US1134286A - Miter-box. - Google Patents

Description

J. PELLETIER.

MITER BOX.

APPLICATION FILED APR.20. 1914.

lpjl 34921, Patented Apr. 6, 1915.

2 SHEETS-SHEET l.

THE NORRIS PETERS Cc., PHOTC-LITHQ. WASHINGTUN4 D. C.

l. PELLETIER.

mmm Box. APPLICATION FILED APR- 20, I9I4.

:L 9 l 34,286 Patented A191.v 6, 1915.

2 SHEETS-SHEET 2.

lill STA FFlC,

JOSEPH PELLETIER, OIE MONTREAL, QUBEC', CANADA.

lVIITER-BOX.

Specification of Letters Patent.

Patenten am. s, isis.

Application led April 20, 1914. Serial No. 833,022.

ing at No. 377 Dorion street, Montreal,

Province of Quebec, Canada, have invented certain new and useful Improvements in Miter-Boxes; and 1 do hereby declare that the following is 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.

The invention to be hereinafter described relates to miter boxes.

1n order to more clearly disclose the construction, operation, and use of the invention, reference should be had to the accompanying drawings forming part of the present application.

r1`hroughout the several figures of the drawings like reference characters designate the same parts.

In the drawings: Figure 1 is a front view of the box; Fig. 2 is a top plan view; Fig. 3 is a detail side view of the saw; Fig. 4L is a section on line 4.-4 of Fig. 3 looking in the direction of the arrows; Fig. 5 is a fragmentary sectional view on line 5-5 of Fig. 1 looking in the direction of the arrows; Fig. 6 is a fragmentary, detail, plan view of the center beam partly broken away to show the adjustment of the vertical angle adjusting rod; and Fig. 7 is a detail front view of one of the backs.

The main objects of the invention are to provide means for quickly and easily sawing horizontal and vertical angles, such means being adapted to receive material of dilferent widths and thicknesses, and also being capable of adjustment to accommodate saws of different widths.

Another object of the invention is, to provide means whereby the saw may be permitted to enter the material for its full width, thus permitting material of practically any height, dependent only on the range of the vertical adjustment of the saw guides, to be cut.

Referring to the drawings in detail, 1 designates the bed mounted on the table 2 in the usual manner. rfable 2 is provided at the center of its back edge with an integral lug 3 to which a hollow beam 4l, of square cross section, is pivoted, near its back end. A rod 5 is rotatably mounted in beam l and extends the full length thereof, and is provided at each end with a block 6, on which a saw guide is mounted.

The rod 5 is provided with a number of circumferential bores adapted to receive the inner end of a spring pressed pin 7 mounted y at one side of beam et. By withdrawing the pin 7, blocks 6 and consequently the saw guides mounted thereon, may be rotated to any desired angle to the vertical and locked in adjustment, by releasing the pin.

A short distance in back of pin 7 a yoke 8 is slidably mounted in groove 9 in the sides of the beam. This yoke is pressed upwardly by coil springs 1() placed between the top thereof and the beam, and the beam is slightly raised, as at 11, and recessed, in order to permit a slight vertical movement of the yoke. The yoke is provided on its top with a centrally located integral lug or tooth 12 operative through an opening 13 through the plate 14 which is secured to portion 11 of the beam, to secure the yoke 8 in position.

A U shaped pressure foot 15 is pivotally mounted on the sides of beam 4, slightly in advance of yoke 8, and has the ends of its arms mounted in suitable recesses 16 near the lower ends of the yoke arms. The tooth 12 of yoke 8 is adapted to engage with a segmental rack 17 integral with the under face of table 2, so as to lock beam A in lateral adjustment. When it is desired to adjust the box for a horizontal angle the outer end of pressure foot 15 is raised, this disengages tooth 12 from rack 17 so that beam 4L may be freely revolved on its pivot. l/Vhen the desired set has been obtained the pressure foot is released and the tooth 12 aga-in coperates with rack 17 to lock the beam, as before. may be quickly and easily set to cut any lateral angle desired, as indicated in broken lines in Fig. 2.

1t will be evident that when the beam t is swung very far to either side the saw is apt to engage the inner end of one of the backs 18. To avoid this difficulty the backs are fitted in their lower edges with shoulders 18a, which are slotted longitudinally as at 19. `When the backs are in operative position the shoulders fit snugly against the under face of bed 1. lThumb screws 20 are inserted through slots 19 and threaded into the table 2. By loosening the screws the backs may be adjusted longitudinally in By this means the blocks l either direction, and secured inadjustment by a friction grip, as clearly shown in Fig.2..

In order to permit work of any height Vto be cut the saw guides are of telescopic construction. To the upper face of each of the blocks 6 a cylindrical tube 21 is secured. This tube is provided in its front and back with alined slots 2la extending from a point near the bottom to the top thereof. This tube is further provided, near its top, with an 'inner annular shoulder 22. A second tube 23, similar to the first tube, is slidably mounted therein. Tube 23 fits snugly in the outer tube and is provided at its lower end with an outer annular shoulder 23a which engages shoulder'22 ofthe outer tube, when the tube 23 is raised to its greatest height, to prevent it from being entirely withdrawn.

