US2345025A - Securing means for adhesively held parts - Google Patents

Description

March 28; 1944. BEITER 234E025 SECURING MEANS FOR ADHESIVEi-IY HELD PARTS Filed July 3, 1943 2 SheetS- -Sheet 1 I H 1 Z? Z) 5 7 7:9 i7

'IIIIIIIIIIIIII A Y INVFNTOR. wye fiezzer I BY G. BEITER March 28, 1944.

SECURING MEANS FOR ADHESIVELY HELD PARTS Filed July 3, 1943 2 Sheets-Sheet 2 v/ r w R. P Wu w M/ 7 W 4 Cw m w@ .6 Q

Patented Mar. 28, 1944 SECURING MEANS FOR ADHESIVELY HELD PARTS George Beiter, Long Island City, N. Y., assignor to Steinway & Sons, New York, N; Y., a corpora-'- tion of New York Application July 3,1943, Serial No. 493,443

Claims.

This invention relates to securing means for adhesively held parts, and has for its object to provide improvements therein, so that such a device may be used again and again, and at,

the same time permit it to be readily removed.

In the construction of gliders, or aeroplanes in which veneer or plywood is used as a shell or skin over the framework, such sheets of plywood are joined to the frame by a suitable adhesive and pressed'together until the joint is dry. Such pressing together of the wooden members was carried out by a plurality of nails arrangedsuccessively alonga strip of wood or canvas, the

heads of the driven nails pressing'again the wood or canvas, which distributes' a partof the pressure to the skin and-presses it against the framework, the driven nails also pressing the skin against the framework and the adhesive therebetween. The removal of such a strip with nails was difiicult, in that the canvas strip would tear from the nails, or in the case of wood strip, it would break or split requiring separate operations to remove the nails.

The invention consists in providing a plurality of adjacent cleats upon a strip of canvas, each cleat having a bore for the passage of the'nail shank,-with the diameter of the bore considerably smaller than the-diameter of the head of the nail, and witheach'cleat having an inclined surface at its rear end to form an angular spatial relationship with the surface of the next ad-jacent cleat. cleatsenables the forward-cleat to act as a lever to pull out the nail, thus requiring comparatively little direct force in the strip or band, the setting in operation of the-next following cleat-assisting the continuing operation of the forward cleat until its nail has been extracted, the described- This spatial separator of adjacentoperation repeating itself for the length of the strip. The nails being slightly bent after extraction maybe readily straightened and returned into initial position on the'cleats, in accordance with a-fe ature of this invention, andthe strip can be again used. The strip with little efiort by the operative is readily removed from its position on the skin or shell.

The invention will be further described, embodiments shown in the drawings, and finally pointed out in the claims.

In the accompanying drawings,

Fig. 1 is a perspective view of my improved securing means for adhesively held parts;

Fig. 2 is a perspective view of a part of a glider, showing its framework and skin sheets, with an embodiment of my device applied thereto;

, Fig.3 is a vertical longitudinalsection taken on line 3'-3 of Fig. 2;

Fig. 4 is a vertical transverse section takenpn line 4-4 of Fig. 3;

Fig. 5 is a detail fragmentary longitudinal section;

Fig, 6 is a transverse section; Fig. '7 is a diagrammatic operation of the device;

I Fig. 8 is a perspective view of placer; and

Fig. 9 is a transverse section of thesame, for replacing the nails into .initial position .Similar characters of reference indicate corresponding parts,

the nail re- Referring to the drawings, and mor particularly to Fig. 1, a strip or band ll! of canvas having a hand hold Ii, has applied to it lay-glue,

nails, rivets or screws, a plurality or -seriesof- Wooden cleats I2 preferably made of birch plywood to give sufficient hardness to nail resistance. Each cleat has a bore I3, which registers with a bore l4 in the canvas, and a'nail passes throu h these bores I3 and I4, from the cleat, the head I5 of the nail abutting against the outer upper surface of the cleat. The cleats arepreferably cubical with square or rectangular surfaces. The cleats are placed closely adjacent toeach other successively along the bandonstrip ifl. The; nails project about two-thirds of their length fromthe outer strip surface I6. Thenailslare preferably rounded wire nails. Each cleat is provided with an inclined surface I"! of about 18 to the perpendicular, and this surface isat the real" of the cleat and faces the next adjacent surface of the forward end I8 of the next cleat. When the front hand hold II is pulled, the first cleat I2 is raised at its forward end and rides upon the apex end 23 at its rear end 2 I, and thus:acts-as.a lever to pull the nail partially out of :its'naileddown position. The inclined wall I! permits. this lever action without being impeded by .thenext cleat. The pulling upon the hand holdicauses the nextv cleat to be raised at its forward end and this next cleat to act as a lever, its rearward inclined, surface permitting this action without being blocked by the third cleat. The second cleat pulls out its nail partially, the first cleat completing or almost completing the extraction of its nail. The action described repeats itself for each successive cleat of the series, until all of the nails are extracted which can be done with comparatively little effort due to the translation of the pulling force on the hand hold to the successive lever actions.

