US1177199A

US1177199A - Grinder.

Info

Publication number: US1177199A
Application number: US5172015A
Authority: US
Inventors: William A Marschke; Fredrich W Marschke
Original assignee: STANDARD MACHINE AND ELECTRIC CO
Current assignee: STANDARD MACHINE AND ELECTRIC CO
Priority date: 1915-09-20
Filing date: 1915-09-20
Publication date: 1916-03-28
Anticipated expiration: 1933-03-28

Description

W. A. & F. W. MABSCHKE. GRINDER.

APPLICATION FILED SEPT- 20. H5.

1,177,199. Patented Mar. 28, 1916.

2 SHEETS-SHEET I.

w. A. & F. w. MARSCHKE.

GRINDER.

APPLICATION F[LED SEPT. 20. 1915.

Patented Mar. 28,1916.

2 SHEETSSHEET 2.

Indiana olis,

' grinding wheel; and we UNITED 'STATES PATENT OFFICE.

INDIN, A CORPORATION Ol INDLNA.

amninnn.

8peclflcation of Letters Patent.

Patented Mar. 28, 1916.

v Application filed Septenhber so, 1915. Serialllo. 51,720.

To all whom zt ma'y comem:

Beit known that We, WILLIAM A. MARSCHKE and FREDRICH W. MARSCHKE, citizens of the United States, residing at in the county of Marion and State Indiana, have invented' a new and useful Grinder, of which the following is a .specification.

It is the object of our invention to minimize the sparks which .cling to and are thrown out from the surface of an abrasive grinding wheel.

In carrying out our invention, we provide au inclosing casing for the abrasive grinding wheel, and maintain a continuous suction from this casing so that sparks which are produced by the rinding are largely or wholl drawn out y such suction instead of ing thrown Out through the opening at which the gr'inding wheel is exp0sefi for the application of the articles bem ground; and we mount this casing slida ly, ;so that as the gfinding wheel is worn awy the casing can be slid to maintain the opening into the casing for the application of the articles to be ground as close to the grinding wheel as desired; and wemount in such casing at the upper end of the aforesaid opening a deflector plate which is swung inward as the casingis moved to compensate for the wearing of the grinding wheel, so that the deflector platealways remains close to the surface of the provide an air passage on the opposite side of such deflector plate from such opening,

for producing a current of air for cooling any sparks which are carried around by the grinding wheel;

' and we prefera'bly provide a structure in eleyation,

portion of one of the grinding wheels and which a single motor drives two grinding.

wheels each of which is provided with a casing separately adjustable as above de'' scribed, with both casings provided With a. single suction-producing means. The accompanying drawings illustrat our invention.

Figure 1 is a side elevation .of a grinding device embodying our invention, there being two grinding 'wheels driven by a single motor; Fig. 2 is a front elevation of such grinding device; Fig. 3 is an enlarged side in partial section, of the upper its casing, showing mechanisni for adjusting of Fig. 4; and

within a casing Stem 19 of which leads to tr1fugal fan 20, driven by a belt'21 from a t-h e deflector plate as the casing is slid; Fig. 4 1S a section on the lines 44 of Figs. 2 and 5; Fig. 5 is a front elevation of the parts shown in Fig. 4, with the lower partin section; Figs. 6 and 7 are side elevations of grmders embodying a modified form of the mechanm for working the deflector plate; Fig. 8 is a redued section on the line 88 Fig. 9 is a perspective vieW of the main part of the casing, with the upper part cul: away.

The grinding device consists 10 supporting a table 11 mounted a motor electric motor, which has a shaft 13 project-.

ing at both ends and having mounted on each prmectmg end an abrasive grinding wheel 14. Each grinding'wheel 14 is located 15, which rests upon the table 11 and is mounted to slide forwardly and rearwardly on such table, being clainped in any desired position by a clampin screw 16 and guided in its m'ovements by a s ide 22.

