US857520A - Miter-box. - Google Patents

Description

PATENTED JUNE 18 1907.

M. J. GOODALE.

MITER BGX.

uruornon rum) BEPT.17. 1906.

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M. J. GOODALE.

MITER BOX. APPLICATION FILED arm. 11. 1906.

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PATBNTBD JUNE 18, 1907.

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UNITED STATES PATENT orrrcn.

MARION J. GOODALE, OF TOLEDO, OHIO.

MITER-BOX.

Specification of Letters Patent.

Patented June 18, 1907.

Application filed September 17, 1906. Serial No 334,826.

Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Miter-Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to miter-boxes of the form in which the saw-frame swings about a vertical axis and also tilts about a horizontal axis, and it has for its object to provide an improved device of this class, which is simple,

strong and economical in its construction.

The operation, construction and arrangement of the parts of the invention are fully described in the following specification and shown in the accompanying drawings, in which Figure 1 is an end elevation of the miterbox comprising my invention, with the saw shown in raised position. Fig. 2 is a rear elevation thereof, with the saw-frame tilted. Fig. 3 -is a partial vertical section of one of the saw guides. Fig. 4 is a detail of the spring. saw-clip. Fig. 5 is a partial rear elevation of the box. Fig. 6 is a cross-section of a portion of the box. Fig. 7 is a top view thereof. Fig. 8 is a front elevation. Fig. 9 is an enlarged detail of the coacting portions of the saw-frame and vertical guides, and Fig. .10 is a vertical section taken on the dotted line as a: in Fig. 9.

Referring to the drawings, 1 designates the bed of the miter-box, which is mounted. on suitable legs 2, and 3 the end portions of the back-plate which are rigidly secured, to the bed. The intermediate or central portion of the back-plate comprises a rotatable part 4, which is suitably mounted on and adapted to turn about a stud 5 projecting from the rear edge of the bed 1 as an axis, and has its'ends describing arcs of a common circle, whichv substantially abut the correspondingly out inner ends of the back portions 3, as shown. When the back part 4 is in position for a ver tical cut its upper edge is on a plane with the upper edge of the back portions 3, as shown in Fig. 8, while its lower edge is preferably shaped to form the two sector-wings 6 which extend a distance below the bed substantially equal to the greatest arc of tilting adjustment of said part, so that their lower edges will not be raised above the bed when the part 4 is tilted. Segmental strips 7 are secured to the outer sides of the back portions 3 in position to overlap the ends of the part 3 and serve as guides therefor in its turning movement.

The part 4 has its central portion provided with a saw opening 8, which extends from the upper edge of the back to the surface plane of the bed, and has its outer side edges beveled, as at 9 in Fig. 7, to enable the saw to be swung horizontally relative thereto and its lower side edges contracted on converging planes to form the restricted opening 8 as shown in Fig. 5. The lower converging walls of the opening 8 are each cut at a proper angle relative to the bed I to adapt any point thereon falling in the plane of movement of the saw, as itapproaches one side or other of the opening due to a turning of the back, to lie in a plane below the plane of the bedsurface, so that the saw, irrespective of'its angle of cut will be enabled to have contact with the bed surface. This manner of constructing the back is very essential, as it is neces sary to the performance of good work, espe- -.cially when light strips of material are being sawed, that the back shall present a practically uninterrupted surface to the material so that a firm back is provided at, or substantially at, the point of action of the saw, thus preventing a binding of the material on the saw blade due to a slight flexibility thereof occasioned by the lateral sawing strain.

Pivoted beneath the bed 1, as at 10, Figs. 5 and 6, for horizontal swinging movement relative thereto is a prolonged tubular bearing member or sleeve 11, in which is loosely mounted the horizontal shaft 12. Either bent from or secured to the ends of this shaft by elbows 12, or in any other suitable man ner, are the two tubular uprights 13, which combine with said shaft to form a U-shaped saw-frame. These uprights are longitudinally slotted, as at 14, to form openings in which the saw 15 operates, and each carries a block 16 mounted. for reciprocal movement therein and having a slot 17 through which the saw passes. The upper ends of the guidestandards or uprights 13 are connected by a flat metal strip 18, which is shown as having its ends given a quarter turn to adapt them to extend within the slots 14 of the uprights IO Z IIO

and its intermediate portion rovided with a vertical slot 19, which extencs substantially the length of such portion. The ends of the strip 18 are secured to the upri hts by bolts 20, which loosely pass througi registering slots 21 in the sides of the uprights to adapt the strip 18 to have a limited. movement longitudinally of the uprights for the purpose hereinafter specified:

Secured to and rising from the end portions 3 and rotatable part 4 of the back in slightly spaced relation are the two concentric segmental guide- strips 22 and 23, respectively, which have their arcs struck from the axis 5 of the rotatable part 4, thus adapting the strip 23. to have a turning movement within the relatively fixed strip 22.

Supported directly above the saw-opening 8 of the part 4 of the back by uprights 24 rising from said part, is a vertically disposed plate 25, which has its lower edge disposed in contiguous position to the outer edge of the guide-stri 22 and carries the handle 26. This hand e has its lower end longitudinally slotted to adapt it to straddlesaid plate, the slot being of sufficient depth to enable it to project below said plate and on either side of the guide-strip 22, as shown. in Figs. 9 and 10, whereby to serve as a guide to preventa lateral movement of the plate and handle relative to said strip. Carried either by the plate 25 or lower end of the handle .26 is a spring dog or latch member 27 which is adated to coact with notches 28 on the gui e-strip 22 to maintain the associated parts inrigid adjustment relative to said guide-strip.

