US1272919A - Nut or rivet holder for sheet metal. - Google Patents

Description

J. CRAWFORD.

NUT 0R RIVET HOLDER FOR SHEET METAL.

APPLICATION FILED MAR-27.1918.

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Specification of Letters Patent.

Patented July 16, 1918.

Application filed March 27, 1918. Serial No. 224,974.

To all whom. it may concern:

Be it known that I. JAMES CRAWFORD, a citizen of the United States, and a resident of the city of New York, Corona, borough of Queens, in the county of Queens and State of New York, have invented a new and Improved Nut or Rivet Holder for Sheet Metal, of which the following is a full, clear, and exact description.

This invention relates to sheet metal constructions and ha particular reference to means for connecting one sheet to another adapting the same for disconnection if desired.

of the invention is to provide a means whereby a man working alone is enabled to rigidly secure two sheets together, the operation being performed from ,one side of the assemblage and without necessitating the operator or an assistant acting upon the other side of the assemblage.

' In the building of large sheet metal ventilating shafts or the like for example it is frequently demanded that one section be.

With the foregoing and other objects in I view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several'views, and in which Figure 1 is a fragmentary detail perspective view which may be understood as representing a large sheet metal ventilatingshaft having room within it for the operator to work. I

More definitely stated the primary object Fig. 2 is a vertical sectional detail on the line 22 of Fig. 1, but indicating the bolt prior to introduction into the nut.

Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 1.

' Fig. 4 is a detail plan view of a sheet showing the nut holding means in blank or prior to being swaged. or pressed out to receive the nut.

Fig. 5 is a similar view but showing the form or position of the nut holding means with the nut in place therein in dotted lines.

Fig. 6 is a detail view of a modification in which the screw is held by one of the sheets in place of the nut, the section being in a plane corresponding substantially to that of Fig. 2.

Fig. 7 is a detail view of the blank adapted to hold the screw or other analogous fastening device such a shown in Fig.6, the figure being otherwise similar in character to Fig. 4.

Fig. 8 is a. View showing the next step from the blank of Fig. '7, but otherwise of thei same character as the view of Fig. 5; an

Fig. 9 is a detail view showing a rivet as the fastening member held or carried by the slitted sheet.

'Assuming that 10 and 11 are adjacent sections of a sheet metal flue or shaft to be rigidly -connected at their overlapping ends and having sufiicient capacity for the workman to be located therein, my invention is practised in the following manner, orits equivalent: When designing or building the several sections in the sho or elsewhere one of the sections, being indlcated as the outer section 10, is punched or stamped in such a manner as to constitute a holding means for a nut 12 on the side remote from the other section or sheet as indicated in the first five figures. The sheet is slitted at 13 with short parallel slits spaced from each other at a distance substantially equal to the width of the nut. The metal on the opposite sides of these-short slits is subsequently bent or swaged out as indicated at 14 forming lugs which serve to positively hold the nut from slipping in the direction of either of these lu'gs.'- A 'pair of longer slits 15 likewise parallel to each other also are formed between the slits 13 leaving between the several slits 15 and slits 13 a pair of straps 16. The length of'the slits 15 is approximately equal to or a trifle greater than the Width of the nut. The metal between the slits 15 is again slitted at 17 preferably with a cut oblique to the center line joining the slits 13 thereby forming two tongues 18, each having a diagonal end. The the formation of this holder is to bend.or swage out the tongues around bending lines 19 thus providing a pocket for the nut where it will be held between the tongues in one direction and between the lugs 14 in the other direction. The free ends 20 of the tongues are then bent down upon the nut positively locking the .nut in place. The form of the tongues obviously may be varied according to the thickness. of the nut or other conditions, but by beveling the, same as indicated I provide a maximum" grip upon the outer surface of the nut and yet leave the hole 12 in the nut unobstructed for the introduction of the screw or bolt 21. The straps 16 remain fiat or in their natural form and serve to positively support the inner face ofthe nut and yet provide a clear space through which the screw or bolt may pass. It will be understood that this work of forming the nut holder and fastening the nut therein will be performed in the shop under ordinary practice.

The coiiperating sheet or section 11 will be punched with an ordinary hole 22 to register with the nut hole 12' when the sheets are assembled so all the operator has to do in completing the connection'or fastening of the sheets or sections is to locate the registering holes and introduce the nut or screw 21 which obviously may be inserted with a screw driver or other analogous tool and from the side of the joint or assemblage op-' posite the nut, the nut being positively held an place and from rotation by the lugs 14 and tongues 18.

It will be understood that the particular character of the fastening device may be varied to a considerable extent and similarly lock the specific character of is subject to considerable modification without departing from the broad spirit of my invention. In Figs. 6, 7 and 8, for example, I show a sheet 10' slitted at 15' which in connection with the oblique slit 17 will form two ton es 18'. When the tongues are bent outwar around bending lines 19 there is provided an open slot 23 through which the shank of a fastening screw, rivet or the like may ass, while the head thereof will be permanently in place by the bending down of the free ends of the The opposite sheet 11 will simply be provided with a holeto registerwith and receive the point of the screw or rivet after which the operator stationed only on one next step in a the holding means tongues 18'.

may be readily effected by the operator from.

the other side. Also in many instances it is required to fasten together end to end' a series of sections of sheet metal pipes or the like of such length or small diameter as to make it impossible to reach therein for the purpose of effecting the fastening. Therefore, under. such conditions the inner section will be provided with that part of the fastener that maybe regarded the fixture such as the nut 12 in Fig. 3 orthe screw 21 in F ig., 6, and the remaining part of the fastener will be put thereon from the outside.

The fastening member is shown in Fig. 9 in the form of a rivet 21 by the tongues 18, the shank of the fastener vpassing through the slot 23 so that the end of the rivet may pass through the hole provided for this purpose in the companion sheet 11. This adaptation of the invention is especially useful for connecting the lengths of small pipes.

I claim:

1. The herein described sheet metal joint,

one sheet being provided with two parallel slits and a 'slit extending from one slit to the other of the parallel slits, thus forming two free ended tongues which when bent outward from the plane of the sheet-form an open slot for the passage of the shank of a fastener, a two art fastener, one part of which is adapted to be gripped within and between said tongues while the other. part of the fastener may be attached thereto solely from the other side of the other sheet remote from the tongues.

2. The combination with a pair of sheets to be connected, one sheet having a pair of slits parallel to each other, the metal on the opposite sides of the slits being bent outward forming lugs and being provided also with a pair of free ended tongues formed between said slits, the ton ues being spaced from each other substantially equal to the distance between said lugs and forming an open slot. a two part fastener, one part of which is located between said lugs and between ,the tongues and locked rigidly from movemfent inanydirection with'respect to the sheet-by the tongues, and the other sheet being provided with a' hole registering with said slot whereby the other member of the fastener may be passed through the hole and slot and into the locked part of the fastener.

whose head is held with a pair of slits tending from one of and a transverseslit exthe aforesaid slits to the other in 'a dirwtion oblique to either of the the shank of a fastening member and the first mentioned slits, the slitted metal when tongue ends being sufliciently spaced from bent outward thus forming two free ended each other for the same purpose, and a fas- 10 tongues, the end of each tongue being diagtening device cooperating with said slitted 5 onal to the main part of the tongue, the sheet. slitting and the outward bending forming. an open slot in the sheet for the passage of JAMES CRAWFORD.

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