US1044575A - Grinding-machine. - Google Patents

Grinding-machine. Download PDF

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Publication number
US1044575A
US1044575A US64757711A US1911647577A US1044575A US 1044575 A US1044575 A US 1044575A US 64757711 A US64757711 A US 64757711A US 1911647577 A US1911647577 A US 1911647577A US 1044575 A US1044575 A US 1044575A
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grinding
wheel
slide
grinding plate
plate
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US64757711A
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Percy Hubert Root
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/16—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs

Definitions

  • This invention relates to grinding machines of the type which includes a rotary grinding plate or disk, and a work holder which presses the work down onto the plate and is reciprocated to distribute the wear evenly over the grinding surface,-machines of this type being especially adapted for grinding knives, blades of sheep and horse clippers and similar articles required to be dressed to a flat surface.
  • the invention relates to mechanism for supporting and reciprocating the work holder and has for its object to provide in a grinding machine of this type a reciprocating mechanism for the work holder which is efficient, and simple in construction.
  • a further object is to provide a reciproeating mechanism which enables th-e length of stroke to be very readily adjusted to adapt the machine to work of different sizes.
  • Figure 1 is a ⁇ top plan view of a machine constructed in accordance with my invention.
  • Fig. Q is a side view of the same; and
  • Fig. 3 is a detail view partly in section along the line 3-3 of Fig. 2.
  • 10 represent-s a rotary grinding plate or disk which is adapted to be provided on its upper face with a grinding paste for grinding the knives and blades.
  • the plate 10 is secured to the upper end of a vertical driving spindle 11 which is journaled in bearings 12, 12, of a frame designated, as a whole, by the reference character 13.
  • rlhe vertical spindle and grinding plate are rotated by mechanism including bevel gearing 1e and a horizontal.
  • shaft 15 which may be driven in any suitable manner, but in this case is provided with tight and loose pulleys 16, so ward by the spring, causing that it may be belt driven.
  • rlhe shaft 15 may be provided with an emcry wheel 17 which is adapted to rough grind the articles before being finished on the grinding plate 10. ⁇ When the articles are being ground on the emery wheel, they are supported on a suitable rest 18.
  • a pair of arms or brackets 19 are secured to the frame and project upwardly above the grinding plate 10 at diametrically opposite sides thereof, and at the upper ends of these arms are journaled rollers Q0 which constitute abutments for a slide or slide bar Q1 which extends across the plate above the same, and is designed to support the work.
  • rlhis slide which is in the form of a flat bar has secured to its under side a spring 2Q, the free ends of which tend to spring up and to lie against the lower face of the bar, but are designed to be pressed yieldingly downward by adjustable thumb screws 23 which pass through the har on opposite sides of its center.
  • At the ends of this spring are carried any suitable holders Q11 for the work to be ground, each of said holders being preferably pivoted. to the spring, so that the work held by it can accommodate itself to the surface of the grinding plata-the work which is carried by these holders being shown at 25.
  • the mechanism for reciprocating the slide and consequently the work holders and work forms the principal part of the present invention.
  • I employ the grinding plate 10 as a friction drive wheel to rotate a wheel 26 which is arranged preferably in a vertical plane or at right angles to the grinding plate 10, and engages the same at a distance from its center.
  • the grinding plate makes three or more revolutions to each revolution of the driven wheel 26.
  • This wheel 26 is mounted upon a stud 27 which extends into a suitable journal 28 of a bar 29 which also extends across the grinding plate 10 ⁇ above the same substantially parallel to the slide 21.
  • This bar is pivoted at one end by means of a screw 30 to one of the arms or brackets 19, and at its opposite end is connected with the opposite arm or bracket 19 through the medium of a spring 31 which is arranged between the free end of the bar 29 and a clip 32 carried by a bolt or screw 33 extending loosely through a slot of the bar 29 into the bracket 19, so that the bar is pressed downthe driven wheel 26 to be held in yielding rictional engagement with the driving plate 10.
  • a spring 31 which is arranged between the free end of the bar 29 and a clip 32 carried by a bolt or screw 33 extending loosely through a slot of the bar 29 into the bracket 19, so that the bar is pressed downthe driven wheel 26 to be held in yielding rictional engagement with the driving plate 10.
  • the driven wheel 26 is provided with a number of holes or sockets 34 which are located different distances from the center of the wheel, and in one of these openings is placed a pin carrying a roller 35 which works loosely in the vertical slot of an upright member 36 which is secured to the slide 2l at its center.
  • a pin carrying a roller 35 which works loosely in the vertical slot of an upright member 36 which is secured to the slide 2l at its center.
  • the articles to be ground are attached to the holders and are pressed against the grinding plate by means of the screws 23 and spring 22, and the rot-ation of the grinding plate causes the sliding bar to reciprocate so as to carry the work in and out over the grinding plate,-the range of movement being sufficient to bring the whole working surface of the grinding plate into use, thereby maintaining the grinding plate true to its original surface.
  • the roller 35 is placed in a hole of the wheel 26 nearer the center, thereby reducing the length of stroke of the sliding bar and avoiding the danger of the blades being projected beyond the periphery of the grinding plate and engaging the brackets 19.
  • a frame In combination in a grinding machine, a frame, a rotary grinding plate, a driving spindle support-ing the same, a work holding slide arranged at one side of the plate, and mechanism including a friction drive wheel in engagement with the grinding plate for reciprocating said slide.
  • a rotary grinding plate In a grinding machine, a rotary grinding plate, a vertical driving spindle supporting the same, a work holding slide arranged above the plate, and means for reciprocating the slide comprising a wheel in frictional engagement with the grinding plate and having an operative connection with the slide, a support for said wheel, and means acting on said support to press the wheel yieldingly onto said grinding plate.
  • a rotary grinding plate In combination in a grinding machine, a rotary grinding plate, a vertical spindle supporting the same, a work holding slide arranged above the plate, and means for reciprocating said slide comprising a wheel in rictional engagement with the grinding plate, a stud projecting outwardly from said wheel, a slotted member carried by said slide and engaged by said stud.
  • a rotary grinding plate In combination in a grinding machine, a rotary grinding plate, a vertical spindle supporting the same, a work holding slide arranged and supported above the grinding plate, means for reciprocating the slide comprising a wheel in frictional engagement with the grinding plate, a support for said wheel having means for pressing the wheel yieldingly into engagement with the grinding ⁇ plate, said wheel having a plurality of openings arranged dierent distances from the center thereof, a roller supported in one of said openings, and an upright member on the slide provided with a vertical slot which receives said roller.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Description

