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Publication numberUS1848715 A
Publication typeGrant
Publication dateMar 8, 1932
Filing dateNov 27, 1928
Publication numberUS 1848715 A, US 1848715A, US-A-1848715, US1848715 A, US1848715A
InventorsMaxwell S. Hart
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Certificate of correction
US 1848715 A
Images(1)
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Description  (OCR text may contain errors)

March 8, 1932. M. s. HART ET AL METAL PANEL Filed Nov. 27.. 1928 Harwell Sfiart,

G. Hz'ldzzzg A 11 derson, Gerald A. McDonald, INVENTORS.

#& v

ATTORNEY Patented M ar. 8, 1932 UNITED STA ES PATENT OFFICE MAXWELL S. HART, GUSTAV HILDING ANDERSON, AND GERALD A. MACDONALD, OF NEW BRITAIN, CONNECTICUT, ASSIGNORS TO THE HART-Q; HUTCHINSON COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT mm ram Application filed November 27, 1928. Serial No. 822,214.

This invention relates to metal panel construction, and more particularly to a metal panel comprising a pair-of opposed telescoping parts adapted to be permanently locked together by the operation of forcing said parts together in a press without the use of bolts, rivets, or welding.

One object of this invention is to provide .a'panel of the above nature in which the opposite sides thereof are formed from separate sheets of metal provided with inwardly extending flanges on their edges, which flanges are adapted to interlock with each other when the sides of the panel are telescoped.

A further object is to provide a panel of the above nature which will be simple in construction, of excellent heat-resisting quali ties, which will not twist or warp when sub jected to a high temperature, which will be inexpensive to manufacture, easy to assemble,

ornamental in appearance, and very eflicient and durable in use.

7 With these and other objects in view there have 'been illustrated on the accompanying drawings two forms in which the invention mav be conveniently embodied in practice.

Fig. 1 represents a view in elevation of a fire door embodying the invention.

Fig. 2 is a transverse sectional view taken along the line 22 of Fig. 1, looking in the direction of the arrows.

Fig. 3 is a similar sectional view of a modified form of the invention.

Referring now to the drawings in which like reference numerals denote corresponding parts throughout the several views. the numeral 10 indicates a fire door embodying the inve ntion. said fire door comprising a panel formed from a pair of rectangular metal sheets 11 and 12 having flanges 13 and 14 upstanding from the edge thereof. The two flanges 13 and 14 are adapted to be brought into telescoping relation surrounding a filler or core 15. the latter being constructed of any suitable heat-insulating and sound-deadening material such as wood, paper, corrugated cardboard, cork, etc.

The filler or core 15 should preferably be made slightly thicker than the normal inside depth of the assembled panel. Thus,

upon assembly-in the press, the filler will be compressed slightly, and when the pressure is relieved, the natural resiliency of the filler will exert an expansive pressure or force upon the sheets 1 and 2, thus causing the interlocking sections of the flanges 13 and 14 to be more tightly locked together.

The flanges 13 and 14 are provided on their edges with means for producing an interlocking joint between the sides of the panel when the latter are forced together in the press. For this purpose, the flange 13 has an inclined section 16 extending inwardly and terminating in an outwardly-inclined section 17, whereby a V-sha ed groove is formed, as clearly shown in ig. 2. The inclined section 17 is connected at its outer edge with an inclined inwardly-extending cam section 18 adapted to cooperate with a similarly inclined wedge section .19'bent backwardly and inpardly from the flange 14 of the metal sheet In operation, when the two cooperating telescoping sides 11 and 12 of the. panel are forced together in a press, the wedge section 19 of the flange 14 will first engage the cam section 18 of the flange 13. This will cause the flange 13 to be bent inwardly and the flange 14 to yield outwardly until the wedge section 19 passes beyond the outer edge of the cam section 18, whereupon the wedge section 19 will snap suddenly automatically into the V-shaped groove formed by the inclined sections 16 and 17, securely and permanent- 1y locking the two sides 11 and 12 of the panel together. The angle of the inclined section 17 is so pitched that it will be practically impossible thereafter for the wedge member 19 to be forced out of position.

The dimensions of the parts will preferably be so designed that when the sides 11 and 12 are assembled, the wedge section 19 will lie in flat contact with the inclined section 16, and the flanges 1 3 and 14 will lie flush and in alinement with each other. The small groove at the joint between said flanges 13 and 14 will preferably though not necessarily be filled. with any suitable sealing malike as shown in Fig. 2.

While in the embodiment shown in Fig. 2 the lower edge of the cam section 18 does not touch the sheet 12, it is within the spirit and scope of the invention to so construct said cam section, in which case the cam section 18 would be pressed upwardly for holding the wedge section 19 more firmly in position, such construction not beingshown.

In the modified form of the invention shown in Fig. 3, the cooperating side members of the panel comprise metal sheets 19 and 20 having inwardly extending upstanding flanges 21 and 22, similar to the flanges 13 and 14 of the first form of the invention. Instead of employing a V-shaped groove, as in the flange 13, the flange 21 is bent inwardly at 23, downwardly at 24:, and outward at 25 to form a rectangular groove, no section similar to the cam section 18 being employed. The flange 22 is provided with a short inclined wedge section 26 having its extremity bent outwardly at 27 to lie parallel in flat contact with the section 25.

The present invention will be found es pecially adapted for use for the construction of fire doors, fire resistant walls and the like, but is not limited to these uses.

