort Wayne, in the county of Allen and State of Indiana, have invented a new and valuable Improvement in Millstone-Dressing Machines; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and fignres of reference marked thereon.
Figure l of the drawings is a representation of a plan view of our millstone-dressing machine, and Fig. 2 is a side elevation thereof. Fig. 3 is a transverse vertical sectional view, and Figs. 4 and 5 are detail viewsthereof. Fig. 6 is an enlarged central vertical sectional view of the tool-holding device, and Fig. 7 is an enlarged view of the drum with the top removed.
This invention is an improvement on the devices embraced in Letters Patent No. 185,125, dated December 5, 1876. It consists in certain improvements for more conveniently and effectually securing the dressing-machine to the millstones; also, in certain improvements in the mechanism for automatically causing the upper tool-carriage to travel across the machine, as hereinafter more fully set forth.
In the accompanying drawings, A designates the bed-plate of our millstone-dressing machine, and B an extension of the same, whichreaches quite across the stone, and is provided with a curved flat plate, B, at its front end.
The bed-plate A,with its extension, B, in practice,is placed upon the stone to be dressed, so that the eye of the stone lies at or about the junction of the bed-plate and its extension, which, together, extend entirely across the face of the stone. By this construction several advantages are attained, a more extended and firmer bearing is secured, and oscillations of the bed-plate prevented.
The bed-plate, with its extension, also acts as a straight-edge or level in dressing the stone, its length being equal to or greater than the diameter of the stone to be dressed, and extending entirely across it.
Said bed-plate supports a longitudinal guideway, that may be raised and lowered at Way, and provided with a cross-guideway, F,
'in which runs the upper tool-carriage Gr, carrying the outer vertical cylinder H of the toolholding mechanism. Said cylinder extends down through said carriages E and G to the middle opening of the bed-plate. Said upper carriage G is moved backward and forward in said guideway F by means of a screwtbreaded shaft, I,whicl1 is journaled in a lug, F, on said guideway F, and operates a nut, G, on said upper carriage G. Said shaft is provided at its outer end with a drum, J ,which has a detachable cover" or cap, J, to which is pivoted a spring-pressed cam or dog, K, that bearsagainst the inside of the rimof said drum. When said cover J is turned in one direction the said dog engages with and turns said drum, rotating said screw-threaded shaft,
to said cover or cap J, its base being adaptedto engage, when turned in either direction, with a small block, j, formed on said cover, thereby turning the latter. This turning is automatically eiiected by the engagement of said hanging arm with a stud,-m, on a verticallyadjustable plate, M, attached to said bed-plate. By the operation of the above devices carriage G is caused automatically to pass in its guideway F across guideway 0 step by step, each outward journey on said guideway causing it to move transversely a certain distance. Itis brought back by a crank, N, on said screw-threaded shaft.
Fig. 6 shows, in enlarged detail, the devices for holding the tool. The outer cylinder H,
already described, is provided near its lower end, on the inside, with a stud or guide-pin, h, which sets into a vertical guide-groove on the outside of an internally screw-threaded toolholder, 0. P designates a vertical adjusting rod or shaft, provided with a screw-threaded downward extension, P, which engages with said internally screw-threaded tool-holder, so as to adjust the same upward or downward, according to the direction in which the handwheel Q on the upper end of the said shaft P is turned. The diamond is thus adjusted so as to cut deep or shallow, as desired.
The tool-holder is also automatically adjusted by means of a stud or short arm, R, which extends outward from rod P through a vertical slot, h, in the upper part of outer cylinder H. Said stud or short arm R is provided at its outer end with a roller or rounded end, 7', that runs in a guideway or pivoted trough, S. Said guideway S is supported by a standard, T, on carriageguideway F, and may be clamped thereto at any inclination, so as to automatically raise and lower the dressing-tool as said roller or end a" of arm R works backward and forward within it. Said toolholder may be held against any such adjustment, and fixed in one position by means of a clamping-screw, U, which works through cylinder H and bears against adjusting-rod P. This adapts the machine to dress straight across the face of the stone without varying the depth of the furrows.
Guideway S may be inclined either to the right or left, according to the bevel of the furrows which are to be cut into the face of v the stone. It serves a double function-guiding the tool, as stated, and also supporting the same with the tool-holder and adjusting shaft or rod. The spring employed for supporting said parts in the previously-patented device of 0rd, Oookson and Rastetter is thereby made superfluous.
What we claim as new, and desire to secure by Letters Patent, is-
1. In a millstone-dressing machine, the bedplate A, provided with the extension B, having the curved flat plate B, flush with the lower face of the bed-plate, substantially as described, and for the purpose set forth.
2. The combination of cylinder H, having guide-stud h, grooved screwthreaded tool- .holder 0, adjusting-rod P, provided with the arm R, having roller 1', and guideway S, substantially as and for the purpose set forth.
3. The combination of cylinder El, having guide-stud h, grooved screw-threaded toolholder 0, adjusting-rod P, arm R, guideway S, and clamping-screw U, substantially as described, and for the purpose set forth.
4. The combination of cylinder H, having guide-stud h, with grooved screw-threaded tool-holder O and adjusting rod or shaft 1?, substantially as and for the purpose set forth.
5. In a millstone-dressing machine, the combination of the lower guideway pivoted at one end, with a cam-shaft journaled across the bedplate below the other end of said guideway, substantially as and for the purpose set forth.
In testimony that we .claim the above we have hereunto subscribed our names in the presence of two witnesses.
JOHN C. OOOKSON. LOUIS RASTETTER.
Witnesses:
JAMES E. GRAHAM, MART. V. B. GOTSHALL.
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