US1791231A - Paper-hanger's straightedge - Google Patents

Description

Feb. 3, 1931. E. J. WOERNER 1,791,231

PAPER HANQER'S STRAIGHTEDGE 4 Filed Dec. 1, 1928 INVENTORf ATTORNEY.

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Patented Feb. 3, 1 931 UNITED sTAriEis; PATENT OFFICE-- EMANUELVJQW ERNEB, or CHICAGO, IL IivQIs PAEER-HANGERS S TRAI GH'EEDGE' Application filed December 1, 1928. Serial No. 823,042;

This invention relates to paper-hangers straight edges and" has for its-'primary obj ect the construction of such devices frommetal, preferably ofiduraluminum or stainless steel,

therebyrcausing them to be unaffected-by; heat an auxiliary member-,which are so assembled that the: auxiliary member will at all times reinforce-v and brace the primary member, whereby the straight-edgewill be true at all times. I 1

Another object of: this-'inventionis the con.- struction and" assembly of the straight edges so that the auxiliary member will: fit within the primary member, Wherebytheprimary member will be provided with protruding edges, thereby forming cutting edges and-permitting-the straight-edge, when inuse, to lie evenly: its entire length. 5 j

. i A still further and important-object of.

this invention is the production 0t straightedges possessed of the foregoingadvantages and; which are yet formed of a minimum number'of" parts, and therefore, may be produced at a: minimum expense.

With the foregoing and similar objectsv in View, this invention consists ofcertain. combis nations, arrangements and assembly of parts, as will be more fully set forth herein and will be fully illustrated in the drawings, wherein like reference numerals. will indicatev like parts in the several views, in which v Fig. 1 is abottomplanview of another embodiment of the presentstraight-edge, parts thereof being broken away;

Fig. 2; is a transverse sectional view through this embodiment of the straight edge, taken on the line 2--2 of Fig. 1;

"Fig. 3 is a top plan view of still another embodiment of the present invention,- parts thereof being broken away and Fig. 4 is a transverse sectional view of this embodiment of the straight-edge taken on the line 44 of Fig. 3.

Referring more particularly to the drawmember.

ings, the straight-edge includes the primary member A having th back 1 and'thewalls 2 having thecutting edges .3. Theauxiliary member B however, consists of a narrow elongated back 9-.having formed along its side edge portions thewebs 10, these webs 10 extending outwardly andv angula-rly from. the back 9, as clearly illustrated in Fig. 2. The inwardly extending narrow walls 11- are formed along the outer edge portions of the webs 10. Y

When tlfllSgfOIIIl-Of thestraight-edge is assembled the auxiliary member B" within the primary member A... At this time-the back9will engage-the inner surface of the back land the two backsare secured together by any suitable means, such as spotwelding, as shown at. 12. Thus the primary member and. the, auxiliary member will be fixedly held together to present arigid. uni.- tary construction. The angle of the websis such as to cause the junction of the Webs l0 and the walls 1 1; to be contiguous to but spaced from the cutting edges 3. of. the walls 2. i

Inthisstructure shown in: the drawings it will be seen that only twoelements are neces sary, the primary member and the auxiliary The auxiliary. member will be entirely within the confines of the. primary member, asclearlyillustrated. in Fig. 2 and for this reason will not interfere with the proper use of the primary member A. The formation of the auxiliary member B" will greatly reinforce the primary member, since thewebs 1 0 are-comparatively short in cross section and consequently are very rigid in their bracing action near the'edges 3 of the walls 2. Pressure on the outer surfacesof the walls 2 will be-resisted by the-wallsll of the auxiliary member; while contacting'and securing together of the backs 1 and 9 will increase the rigidity and strength of the primary and auxiliary members. The inset construction of. the auxiliary member B .will also permit the straightsedge to be easily gripped at all times. a

Attention is now invited to the modification of my invention, as illustrated, in Figs. 3 and; d, In this form the elongated back 13 will fit has a wall 14 formed at one side edge portion thereof and this wall 14 extends at right angles to the back 13. At the other side edge portion the back 13 has an angular extension 15 and this extension 15 has the secondary back 16 projecting therefrom in a plane parallel to but spaced from the plane of the back 13. A narrow wall 1'? is formed upon and extends at right angles to the secondary back 16. The wall 17 is parallel to the wall 14 but is narrower than the wall 14.