While there have been disclosed in this specification two forms in which the invention may be embodied, it is to be understood that these forms are shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosures but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

1. In apanel construction a pair of opposed side members arranged in different planes, each of said side members having a resilient flange upstanding along the edge thereof, said flanges being alined and shaped to telescope with each other and having interlocking means which automatically become effective when said side members are forced together in a press.

2. In a panel construction, a pair of opposed side members. each of said side members having a resilient flange upstanding along the edge thereof, said flanges being shaped to telescope with each other and having interlocking means which automatically become effective when said side members are forced together in a press, and a filler core normally thicker than the final inside dis tance between said side members so that said core Wlll exert resilient pressure to assist in maintaining said flanges permanently interlocked.

3. In a panel construction, a pair of opposed side members, each of said side members havin a flange upstanding along the edge thereof, said flanges being automatically shaped to telescope with each other and having interlocking means which become effective when said side members are forced together in a press, one of said flanges having a groove, and the other of said flanges having a wedge member adapted to fit into said groove when the side members are interlocked.

4. In a panel construction, a pair of opposed side members, each of said side members having a flange upstanding along the edge thereof, said flanges being automatically shaped to telescope with each other and having interlocking means which become effective when said side members are forced together in a press, one of said flanges having a V-shaped grove, and the other of said flanges having a wedge member adapted to fit into said groove when the side members are interlocked.

5. In a panel construction, a pair of opposed side members, each of said side members having a flange upstanding along the edge thereof, said flanges being automatical- 1y shaped to telescope with each other and having interlocking means which become effective when said side members are forced together in a press. one of said flanges having a groove, and the other of said flanges having an inclined wedge member adapted to fit into said groove when the side members are interlocked.

6. In a panel construction, a pair of opposed side members, each of said side members having a flange upstanding along the edge thereof, said flanges being shaped to telescope with each other and having interlocking means which become effective when .said side members are forced together in a press, one of said flanges having a groove, and the other of said flanges having an inwardly extending wedge member adapted to fit into said groove when the side members are interlocked, said flanges lying flush with each other when the side members have been assembled.

7. In a panel construction, a pair of opposed side members, each of said side members having a flange upstanding along the edge thereof. said flanges being shaped to telescope with each other and having interlocking means which become effective when said side members are forced together in a press, one of said flanges having a groove, and the other of said flanges having a wedge member adapted to fit into said groove when the side members are interlocked, said grooved flange having an inclined cam member connected therewith for engagement with said wedge member to cause said flanges to yield to permit assembly of said side members, said flanges lying flush with each other when the side members have been assembled.

8. In a panel construction, a air of opposed side members, each of sai side members having a flange upstanding along the edge thereof, said flanges being shaped to telescope with each other and having inter;- locking means which become effective when said side members are forced together in a press, one of said flanges having a groove, and the other of said flanges having a wedge member adapted to fit into said groove when the side members are interlocked, said grooved flan 6 having an inwardly extendmg cam mem er connected therewith for engagement with said wedge member to cause said flanges to yield to permit. assembly of said side members, said flanges lying flush with each other when the side members have been assembled.

9. In a vpanel construction, a pair of opposed side members, each of said side members having a flange upstanding along the edge thereof, said flanges being shaped to telescope with each other and having interlocking means which become effective when said side members are forced together in a press, one of said flanges having a groove, and the other of said flanges having a. wedge member adapted to fit into said groove when the side members are interlocked, said so grooved flange having a cam member connected therewith for en a ement with said wedge memberto cause said flanges to yield to permit assembly of said side members, said flanges lying flush with each other when the side members have been assembled.

10. In a panelconstruction, a pair of opposed side members, each of said side members having a flange upstanding along the edge thereof, said, flanges being shaped to telescope with each other and having interlocking means which become effective when said side members are forced together in a press, said flanges lying flush with each other and having the joint therebetweenfilled with a sealing material.

11. In a panel construction, a pair of 0pposed side members, each of said side members having a flange, upstanding along the edge thereof,'said flanges being shaped to telescope, with each other and having interlocking means which become effective when said side members are forced together in a press, said flanges lying flush with each other.

.In testimony whereof, we have aflixed our signatures to this specification.

MAXWELL S. HART. GUSTAV HILDIN G ANDERSON.

GERALD A. MACDONALD.

QER'MFICATE 0F QORRECTHQN.

Patent m. 1 mm Granted March s, 3932, w

mxmm so mm ET AL.

Hz is hereby mama mm error appears fin the printed specification 9% the above numbered patent rewiring cmrecton as iomaws: Page 2,, Mine 42, mfiazim A, after "constsrmtien" finsen a cama; same page, lines 67, 79 ami $0, 91 and 92, ciaims 3 and 5, respwtivefly, 5m "amtomatcaifiy" reafi aimed and; am? that me said Letters 3921mm shoufil be mad with these cortemiam 1121mm am the same may minim-m w the reward 0% im case in the Emem mike.

Signad and sealed. this 5m day 0% Aprii, A. D" 1932.

M. 3. Mame (Sea!) Acting Gmmissimm 9i fimmsn

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2579157 *Aug 2, 1948Dec 18, 1951Price Building Specialties CoPanel construction
US2664182 *Nov 30, 1951Dec 29, 1953Anderson Carl ASheet metal door construction
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US2762676 *Nov 28, 1950Sep 11, 1956Admiral CorpFreezer compartment door
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Classifications
U.S. Classification52/784.13, 52/455, 52/792.11, 29/453
International ClassificationE06B3/82, E06B3/70
Cooperative ClassificationE06B2003/7025, E06B3/827
European ClassificationE06B3/82F