US436759A - Manufacture of carpenters squares - Google Patents

Description

2 Sheets-S heet 1.

(No Model.) I

Y H. K. JONES.

MANUFACTURE OF GARPBNTERS' ISQUARES.

No. 436,759. Patented Sept. 16, 1890.

2 SheetsSheet 2.

(No Model.)

H. K. JONES. MANUFACTURE OF CARPENTERS SQUARES.

Patented Sept. 16,. 1890.

. UNITED STATES PATENT QFFICE.

HORACE K. JONES, OF HARTFORD, ASSIGN OR TO RUSSELL 8c ERWIN MANU FACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT.

MANUFACTURE OF CARPENTERS SQUARES.

SPECIFICATION forming part of Letters Patent No. 436,759, dated September 16, 1890.

Application filed March 2, 1883- Serial lfIo. 86,840. (No model.)

To all whom/it may concern:

Be it known that I, HORACE K. J ONES, of Hartford, in the county of Hartford and State of Connecticut, have invented a certain new and useful Improvement in Rolls Employed in the Manufacture of Carpenters Squares, whereof the following is a specification, reference being had to the accompanying drawings, wherein-- Figures 1 and 2 respectively illustrate in front View and in side view, partially sectional, a set of rolls embodying my invention. Figs. 3 and 4, Sheet 2, are diagrams illustrating the cam-shaped character of the bottom roll requisite for producing straight inclines, as in rolling my blanlebars, and they also indicate the difference between the operation of an eccentrio roll and a cam-shaped roll.

In the manufacture of carpenters squares as at present practiced the manufacturer of the steel puts his stock through different sets of rolls, usually three in number, until it is finally of a uniform width and thickness, the cross-section thereof being rectangular. In this condition the stock is shipped from the steel manufacturer to the square manufacturer, who cuts the long bars int-o blanks of suitable length, then heats them and passes them through a set of rolls, which lengthens the blanks and tapers them from one end to the other so far as thickness is concerned,but does not materially affect them widthwise.

The present improvement, concisely stated, consists in rolls of peculiar form for the man ufacture of carpenters squares by rolling the long bar into a series of connected tapers by means of said rolls,which are formed as more particularly hereinafter described, and then separating the series, the result being a very considerable saving in the cost of the square. As the manufacturer of the steel can about as readily produce the bars in this form of a series of connected tapers as in the old form, and whether the work be done by the steel manufacturer orby the maker of the squares, it is more economical to treat the bar at once than it is to treat each bar separately under the rolls, and there is the additional advantage that in the case of rolling the bar into tapered blanks each taper is more perfect than in the case where each blank is separately op erated upon. In Fig. l I illustrate a pair of my rolls. The upper roll is regular or concentric in shape. The lower roll is cam'shaped. The stock before passing through these rolls is of substantially uniform Width and thickness. After passing through the rolls it is in a series of connected tapers, as illustrated in Fig. 2. The dotted lines show how the tapers are to be separated subsequently into blanks. (It may as well be explained here that a carpenters square is composed of two blanks Welded together at the angle of the square, each of which blanks is separately tapered in the manner referred to herein.) 7

In the accompanying drawings, the letter a denotes the frame of the roll-press as a whole; I), the driving-shaft bearing the gear-wheel c in mesh with the gear-wheel d, fast to the shaft of the other roll; e and firolls borne in bearings in the frame with the ordinary means g, consisting of sliding bearings and screwshaft, by means of ,which the distance be tween the faces of the rolls is determined. Broadly stated, these parts are old and of ordinary construction; but one of the rolls f is cam-shaped, the space between the rolls constituting a continuously-open pass for the reception of the metal bar from which the blank bar is to be developed, so that as the rolls are rotated the distance between the faces of the rolls 6 and f increases and decreases in a degree dependent upon the peculiar outline of the roll f.

The letter h denotes a bar of metal, as iron,

which, having been broken down and formed to the desired outline in the ordinary rolls, is then passed between myimproved rolls,which form an irregular-shaped piece h, which may be termed a series of blanks 712, which blanks are formed bycutting the connected series on the lines indicated by the dot-ted lines as in Fig. 2 of the drawings.

My improved rolls may be made a part of a gang of rolls and coupled to the series, so as to be driven with it, and the single heating of the bar utilized and the series of blanks rolled without reheating.

It will be seen that each blank 72. is inclined in a straight line from butt to tip, and that in the blank-bar the blanks are butt to butt and tip to tip. This inclination in each blank is essential in the manufacture of carpenters squares, and said inclination can only be produced by a cam-shaped roll, substantially as laid out in the diagram, Fig. 3, on the line i, and varying therefrom only in the size of the roll and in the degree of inclination required on one surface of the blank. The line 70 of Fig. 3 indicates one-half of the circular path of that part of the roll which is farthest from its axis, said path corresponding with the surface of the upper roll and also with the baseline 70' of Fig. 4. The line 2" in this Fig. 4 corresponds with the line 'i of Fig. 3. The dotted lines of Figs. 3 and 4:- indicate, respectively, one-half of an eccentric roll, and the contour of a blank which would result from the use of such a roll, such ablank being absolutelyunfit for the manufacture of carpenterssquares, because of the swell or bulge at l in Fig. 4:,Whi0h would cause a square to swivel or turn when laid flatly on wood or stone, and employed in scribing and laying off work in a manner common to the use of squares.

I claim as my improvement 1. The combination, substantially as hereinbefore described, of the concentric roll and the roll f, having, essentially, the variable contour and dimensions described, which afford between it and said concentric roll a pass for shaping a connected series of blanks for carpenters squares, and means for driving said rolls.

2. The combination, substantially as hereinbefore described, of a concentric roll and a cam-shaped roll geared together and aifording between them a continuously-open pass, which during each complete revolution of said rolls is gradually decreased in vertical dimensions, and will develop a bar of metal into a blank-bar composed of a connected series of gradually inclined blanks for carpenters squares, said blanks being butt to butt and tip to tip, as described.

. HORACE K. JONES. Witnesses:

CHAS. L. BURDETT, WM. H. MARSH.

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