US425051A

US425051A - rowland

Info

Publication number: US425051A
Authority: US
Publication date: 1890-04-08
Anticipated expiration: 1907-04-08

Description

2 Sheets--Sheet 1.

(No Model.)

J. H. ROWLAND.

MITER BOARD.

Patented Apr. 8

1w. norms PETERS 2a., PNGYB-LITHO., wAsmma 2 Sheets-Sheet 2.

(No Model.) 7

J. H. ROWLAND.

MITER BOARD.

Patented Apr. 8, 1890.

j' ZZ'";

UNITED STATES PATENT OFF-ion.

JOHN HENRY ROWLAND, OF CARLTON, NEAR ll/IELBOURNE, VICTORIA.

M lTER-BOARD.

SPECIFICATION forming part of Letters Patent No. 425,051, dated April 8, 1390.

Application filed August 12,1889. Serial No. 320,541 (No model.)

To ail whom it may concern:

Be it known that I, JOHN HENRY Row- LAND, stair-builder, a subject of the Queen of Great Britain, residing at 152 Pelham Street,

Carlton, near Melbourne, in the British Colony of Victoria, have invented new and useful Improvements in Miter-l3oards, of which the following is a specification.

This invention relates to that class of miter-boards for which I obtained United States Letters Patent No. 146,403, dated the 13th day of January, 1874, wherein provision is made for cutting either vertical or horizontal miters, as well as combined Vertical and horizontal miters, or splayed miters, as they are usually called.

The object of this invention is to produce a miter-board of this class which will offer increased facilities for cutting a wider range of miters than has been the case with miterboards hitherto.

It consists in certain structural features and combinations of parts or elements, as hereinafter fully described, and as illustrated in the accompanying drawings, wherein- Figure 1 is a front elevation, Fig. 2 a plan, and Fig. 3 a side elevation, of a miter-board embodying my present improvements.

As in the former case, the two parts A A of the base of the board are hinged together at a, for instance, and are provided with a pair of guide-bars B B, which are pivoted at 1) upon the upper face of the movable part i A in such a manner that they serve to 35 hold the work, as ordinarily, at the angle at which it is desired to cut the miter. A graduated quadrant b is let into the said movable part of the base and serves to indicate the angle at which the said guide-bars B are set, and they may be secured at such angle by clamps b passing through slots b in said guidebars, as shown, and each having a thumb screw 1)", arranged to bear firmly against the under side of the base of the miterboard, as shown. The two parts A A of this base may be secured at any required angle one with the other by means of the set-screws a a, which pass through downwardly-extending brackets a secured to the fixed part A of the said base, and through slots cut in the quadrant of. This quadrant is graduated, as

illustrated in Fig. 3, in order to facilitate the adjustment of the movable part A of the base to the required angle, and, moreover, it is so arranged as not to project above the upper surface of said movable part, so that it will not interfere with the work laid thereupon. The saw-guide O is supported from a split sleeve 0, encircling a vertical post or standard c and arranged to be clamped firmly therearound by means of the thumb-screw 0 passing through lugs 0 formed on said sleeve. A clamp D is arranged toslide up and down a standard (1, secured to the movable part A of the base of the miter-board, and this clamp is provided with a pair of sliding blocks d, which can be pressed firmly down upon the work by means of the thumb-nut (1 upon said standard d.

In order to clamp the work firmly against the guide-bars B B, I provide eccentric clamps E, which can be inserted in holes 0, made for the purpose in the movable part A of the base, as illustrated in Fig. 2.

Having now particularly described and ascertained the nature of my invention and in what manner the same is to be performed, I declare that what I claim is 1. In a miter-board, the combination, with the base or board and the adjustable guidebars B, of a standard, a clamping-bar adjustable on the standard, and clamping blocks or shoes adjustable longitudinally of the clamp ing-bar on opposite sides of the standard, for the purposes specified.

2. In a miterboard, the combination, with the base or board formed in two parts adjust able relatively to one another, and adj ustable guide-bars B on one of said parts, of a standard arranged between the guide-bars, a. clamping-bar adjustable on the standard, and clamping blocks or shoes adjustable longitudinally of the clamping-bar on opposite sides of the standard, for the purposes specified.

3. In amiterboard, the combination, with the base, the adjustable bars B, and the adjustable clamping.- bar D, of the eccentric clamps E, adjustable relatively to the bars B, substantially as and for the purposes specified.

4:. In a miter-board the base or table of which is constructed of two sectione hinged through the slot of the quadrant for locking together, the combination,with the section A, the same to said leg, substantially as dethe guide-bars B, adj ustably connected therescribed.

- With,the Vertically-movable clampingbar 1), JOHN HENRY RO\VLAND.

havin clamping-shoes (Z', adjustable thereon, \Vitnesscs: and the quadrant a, of the section A, pro- 'WILLIAM HENRY CUBLEY,

Vided with a leg a and a set-screwextending \VALTER SM'YTHE BAYSTON.