US1821103A

US1821103A - Roof framing tool

Info

Publication number: US1821103A
Authority: US
Publication date: 1931-09-01
Anticipated expiration: 1948-09-01

Description

p 1, 1931- E. LUGINBUHL 1, 03

ROOF FRAMING TOOL Filed Jan. 21. 1929 2 Sheets-Shem 1 DIFFERENCE IN LENGTH OF common RAFTERS JACKS 16"cimER m mcnss 10 PIER roor mm m INCHES INVENTOR. ELIAS LUGINBUHL.

w ATTORNEY.

Sept. 1, 1931. E. LUGINBUHL ROOF FRAMING TOOL Filed Jan. 2;. 1929 2 Sheets-Sheet 2 COMMON RkFTERS PER FOOT RUN m DIFFERENCIE mL sne m 0F JACKS 1s c sm' ER 1N INCHES INVENTOR. ELIAS LUGINBUHL.

X 'ITORNEY III Patented Sept. l, 1931 UNHTED STATES ELIAS LUGINIBUHL, OF NOIIEGWOOID, OHIO ROOF FRAMING TOOL Application filed January 21, 1929. SeriaLNo. 333,874.

The invention relates to an improved roofframing tool for the purpose of measuring, computing the lengths and marking the proper angles on common, hip, valley and jack rafters.

The object of the invention is to provide the tool with automatic means for setting the wing markers relative to the rise of the roof desired, to be used in marking the proper cut to be made on jack rafters. A further object of the invention is to provide the tool with an adjustable angle member, for marking the end angle on rafters and controlling the wing members. A further object is to provide the tool with miter angles when the angle member is on the zero mark, or at right angles to the vertical edge of the body-members, which position will set the automatic wing markers at forty-five degrees with relation to the plane of the face of the body-member. With these and other objects in view the invention will be further readily understood from the following description and claims, and from the drawings, in which latter Fig. 1 is a side elevation of my improved device.

Fig. 2 is a plan view of the same. 7

Fig. 3 is an end elevation of the same.

Fig. 4 is a side elevation on a reduced scale showlng the opposite side of that shown in Fig. 1.

Fig. 5 is a detail section taken inthe plane of the irregular line 5-5 of Fig. 1, partly broken away.

Fig. 6 is a side elevation of my device, shown in adjusted position, and;

Fig. 7 is a plan View of the same, partly broken away. 7

In the building of roofs, rafters requiring different angles are necessary, particularly in roofs of more than two faces. The rafters used are generally termed common, valley, hip and jack rafters. The jack rafters require a vertical angle and a horizontal angle at the point of contact with the hip or valley rafter. It is for this purpose that the invention is particularly useful.

My device comprises a body-member 11, forming asquare with a base 12, a leg 13, and an arcuate extension 14.

Angle bars

15, 16 comprise bases 17 and vertical flanges 18. The flanges 18 are positioned back to back wlth a space 19 between them, and the bases 17 extending outwardly. I have shown a plate 20 secured to the lower faces of the bases 17 by means of rivets 21, although any other means may be employed such as spot welding if desired.

The arcuate extension 14 is received in the space 19 between the respective angle bars. Ends 22 of the flanges 18 of the angle bars straddle the upper end 23 of the leg 13 and are pivotally connected thereto by means of a screw 24 received through holes in one of the flanges and the upper end of the leg 13 and threaded into the other flange.

Thearcuate extension 14 is provided with an arcuate slot 26, a bolt 27 is received throughholes in the flanges 18 and the slot 26, a wing nut 28 is threaded over the thread- 1. ed end 29 of the bolt 27 to clamp the angle bars to the arcuate extension. Releasing the wing nut the angle bars can be adjusted to any desired angle within the limits of the arcuate slot.

Horizontal wings

30, 31 are pivoted about a stud 32 received in a hole 33 in the leg 13, and in holes 34 in

lugs

35, 36 extending from the angle wings 30, 3h The holes 34 in the lugs are slightly larger than the stud to per- L mit rocking motion about the stud. The stud 'is provided with turned over heads 37 to maintain the parts in operable relation.

The bases 17 of the

angle bars

15, 16 are cut away as instanced at 38 adjacent to the wings to prevent interference with the marking edge 39 of the wings, when the wings are moved inwardly.

