US378387A - Rafter-gage - Google Patents

Description

J. N. GRUSON.

RAFTER GAGE.

(No Model.)

No. 378,387. Patented Feb. 21, 1888.

INVENTOR ATTORNEYS.

AliET @rrrcn.

JOHN N. CRUSON, OE ELIZABETHTOWN, ILLINOIS.

RAFTE R GAGE.

SPECIFICATION forming part of Letters Application tiled May 1-2, 1887.

To aZZ whom it may concern.-

Be it known that 1, JOHN N. Causes, of Elizabethtown, in the county of Hardin and State of Illinois, have invented a new and useful Improvementin Rafter-Gagespf which the following is a specification.

My invention is an improved gage,intended especially for aidingin determining the length and bevels of hip and jack raiters commonly used in hip'roofs.

The invention consists in certain features of construction and novel combinations of parts, as will be described and claimed.

In the drawings, Figure 1 is a perspective view of the improved gage. Fig. 2 shows the adjustable bevel as applied to a beam in order to mark the same for cutting. Fig. 3 is a detail view showing the adjustable and sliding bevels as applied to a beam. Fig. 4 is adetached section on line as m, Fig. 1; and Fig. 5 shows the framing ofa hip-roof.

The base A is graduated in two directions I at a a, the lines of graduation running at'right angles to each other. To this base I pivot at I) one end of a bar, 13, and such bar may be moved on said pivot across the base, or may have its free end elevated to any desired degree to be set at the required angle for the hiprafter. A slot, 13, is formed in the bar B, which latter I shall call the hip-bar, and such slot extends from a point near the free end of the bar almost to its center.

An upright, O, has a slot, 0, andis connected with the hip-bar by a bolt, 1), and nuts (2 d, the bolt having a central shoulder, d, and all being arranged, as shown in the drawings, so that the upright may be connected with the hip-bar at any suitable height and at any point along the slotted portion of said bar.

The double bevel E (see Fig. 2) has a stool; or bar,E,slottedat e e from its opposite ends. The short plate F is fitted at one end within the slot 0, and has a slot, f, for the passage of the bolt G, which has a nut, g, and serves as a clamp for securing the said plate in any de sired adj ustmcnt. To the end of plate F,l pivot Patent No. 378,387, dated February 21, 1888.

Serial No. 238,016. (X0 model.)

one end of plate F, the opposite end of which is movable through slot 0, and may be heldin any suitable adjustment by bolt H.

angle and clamped by the bolt and nuts D (Z d to the upright O. The double bevelE has its long blade or plate F rested on the base on any one of the graduations or divisions, the short bladeF,resting against the face of the hip-bar, coinciding with the down cut. The stock E is then brought down until the upper end coincides with the gage-line on the hip-bar, the lower end of said stock being against the base A,the bevel E being held plumb with the base and the clamps tightened. The angles, it'will be seen, are now secured. Retaining the bevel E still in the same position, a sliding bevel, I, is set with the face of the hip-bar and the side of the stock E,which gives the remaining cut.

The gageline for backing the hip-rafter may be found by taking the distance at the foot of the rafter from the top edge of rafter to the edge of base setgage, according to scale.

The different lengths of j ack-rafters are found by laying off the distance between rafters on the edge of the base and the hip-bar. The distance from the edge of the base to the gageline on bar B at the different divisions gives the different lengths of the jaclerai'ters.

It is believed that the improvement can be employed to advantage in stair-work as well as in the construction of hip-roofs.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- The improved gage herein described, consisting of the base A,t-he hip-ba1'B,pivoted at b to the base, the upright 0, connected adj ustably with the hip baiyand the bevel E, having stock E, blades F F, and clamps G H, substantially as and for the purpose specified.

JOHN N. GRUSON.

Witn esses:

J. M. LEDBETTER, JNo. L. Lownv.

In use the hip-bar is raised to the desired 0

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