view showing; theposition is placed upon the shoulders 32 with the upper surface of the cleats abutting against the shoulders 32, and the protruding length of the nails projecting upwardly from the canvas strip. A presser (not shown) presses upon the points of the nails, and forces them downwardly until the points are flush with the outer surface of the canvas strip, and with the head ends of the nails now projecting downwardly into the groove 3| of the The securing means described is now I block 30. ready for another application to the structure to be adhesively joined by pressure exerted by the nails pressing the adhesive between the contiguous surfaces.

The angle 18 has given very satisfactory results,'but the final form had an angle of 30 which also operated smoothly.

I have described several forms of my invention, but obviously various changes may be made in the details disclosed without departing from the spirit of the invention as set out in the following claims.

Instead'of a hand hold as shown, the end of the flexible member may be knotted, which knot or other enlargement serves a hand hold. Preferably two nails or tacks afilx the canvas ribbon to the bottom of the cleats, these being applied near themargin of the ribbon and about centrally of the cleats. In addition to the holding action resulting from these nails or tacks, the ribbon i glued tothe bottom of the cleats.

--In the structure which has given satisfaction in use, the length of the flexible member or canvas ribbon is about 24 inches; the length of the blocks or cleats from end to end of the series is about 18% the width of each cleat is about A in.; the length of each cleat at the base is A; in., the height is about in.; the space between the bottoms of each cleat is about T in. or less; the length of the nails is A in., and the width of the ribbon is in. The thickness of the ribbon is less than g in.

Before the device is used, the canvas is not pierced; the points of the nails rest against and do not pass through the canvas.

These dimensions aregiven to enable anyone skilled inthe art to duplicate such a device, but it is not desired that any limitation should follow from such a delineation.

What I claim is:

l. A device for holding adhesively joined members, comprising a flexible supporting member, a plurality of blocks secured to one side surface thereof, each block having its side spaced from the adjacent side of the adjacent block, and nails,

one for each block passing through the blocks and supporting member, said nails being adapted to hold adhesively joined members together, and adapted to be withdrawn from said members by the angular movement of one block in respect to its adjacent block, and each block having a flat surface to distribute the nail head pressure when the same isapplied to the block to transfer it to the joined members when the block is applied thereto.

2. A device for holding adhesively joined members, comprising a flexible supporting member, a plurality of blocks secured to one surface thereof,

each block having its side spaced from the adjacent side of the adjacent block, and nails, one for each block passing through the blocks and supporting member, said nails being adapted to hold adhesively joined members together, and adapted to be withdrawn from said members by the angular movement of one block in respect to its adjacent block, each of said blocks being substantially cubical and having its spaced side at an inclination to the plane of the member, and each block having a flat surface to distribute the nail head pressure when the same is applied to the block to transfer it to the joined members when the block is applied thereto.

3. A device for holding adhesively joined members, comprising a flexible supporting member, a

plurality of blocks secured to one surface thereof, each block having its side spaced from the adjacent side of the adjacent block, and nails, one for each blockpassing through the blocks and supporting member, said nails being adapted to hold adhesively joined members together, and adapted to be withdrawn from said members by the angular movement of one block in respect to its adjacent block, each of said blocks being substantially cubical and having its spaced side at an inclination to the plane of the member, said member being of canvas and having a hand hold, and said blocks being of wood, and each block having a flat surface to distribute the nail head pressure when the same is applied to the block to transfer it to the joined members when the block is applied thereto.

4. In combination, adjacent cubical blocks, each having a nail hole and a nail therein and each having a flat surface to distribute the nail head pressure when the same is applied to the block, and means flexibly joining said blocks, said blocks being spaced from each other at their adjacent sides, the movement of one block in respect to.

the other, forming a lever action, extracting said nail or nails.

5. In combination, a series of adjacent cubical blocks, each having one surface in angular relation of about 18 to the adjacent spaced surface of the next block and each having a flat surface to distribute the nail head pressure when the same is applied to the block, and a flexible supporting member at one side of said blocks at substantially right angles to the said spaced surface.

GEORGE BEITER.

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