Each casing is open at the bottom andcommunicates through an opening 17 in the table 11 With a pipe 18. The two pipes 18 are the upper ends of a Y-shaped pipe the the inlet of a censhaft 13, so that the fan 20 maintains a suction in both casings 15. Each casing 15 is eut away at the front to provide an opening 25, for the application of articles to be ground to the grinding wheel 14. At the bottom of this opening is the usual tool rest 26, which.is adjustably suppbrted in the casing 15. At the top .of the opening 25, but under the. casing'l5, is a deflector plate 27, Which is pivotally mounted at its upper end on a pivot pin 28 in the casing 15 and at its lower end is provided with an inwardly projecting fiange 29 which just clears the periphery of the grinding wheel 14. The deflector plate 27 is provided with an outwardly fiared portion 30 around the pivot pin 28 for providing an air passage between the outside air and the periphery of the grinding wheel 14 abovethe fiange 29.

As the grinding wheel 14 is used, and wears away, thecasing 15 is slid rearward, to'expose the desired portion of the grinding .wheel through the opening 25. This rearis always maintained close to the periphery of the grinding wheel 14. This may be ac-- complished in various ways. In the arrangement shown in F igs. 1 t0 5. inclusive, a ring 35 is clamped on the adjacent bearing 36 of the motor,12, a by a clamping screw 37, and this ring 35 is provided with a horizontal rack 38. A pinion 39 is mounted on a pivot pin 40 on the casing 15, sothat it meshes with the rack 38. A crank pin 41 on the pinion 39 is connected. by a link 42 to a downwardly projecting arm 43 from the deflector plate "27; Thus as the casing 15 is slid rearward, the pinion 39 rolls' on the rack 38, and the rotary movement of the crank pin 41 causes the deflector plate 27 to be swung downwardly so that the inner edge of the .flange 29 is maintained in close proximity to the periphery of the grinding wheel 14.

In the modification shown in Fig. 6, the

defiector plate 27 is connected by a link 45 to the upper end of a lever 46, the lower end of which is pivoted on a fixed support 47, and an intermediate point of which extnds loosely through a -transverse opening in a pivot pin 48 mounted onthe casing-l5. As the casing is inoved rearward, the upper end of the lever 46 is moved more rapidly than the casing and the link 45 thus tilts the deflector plate 27 to draw the flange 29 close to the periphery of the grinding wheel 14.

In the modification shown in Fig. 7, an arm 50 is pivoted within and near the bottoin ofthe casing 15, near the front thereof, and rests upon the forward edge of the opening 17 in the table '11. This plate isconnected by a link 51 to the deflector plate 27. As the casing 15 is slid rearward, the arm 50 slides downward into the opening 17, and by its weight, transmitted through the link 51, tilts the deflector plate 27 to bring the edge of the flange 29 toward the periphery of the grinding wheel 14.

In operation, the motor 12 drives the grinding wheels 14 and the an 20., The fan 20 sucks air into the casings 15 through the openings 25, and out of such casings through the openings 17. and the

pipes

18 and 19. The casings, 15 are adjusted so that the flanges 29 are close to the peripheral surfaces of the grinding wheels 14. As the articles are placed against the grinding wheels to be ground, and sparks are produced, the greateramount of the sparks are d1awn out of thecasings 15 by the action of the fan 20. If any sparks, however, are carried around by either wheel 14, such sparks are. in large part removed by the flange 29 of the deflector plate 27, and are cooled by the current of air passing through the opening provided b the flared portion 30. As either grinding Wheel 14 is worn tway, its casing 15 is slid rearward, and the fiange 29 is brought doser to the peripheral Surface of such wheel by such sliding. Fig. 3 shows in full and dotted lines respectively the relative positions of the casing and the defiector plate for the full-sized grinding wheel, shown in full lines, and for a very much reduced grinding wheel, shown in chain lines.

If desired, the inner surface of the casing 15 may be provided With one or more inwardly projecting flanges 60, which project toward the peripberal surface of the grinding wheel 14 and act to catch and deflect' some of the sparks Which may be carried around past the opening 17. One of such fianges 60 is shown in d'otted limes in Fig. 4.

