US1335884A - Chair adjustment - Google Patents

Description

0. ELTON.

CHAIR ADJUSTMENT.

APPLICATTON FILED JUNg 6. 1919. 1,335,884. Patented Apr. 6, 1920.

2 SHEETS-SHEET 1.

mi IT 'TMI Ill 2 I (l lll Illllliil l 0. ELTON. cHAm ADJUSTMENT. A Y APPLICATION Fl-LED JUNE 6| 9|9., 4 1,335,884. Patented Apr. 6,- 1920.

, 2 SHEETS-SHEET 2.

mlm mmm 26 .mm mmumnm m mm jme/325k l @Kyi/ Www 4as rara GIE-I AIIR,l ADJUSTMENT.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed June 6, 1919. Serial No. 302,183.

To all 'whom it may concern:

Be it known that I, OLAF ELTON, a citizen of the United States, residing at Port lVashington7 in the county otl Ozaukee and State of Wisconsin, have invented a new and useful Chair Adjustment, of which the following is a specification. l

My invention relates to improvements in revolving and tilting-chairs, especially to that portion thereof known as the adjustment, by means of which the chair-seat is supported upon the chair-base.

Heretofore in adjustments ot this kind, it has been the custom to provide for vertical adjustments ot the seat through theinstrumentality of' threaded adjusting-posts in conjunction with which operate threaded` hand-wheels or nuts mounted on the chairbase, or through some other instrumentalityT carried by the chair-base. The principal objections to such means lies in the tact that they are usually more or less coated with grease and accumulations or' dust and-in the further fact that they are for the most part inaccessible to the chair-occupant, requiring him to vassume a stooping posture, grope around for the hand-wheel or other operating element, and being out ot the chair at the time, he must guess as to the adjustment he is making.

The prime objects of my invention are to provide a simple means for adjusting the seat upon the supporting standard or post, to locate said means in the chair-iron, and. to so locate the elements employed in operating said means as to be operable by the chair-occupant from the chair, if desired, so th he is enabled to get such an adjustment as will exactly suit his requirements.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the claims.

Referring to the drawings- Figure l is a side elevation ot a chairadjustment typifying my invention;

Fig. 2 is a vertical transverse sectional view taken on the line 2--2 of Fig. l;

Fig. 3 is a horizontal vsectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a vertical sectional view on the line L -4 oi. Fig. 3 5 parts being broken away; Fig. 5 is a transverse sectional view on the line 5f- 5 of Fig. 2; and

Fig, 6 is a detail in elevation et the adjusting-post or standard. v

Similar numerals of i reference indicate similar parts in all the gures ot the drawings.

The construction of chair-iron which I have herein illustrated and will describe in detail is, for the most part, merely employed w for the purpose of typitying my invention, it being understood that the novel adjustingmeans herein disclosed may be employed in connection with any of the well-known types of chair-iron to which it is applicable.

Certain novely features of the chair-iron appearing herein but not claimed, torm the subject-matter of a companion application iiled by me.

In order to fully typify my invention, the chair-iron illustrated. comprises a U-shaped yoke, having opposite vertical side-walls il, and ya lower transverse connecting-wall 2. At their upper ends the side-walls are connected by a transverse brace-plate 3, the same being provided with downturned ends 4, embraced by the side-walls of the yoke and riveted thereto,A as at 5.

The chair-iron, in this instance, i'urther comprises a horizontal pivotal yoke consisting of oppositek side-walls 6,whi ch embrace the side-walls l of the stationary yoke, and connected at their rear ends by a transverse-walll'?. The side-walls ofthe pivotal yoke are pivotally connected tothe side- -ivalls of the stationary yoke by means of a transverse pintle 8, at a point above the lower transverse wall of latter yoke, the ends of the pintle being headed or upset, as is usual. f

The upper front portions ot the side-walls l of the stationary yoke are recessed thereby providing at the opposite or rear corners of said walls, vertical abutments or stopshoulders 9, and 'against such are designed to abut stop-pins 10, which` project inwardly from the side-walls 6 of the pivotal yoke. It will thus be seen that the rear transverse connecting wall 7 of the pivotal yoke abutting against the rear edges of the vertical side-walls l of the stationary yoke will serve to limit the forward'pivotal movement of the pivotal yoke while the pins 1 0 will perform a similar oliice for the pivotal yoke during its backward movements.

The tension-mechanism with the detail construction of which we are not interested in the present invention, is of the conventional type comprising the usual tensionrods 11, compression-springs 12, and adjust- Y ture 24 forined in the rods passing ing-nut or wheel 13, the

:formed 1n the through suitable openings 14:,

' rearlconnecting-wall 7 of the pivotal yoke,

The brace-plate 3 and the lower trans-I verse wall of the stationary yoke, are provided with circular openings 18a which, by reason of the relative positions of these two elements are spaced a considerable distance apart. These two openings are in vertical alinement and receive a vertical sleeve `19, the upper end of which is Vpre'i.erably swaged, 4as at 20, above the brave-plate il, and the lower end ot which sleeve extends through the lower opening to a point considerably below the stationary yoke. This sleeve, it will be observed being supported at two distant points` becomes rigidly' mounted in the stationary yoke of the chairiron, and is therefore prepared to successfully withstand the lateral stress to which it is subjected when in actual use.

