US93186A - Improvement in bedstead-fastenings - Google Patents

Description

N. PETERS, PHOTO-LIYHUGHPHER. WASHINGTON D C time aan.

'WILLIAM H; nLLIol-or N cercati Letters Patent No. 93,186, dated August 3, 1869.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may conce-rn Be it known that I, WILLIAM H. ELLIOT, of the city, county, and State of New York, have invented a new and improved Bcdstead-14`astening; and I do hereby declare that the following` is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Similar letters of reference indicate the same devices in all the figures.

To enable others skilled in the arts to comprehend, make, and use my invention, I will proceed to describe its nature, construction, and operation..

rlhe nature of my invention consists in the employment of shoulders between the tenon and side-rail, which shall resist the tendency of the diagonal shoulders in the mortise to draw the tenon out ofthe rail when in use; in curving the diagonal shoulders of the post and tenon, so as to provide for the shrinkage of the parts; in the employment of square shoulders, with lateral space between the post and tenon; in so shaping and proportioning the mortise and tenon that the tenon shall enter the post by a horizontal` movement, and then commence a downward movement before it is all in the mortise; and in the en'lployment of a cleat, in combination with a wooden tenon, with shoulders, 'for holding it .on to the end ofthe rail.

Figure 1 is an elevation of a portion of a bed-post,

showing the mortise.

Figure 2 is a section of a post and side-rail, showing a double tenon in and' between the post and rail;

Figure 3 is a horizontal section of a post and rail, at dotted line n, tig. 2.

. Figure 4 is a section of a post and side-rail, show ing a doubletenon covered by a cleat.

Figure 5 is a horizontal section ofa' post and rail, at

dotted line 0,. lig. 4.

a, post of a bedstead.

b, side-railof the same.

c, that portion of a double tenon which enters the post.

c', that portion of a double tenon which is fastened in or to the side-rail.

(l, wide part of the mortis'e in the d', narrow part ofthe same.

e, diagonal shoulders of the mortise.

e', diagonal shoulders of the tenon.

f, shoulders formed by the end ofthe side-rail.

t, shoulders formed by depressions cut in the siderail.

i', shoulders formed on the side of that part of the tenon which is 'fastened to the rail.

71, Icleat over the tenon and across the end of the rail. This is nearly all broken away, in fig. 5, to show ythe tenon.

post.

My invention relates to improvements in woodenbedstead fastenings, of the kind now in general use, and upon which several patents have heretofore been issued to me; and i rlhe object of my invention is to provide for defects, which practical experience in the manufacture and use of my fastenings have shown to exist, and they are as follows; v

First. To fasten a tenon iu the end of a side-rail, and give it sufticien't strength, requires something more reliable than a glue-jointand pins, as the glue is sometimes of bad quality, and thc` pins are often carelessly put in. My improvement for increasing the strength of the joint between the side-rail andl tenon consists i n cutting shoulders t on the end of 'the rail, and shoulders fi on the tenon, which rest upon each bther, as seen in figs. 3 and 5. In addition to these shoulders, I use glue between the tenon and side-rail, which makes the fastening of the tenon to the rail perfectly reliable.

Second. It is not practicable for manufacturers to procure lumber for bedsteads so well seasoned as not to alter the shape of both mortise and tenon by shrinkage, after they have been. put into use. Shrinkage of the post decreases the angle of the diagonal shoulder c, and shrinkage of the side-rail and tenon increases the angle of diagonal shoulders e', so that .however well these angles may agree when the fastening is first made, one is sure to become larger and the other smaller in time, and the shoulders e and e', instead of touching each other their whole length, will onlytouch at the top, where the fastening is weakest; I provide for the change in angles by shrinkage by curving one or both of the shoulders, e and e', as 'shown in h'gs. 2 and 4. The shoulder e, in both figures, is curved, and the shoulder e' is curved in fig. 5. In this case the change of angles by shrinkage raises the point of cons* tact between the shoulders a little higher up, but not enough higherto weaken the fastening, as it does in case the shoulders are straight.

Third. In myformer patents, and in the bedsteads now in use, the diagonal shoulders have been made round, so that a strain put upon them, by weight upon the side-rail, tends to open the mortise and split the post. Experiments that have been made for testing the strength of the fastening, with round shoulders, have always split-the post; but, in every instance, eX- periments made for the same l purpose, with .square shoulders, have resulted in tearing out the front of the post without splitting it, and to do this requires a much greater force. In my improved fastening, I make the shoulders square, cuttingI them at right angles, or

'nearly'so, tothe direction of the strain, and also outting all parts of the tenon thinner than the mortise, so that the shoulders f and e are the only points upon the tenon where it touches the post. By making the shoulders e and e square, instead of round, they need not. be cut but little more than half as deep as round shoulders, and yet be fully as eiectual and cheaper,as a mortise for a tenon with square shoulders, of a given strength, may be narrower, and would be covered by a much thinner side-rail than would a mortise'for a tenon withround shoulders of the same strength.