The-casing 15 has the main portion 65, which. is on' the side toward the motor 12 and extends around the peripher of the grinding wheel 14, and a removable side 66 which is on that side of the grinding wheel 14 away from the motor 12. The deflecting plates 67 which guide the air into the opening 17 are on the main portion 65. Near their edges toward the removable side 66 these' deflecting plates are provided with notches 68, which receive a dove-tailed projection 69 onthe inner face of the removable side 66. This holds the lOwer part ofthe side-66 in place. The upper part of said side 66 is provided With two Spaced fingers 70, between which a pivoted bolt 71 may be swung, so that a winged nut 72 on such bolt may coperate with the 'fingers to hold the upper part of said side 66 against' the main part 65 of the casing 15. The removable side 66 is provided With an outwardly projecting cup portion 73 for fitting over the projecting portion of the motor shaft beyond the abrasive wheel 14. This cupshaped-portion is indicated horizontally, to permit the sliding of the ca. 2. By removing the side 66, the abrasive heel 14 is exposed, as for removal or replz. emnt.

We claim as our invention:

1. In combination, a rotatably mounted grinding wheel, a casing therfor, said casing having an opening for' admitting articles to'be ground and being slidabl mounted to slide in the *::lane of the grinding wheel t0 compensais. .or the wear of the grinding wheel, a deflect0r plate monted in said casing. and projecting into proximity to the periphery of the grinding wheel, and operating means for the d'eflectorplate for swinging it inward as the casing is slid to compensate for the wear on the grinding wheel.

2. In combination, a rotatably mounted grinding wheel, a casing theref0r, said casing having an"opening for admitting articles to be ground and being slidably mounted to slide as a unit in the plane of the grinding 'Wheel to compensate for the wear of the grinding wheel, and a deflector plate adjustv ably mounted in said casing and projecting into' proximity to the periphery of the grinding wheel, said deflector plate being adiustable relatively to the casing toward and from the periphery of the grinding wheel.

3. In combinatioii, a rotatably mounted compensate for the wear on the grinding wheel, saidcasing providing an opening for the passage of a current ofair on the other side of said deflector plate from said firstnamed opening.

4. In combination, a rotatably mounted grinding wheel, a casing therefor, said casing having an opening for admitting articles to be ground and being slidably mounted t0 slde in the plane of the grinding wheel to' compensate .for the wear of the grinding wheel, and a deflector plate adjustably mounted in said casing and projecting into proximity to the periphery of the grinding wheel, said casi ng providing an opening for the passage 01 a current of air on the other side of said deflector plate from said firstnamed opening.

5. In combination, a rotatably monted grinding wheel, a casing theref0r, said casing having an opening for admitting articles to be ground and beingslidably mounted to slide in the lane of the grinding wheel t0 compensate or the wear of the grinding wheel, a deflector plate mounted in said casing and projecting into proximity to the periphery of the grinding wheel, said Casing provding an opening for the passage of a current of air on the other side of said deflector plate fromsaid first-named opening.

6. In combination, a rotatably mounted grinding wheel, a casing theref.or, said casing having an opening for admitting articles t0 be'ground and being sldably mounted to slide in the plane of the grinding wheel t0 compensate for the wear of the grinding wheel, said casing.being open at the bottom, a plate on which said casing is supported for its sliding movement, said plate having an opening through it which registers with the opening in the bottom of the casing for all positions of the casing, and a suction device connected to the opening in the plate.

7. In combination, a rotatably mounted grinding wheel, a casing therefor, said casing having an opening for admitting articles to be ground and being slidably mounted t0 slide in the plane of the grinding wheel t0 compensate for the wear of the grinding wheel, a deflector plate pivotally mounted in said casing at one side of said opening and having at its free end a fiange projecting into proximity to the periphery Of the grinding wheel, and means operated by the sliding of the casing for adjusting said deflector plate so that the inner edge of said fiange always lies close to said periphery.

In witness whereof, we have hereunto set Our hands at Indianapolis, Indiana, this 18th day of September, A. Dione thousand nine hundred and fifteen.

WILLIAM A. MARSCHKE. FREDRICH W. MARSCHKE. Witnesses: l

HAROLD W. MARSCHKE, ELIZABETH H. MEIER.