VILBL COPY P. H. ROOT. GRINDING MACHINE. APPLIGATION FILED SEPT. 5, 1911.
1,044,575. Patented Nov. 19, 14912.
(,1 il fyi.-
SATS
vltl'ldl ATENT UFFlC.
PERCY HUBERT ROOT, OF PLYMOUTH, OHIO.
GRININGr-MACHlNE.
Lili-1h57 5 llatcntedNov. 19, 1912.
serial No. 647,577.
T o all whom it 'may concern.
Be it known that l, Pnnor ll. Boor, a citizen of t-he United States, residing at Plymouth, in the county of Richland and State of Ohio, have invented a certain new and useful improvement in Grinding-Machines, of which the following is a full, clear, and exact description.
This invention relates to grinding machines of the type which includes a rotary grinding plate or disk, and a work holder which presses the work down onto the plate and is reciprocated to distribute the wear evenly over the grinding surface,-machines of this type being especially adapted for grinding knives, blades of sheep and horse clippers and similar articles required to be dressed to a flat surface.
More particularly, the invention relates to mechanism for supporting and reciprocating the work holder and has for its object to provide in a grinding machine of this type a reciprocating mechanism for the work holder which is efficient, and simple in construction.
A further object is to provide a reciproeating mechanism which enables th-e length of stroke to be very readily adjusted to adapt the machine to work of different sizes.
riChe above and other objects are accomplishecl by my invention, which may be briefly summarized as consisting in certain novel details of construction and combination and arrangements of parts which will be described in the specification and set forth in the appended claims.
ln the accompanying sheet of drawings, Figure 1 is a` top plan view of a machine constructed in accordance with my invention. Fig. Q is a side view of the same; and Fig. 3 is a detail view partly in section along the line 3-3 of Fig. 2.
Referring now to the drawings, 10 represent-s a rotary grinding plate or disk which is adapted to be provided on its upper face with a grinding paste for grinding the knives and blades. The plate 10 is secured to the upper end of a vertical driving spindle 11 which is journaled in bearings 12, 12, of a frame designated, as a whole, by the reference character 13. rlhe vertical spindle and grinding plate are rotated by mechanism including bevel gearing 1e and a horizontal. shaft 15, which may be driven in any suitable manner, but in this case is provided with tight and loose pulleys 16, so ward by the spring, causing that it may be belt driven. rlhe shaft 15 may be provided with an emcry wheel 17 which is adapted to rough grind the articles before being finished on the grinding plate 10. `When the articles are being ground on the emery wheel, they are supported on a suitable rest 18.
A pair of arms or brackets 19 are secured to the frame and project upwardly above the grinding plate 10 at diametrically opposite sides thereof, and at the upper ends of these arms are journaled rollers Q0 which constitute abutments for a slide or slide bar Q1 which extends across the plate above the same, and is designed to support the work. rlhis slide which is in the form of a flat bar has secured to its under side a spring 2Q, the free ends of which tend to spring up and to lie against the lower face of the bar, but are designed to be pressed yieldingly downward by adjustable thumb screws 23 which pass through the har on opposite sides of its center. At the ends of this spring are carried any suitable holders Q11 for the work to be ground, each of said holders being preferably pivoted. to the spring, so that the work held by it can accommodate itself to the surface of the grinding plata-the work which is carried by these holders being shown at 25.
