US1995658A

US1995658A - Bevel square

Info

Publication number: US1995658A
Application number: US513214A
Authority: US
Inventors: Thompson Christie
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-02-03
Filing date: 1931-02-03
Publication date: 1935-03-26
Anticipated expiration: 1952-03-26

Description

March 26, 1935. THOMPSON l 1,995,658

' BEVEL SQUARE 'g FiledFebl 5, 1931 'BY' MHS,

ATTORNEYS.

Patented Mar. 26, 1935 ori-ica BEVEL SQUARE Y Christie Thompson, Los Angeles, C'alif. I Application February 3, v`1931, Serial No. 513,214

"6 claims. (c1. 33-91) My invention relatesto and has for a purpose the provision of a bevel squarepartieularly adapted although not necessarily for use in roof framing or asa bevel vor angle-finder,l andrstructurally characterized in such manner that in response to setting o an indicator to indicate a predetermined rooi pitch, `the'device willautomatically vadjust `to theangles corresponding to the correct plumb and side'cuts to be taken on various classes of rafters in accordance with the indicated roof pitch', all to the endlof greatly facilitating laying out yof the work by eliminatingv mathematical computations and insuring accuracy in the work.

I It another purpose of my invention to provide a device. of .1 the above described character which will give an indication in terms of units of length such as the length of rafter required per running foot in accordance with the roof pitchV vto which the indicator isset so that the length of the rafter can be readily computed. I

I will describe only one form oi bevel square embodying my invention, and will then point out the novel features thereof in claims.

In the accompanying drawing:`

Figure lis a viewshowing infront relevation one form of bevel square embodying my invention.

Figure 2,'isV Va view of the bevel square in side elevation.,

Figure 3 is a longitudinal sectional View taken onthe Vline 3-3 of Figure land looking in the direction ofthe arrows. Y

Figure 4 is affragmentaryof a portion ofthe bevel square in'reverse side elevation.

Figure 5 is a transverse sectional view taken on the line-*5 5 of Figure 3 and looking in the direction of the arrows.

Referring specificallyto the drawingin which similar reference characters designate similar parts in each of the several views, my invention in its present embodiment comprises two members relatively adjustable angularly, one of the members constituting Va stock-A S provided with a vlongitudinally extending recess 10, and the other member constituting a blade B pivotally mountf ed in the recess at one end of the stock by means of a pin llsecured in the stock and-a bushing l2 journaled on theY pin Yand secured in the blade.

Thev bevel square also includes a pair 'of members in the'form ofV blades B' and B2 which are angularlyA adjustable oppositely `relative Ato the `stock S. To this end the blades B and B2 are pivotally mounted on the stock by means of a pin l'constituting a common axis for the blades by which the latter are rendered angularly adjustable relative to the stock in a plane at a right angle to the plane of adjustment of the blade B. The pin 13 extends freely through an opening in the stock into the recess and, terminates at its inner end in a ring 14 receiving the bushing 12 at one side of the blade B. AThe outer end of the pin which extends through openings in the blades B and B2, is threaded at 15 to receive a nut 16 having a knurled head by which the nut' can' be readily turned. When loosened, the nut permits unrestricted pivotal movements of the several blades, whereas when tightened, the nut clamps theblades B and B2 against the stock by Vdrawing the ring 14 into snug engagement with the bushing 12 and thus co-acts with the pin 13 to secure the blades in a selected position of adjustment. v v

An indicator I in the form of a cylindrical body 17 is slidably mounted in a bore 18 extending longitudinally in the stock S and communicating -with the bottom of the recess 10. The body 17 .is provided with a lateral projection 19 co-extensive in length with the body and Working in a slot20 extending longitudinally in the stock and communicating with the bore 18.

The bodyV 1'7 of the indicator is provided with a lug 21 to which is pivotally connected at 22, one end of'a link 23, the other end of which is pivotally connected at 24 to the blade B. From the body 17 also projects pin 25 which extends through the slot 20 and has pivotally connected thereto one end of each of two

links

26 and 27,

the other ends of thelinks being pivotally connected at 28 and 29 to the blades B and B2 respectively as shown in Figure 1. v

`The indicator I broadly constitutes an actu-z ator, and the

links

23, 26 andr27'ran operative connection between the indicator and the blades B, B and B2, by means of which actuation of the indicator will effect angular adjustment of the blades with respect to the stock, the blades 1 The lengths 'of the several links and the distances B at an angle corresponding to that of thD correct plumb cnt to be taken on hip and valley rafters, the blades B' andB2 will adjust to the angles corresponding to the correct right and left hand` side Vc utsvto be taken on these rafters.

To enable the indicator to be correctly :set in accordance with diiferentroof pitches, theprothe frontsurface of the stock S and is provided with a transverse index mark 30 (Figure 1) adapted to be aligned with the graduations of either Vjection 19 of the body 171s disposed iiush with Y of two

roof pitch scales

31 and 32 formed on the stock at opposite sides of the slot 20. The scales are graduated and numbered in inches rise per foot, the scale 31 being employed for common rafters and the scale 32 for hip and valley rafters.

