US1297591A - Snap-lock. - Google Patents

Description

A. W. PRESCOTT.

SNAP LOCK. MHPLICATION FILED APR. 18. 1917.

A My ARTHURW.DPESCOTT A TTORNE Y8 L I INVENTOB S TES ARTHUR W. PRESCOTT, OF BINGHAMTON, NEW YQRK.

Patented Mar. 18, 1919.

Application filed April 18, 1917. Serial No. 162,888.

Be it known that I, ARTHUR W. Pnnsoo'rr, a citizen of the United States, and a resldent of Binghamton, in the county of Broome and State of New York, have invented new and useful Improvements in Snap-Locks, of l which the following is a specification.

My invention is an improvement in snap locks, and has for its object to provide alock of the character specified, especially adapted'for connecting the ends of sheet metal pipes and fittings or for locking a seam of any character, wherein the arrangement is such that the seam can be instantly and permanently locked without the use of tools, and without the necessity of soldering or setting down. In the'drawings: Figure 1 is a perspective view of the meetends of pipe sections provided with the improved lock;

Fig. 2 is an'end View of the connecting seam of the sectionsjin Fig. 1;

F' 3 is a sectional view of the seam showing a modified form of lock;

Fig. 4 is a perspective view of one of the members of the seam shown in Fig. 3;

Fig. 5 an end view of another modi- Y fication; and

Fig. 6 1s a perspective view of a modified form of locking lug.

The embodiment of the invention shown in Figs. 1 and2 is shown in connection with wall pipe sections 1 and 2, the improved lock being arranged to lockthe ends of the sections, and to also lock the side seam of the sections. It will be noticed from an inspection of Fig. 1 that each of the side walls of the pipe section 2 is provided with a species of gutter, formed by upon'the outer face of the side wall, as indicated at 3, and then.upwardly, as indicated at 4, and the free edge of the flange is bent inwardly and downwardly, as shown at- 5, toform a hook at the opening of the gutter. Each of the side walls, as before stated, is provided with this gutter and hook, and the side walls of the section 1 have struck-11p lugs or ears 6,, which are adapted to be slipped within the gutter, withthe edge of the side wall, and to engage beneath the hook 5 to lock the parts in place. Lateral movement of the walls with respect to each other is prevented by the engagement of the end walls of the pipe sections, and movement of the sections away from each other is absoback a flange I lutely prevented by the engagement of the lugs 6 with the hook. The side seams are connected in precisely the same manner, one of the edges of the sheet being bent backwardly on the outer face of the side edge of the sheet, as indicated at 7, and then forwardly toward the edge of the sheet, as indicated at 8, and the free edge of the portion of the outer wall 8 of the gutter has the hook 9 corresponding to the hook 5 at the ends of the pipe. The other side edge of the seam has the struck-up lugs or ears 10, and it will be evident that when this side edge of the sheet is slipped into the gutter formed by the walls 7 and 8 the lugs 10 will enga e the hook 9 to prevent displacement of t e connected side edges of the sheet.

In Fig. 3 is showna modified arrangement, wherein the side edges 11 and 12 of the sheet are both rovidedflwith gutters. The side edge 11 of the sheet has its free edge bent over upon the body of the sheet in spaced relation, as'indicated at 13, and the free edge of the said wall or flange has a hook 14. .The side edge 12 of the sheet has aportion 15 bent over upon the face of the sheet in spaced relation, and this portion or flange 15 has the struck-up. lugs 16. With this arrangement the outer walls or flanges of the gutters are slipped into each other, and the lugs, springing beneath the hook 14, hold the members together.

. In the embodiment of the invention shown in Fig. 5, one of the side walls 17 of the,

'21. With this arrangement the side edge 17 is pushed into the gutter 1920, when the lugs 21 swing beneath the hook to hold the parts in position.

In Fig. 6 a modified construction of looking lug 1s shown. In this arrangement, one side edge 22 of the seam has pairs of parallel slits in its edge, and the material between the slits is bent back, as indicated at 23, to form the locking lug. It is obvious also that the entire edge of the sheet may be turned back to form the lug instead of portions, as indicated in Fig. 6.

The lugs or ears 16 may be of any desired size or shape, and they may be spaced at any desired distance from each other. The lock otheredge having struck-up lugs adapted is especially advantageous for use in pipe, to enter the gutter with the edge, the gutter since the pipe can be shipped with the seams having an inturned flange at one Wall thereunlocked, thereby allowing-it to be nested of for engagement by the lugs to lock the 5 in compact form, and the side seams can be edges together, said lugs belng bent out- 15 instantly, snapped together. wardly a suflicient distance to spring beneath I claim: the-flange When they have passed the flange In sheet-metal Work, a self-locking seam, in moving into the gutter. one of the edges of the seam having a gutter I i 10 for receiving the other edge, and the said ARTHUR W. PRESCOTT.

Images