US28859A

US28859A - Carpenter s square

Info

Publication number: US28859A
Authority: US
Publication date: 1860-06-26
Anticipated expiration: 1877-06-26

Description

J. HATHEN.

'Carpenters Square.

No. 28,859. Patented June 28, 1860.

nan 5 5 4 #710 UNITED STATES PATENT orrron JAMES HATHEN, OF PHILADELPHIA, PENNSYLVANIA.

CARPENTERS SQUARE.

Specification of Letters Patent No. 28,859, dated June 26, 1860.

To all whom it may concern:

Be it known that I, JAMES I-IA'rHnN, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Carpenters Squares; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1, represents a side view of the improved square. Fig. 2, shows a back view of the stock of the same. Fig. 3, a cross-section taken through the stock, showing the interior attachment of the blade to the stock.

Similar letters of reference indicate corresponding parts in the three figures.

The objection to the present carpenters or joiners square, which it is the object of my invention to remedy, is that the blades are liable to become loose in the stocks and thus destroy their accuracy, besides, the squares themselves soon wear out of true, or become so by careless management, and with the present plan of attaching the blade to the stock, no provision has been made to set them again.

My invention consists in attaching the blade to the stock by one or more adjustable screws, applied at either end of the stock, and in connection with a clamping plate or plates, and a pivot connection of the blade,

'made to secure the blade fixedly in its proper right angular position, and to adjust the blade in case it should be out of true, as will be hereinafter described and represented.

To enable those skilled in the art to fully understand my invention, I will proceed to describe its construction and operation.

The squares will be made of the same shape and proportions as those at present used, and in the present plan of attaching the blade or tongue to the stock, all will be contained within the stock and out of sight except a thumb screw, which will not be in the way in the least, in using the square.

A, represents the blade or tongue, both edges of which are exactly parallel to each other, in one end of which, a T-shaped slot is punched out as shown in Fig. 1.

B, is the wooden stock with the usual metal face-plate a, secured to one edge, that edge that abuts against the work to be squared. One end of this stock B is mortised out, forming a recess C. The usual slit is now out transversely into the end of the stock for receiving the blade A. The blade is now introduced into the slit in the end of thestock, and placed in a proper position, when two holes are made through the stock and blade at suitable points and pins 0 0 passed through them, and if necessary, riveted on each side. It is a fact well known that these holes cannot be made, and the pins inserted through them, with any great accuracy, the

.blade will move more or less out of true, and

it is desirable to apply some simple and cheap means for setting the blade after the pins are inserted through it and the stock. To this end I employ a slotted piece of metal J, having a shoulder on its lower end, on which the lower edge of the tongue or blade A, restsa piece being cut out of the blade to allow it to fit well down on the beveled shoulder of piece J, and to keep the piece from slipping out of its place. This piece J, terminates at its upper end in a screw g, that projects above the head of the stock B, and into the T-slot as shown in Figs. 1 and 3, and receives a milled nut h, which presses on the head or end of the stock B,when screwed up, and draws upon the blade A. It will thus be seen that to set or fix the blade at an exact angle, after the pins have been inserted that secures it to the stock, it is only necessary to turn the nut h, when the blade may be drawn or forced to its proper position to a nicety, and it may afterwards be kept so.

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

The use of one or more adjusting clamps J, attached to either end of the square stock, and made to serve in conjunction with the pins 0, and c, for securing the blade to the stock, and setting the same in a proper position, substantially as described and represented.

. JAS. HATHEN.

Witnesses:

THEO. SHOEMAKER, CHARLES DIss'roN..