The auxiliary member D comprises a back 18 of rather narrow dimension and has extending from one side edge portion thereof the angularly extending web 19 which extends to a point near the edge 14 of the wall 14. The inwardly extending wall 20 is formed upon and extends from this outer edge portion of the web 19. A comparatively broad web 21 extends from the remaining side edge portion of the back 18 and this web 21 extends outwardly at an angle to the back 18 to a point near the edge of the wall 17, having formed thereon and extending inwardly therefrom the wall 22.

When the primary member C and the auxiliary member D are assembled the back 18 will bear upon the back 13, while the wall 20 will bear upon the wall 14 and the wall 22 i will bear upon the wall 17. The two memhers Will be held in this assembled condition by any suitable securing means, preferably spot-welding as indicated at 23.

In this form of straight-edge an apron E is provided. This apron consists of a supporting wall 24 having formed thereon and extending at right angles thereto the overhanging flange 25. The supporting wall 24 bears upon the outer surface of the wall 17 of the primary member G and is fixed in position by spot-welding, as indicated at 26. The edge 2? of the supporting wall 24 protrudes beyond the outer edge of the wall 17, while the oppositeedge portion of the supporting wall 24 extends beyond the outer sur face of the secondary back 16, whereby the flange 25 will extend in the same plane as the back 13 of t ie primary member C. The flange terminates at a distance from the angular extension 15, thereby forming a longitudinally extending groove F which will accommodate a wheel knife or paper cutting device, when the straight-edge is in use,

The two modifications of the straight-edge as herein described are very similar. They each consist of a primary member, within which the auxiliary member ispermanently fitted for the purpose of reinforcing the primary member. traight edges constructed according to this invention are more durable than the wooden straight-edges now in use. They will not warp due to heat, humidity, or dampness, this latter objection resulting in the use of all wooden straight-edges The straight-edges of the present invention are formed from sheets of metal, preferably duraluminum or stainless steel. Therefore, they are very light, the weight depending, of course, upon the sizes of the structures. The lengths and widths of the straight-edges of this invention may be increased or decreased as occasion demands, without departing from the spirit of the invention. Fur thermore, although these straight-edges present very eflicient structures for proper and ready handling and use, laying fiat throughout their entire lengths when in use, their simplicity of construction permits of their construction and assembly at a minimum of expense.

While I have specifically described and illustrated two modifications of my invention, it is obvious that changes may be made in the detail construction and assembly without departing from the spirit of the invention as long as such changes do not exceed the scope of the invention as claimed.

Having described the invention, what 'I claim as new is:

1. A straight-edge of the character described comprising a primary member, said primary member including an elongated back having a wall extending from one side edge portion at right angles thereto, an angular extension protruding from the other side edge portion of said back, a secondary back carried by said angular extension in a plane parallel to said first-mentioned back, a wall carried by said secondary back in a plane parallel to said first-mentioned wall, an auxiliary member comprising an elongated hack engaging the first-mentioned back of the pri mary member, webs extending angularly from the back of the auxiliary member, parallel walls carried by the outer edge portions of said webs, the walls of the auxiliary member engaging the walls of the primary member, an apron comprising a supporting wall and a flange, the flange extending at a right angle to the supporting wall, said supporting wall being fixed upon the wall of the primary member adjacent said angular extension, said fiange overhanging said second ary back and terminating at a distance from the angular extension of the primary member, thereby forming a longitudinally extending groove, as set forth.

2. A straightedge of the character described comprising a sheet metal primary member, said primary member consisting of an elongated back having parallel walls ex tending from and at right angles to its side edge portions, a sheet metal auxiliary member including an elongated hack having webs extending from opposite sides thereof, parallel walls extending at acute angles to and being carried by the outer edge portions of said webs, the back of the auxiliary member engaging the inner surface of the back of EMANUEL J. WOERNER.

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