US1671872A - Stone-cutting machine - Google Patents

Description

May 29, 1928, 1,671,872

E. R. PLAISTED STONE CUTTING MACHINE Filed Oct. 16, 1926 3 Sheets-Sheet l ld eZ/fifiazszd flaw/66 B yaw/142%.

ATTORNEYS.

May 29, 1928. r

E. R. PLAISTED 'STONE CUTTING MACHINE Filed 001;. 16, 1926 INV'BNTOR l: J1 I lazkd ATTORNEYS.

May 29, 1928.

STONE CUTTING MACHINE Filed-Oct. 16, 1926 3 Sheets-Sheet 3 :1 /9\ v I v o 0 7 I WITNESSES 79 d INVENTOR ha 4 W96 ATTORNEYS.

Patented May 29, 1928.

nmren stars EDGELL ROYCE PLAISTED, OF MONTPELI ER, VERMONT.

STONE-CUTTING MACHINE.

Application filed October 16, 1926. Serial No. 141,991.

The present invention is concerned with a machine for making any desired angle or cut in a block of stone. In a preferred embodiment of the machine, it includes a swinging carriage-track-carrying member mounted adjacent the work support. A cutter carriage 1s reciprocable along the track and the track carrier is preferably mounted for a. swinging or oscillating adjustment about an axis parallel to and spaced from its own major axis and lying without the horizontal and vertical planes of such major axis.

By virtue of this construction, when operating upon a block of stone, the cutter may make a cut in the stone either horizontally,

vertically, or at any intermediate angle, and the girder may be swung to shift the cutter from horizontal to vertical cutting position or vice versa without adjustment of the stone.

More general objects of the invention are to provide a stone cutting machine, of simple, practical construction, which will be rugged, durable and eflicient' in use, and which is capable of ready and convenient adjustment in accordance with the particular planes at which the stone is to be cut.

l/Vith the above noted and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts, as will be more fully hereinafter set forth and pointed out in the claim. The invention may be more fully understood from the following description in connection with the accompanying drawings, wherein Fig. 1 is a view partly in end elevation and partly in vertical section through the machine.

Fig. 2 is a top plan view of the machine.

Fig. 3 is a view in vertical section on the line 33 of 1.

Fig. 4 is an enlarged vertical section detail on the line 4t4 of Fig. 1.

Fig. 5 is a similar view showing the cutter support rotated through an angle of 90 and indicating in dotted lines an intermediate position of the cutter and its associated mechanism.

Fig. 6 is a fragmentary vertical sectional detail on the line 66 of Fig. 7.

Fig. 7 is a sectional detail on the line 77 of Fig. 6.

In the drawings 1 have used the reference character 10 to indicate a bed, or base, from opposite sides of one end of which, rise a pair of relatively heavy columns 11. Extending transversely across the base are a pair of tracks 12 embraced by channel irons 13 secured to the under face of a work carriage 14-. (larriage 14 is manually reciprocated along the tracks by turning a handwheel 15 connected to a screw 16 working in a threaded sleeve 17 depending from the bottom of the work carriage between the tracks.

The upper section l f of the work carriage 14 is preferably rotatable and mounts the work herein illustrated as a' block of stone 18.

Extending tranversely between the columns 11 and pivotally connected to each column adjacent its upper end is a girder 19 which constitutes the track-carrying member above referred to. Mounted for reciprocating movement along the girder is a cutter carriage deslgnated generally by the reference character 20. Means is provided for swingably or oscillatably adjusting the girder for shifting the cutter Wheel 2O from the vertical position of Fig. 3 to the horizontal position of Fig. 5, or to any intermediate position such. as indicated in dotted lines in Fig. 5. An important feature is an arrangement which permits mounting of the girder for swinging adjustment about an axis lying without the horizontal and vertical planes of its major axis and spaced at a considerable distance from the intersection of such planes, orin other words from said major axis.

One end of the girder 19, to wit: the left hand end thereof in Fig. 1, is bolted to a toothed sector plate 21, said sector plate being pivotally connected as by a bolt 22 to the upper end of a stationary plate 23 bolted at 2 1 to the adjacent column 11. The lower end of the plate 23 is curved substantially in conformity with the curve of the toothed edge of the sector plate 21, and locking means such for instance as the hooked bolt 25 may be used to clamp the swinging sector plate 21 to the stationary plate 23, thereby locking the sector plate and the girder connected thereto against swing ing movement about the bolt 22. The means for turning the sector plate about its pivot to adjust the girder has been indicated as a screw 26 operated by a handwheel 27. This screw has bearings at 28 in a bracket or platform 29 secured to the post 11 beneath the sector plate 21.

