US593059A

US593059A - George d

Info

Publication number: US593059A
Authority: US
Publication date: 1897-11-02
Anticipated expiration: 1914-11-02

Description

(No Model.)

- G. D. SHERIFF'S & G. J. TRAVBRS.

REVOLVING CHAIR.

Patented Nov. 2

A J 0 0 4 1 4* a 6 View v1. 1

- and CHARLES J. TRAVERS, of Milwaukee, in

a sleeve 12, said sleeve provided with aseries UNITED STATES ATENT rerun.

GEORGE D. SI'IERIFFS AND CHARLESJ. TRAVERS, OF MILXVAUKEE, WISCONSIN.

REVO LVI NG CHA! R.

SPECIFICATION forming part of Letters Patent No. 593,059, dated November 2, 1897.

Application filed January 6, 1897.

an malaise. (N0 model.)

To all whom it may concern:

Be it known that we, GEORGE D. SHERIFF'S the county of Milwaukee and State of Uscousin, have invented a new and useful Improvement in Revolving Chairs, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

Our invention has relation to improvements in revolving chairs of that form wherein the spindle is adapted to revolve without raising or lowering, independent means being provided for securing the vertical adjustment of the spindle in order to raise or lower the chairseat.

The object is to simplify the present forms of construction, so as to secure the above ends with the necessity of employing the fewest possible number of parts, and to efiect the vertical adjustment of the spindle with the least possible trouble.

In the accompanying drawings, Figure 1 is a vertical sectional view of a chair-iron em bodying our invention. Fig. 2 is an inverted plan view of the chair-iron hub. Fig. 3 is a detail view of the slitted and interiorlythreaded tube. 'Fig. at is a view of the lower end of said tube. Fig. 5 is a detail view of the locking mechanism, and Fig. 6 is a vertical section of a modified form of construction more especially adapted forpiano-stools.-

It will be understood that the invention is applicable to all forms of revolving chairs and stools wherein a vertical adjustment is de-' sirable.

In the accompanying drawings the numeral 7 indicates the chair-iron hub, which is of the usual form exteriorly, being provided with the outer recesses Sfor the reception of the ends of the chair-legs. The bore of the hub is plain and is formed near its lower end with an annular shoulder 9. Upon this shoulder is seated a clutching member 10, which consists of a collar formed with an upper beveled or outwardly-inclined end 11. Also disposed within the bore of the hub is of slits 13, extending from its lower end upwardly for a desired distance. Any desired number of these slits may be provided, and j we haveshown four in the accompanying illustrations of the invention. The lower extremity of this sleeve is beveled or inclined inwardly, as indicated at 14, which beveled or inclined extremity registers with and engages the bevel or incline 11 of the clutchcollar 10. The sleeve is provided near its upper end with a series of recesses 15. This sleeve is held against being withdrawn upwardly out of the bore of the hub by means of a ring or annulus 16, which is held rigid within the bore of the hub and bears against the upper edge of the sleeve.

The numeral 17 indicates a serew-threaded spindle which carries at its upper end the spider 18, by means of which said spindle is connected to the chair-seat. This spindle enters the bore of the hub and passes through the ring or annulus 16, the sleeve 12, and the clutching-collar 10, the threads of said spindle engaging the interior screw-threads of the sleeve. 7

The numeral 19 indicates a flat plate-spring, which is secured at one end to theoutside of the hub by means of the screw 20. The upper end of this spring is bifurcated, the furcate parts thereof straddling a pin 21, which pin enters an opening 22 in the hub. In order to prevent the withdrawal of the pin from its opening 22, the sides oi said pin just back of its head are made flat, as indicated at 25 23. The circular portion of the pin in advance of these flat sides form shoulders, with which the en d of the spring contacts in case an attempt is made to pull the pin out, thereby effectiially preventing the withdrawal of the pin. As will be seen from Fig. 1, the upper end of the spring presses outwardly,so as to normally hold the inner end of the pin flush with the inner side of the bore of the hub. v

In the operation of the invention the parts are normally in the position shown in Fig. 1 of the drawings. When in this positionflf'the chair-seat is occupied, when said seat is rotated the spindle will be rotated therewith,as usual,and by reason of the fact that the sleeve 12 is slitted and provided with the lower beveled extremity, which is engaged by the beveled upper end of the clutching-collar, the sleeve is held tightly to the spindle, so that said spindle and sleeve are revolved together.

the spindle direct said spindle is necessarily raised or lowered in accordance with the direction in which it is turned by reason of the engagement of its male threads with the female threads of the sleeve.

