US703946A - Metal-sawing apparatus. - Google Patents

Description

N0. 703,946. Patented July I l902.

C. '0. MORGAN. METAL SAWINGAPPARATUS.

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Nu. 7o3,'9= i6; Patentpd July I, [902 c. 0. momma. METAL SAWING APPARATUS. (Application filed Apr. 8, 1902.

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UNITED STAT S PATENT OFFICE.

CHARLES O. MORGAN, OF REDWOOD FALLS, MINNESOTA.

METAL-SAWING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 703,946, dated July 1, 1902. Application filed April 3, 1902. Serial No. 101,264. (No model.)

T0 (0 whom it may concern.-

Be it known that LCHARLES O. MORGAN, a citizen of the United States, residing at Redwood Falls, in thecounty of Redwood and State of Minnesota, have invented new and useful Improvements in Metal-Sawing Apparatus, of which the following is a specification.

My invention relates to metal-sawing apparatus, the same being particularly designed for the purpose of sawing metallic bars,tubes, and the like.

The object of the invention is to provide'a hand-operated machine of thiskind by means of which the work of cutting a metallicbar or tube may be neatly, rapidly, and effectively performed. 1

Other objects of the invention will hereinafter appear, and the novel features thereof will be set forth in the claims.

In the drawings forming part of this specification, Figure 1 is a plan View of a metalsawing machine constructed in accordance with my invention. Fig. 2 is a vertical section of the same on the line 2 2 of Fig. 1. Fig. 3 is a similar section on the line 3 3 of Fig. 1. Fig. 4 is a section on the line 4 4 of Fig. 1, and Fig. 5 is a detail view of the work-table.

Like reference-numerals indicate like parts in the different views.

The base or framework 1, on which the operative parts of my machine are mounted, is preferably made from a single casting, which may be bolted or otherwise secured to a table or other support. however, be otherwise cohstructedfif desired. The said base or framework'l has secured thereto or formed integral therewith the uprights or standards 2 2, in which is mounted for rotation a saw-shaft 3, having a circular saw 4, of any suitable or preferred construction, secured to one end thereof. The opposite end of the shaft 3 is provided with a beveled pinion 5. Also secured to or formed integral with the base or framework 1 are the uprights 6 6, in which is mounted to turn a drive-shaft 7, having a beveled pinion 8 on one end thereof, which meshes with the pinion 5 on the shaft 3, and having an operating crank or handle 9 on the end thereof opposite the pinion 8. The shafts 3 and 7 are set Said framework may,

at an angle to each other; but through the pinions 5 and 8 the shaft 3, and consequently the saw 4 thereon, is driven from the shaft 7. Secured to or formed integral with the base 1 are the parallel rails or guideways 10, the same extending parallel to the plane of the saw, 4, as shown. These rails 10 are preferably produced by flanges struck up from or cast on the base 1, the upper edges of the same lying in the same plane with each other, and by preference in a horizontal plane. Slidingly mounted upon the rails 10 is a feed or work table 11, the same being formed with depending flanges 12, which overlap the sides of the rails 10'. The upper surface of the table ll is provided with a longitudinally-extending depression 13, through the bottom wall of which is cut an elongated slot 14, slightly narrower than the depression 13 and forming shoulders or ledges 15 on opposite sides thereof. Extending through the slot 14 is a pin16, secured to a post 17, extending upwardly from the base 1, the upper end of said pin being screw-threaded to receive a nut 18, the said nut 18 holding in'place a washer 19, which bears against the shoulders orledges15. Theconstructionjustdescribed is provided for the purpose of holding the ta- 1 ble 11 down upon the rails 10, with provision for sliding movement of said table on said rails. I do not, however, limit myself to this exact construction, as it is obvious that other means may be provided for accomplishing the same result.

Formed in the upper surface of the table 11 is a transversely-extending groove or depression 20 for the reception of the work to be operated upon. The Work is retained in operative position in said groove by means of a clamping-jaw 21, which is pivoted at one end to the table 11. To provide for the pivotal connection between the table 11 and the jaw 21,1 form upon said table the upwardlyextending lugs or ears 22 and form upon said jaw the downwardly-extending lugs or ears 23. These ears are perforated for the reception of a pivot pin or bolt 24. The free end of the clamping-jaw 21 is normally urged upwardly or away from the table 11 by means of a coil-spring 25, which is interposed between these two parts, the lower end of the same being seated in a socket 26 in the table 11 and the upper end thereof being seated in a socket 27 in the jaw 21. The said jaw is moved, however, to its clam ping position and held in such position by means of the bolt 28, having a thumb-nut 29 on its free end. The said bolt 28 extends through an opening 30 in the table 11, the head 30 of said bolt bearing against the under side of said table. The said bolt passes through the opening 31 in the clamping-jaw 21, and the winged thumbnut 29 fits upon said bolt above the clamping-jaw 21 and when screwed downwardly is adapted to engage said clamping-jaw for forcing the free end thereof into its depressed or clamping position.

