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Publication numberUS77161 A
Publication typeGrant
Publication dateApr 28, 1868
Publication numberUS 77161 A, US 77161A, US-A-77161, US77161 A, US77161A
InventorsA. Milton Blake
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improved springs foe chairs
US 77161 A
Images(1)
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Description  (OCR text may contain errors)

@man faire item1 @frita Letters Patent No. 77,161, dated April 28, 1868.

IMPROVED SPRINGS FOR CHAIRS.

@Le segfault maar te ir tipa heeft prima mit making att nt tigt tame.

,.Q- g M '1f-04 ALL WI'IOM IT MAY CONCERN: Y

Be it known that I, A. MILTON BLAKE, of Canton, in the county of Stark, and State of Ohio, have-invented new and useful Improvements in Springs Applied to Chairs; and I do hereby declare that the following is a -full, clear, and exact description of my invention, reference being had to the accompanying drawings, and to the letters of reference marked thereon, of which drawings- Figure 1 is a front view of a chair with my improvement.

Figure 2 is a side view of the same.

Figures 3 and 4 are detail views of the manner of applying the springs to' the chair-legs.

Figure 5 is a sectional side view, showing a mode of constructing the plates.

The nature of my invention consists in the peculiar arrangement of a conical spiral spring under the fore logs or the hind legs of a chair, settee, or sofa, or any seat of like character, whereby I convert the common chair into a chair having all the advantages of a rocking-chair, and ,which rocks quite as easy, if not easier, than anyrocking-chair, the peculiar utility of the conical spiral spring, in this place, consisting' in the fact that, when said spring is compressed, the several coils lie sido by side, instead of lying one on the' top of the other, as in the case of a cylindrical spiral spring when compressed, which allows the chair to have a rocking motion equal to the whole height of the spring, instead of only having a motion equal to the sum of the distances between the diiierent coils, as is the oase when the cylindrical spiral spring is used, which is an important advantage, as it allows of obtaining all the requisite rocking motion without the necessity of having very high springs, which throw the chair so far back as to bein danger of upsetting when not occupied.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and application.

In the drawings, accompanying this specification, and forming a partl of the same, A represents the body of the chair, which is supported on legs, B B, C C, vas shown` The hind legs, B B, rest on the door, as shown, and the front legs, C C, rest on the springs F' F. v

The manner of attaching the springs F F to the legs C G may be either like that shown in iig. 3, where D represents a socket, in which the leg Gis enclosed at its lower end, a plate, E, 'being secured yto said socket on the bottom, as shown, and the spring F beingv attached to said plate in any suitable manner; or the arrangement may be like that shown in fig. 4, where D is a spindle, with a screw cut thereon, which is screwed into a hole in the leg C', the plate E being attached to the spindle D, and the spring F being attached to said plate E, as invg. 3. v

In both cases, a foot-plate, G, is attached to -thebottom of spring F, so as to prevent said spring from injuring the iloor or carpet.

The socket or spindle D may be cast with the plate E, or soldered to said plate, and the plates E and G may be cast on the spring F, or soldered to said'spring, or be made with flanges, as'shown in ig. 5, and the ends of said spring bent in circular form, and Asprung in under the anges, any of these methods being sufficiently strong to make a permanent job.

` Having thus fully described my invention, I do not claim the principle of putting springs under the legs of a chair, or bed, or anything of like character, either for the purpose of making a rocking-chair, or for any other purpose; nor do I claim any part of the chair A, B B, C C, nor the socket or spindle D, nor plates E or G, taken separately, as all these features have been before shown; but l What I do claim as my invention, and desire to secure by Letters Patent, is

The use of the conical spiral spring F, in combination with the foot-'plate G, plate E, socket or spindle D, and chair-leg C, in the manner and for the purpose herein specified.

As evidence that Irclaim the foregoing, I have hereunto set my hand, this 3d day of January, 1868.

i A. MILTON BLAKE.

Witnesses Y W. A. WIKIDAL,

E. N Bancone.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5490715 *Jan 20, 1992Feb 13, 1996Opsvik; PeterArrangement in a chair
US7850239 *Jul 10, 2008Dec 14, 2010Harry StillChair with spring actuated rear legs to minimize muscle strain
EP0568585A1 *Jan 20, 1992Nov 10, 1993Peter OpsvikArrangement in a chair.
Classifications
Cooperative ClassificationA47C7/002, A47B91/04, Y10S16/36
European ClassificationA47C7/00B