US615097A

US615097A - nicholls

Info

Publication number: US615097A
Authority: US
Publication date: 1898-11-29
Anticipated expiration: 1915-11-29

Description

No. 6l5,097. Patented Nov. .29, I898.

M. NICHOLLS.

MITER BOX.

(Application filed Aug. 25, 1897.;

No Model.) 2 Sheets-Sheet I.

NITED STATES PATENT Fries.

MOSES NICHOLLS, OF GLENWOOD, IOWA, ASSIGNOR OF ONE-HALF TO FRANK GIGRAY, OF SAME PLACE.

MlTER-BOX.

SPECIFICATION forming part of Letters PatentNo. 615,097, dated November 29, 1898.

Application filed, August 25, 1 8 9 7.

To all whom it may concern.-

Be it known that I, Mosns NICHOLLS, of Glenwood, in the county of Mills, State of Iowa, have invented certain new and useful Improvements in Miter-Boxes, of which the following is a complete specification, reference being had to the accompanying drawings.

The object of my invention is to produce certain improvements in miter-boxes of the class shown in my Patent No. 536,936, issued April 2, 1895, whereby particularly the adj ustability and adaptability of the machine is improved and whereby its general practical efficiency is increased.

In the accompanying drawings, Figure I is a perspective View of my machine complete, with the saw-guides in the vertical adjustment and with the guide-carriage at right angles to the bed-plate. Fig. II is a top plan view of the same with the floor of the bedplate removed. Fig. III is a central vertical section of the machine, taken on the line III III of Fig. II:

Referring to the figures on the drawings, 1 indicates the bed-plate of my machine, which preferably consists of a single skeleton casting. To it are preferably secured at oppositeends leg-supports 2, which in practice may be screwed to a bench or the like. In one side of the bed-plate, near its middle part, is provided in the bed-plate casting a collar or hub 3. Extending between the sides 4 and 5 of the bed-plate, with the center of the collar 3 as its center, is provided a semicircular track or brace 6, and extending through it between the sides 4 and 5 are preferably provided diagonal braces 7 and cross-braces 8'.

10 indicates the main frame-piece of the guide-carriage, which-is provided at its opposite ends with heads 11, having exterior vertically-disposed flat surfaces. The carriage near one end is provided with a bolt-hole 13, through which a bolt 14 passes. The bolt 14, whose head is preferably countersunk in the bolt-hole 13, passes downwardly through the collar 3 and through an aperture 15 in the guide-carriage-clamping member 16, upon the opposite sides of which nuts 17 are screwed upon its ends to movably unite the parts specified. The retaining member 16 is preferably provided at the end opposite the bolt- Serial No 649,476. (No model.)

hole 15 with an upturned end 18, through which a set-screw 19 passes in order to enter a screw-threaded aperture in a cross-piece 20 upon the guide-carriage frame-piece 10. The frame-piece 10 and the retaining member 16 extend. upon opposite ends of the frame-piece 1, upon which it is movable with a degree of friction determinable by the adjustment of the set-screw 19.

The retaining member 16 is provided with a longitudinally-disposed elongated recess 21, within which works the upturned end 22 of a lever 23, pivoted, as indicated at 24, to the opposite walls of the retaining member 16. The upturned or engaging end 22 of the lever is normally urged toward the frame 1, as by a spring 25, fixedly set between the lever and the retaining member 16. The lever 23 terminates in a handle or thumb-piece 26 and is preferably held in alinement by a stud 27, projecting downwardly from the adjacent head 11 of the frame-piece 10 through a slot 28 in the lever. The engaging end 22 of the lever swings in the path of the track 6, which is notched at required intervals for its recepttion, one of the notches being indicated at 29 .in the drawings. By means of the lever and the notched semicircular track 6 the horizontal swing of the guide-carriage may be adjusted, the only manipulation required being the depression'of the handle 26 of the lever 23 and the shifting of the position of the carriage to the required angle.