A post 24 is slidably mounted in tube 23 a and provided, at its lower end, with van integral outer shoulder which is adapted to engage the shoulder in the 'upper end of the tube. This post is providedwith a central slot 24a extending nearly the full length thereof, which is kept in alinement with the slot of tube 23 by means of a lug 25 integral with the inner face thereofl and operative in a groove 26 in one side of the post. Tube 23 may be turned so as to bring its slot into alinement with the slot of tube 21, thus bringing the guide into operative position to receive the saw. By making the guides of telescopic construction they may be eX- tended so that material of practically any height can be sawed in this box.

In order to facilitate the cutting of material of unusual height it is desirable t0 use a saw no portion of the blade of which is thicker than the Vcutting edge. With this object in viewthe saw 27, instead of being provided with the usual back, is a plane saw and is provided near its upper edge with two parallel horizontal grooves extending the full length thereof. These grooves are located on opposite sides of the saw, a slight distance apart. Near the upper end of slot 24a of post 24 two oppositely disposed lugs 28 and 29 are provided. These lugs are adapted to fit into the grooves of the saw, so as to support it in the post. By this means a saw can be used which is at no point thicker than its cutting edge, and may therefore pass entirely into the material being cut.

As post 24 supports the saw it is necessary that means be provided for adjusting the post so as to have the lower edge of the saw, when the post is in its lowest position, level with the upper face of the bed 1. To permit this adjustment the post is supported by a screw 30 threaded through block 6 and provided with a conical tip which rfits into a conical recess centrally located in the 'bottom of the post. 'By this construction the downward movement of the post may be regulated as desired, which has two important advantages. First, `sfaws of dierent 4widths can be used in the box. Secondly, the `posts can be adjusted so that the cutting edge of the saw will not be allowed topa'ssi beyond the material being cut, so as not to injure the `upper surface of the bed. Another advantage of this construction is, that the weight of the posts 24'is'supported byv the vvsaw, so 'thatthey act to exert a slight` downward pressure on the saw, thus increas# ing its e'iicienc'yand serving" to steady it.

InY orderfto insure accuracy in small works special means have been provided for holding small pieces of material. yThe bedrl is provided, near each end,'with a transverse slot 8l. A rod 32 is rotatably mounted in slot 31' and has its inner end secured through a plate set into the bed, by a loose nut. 4This rod is ofrectangular cross section and has its side edges serrated, as shown in Fig. 2. A'block 'is mounted on rod 32 andis providedwith a'bore of the same lshape but slightly larger than the rod. Bythi's means the'block can beslid, but if it is lforced in either directionl the edges of its bore will engage the serrations of the rod, so as to ses cure it in position. Normally the blocks 33 are turnedV down into recesses 34 in the bedv l, so asto be Hush with the upperfface thereof. When it is desired to securesmall work, the rods are given a half rotation upward, so as toraise the blocks to verticalk position, the blocks -are'then slid -alongthe rods until they are the same distance from backs 18 as the thickness of the materialto be held,the material is then placed between the blocks and-the backs, and acts to bind therblocks on the rod, so as to secure them Yin position. When the smallmaterial has been cut the blocks are moved along rods 32 j until they come opposite their respective recesses, the rodsare then given a half rotationV downward, which turns the blocks into their recesses, out of the way, as in Fig. 2.

Itis thought that the construction, operation, and use of the invention willbe clear` fromV the preceding detailed description. a

Changes may be made in the construction, arrangement, and disposition of the several parts of the invention'without in any way departing from the field and scope of the same, and it is Vmeant to include all such within this application wherein only a pre-` the under face of the table, at the center of the back edge thereof, and provided in one side with a perforation; a segmental rack rigid with the under face of the table, above the said beam; a yoke slidably mounted on the beam and provided with a tooth adapted to normally engage the teeth of the said rack; a pressure foot pivotally mounted on the beam and having its arms mounted in recesses in the arms of the yoke; a rod rotatably mounted through the said beam and having a block at each end, a spring catch adapted to lock said rod to said beam; vertically adjustable saw guides carried by the blocks at the end of the rod; adjusting means therefor; and means for holding small pieces of material.

2. ln combination with a miter boX table and a hollow beam pivoted thereto, means for looking said beam in any position of pivotal adjustment, a rod rotatable in said beam and provided with a circumferential series of bores, a spring catch mounted on said beam and engaging any one of said bores according to the axial position of said rod and a saw-guide block carried by said rod substantially as set forth.

3. In a device of the character described, means for holding small material, comprising; a table; a bed mounted thereon and provided near each end with a slot and a recess contiguous therewith; backs secured to the said table; rods rotatably mounted in the said slot, the said rods being of rectangular cross section and having serrated sides, and having their inner ends loosely secured; and blocks slidable on the said rods, the said blocks being provided with bores slightly larger than the rods and being adapted to be turned down into the recesses, when not in use, and being of such a height as to be flush with the upper face of the bed when so turned down.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

' JOSEPH PELLETIER. Witnesses:

A. BASTIEN,

A. PizzocoLo.

C'opies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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