The mechanism for reciprocating the slide and consequently the work holders and work forms the principal part of the present invention. To reciprocate the slide 21, I employ the grinding plate 10 as a friction drive wheel to rotate a wheel 26 which is arranged preferably in a vertical plane or at right angles to the grinding plate 10, and engages the same at a distance from its center. Preferably the grinding plate makes three or more revolutions to each revolution of the driven wheel 26. This wheel 26 is mounted upon a stud 27 which extends into a suitable journal 28 of a bar 29 which also extends across the grinding plate 10` above the same substantially parallel to the slide 21. This bar is pivoted at one end by means of a screw 30 to one of the arms or brackets 19, and at its opposite end is connected with the opposite arm or bracket 19 through the medium of a spring 31 which is arranged between the free end of the bar 29 and a clip 32 carried by a bolt or screw 33 extending loosely through a slot of the bar 29 into the bracket 19, so that the bar is pressed downthe driven wheel 26 to be held in yielding rictional engagement with the driving plate 10. This construction is illustrated in Fig. 3. The driven wheel 26 is provided with a number of holes or sockets 34 which are located different distances from the center of the wheel, and in one of these openings is placed a pin carrying a roller 35 which works loosely in the vertical slot of an upright member 36 which is secured to the slide 2l at its center. Thus through the trictional engagement of the grinding plate l0 and the wheel 26, said wheel is rotated at the proper speed, and as it is rotated the pin and roller 35 serves as a crank which, by its engagement with the slotted member 36, causes the slide to be reciprocated, the throw of the slide in each direction being equal to the distance of the center of the roller 35 to the center of the wheel 26. This mechanism for reciprocating the slide is very efficient and reliable and at the same time is inexpensive and simple in its construction.
The articles to be ground are attached to the holders and are pressed against the grinding plate by means of the screws 23 and spring 22, and the rot-ation of the grinding plate causes the sliding bar to reciprocate so as to carry the work in and out over the grinding plate,-the range of movement being sufficient to bring the whole working surface of the grinding plate into use, thereby maintaining the grinding plate true to its original surface. Vhe-n wider blades are to be ground, the roller 35 is placed in a hole of the wheel 26 nearer the center, thereby reducing the length of stroke of the sliding bar and avoiding the danger of the blades being projected beyond the periphery of the grinding plate and engaging the brackets 19.
I-Iaving thus described my invention, what I claim is:
l. In combination in a grinding machine, a frame, a rotary grinding plate, a driving spindle support-ing the same, a work holding slide arranged at one side of the plate, and mechanism including a friction drive wheel in engagement with the grinding plate for reciprocating said slide.
2. In a grinding machine, a rotary grinding plate, a vertical driving spindle supporting the same, a work holding slide arranged above the plate, and means for reciprocating the slide comprising a wheel in frictional engagement with the grinding plate and having an operative connection with the slide, a support for said wheel, and means acting on said support to press the wheel yieldingly onto said grinding plate.
3. In combination in a grinding machine, a rotary grinding plate, a vertical spindle supporting the same, a work holding slide arranged above the plate, and means for reciprocating said slide comprising a wheel in rictional engagement with the grinding plate, a stud projecting outwardly from said wheel, a slotted member carried by said slide and engaged by said stud.
t. In combination in a grinding machine, a rotary grinding plate, a vertical spindle supporting the same, a work holding slide arranged and supported above the grinding plate, means for reciprocating the slide comprising a wheel in frictional engagement with the grinding plate, a support for said wheel having means for pressing the wheel yieldingly into engagement with the grinding` plate, said wheel having a plurality of openings arranged dierent distances from the center thereof, a roller supported in one of said openings, and an upright member on the slide provided with a vertical slot which receives said roller.
In testimony whereof, I hereunto atlix my signature in the presence of two witnesses.
PERCY HUBERT ROOT.
Vitnesses:
O. S. EARNEST, D. GLICK.
Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.
US64757711A 1911-09-05 1911-09-05 Grinding-machine. Expired - Lifetime US1044575A (en)

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