US876795A

US876795A - Miter-box.

Info

Publication number: US876795A
Authority: US
Inventors: Charles Corrington Galentine
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-04-05
Filing date: 1907-04-05
Publication date: 1908-01-14
Anticipated expiration: 1925-01-14

Description

No. 876,795. PATENTED JAN. 14, 1908.

0. 0. GALENTINE.

MITBR BOX.

APPLICATION FILED APR.5,1907. I

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MITER BOX.

APPLICATION FILED APE.5,1907.

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, curved plate or stri CHARLES OORRINGTON GALENTINE, OF REDONDO, CALIFORNIA.

MITER-B OX.

Specification of Letters Patent.

Application filed April 5. 1907. Serial No. 366.512.

Patented Jan. 14, 1908.

T 0 all whom it may concern:

Be it known that I, CHARLES CORRINGTON GALENTINE, a citizen of the United States, and resident of Redondo, in the county of Los Angeles and State of California, have invented an Improvement in Miter-Boxes, of which the following is a specification.

The object of my invention is to provide a miter-box which is strong, durable, and eflicient and reliable in use, and which may be quickly set for cutting any desired vertical or horizontal angle, it being so constructed that it is composed of a small number of parts and may hence be manufactured economically.

The details of construction, arrangement, and combination of parts are as hereinafter described, and illustrated in the accompanying drawing, in which Figure 1 is a perspective view of my improved miter-box. Fig. 2 is a central vertical transverse section of the same. Fig. 3 is a front elevation, including a bench or support for the miter-box. Fig. 4 is a plan view. Fig. 5 is a rear elevation. Fig. 6 is a horizontal section on the line 66 of Fig. 2.

The bed or base portion of the miter-box comprises a horizontal plate, or web, 1see Figs. 1, 2a graduated arc bar 2, which is arranged in front of the plate 1, but separated therefrom by an arc slot save at the ends, and a vertical semicircular plate 3, which is endent from the rear edge of the horizonta plate 1, all these parts including corner pieces 4see Fig. 1-being cast integral.

It will be noted that the pendent rear plate 3 has a series of vertical ribs 3, by which it is strengthened. The are bar 2 is graduated in degrees from the center, in opposite directions, as illustrated in Fig. 1. A plate 5, which is preferably made of wood, is secured by bolts to the corner pieces 4 of the metal base, or frame, and is separated from the plate 1 of the latter by a slot, as shown. A disk 6,. having a series of radial ribs 6 for strengthening it, is arranged vertically at the back of the horizontal base or frame already described, and its rim is held rotatably in a socket, or guide, formed by means of a 7, that is secured by screws to the edge 0 the back plate 3.

As shown in Figs. 5 and 6, the disk 6 has, adjacent to its edge or rim, a rib 6 that enters a corresponding groove in the socket plate 7. These parts are .so fitted together that the disk may slide, that is to say, rotate, easily in the guide socket thus provided. I employ two pairs of saw guides, the front pair, consisting of parallel bars 88, being attached at the lower end to a horizontal bar 9 (see Fig. 2) the same passing through a block- 10 adapted to slide on the arc bar 2 and through the slot or space that is between the metal plate 1 and the superposed wooden plate 5, its rear end being pivoted to the rear posts 11. The upper ends of the two pairs of

posts

8 and 11 are connected by a bar 12, see Fig. 3, and the lower ends of the posts 11 enter sockets in a pivot block 13; see Figs. 2 and 5. Said block is fitted in a socket 6, which is formed on and projects from the back of the aforesaid disk 6 and is cast integrally therewith. A clampscrew 14 is applied to the sliding block 10 for securing it to the arc bar 2 in any desired adjustment, and a clamp-screw 15, see Figs. 2, 4, 5, is similarly applied to the socket plate 7, for holding the disk 6 in any circular, or rotary, adjustment. Instead of such clampscrews, I may employ spring set-pins 16, but I consider the clamp-screws preferable, since they permit a finer, or more accurate, adjustment.

To each of the pairs of guide rods, or posts, 8 and 11, I apply saw guides proper consisting of tubes or sleeves 17, which are connected at the top and adapted to slide easily on the rods. The saw 18 employed has preferably a straight back, as indicated in Fig. 1, and it is provided with a wire or rod guide 19 which passes over the connections 17 a between the sildable saw guides 17.