Longitudinal movement may be imparted to the table 11 in either direction by means of an operating-lever, 32, fulcrumed at its lower end to the base 1 and connected through the link 33 with the table '11. By moving the free end of said lever forwardly or rearwardly a corresponding movement will be imparted in an obvious manner to the table 11 and the parts carried thereby. I

In the operation of my device the metallic bar or tube to be cut is placed within the groove 20 in the upper surface of the table 11, with one end thereof projecting beyond the side of said table which lies adjacent to the saw 4. The clamping-jaw 21 is then moved to its clamping position by screwing the winged nut 29 downwardly on the threaded bolt 28. The bar or tube is thereby firmly clamped to the table 11 against danger of accidental displacement. The crank 9 is now turned by one arm of the operator to cause the rotation of the saw 4. At the same time the free end of the operating-lever 32 is grasped by the hand of the other arm of the operator and moved forwardly. This action by the connections above described causes a corresponding movement to be imparted to the table 11, with the result that the work carried thereby is fed to the cutting edge of the saw 4. Such a degree of pressure is applied to the lever 32 as is necessary or requisite to keep the work and saw in operative relation to each other and to produce a smooth even cut through the material operated upon. There is no danger of varying the position of the work with respect to the plane of the saw 4, and consequently a perfectly smooth and even cut may be produced. Furthermore, there is no danger of vertical displacement of the work-table 11, as the same rests upon and is guided by the rails and is prevented from upward movement by the engagement of the washer 19 with the elongated shoulders or ledges on opposite sides of the slot 14:. When the saw 4: has completed the severance of the metallic tube or bar operated upon, the table 11 may be retracted to its normal position by merely reversing the movement of the lever 32. To nnclamp the tube or bar from the work-table 11, it is merelynecessary to unscrew the winged nut 29, when the spring will act to elevate the freev end of the clamping-jaw 21, so as to move the same away from the table 11.

The washer 19, heretofore referred to, is a spring-washer, the same being constructed from sheet-steel, dished on its under side and bearing around its edges on the ledges or shoulders 15 and acted upon at its center by the nut 18. The said washer, in connection with the parts which cooperate therewith, serves to hold the work-table 11 in yielding contact with the rails 10, so that said table may be operated with an easy soft elastic movement on said rails. The use of said washer overcomes the necessity of having the bearing-surfaces of the ledges 15, as well as the under surface of. the table, which rests upon the rails 10, and also the tops of the rails, milled, machined, or planed. This would be necessary if the spring-washer referred to were not employed, thereby greatly adding to the cost of manufacture of the machine.

' It has been heretofore stated that the drive or crank shaft 7 is set at an angle to the sawshaft 3. The object of this construction is not only to enable the crank 9 and the operating-lever 32 to be readily graspedby an operator, but it also enables the metallic bar or tube being cut to extend for an indefinite distance parallel to the shaft 3 without interfering with the operation of the crank 9. If said crank were formed directly on the shaft 3 or if the shaft '7 extended in line with said shaft 3, the metallic bar or tube being operated upon would interfere with the rotation of said crank.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is j 1. In a sawing-machine, the combination with a base or framework having upwardlyextending parallel rails thereon, a saw-shaft at right angles to said rails and a saw carried thereby, of a longitudinally-movable worktable mounted upon said rails, having depending flanges which bear against the sides of said rails for preventing lateral movement of said table, and having an elongated slot therein, a support secured'to said base between said rails, a projection upon the upper end of said support extending through said slot, and a spring-washer upon the upper end of said projection engaging the upper side of said table, as and for the purpose set forth.

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2. In a sawing-machine, the combination with a base or framework, having upwardlyextending parallel rails thereon, a saw-shaft at right angles to said rails, and a saw carried thereby, of a longitudinally-movable worktable,mounted upon said rails,havingdepending flanges thereon, which bear against the sides of said rails for preventing lateral displacement of said table and having a longitudinal depression therein provided with an elongated slot in its bottom wall forming ledges or shoulders, a support secured to said base between said rails, a projection on the ing flanges thereon which bear against the sides of said rails for preventing lateral displacement of said table, and having a longitudinal depression therein provided with an elongated slot in its bottom wall forming ledges or shoulders, a support secured to said base between said rails, a projection on the upper end of said support extending through said slot, a spring-washer surrounding said projection and bearing against said shoulders or lodges, and a nut upon the upper end of said projection, as and for a purpose set forth.

4. In a metal-sawing machine, the combination with a base having two sets of uprights thereon, of a saw-shaft mounted to'turn in one set of said uprights having a saw upon one end and a pinion upon the other, a driveshaft mounted to turn in the other set of said uprights, set at an angle to said saw-shaft and having a pinion on one end meshing with the pinion on said saw-shaft,and a crank on the other end, a pair of rails secured to said base, a work-table mounted to slide on said rails, means for clamping the work to said table, an operating-lever fulcrumed to said base, and a link connecting said lever with said Work-table for moving the same longitudinally toward and away from said saw.

In testimony whereof I have hereunto set my hand in presence of 'two subscribing wit- IIGSSBS.

CHARLES O. MORGAN. Witnesses:

CHARLES H. KENNEY, GEORGE L. EVANS.

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