In the form illustrated in Fig. 6, which is more especially intended for use in connection with piano-stools, the locking-pin 21 is dispensed with entirely and the lower slitted portion of the sleeve 12 is projected outwardly somewhat to form an annular shoulder or bearing-surface 24. When the seat is unoccupied, the parts assume the position shown in Fig. 6, which illustrates the annular shoulder 24 as bearing firmly against the bore of the hub. Suflicient friction is thereby engendered between the sleeve and the hub to hold said sleeve against rotation when the screwspindleis turned. It is therefore evident that the vertical height of said screw-spindle may be readily regulated. When, however, the seat is occupied, the weight of the person thereon will force: the spindle and the sleeve downwardly, so as. to wedge the registering bevels of the sleeve and the clutching-collar and permit the annular shoulder or bearingsurface 24 to just clear the surface of the hub. When the seat is then revolved, the spindle and sleevewill of course rotate together without afiectin g the vertical height of the spindle.

As stated at the outset, we do not wish to be understood as restricting our invention to any particular class of revolving chairs, but desire. to use the features of the invention in connection with any form of revolving chair or stool. The. particular formation of the hub herein shown and described, therefore, is not essential, and this may be varied to suit the particular class of chair or stool to which the invention is to be applie das,. for instance, in the case of an ordinary ottice stool, wherein the iron is provided with depending curved arms and a centrally-depending hub. When the invention is applied to an ordinary stool-iron of this kind, it is, obvious that all the essential features of the invention are retained, notwithstanding the slight difierence in the form of the hub.

IVhat we claim as our invention is- 1. In a revolving chair, the combination, of a hub, a screw-threaded spindle extending therein, an interiorly-threa'ded slitted sleeve through which the screw-spindle extends, a,

clutch-collar engaging the slitted sleeve and adapted normally to automatically hold said sleeve to rotation with the spindle, and means for holding the sleeve against rotation to permit independentrotation ofjthe spindle.

2. In a revolving chair, the combination, of

a hub, a screw-threaded spindle extending therein, an interiorly-threaded slitted sleeve within the hub, and through which the-screwspindle extends, a clutch-collar seated within the hub and adapted to engage the slitted sleeve, and to hold said sleeve to rotation with the spindle, and means for holding the sleeve against rotation to permit independent rotation of the sleeve.

3. In a revolving chair, the combination, of

a hub, a screw-threaded spindle extending therein, an interiorly-threaded slitted sleeve through which the screw-spindle extends,

said sleeve provided with a beveled portion, a clutch-collar also provided with a beveled portion registering with and engaging the bevel of the sleeve, and means for holding the sleeve against rotation to permit independent rotation of the spindle.

4. In a revolving chair, the combination, of a hub, an interiorly-threaded sleeve, a screwthreaded spindle engaging the threads of the sleeve, means for locking the sleeve to the spindle to provide for the rotation of the sleeve and the spindle together, a pin entering an opening in the hub and a spring having one end engaging the pin to normally hold said pinont of engagement with the sleeve, said pin when pressed. inwardly adapted to engage the sleeve to hold said sleeve against rotation with the spindle.

5. In a revolving chair, the combination, of a hub, an interiorly-threaded sleeve, a screwthreaded spindle engaging the threads of the sleeve, means for locking the sleeve to the spindle to provide for the rotation of the- 'mally held out by the spring.

6. In a revolving chair, the combination, of a hub, a screw-threaded spindle extending therein, an interiorly-threaded slitted sleeve through which the screw-spindle extends.

said sleeve provided with a beveled portion, a clutch-collar also provided with a beveled portion registering with and engaging the bevel of the sleeve, a pin entering an opening in the hub, and a spring having one end engaging the pin to normally hold the pin out, said pin when pressed inwardly against the action of the spring adapted to engage the sleeve to hold said sleeve againstrotation with the spindle, and to permit independent rotation of said spindle.

In testimony whereof we attix our signatures in presence of two.- witnesses.

GEORGE D. SHERIFFS. CHARLES J. TRAVERS.

Witnesses:

ARTHUR L. MORSELL, ANNA V. FAUST.