At the oppo ite or r ght head 1 d f the lit) machine in Fig. 1, a generally similar construction is employed, except that in this instance the girder is connected to and carried by the plate 32 hung from the pivot bolt 33 and clamping to the sector plate by means of the hook-bolts 25. With particular reference to Fig. 3 of the drawings, it will be seen that the aligned pivot bolts 22 and 33 permit swinging movementof the girder about an axis lying without the horizontal and vertical planes of the major longitudinal axis of the girder, such planes beingindicated in dot and dash lines in Fig. 3. It is alsoto'be noted that the pivotal axis of the girder is disposed at a point spaced a considerable distance from its major longitudinal axis.

The top ofthe girder 19 is laterally undercut to-form with a track or gib 35 guiding the sliding movement of the cutter carriage, whichilatter includes a slide member 36 reciprocable along the track in a manner about to be described. A screw 37' accommodated in a groove in the girder 19has a threaded connection with a depending lug 38 on the slide 36. At one end the screw is keyed to a gear, 39 disposed between plate 32 and sector 30, this gear meshing with a pinion 40 carried by reversing motor 41 supported in any suitable manner upon the girder 19. The reversingmotor. is arranged to operate throughthe gears-i0 and 39 andthe screw 37 to reciprocate the cutter carriage back and forth along the girder.

Before describing in detail, the cutter earriage and its adjustments, it may be well to note that the girder 19 preferably includes a pair of depending flanges 19 and 19 strengthened at intervals by transverse webs 19. The girder is extended at'19 to carr the motor 41. Flanges 19 and 19 are pref: erably of greatest width adjacent the center of the girder where the twisting strainsare greatest.

The girder must of course be strong enough to overcome these strains when the cutter carriage has been tilted to an overhanging position, and must-be locked against any materialvibration as the cutter carriage reciprocates back and forth over it. It may be noted that the particularmeans which I have shown for mounting the girder and looking it against adjustment are subject to awide variety of variations.

A slide member is adjustable transversely of;the slide member 36 of the cutter carriage, this adjustment being preferably effected by a hand wheel 51-on ascrew 52. A third slide member 53 is adjustable verticallyv on the slide 50, this adjustment being preferably by a hand wheel 54; on a screw 55. Slide 53 carries an electric motor 56 upon the armature shaft of-whioh the cutter disc 20 is mounted.

While the. operation of the machine will be generally understood from the foregoing description, it may be briefly summarized as follows. WVork carriage 14 is slidably adjustable along its tracks by a hand wheel.

15 and the work may be rotated to expose any desired face for engagement by the cutter due to the fact that the upper section of the work carriage is rotatable relatively to the lower sectionthereof. The girder has a swinging or oseillatable adjustment about the pivot bolts 32 and 33, this adjustment being effected by operating the hand wheel 27 and drivingthe sector 21 with the screw 26. To lock the girder against such adjustment, the hooked locking bolt 25 and a simi lar bolt 25 at the other side of the machine are used. The cutter itselfis mounted on the reciprocating carriage and is adjustable in planes parallel to both the horizontal and vertical planes of the major axis of its supporting girder.

This arrangement of parts permits a vertical cut to be made in the stone, and then a horizontal cut to be made in the stone, both ends being the'same distance from the vertical end face and the horizontal upper face of the stone, and the two cuts following each other without any necessity for adjusting the stone after-the original adj ustment has been made.

Such acutting operation on all prior machines would involve either an intermediate stone adjusting operation which takes considerable time, or the use of some construc tion in which the pivotal axis of: the girder itself was shiftable.

After the work and girder have been adjusted relatively to each other, and the slides of the cutter carriageproperly set, motors -11- and 56 are started, the former reciprocating the cutter, carriage back and forth along the girder and the latter: driving the cutter.

The terms horizontal and vertical planes of the major axis of the girder, have been used rather loosely in the foregoing specification, and the intended meaning of the terms may be explained as fol lows. By the vertical plane of the longitudinal axis I mean the plane which intersects such axis and bisects the upper or track face of the girder. By the horizontal plane of the major longitudinal axis, I mean the plane intersecting such axis at right angles to the above described vertical plane. It will of course be understood that in such positions of adjustment of the girder, these planes will not be in a strictly vertical or horizontal position. The terms are here used in order. toavoid undue wordiness in the specification and claim.

For the purpose otthis application I have discussed my invention in its application to the cutting; of stone, although it is-to be understood that such, treatment is purely illustrative and in no Way limiting. The

term girder as used both in the specifica Obviously, various changes and alterations might be made in the general form and arrangement of parts described Without departing from the invention. Hence I do not Wish to limit myself to the details set forth, but shall consider myself at liberty to make such changes and alterations as fairly fall Within the spirit and scope of the appended claim.

I claim:

In a stone cutting machine, a Work support upon which a block of stone is adapted to be mounted, a girder adjacent the Work support mounted between stationary standards for rocking adjustment on a longitudinal axis lying Without horizontal and vertical planes intersecting its major longitudinal above.

EDGELL ROYCE PLAISTED.

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