The graduations of the

scales

31 and 32 are prolonged on opposite sides of the stock to provide

other scales

33 and 34 respectively, the indicia of which designate the length per running foot of rafters in accordance with the setting of the indicator with respect to the

roof pitch scales

31 and 32.

The pin 25 is threaded on its free end at 35 and receives a thumb nut 36, which when tightened, co-acts with washers 37 on the pin to clamp the indicator in a selected position of adjustment and thus co-acts with the nut 16 to secure the several blades in xed positions.

It will thus be manifest that by setting the indicator to align its index mark with the particular graduation on the scale 31 designating a predetermined roof pitch, that the blades B, B and B2 will angularly adjust to the respective positions wherein the angle of the blade B relative to the stock will correspond to that of the plumb cut to be taken on a common rafter, whereas the angles of the blades B' and B2 relative to the stock will correspond to those of the side cuts to be taken on the jack rafters. Also that upon setting of the indicator to align its index mark 30 with the graduation on the scale 32 designating the predetermined roof pitch, that the blades will angularly adjust for the angle of the blade B to correspond with that of the plumb cut to be taken on hip and valley rafters, and the angles of the blades B and B2 to correspond with those of the right and left hand side cuts to be taken on these classes of rafters. It Will be understood however, that these angles will be correct only for even pitched roofs.

Although I have herein shown and described only one form of bevel square embodying my invention, it is to be understood that various changes and modifications may be made therein without departing from the spirit of thev invention and the spirit and scope of the appended claims.

I claim:

1. An angle nder having a stock and a blade angularly adjustable with respect to the stock, means for indicating roof pitches including an indicator movably mounted on the stock, means operatively connecting the indicator and blade by which actuation of the indicator to indicatea predetermined roof pitch will adjust the blade to the angle of the plumb cut to be taken on a rafter for the indicated roof pitch, a second blade adjustable angularly with respect to the stock, and means operatively connecting the indicator and second blade and by which actuation of the indicator to indicate said predetermined roof pitch will adjust the second blade to the angle of the side cut to be taken on the rafter.

2. An angle nder having two members angularly adjustable with respect to each other, indicating means including an indicator movably mounted on one member, means operatively connecting the indicator and other member, and by which actuation of the indicator will adjust one of the said members angularly to the other member, a third membervangularly adjustable with respect to said one of the members in a plane at an angle relative to the plane of adjustment of said two members, and means operatively conconnecting the indicator and third member and by which actuation of the indicator will angularly adjust the third member in a predetermined proportion relative to the adjustment of said other member.

3. An angle finder having a stock and a blade pivoted on the stock for adjustment angularly with respect to the stock, an indicator movably mounted on the stock, means operatively connecting the indicator and blade and by which actuation of the indicator will effect a predetermined adjustment of the blade, a second blade pivoted on the stock for adjustment angularly with respect to the stock, and in a plane at a right angle to the plane of adjustment of the first blade, and means operatively connecting the indicator and second blade and by which actuation of the indicator will eiect adjustment of the second blade in a predetermined proportion to the adjustment of the first blade.

4. An angle nder having a stock and a blade pivoted on the stock for adjustment angularly with respect to the stock, an indicator slidably mounted in the stock for movement longitudinally of the latter, a link pivotally connecting the indicator and blade and by which actuation of ythe indicator will effect a predetermined angular adjustment of the blade, a pair of blades pivotally mounted on the stock for angular adjustment to opposite sides of the stock, and links pivotally connecting the indicator and pair of blades and by which actuation of the indicator will effect equal adjustment of the pair of blades oppositely and in a predetermined proportion to the adjustment of the first blade.

5. An angle finder having a stock and a blade pivoted on the stock for adjustment angularly with respect to the stock, an indicator slidably mounted in the stock for movement longitudinally of the latter, a link pivotally connecting the indicator and blade and by which actuation of the indicator will effect a predetermined angular adjustment of the blade, a pair of blades pivotally mounted on the stock for angular adjustment to opposite sides of the stock, links pivotally connecting the indicator and pair of blades and by which actuation of the indicator will effect equal adjustment of the pair of blades oppositely and in a predetermined proportion to the adjustment of the first blade, and means for securing the blades in selected positions of adjustment.

6. An angle finder comprising two members angularly adjustable relatively, roof pitch indicating means including a movable indicator, means whereby actuation of the indicator to indicate a predetermined roof pitch will adjust the members relatively to the angle of the plumb cut to be taken on a rafter in accordance with the indicated roof pitch, a pair of members angularly adjustable oppositely with respect to one of said two members, and means whereby actuation of the indicator to indicate said predetermined roof pitch will equally adjust the pair of members oppositely so that the angle formed by one of the said pairl of members and said one of the two members will conform to the angle of the side cut to be taken on the rafter.

' CHRISTIE THOMPSON.