30 indicates a rock-shaft, which is preferably united to or cast integrally with guidesockets 32, secured to its opposite ends. The length of the rock-shaft 30 is substantially equal to the distance between the opposite flat surfaces of the guide-carriage heads 11, so that the opposing faces of the tailpieces 33 of the sockets 32 may work against the faces 34 of the heads. For this purpose the opposite faces of the tailpieces 33 are planed flat to meet the faces 34, as indicated at 35. Adjacent to the sockets 32 the rock-shaft 30 is preferably turned to form smooth bearings 36, that are secured in the upper parts, respectively, of the opposite headsll of the guidecarriage, as in split boxes 37, the cap-pieces 38 whereof may be secured, as by. screws 39.

The head 11 adjacent to the handle 26 is provided with a segmental slot 42, concentric with the rock-shaft 30. Through the slot 42 is inserted a bolt 43, which, passing through a bolt-hole 44 in a boss 45, provided for it on its tailpiece 33, carries on its outer screw-threaded extremity a winged nut 40.

By the means described the sockets maybe set at any vertical inclination and when set may be rigidly secured to the head across which it oscillates by turning the nut 46. The edge of the head is preferably curved concentrically with the slot 42 and is provided with a scale-measure 47, against which the angle of the inclination of the socket may be nieasured, the edge of the tailpiece 33 being employed as an indicator.

Each of the sockets is hollow through its entire length and is provided in its side walls with diametrically opposite narrow slits or saw-recesses 49. In the two sockets there are four slits altogether and each of the slits is in vertical alinement one with the other. Each of the sockets carries a saw-guide 50. Each saw-guide is provided with an enlarged head 51, that is employed to limit the downward movement of the guide through its socket,

and each is provided in its opposite walls with a blade-kerf 53, having at its opposite ends enlarged

apertures

54 and 55, respectively. The kerfs 53 are designed to aline with the slits 49 to permit the reception of a tenon or other saw in the ordinary manner, the enlarged aperture 54 at the upper end of the respective kerfs being especially provided to accommodate the back of a tenon-saw.

For adjusting the downward cut of the saw I prefer to provide upon each of the sockets a longitudinally-slotted plate 55, through whose slot 56 a winged bolt 57 enters a screwthreaded hole 59 in the socket.

By the manipulation of the bolts 57 the plates 55" may be adjusted vertically upon the sockets. Each plate 55 is provided at its upper end with a flange 58,which, projecting in the path of the head 51 of the guide, limits the downward movement of the guide. By this means through the adjustment of the plate 55 the downward cut of the saw may belimited, and by reason of the independence of the adjustment of the plates it maybe made to cut in a line parallel or oblique to the bedplate of the machine, as well as to a predetermined limit.

The rock-shaft 30 is preferably depressed or embedded between the opposite sides of the main framepiece 10 of the guide-carriage, whose edges preferably rise flush with the surface of the top of the floor (30 of the bedplate 1. The floor 60 preferably consists simply of two pieces of wood, having obliquelydisposed edges 61, whose planes approach each other in the direction of a right angle. The guide-carriage swings between the edges 61, and its movement is limited by them and by the faces of the oblique braces 7 with which they are alined.

Through the construction described, in which the floor 60 and the edges of the framepiece 10 are made flush one with the other, a practically continuous support for material to be sawed is at all times afforded, the edges of the material defined by the cut of the saw, both before and after they are severed, being firmly sustained by the edges of the framepiece 10.

As above specified, the plates 55 serve, through engagement with their flanges 58, to adjust the elevation of the guides 50. An additional and permanent means of limiting the downward movement of the guides is, however, provided in order to prevent without any intermediate protection contact between the saw-blade and any portion of the guidecarriage or parts thereon located underneath the edge of the saw. I prefer to employ for that purpose set-screws 62, which, screwing in suitably-threaded apertures in the bosses 45, that are provided upon both of the tailpieces 33, abut against the ends of the sawguides 50, respectively, and serve to interrupt the downward movement of the saw-guides at any point to which they may be adjusted.

The bed-plate 1 is provided with vertical back plates 64, whose interior surfaces are preferably corrugated, as illustrated. The back plates 64 may be secured to the bedplate or, as illustrated, cast integrally there-.

with. The only distinctive feature of the back plates consists of the embodiment there with of separable substantially triangular sections 65, which when in place present vertical parallel edges 66, between which a vertical saw-blade may work. The lines of juncture between the opposing edges of the sections 65 are clearly illustratedat 67 in Fig. I of the drawings.