Fourth. It has been found that the mortise and tenon shown in my former patents, and now'inpractical use, are not only too wide, but they are too long, and require a side-rail toowide, as well as' too thick to cover them, and, consequently, too expensive for cheap bedsteads. tise so that the tenou'will enter it by a horizontal.

I therefore construct my improvedy mormovement, and then take a downward movement before the vshoulders e' have passed into thenbrtise. By this construction of my mortise and tenou,'1am able to use thinner, narrower, and, consequently, cheaper side-rails, and yet retain a great width of tenon, which is necessary to prevent the siderail om twisting over, so as to let the slats fall out of their places. a

In putting'the bedstead together, the thick part of the tenon passes into the wide part of the mortise, by a horizontal movement, till the end of the tenon touches the bottom ofthe lnortise.- In this positionvery little more than the thick part of the tenon has ent-ered the mortise. f v

The operation is then completed by giving the tenon an inward and downward movement, the thick part of 4 it"passing down behind the shoulders e, in the sides of the mortise, till Ait is stopped by the end of the siderail coming in contact with the face of the post. By the horizontal movement the tenon enters, but it requires the downward and 4inward movement to bling J(he thin part of the tenon all within the mortise. A'lhe thick part of the tenon passes into the post, horizontally through the wide part of the mortise, while the thin part of the tenon passes into the post by a downward and inward movement through the thin part of the mortise.

This peculiar constructionyof my mortise and tenon enables Inc to use a much narrower and cheaper siderail than if they were constructed so as to allow the whole tenon to pass into the mort-isc, by a direct downward and inward movement. f

The construction and proportions of my improved mortise and tenon are such that no part of the tenon touches the mortise, except the shoulders e and f, there heilig an open space between the tenon and post at all other points; and the shoulders e and c being cut square, at right angles, or nearly so, to the sides of the tenon, any ordinary use of the bcdstead, such as sleeping upon it, or dragging it from one part of a rinm to another by a post, has no effect upon the mortise other than to compress the wood between the shoulders eand the face of the post, with no tendency whatever to split the post. y

- rlhe shrinkage which always occurs in bedsteads after manufacturing them, increases the angles of the tenon, and decreases the angles of the mortise, so that the shoulders of the tenon touch the shoulders of the mortise only at the extreme top, where they are weak est; but by curving one or both of the shoulders, eand c', and so shaping them that they will touch about in the middle shrinkage of the parts only brings the point of contacta little higher up, without changing it suficiently to weaken the fastening.

In my improved fastening, I employ the/ shoulders i and 'i' to resist the tension of the diagonal shoulders c and e'. In addition to this, I fasten the surfaces of the tenon to the siufaces'of the side-rail, by glue or other cement, which makes the fastening of the tenon to the side-rail all that can be desired.

By fastening the tenon to the-side-rail, as shown in figs Ltand 5, I am able to use a much thinner side-rail than by the modification shown in iigs..2 and 3. In

the former case the 'tenon let into the side of the rail, and afterwards covered by a cleat, and all the sur faces fastened together by glue or other cement.

lVhen a cleat is used, the shoulders t are only cnt on one side of the tenon, with a corresponding shoulder on the side-rail.

Then the tenon is put into the endof the rail, as shown in fig. 3, the rail must be thick enough to cover the mortise, butin the other modification of my invention the cleat comes up to the post, covers one side of the mortise, and forms shoulder f, on one side of the rail. In either modification, the tenon may be fastened to the side-rail, by the use of pins, screws, or nails, in addition to the glue, if desired, these' devices being equivalents.

Having described my invention,

What I desire to have secured to me by Letters Patent of the United States, is`

l. The combination ot` the post a, side-rail b, and double tenon c and c', with its shoulders i and t', when the surfaces of the tenon and side-rail are fastened together, substantially as described. i

2. Cui-ving the diagonal shoulders e and e of a selftightening wooden bedstead-iastening, substantially as shown, andfor the purpose specified.

3. So constructing a mortise, cut in the solid matcrial, of a bed-post, and a tenon attached to the end of a side-rail, that the tenon shall enter by a horizont-al movement, and then complete its passage into the.

i mortise by a direct downward and inward movement,

substantially as set forth. i

. WM. H. ELLIOT. lVitnesses:

F. C. SHEPARD, E. ROCHE.

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