In practice, the miter-box thus described is attached to a horizontal support 00 having legs or brackets y, or to any other suitable support, such as a carpenters bench. The horizontal frame or base portion rests in such case directly upon the bench or support m and is suitably secured thereto by bolts. Let it be supposed that it is desired to saw a stick or molding transversely at a right angle to its aXis. In such case, the disk 6 and the sliding block 10 will be adjusted substantially as indicated in Figs. 1, 2, 4, 5, 6, it being understood that the stick or molding will be placed upon the horizontal board 5 and held rigidly while being sawed.

If now it be desired to saw a stick or molding at a vertical angle, that is to say, at an inclination to the aXis of the stick or molding, the block 10 is slid laterally on the are bar 2, say It is obvious that in such case the pivot 13 of the rear saw-guide rods or posts 11, will turn in the socket 6 correspondingly. Thus a saw will work as easily through the slidable sleeve guides 17 as when the posts are set in the position indicated in Figs. 1, 2, &c.

If it be desired to saw a stick or molding at a horizontal inclination, that is to say, to undercut the same, the disk 6 must be rotated in one direction or the other as the case may be, and it is obvious that in such case the rear saw guides 11 move with it, since they are connected. with it by the pivot 13 and are arranged in a vertical slot in the upper portion of the disk 6, as shown in several figures. The rim or edge of the disk may be graduated as indicated in Figs. 1 and 3, to indicate the angle to which it is adjusted and at which the saw will be held by the

guides

8 and 11. Whenever the disk 6 is thus rotated for setting the rear postsat any required inclination, it is apparent the front posts 8 will follow or assume the same inclination through the medium of the top and bottom connecting bars 9 and 12. For adj usting the disk, that is to say, for rotating it, the operator seizes the upper cross bar of the

posts

8, 11, and pulls laterally until the disk has assumed the required position, or until the posts have assumed the required inclination.

It will be apparent that the slidable block 10 with which the front saw guides 8 are connected may be adjusted on the arc bar 2 irrespective of the adjustment of the disk 6 and the inclination of the rear guides 11. Thus, suppose the disk to be turned to the left and the rear saw guides 11 placed at an inclination of 45, the block 10 may be slid right or left on the arc bar 2, to any desired point, the front guides 8 retaining all the time the same lateral inclination as the rear guides 11, from which they are held equidistant in all adjustments. I am thus able to set the apparatus easily and quickly for to the left, as indicated in Fig. 3. l cutting any desired angle, vertical-or horizontal.

In Fig. 3 the dotted lines show the two sets of guide rods 88 and 1111 adjusted at an angle, or inclined to the right. In such case, the wire 19 attached to the saw 18 serves, by pressure u on the heads17 of the sleeves 17 to cause t em to follow down the

rods

8 and 11, which they would not freely do by gravity alone.

What I claim is 1. The improved miter-box comprising a horizontal base portion formed of a plate I having a pendent part provided with a rim socket and a front are bar which is separated from the horizontal plate by a slot, a block which is slidable on the arc bar, a disk which is supported in a vertical plane on the rear part of the base and held rotatably in the socket thereon, rear saw guides having a pivot and a socket in which such pivot is held on the back of the disk, front saw guides arranged parallel to the rear ones, a top bar connecting both pairs and a lower bar connecting their lower ends, the same passing through the block on the arc bar and being adapted for rotation therein, whereby the two sets of posts maybe set together at various vertical angles and the frontposts may be adjusted laterally around the rear posts as a center, substantially as described.

2. In a miter-box, the combination, With a frame comprising a horizontal plate and a pendent rear plate, of a vertical disk held rotatably on such rear plate and having on its back a cylindrical socket, rear saw-guides having a cylindrical pivot ournaled in the socket, front saw-guides supported vertically, a bar connecting the upper ends of both sets of guides, and a front arc bar whereon the front saw-guides are supported slidably, as shown and described.

CHARLES OORRINGTON GALENTINE. Witnesses: I

GEO. A. RILEY, J. K. SMITH.