Studs 41 secured in holes 42 in the

wings

30, 31 extend through angular slots 43 in the bases 17 heads 44: on said studs prevent disengagement of the parts.

The face of the arcuate extension 14 is provided with graduations 45, indicating the angle corresponding to the rise in inches of the desired roof. A scale 46 indicates the length of the common rafters per foot run in inches. A scale 17 indicates the difference in length of jack rafters set at sixteen inch centers. On the reverse side of the extension a scale 48 indicates the length of valley or hip rafters per foot run in inches.

For an example, aroof with a seven inch rise is to be built, the wing nut 28 is released and the angle bars are moved until the face 49 coincides with the line on the scale l5 opposite 7, (see Fig. 6) the reading on the scale 46 at this point will give the exact length of the common rafters per foot run. is then placed adjacent to the face 19 and the edge 50 of the leg 13 is used to mark the angle on which the cut is to be made.

The reading opposite 7 on the scale as on the reverse side of the body-member, gives the length of the hip and valley rafters, per foot run together with the proper angle at which to cut the rafter. Jack rafters for a 7 inch rise roof are computed on the face of the body-member by reference to the scale 47, which gives the diiierence in length of each succeeding rafter.

The acl; rafters meeting the other rafters at an angle require a horizontal and a vertical angle at their point of contact. The vertical angle is marked similar to the common rafters. The horizontal angle is marked by means of the marking edge on the wings 80, 31. It will be noted that the point of articulation for the angle bars and the wings are separated, thereby causing the wings to move toward the angle bars as the angle bars are moved downwardly from their zero position, the wings moving toward the angle bars are drawn inwardly due to the studs 41 moving in the slots 43. nus with the base of the angle bars registering with the seven inch rise'iine, the angle wings will have been moved inwardly the proper distance, whereby the edge can be used to mark the angle at which to cut the horizontal angle of the jack rafters. (See Fig. 7.)

WVhen the angle bars are moved to the zero position as shown in Fig. 1, the edges 39 of the wings are at exactly forty-live degrees with relation to the face of the body-member and can be used to mark miter cuts.

From the foregoing description it will be readily seen that l have devised a simple and practical tool requiring but a single setting to frame a roof with a minimum amount of calculation.

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

1. In a device of the character described,

The rafter comprising a body-member, angle members pivoted to said body-member, wing members pivoted to said body-member and having slide connection with said angle members, whereby movement of said angle member will cause movement of said wing members therewith and in a transverse plane thereto.

2. In a device of the character described, comprising a body-member provided with indicia thereon, angle members pivoted to said body-member, wing members pivoted to said body-member, said pivot spaced from the pivot of said angle members and means for moving said wing members in a transverse plane to the movement of said angle members, and controlled by said angle members.

3. In a device of the character described, comprising a base, a leg extending at right angles tosaid base, angle members )ivoted to said leg, an arcuate extension extending from said base concentric with the pivot of said angle members, said angle members strad- *dling said leg and said arcuate extension,

wings pivoted to said leg and provided with marking edges, means connecting said wings with said angle members whereby movement of said angle members will cause movement of said wings in a transverse plane.

a. In a device of the character described, comprisinga base, a leg extending at right angles to said base, angle members pivoted to said leg, an arcuate extension extending from said base and provided with a slot concentric with the pivot of said angle members, and means for clamping said angle members to said arcuate extension, wings pivoted to said leg and provided with marking edges, means connecting said wings with said angle members whereby movement of said angle members will cause movement of said wings in a transverse plane, and said arcuate extension provided with indicia adjacent said slot.

5. In a device of the character described, comprising a base provided with an extending leg and an arcuate extension, an angle member pivoted to said leg, said arcuate extension being concentric with said pivot, a plate secured to the base of said angle member, a wing member in the plane of said plate pivoted to said leg, said pivot being spaced from the pivot of said angle member, sliding connection between said angle member and said wing member whereby movement of said angle member will cause movement of said wing member with and in a transverse plane to the movement of said angle member.

6. In a device of the character described, comprising a base, a leg extending from said base, an arcuate extension extending from said base and provided with a slot therein,- an angle member pivoted to said leg on a common axis with said arcuate extension, means for clamping said angle member to said body portion, a wing member pivoted to said leg at a point removed from said com- ELIAS LUGINBUHL.