The sections 65 are employed to advantage for all horizontal adjustments of the guidecarriage 10. When, however, a verticallyoblique adjustment is required through the swinging movement and adjustment of the rock-shaft 30, one or the other of the sections may be removed. The sections are preferably provided with flanges 68, (see Fig. 11,) through which wing-nuts 69 are inserted and screwed into the back plates 64.

For clamping the work upon the floor 60 of the bed-plate any suitable clamping mechanism may be employed. That illustrated consists of an arch 70, provided with a long leg 71, which may be inserted into a suitable aperture in a lug 72 upon the back of the bedplate and secured in position, as by an abutment wing-bolt 73, screwing into the wall of the lug. The shorter or overhanging leg '75 of the arch extends above the floor 60 of the bed-plate and may be swung upon the long leg as a pivot to and from the back plates 64. To hold the material to be cut upon the floor 60, the arch is first adjusted and approximately at the required elevation, after which the material may be clamped, as by means of a cam 76, pivoted to the end of the leg 75 and provided with a handle 77, by which it may be actuated.

What I claim is 1. In a miter-box, the combination with a bed-plate of a guide-carriage comprising a main frame-piece located above and a clamping member located below the bed-plate respectively, a bolt passing through the members of the guide-carriage adjacent to one end and through the base-plate, a rock-shaftjournaled Within the mainframe-piece above the base-plate and provided at its opposite ends with guide -sockets, saw-guides within said sockets, means for limiting the movement of said guides, mechanism for pivotally adjusting the guide-carriage, means for adjusting the inclination of the guide sockets, and means for regulating the frictional resistance opposed to the rotation of the rock-shaft, substantially as specified.

2. In a miter-box, the combination with a bed-plate, of a guide-carriage comprising a main frame-piece located above and a clamping member located below the base-plate, a bolt passing through the members of the guide-carriage and through the base-plate and designed to pivotally unite the latter with the guide-carriage, a rook-shaft journaled in the main frame-piece above the baseplate and provided with terminal guide-sockets, guides within the guide-sockets, means for fixing theangular adjustment of the sockets, means for fixing the pivotal adjustment of the guide-carriage, an extension upon the clamping member of the guide-carriage, and a set-screw passing through the extension, through the main frame-piece, and into contact with the rock-shaft whereby the members of the guide-carriage are retained in their proper relative positions, and the frictional resistance to the rotation of the rock-shaft may be regulated, substantially as specified.

3. In a miter-box, the combination with a bed-plate of a main frame-piece located above the base-plate and provided with depending terminal heads, a clamping member located below the base-plate, a bolt pivotally uniting the main frame-piece and the clamping member to the base-plate, a curved track provided with a series of notches, a spring-actuated lever carried by the clamping member provided with an upturned end designed to engage the notches in the track, and with an aperture adjacent to its opposite end, a stud carried by one of the heads of the guide-carriage and extending through the aperture in the latter, a rock-shat t j ournaled to the main frame-piece above the base-plate, and provided with terminal saw-guides, and with depending tailpieces lying fiat against the head of the main frame-piece, one of which latter is provided with a curved slot and adjacent scale, a boss upon one of the tailpieces, abolt 43 passing through the slot in the head and through the boss, a nut upon the bolt designed to fix the rock-shaft in its adjusted position, aset-screw likewise passing through said boss and designed to limit the movement of the adjacent saw-guide, an extension upon the clamping member and a set-screw passing through said extension and through the main guide-piece into contact with the rockshaft whereby the members of the guide-car riage are secured in their proper relative positions and the frictional resistance to the rotation of the rock-shaft is regulated.

4:. In a miter-box, the combination with a bed-platev and back plates, of a guide-carriage pivotally united to the bed-plate, a rockshaft carried by the guide-carriage saw-guides carried at the opposite ends of the rock-shaft, and substantially triangular removable backplate sections presenting parallel contiguous edges when in place and designed by their removal to leave an angular aperture for the accommodation of the saw, substantially as specified.

In testimony of all which I have hereunto subscribed my name.

MOSES NIOI-IOLLS. WVitnesses:

E. STARBUCK, W. L. SMITH.