A segmental guide-strip 29 projects forwardly from the under side of the bed 1 to which its ends 'are secured in any suitable manner, and is provided with a series of notches 30 with which the dog 31, carried by the block 32, engages. This block is mounted 011 the outer or free end of thebearing member 11 and is provided with an opening transversely therethrough in which the guidestrip 29 operates. The outer or free end of the bearing-member 11 and its shaft 12 are supported in parallelism with the bed by a guide-strip 33 on which the former loosely rests and which has its ends bent upwardly g25nd suitably secured to the under side of the In order to firmly brace the upper portion of the saw-frame against lateral movement relative to the inner guide-strip 23 of the back and at the same time enable the flat strip 18 to have a pivotal movement relative to said guide-st1'ip, or in other words, to provide a pivot for the strip 18 in substantial axial alinement with the pivot 10 of the bear ing member 11, I secure a pivot or vertical stud 34 to the central portion of the guide strip 23 in position to pass through the slot in the strip 18 and in substantial axial alinement with the pivot 10 of the saw-frame.

This is found to be important to accurate adjustment and the performance of satisfactorywork.

The saw when not in use is suspended in elevated inoperative position by a spring clamp 35, which is slidably carried by the strip 18 connecting the two uprights 13. This clamp comprises a U-shape member, as shown in Fig. 4, which is formed of spring metal and has its terminals bent inwardly to formhooks 36 for engaging the bead 15 of the saw, as shown.

In the operation of my improved miterbox the saw and its frame are swung horizontally to the desired position ofadjustment by simply releasing the dog 31 from engagement with the segmental strip 29 and swinging the frame around until it reaches the desired angle, where it is held by the dog engaging one of the notches 30 in said strip. In tilting the saw and its frame in one direction or the other relative to a vertical the operator grasps the handle 26 carried by the rotatable part 4.. of the back and on releasing the dog 27 from engagement with the strip 22 he is permitted to throw the rotatable part 4 and sawframe in either direction to the angle at which it is desired to make a cut, the sawframe being rotated by the contact therewith of the pivot or stud 34 carried by the segmental guide-strip 23. The mounting of the saw-frame and the part 4 on separate axes causes the ends of the uprights 13 of the sawframe and the guide-strip 23 to describe dif ferent arcs in their turning movements so that the strip 18 connecting the two uprights is caused to have a movement longitudinally of said uprights as it travels within the space provided therefor between the fixed and movable segments 22 and 23, as shown in Fig. 2. This movement also causes the saw to approach the side of the opening 8 toward which the frame is tilted and to slightly change its angle relative to the top of the part 4. The purpose of offsetting the axis of the part 4 from that of the saw-frame is to place the axis of the former as close as possible to the surface plane of the bed, as it is found that a'more satisfactory miter-box of the tilting type is thereby provided.

While I have shown and described but one construction of my invention I wish it understood that I do not desire to be limited to the exact details of such construction, for obvious modifications will occur to a person skilled in the art.

Having thus described my invention, what .I claim as new, and desire to secure by Letters Patent, is,-

1. In a miter-box, a relatively-fixed back having a rotatable part, spaced concentric segmental strips rising from the back, a sawframe mounted for movement about a hori zontal axis, and a member passing between the segmental strips and. connecting the uprights of the saw-frame, substantially as described.

2. In a miter-box, a back having a rotatable part, segmental strips fixed to the rotatable and fixed portions of the back in concentric spaced relation, whereby one has a turning movement within the other, a sawframe mountedfor movement about a horizontal axis, and a member passing loosely between said strips and connecting the uprights.

In a miter-box a back having a rotatable part, a saw-frame mounted for horizontal and vertical pivotal movements and having its horizontal axis offset from that of the rotatable part, spaced segmental guidestrips fixed to the back and concentric to the axis of said part, and a member passed between said strips and. having its ends in longitudinally sliding connection with the uprights of the sawrame.

4. In a miter-box, a back having a rotatable part, a saw-frame mounted for horizontal and vertical pivotal movements, a member connecting the uprights of said frame above said part and having pivotal connection with said part in substantial axial alinement with the vertical pivot of the saw-frame 5. In a miter-box, a swinging saw-frame comprising a horizontal shaft carried beneath the bed, longitudinally-slotted tubular uprights carried at the ends of said. shaft, saw-guides slidingly mounted in said upri hts, a member connecting the upper ends oii said uprights, and a pivotal member about which said member is adapted to swing.

6. In a miter-box, a swinging saw-frame comprising a U-shape member having longitudinally slot-ted tubular uprights, sawguides vertically movable in said uprights, a member connecting the upper ends of the uprights and having pivotal connection with the back of the box, and means carried by said member for holding the saw in elevated inoperative position.

7. In a miter-box, a back having a rotatable part, a U-shape saw-frame mounted for swinging and tilting movements, a notched segmental strip carried by the fixed portion of the back, a segmental strip carried by the rotatable part concentric to said first strip and spaced therefrom, a member connecting the uprights of said saw-frame and having a fixed pivot on the strip carried by said part, and means carried by said part for locking with the notches in theiirst mentioned. strip, substantially as described.

In testimony whereof I have hereunto signed my name to this specification in the presence oi two subscribing witnesses.

MARION J. GOODALE.

Witnesses:

VILBER A. OWEN,

CORNELL SCHREIBER.

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