The adjusting-post or standard is not threaded, as is usual, but upon one side near itsupper end, is longitudinally grooved, as at 21, and at 4its opposite side is provided with a longitudinal series of recesses or cavities 22. The adjusting-post or standard is of such diameter as will permit it to readily slide within the sleeve 19 and is secure-fl to said sleeve so that the two elements will revolve together, while yet maintaining a slidable connection, by means oi? a screw 253, threaded in the sleeve and having its inner end engaging with the groove 21 oit' the post or standard. The sleeve is :further provi..-..d at a point within the stationary yoke with a sn'iall aperture Q11-, which by vertically raising and lowering the chair-iron inay be caused to register or aline with any oi.: the recesses orcavities 22, heretofore inentioned as being provided in the adiusti standard or post. i l The adjusting-standard or post it will be understood, is swiveled in the usual manner 'in the chair-base, from which latter withdrawal of the standard or post inav he prevented by the usual means, as iforinstahce, by a key 25. The post or standard niavv he provided vwiththe usual bearing-collar rotating upon-the chair-base all or' which is common in structures olf' this kind, and hence, require no further detailing.

At a pointtransversely opposite the aperl sleeve, there is i'orniezl cit the stationary yoke, 27, (see Figs. and if.) aperture lastf mentioned there is in the side-Wall 1 a threaded aperture and vin said threaded an exteriorly threaded tubular or bored sleeve 28, that extends inwardly from the side-wall in which it is mounted to a point near and in line with the aperture 24 of the sleeve 19. A nut 29, threaded on the sleeve, is utilized to lock the same in position by being run tightly up against the side-wall in which the sleeve is located.

Mounted to reciprocate as well as rotate within the sleeve 28, is a horizontal bolt 30, longer than the sleeve and therefore projecting beyond the opposite ends o12 the latter. rllhe inner end of the boltis preferably somewhatrounded to conform to the outline of the recesses or cavities 22 of the adjusting-post or standard, and the diameter of the bolt is such as to enable it to readily pass in and out of the aperture 24 of the vertical bearing-sleeve 19.

N ear its outer end, the bolt 30 is provided with a guide-lug 31, the same being designed to operate against an inclined cani- 'face 32, with which the outer end of the horizontal `sleeve '228 is provided immediately outside of the yoke in which it is mounted. It will be obvious that as the bolt 30 is rotated partially, the guide-lug working against the cam-face 32,` will cause said bolt to withdraw from its end engagement with the recesses or cavities 22 of the adjusting-standard or post and thus release the chair-iron from its locked engagement with said post or standard, after which the chair-iron and the chair-seat may be raised and lowered upon the post or standard to the desired height.

Various means will readily suggest themselves ifor accomplishing the partial rotation of the bolt and its consequent withdrawal from its locking engagement with the post or standard, and -it will be understood that such means as are employed may he operable by the chair-occupant from any desired point; so that it is not to be understood that I limit my invention either to the` means herein shown and described for accomplishing the locking of the chair-iron upon the post or standard or to the means employed for operating the sanie, the arrangement shown being inerely a typication of .my invention.

ln the present instance, `l` secure to the outer end of the boltBO, beyond the end of the sleeve 28, a rocker-arm 38, the saine being` held rigidly upon the bolt by means of a set-screw 34, and to such arin is connected an operating-mechanism that may lead from any point desired and found conven` ient to the chair-user. A conveniently located operating system or means will be found in that shown, wherein, as willbc seen. l journal in the vertical. webs 35, ot the spider-arms 17, transverse shaft 36, the same being positioned immediately under the chair-seat 18 and in rear of the chair-iron. At one end this' shaft 36 is pro'- vided with a rocker-arm 37 j the same being secured to the shaft-'by a set-screw 38, and the arm at its lower extremity being pivotally connected, as' at39, to one end of a connecting-link 40, the opposite end ot which is pivotally connected, as at 4:1, to the free end of the rocker-arm 33 of the bolt 30. It will readily be seen that any rocking motion imparted to the shaft 36 will be conveyed to the bolt 30, and therefore, the latter reciprocated into and out of its loclt ing engagement with the adjustingpost or standard. It nowV merely remains to provide a convenient means for rocking the shaft 36, and in the present instance I acn complish this by providing the shaft at that end opposite the rocker-arm 37, with an operating-arm 42, which projecting from the shaft, may be` shaped as desired and caused to terminate at any point desiredand convenient. In this instance, the arm l2 projects to a point slightly below the bottom of the chair and near its edge, and is there provided with a plate or head 43, so that the user can readily reach the same with his hand while at the same time grasping the chair-seat withboth hands. By raisin .the head #i8 and relieving the chair ci; his weight somewhat, anvunlocking oi the parts will occur and the seat may be permitted to fall or lower or be elevated the desired degrec,l after whichY by merely releasing the plate 3, the locking engagement of the bolt and the adjusting-post or standard will become restablished. the weight oit the bolt operating-mechanism of the bolt being amply su'tlicient ttor returning the parts to their normal ,locking position.

I am aware that I am not the iirst to provide a Alocking-means for retaining vertically reciprocating adjusting standards for chairs at various elevations withV relation to the chair-base, and hence, I do not broadly claim the same as of my invention; but in all such constructions as have come within my knowledge, the locking-means employed have been otherwise mounted than upon and carried by what 'I term herein and in the claims as the chair-iron, such means usually being carried b v the chairbase or hub; so that, the term chair-iron. as I employ it herein, is intendedto mean what is sometimes called a spider and at other times a stretcher, such terms being used to designate a frame located at the upper end of the adjlisting-standard and upon which the spider-arms are tiltably mounted. By the word hub also, as used herein, l mean to include the usual commercial chairbase.. It will be ound that the chair-iron is far better adapted to receive a locking-device t'or the standard, as herein typiied, than is the chairbase, for Athat the latter, being always in view, is generally marred or its symmetry destroyed by the application of such a device.; and moreover is, in many instances, weakened by such application. By applying the locking-means, as I have, to the chair-iron, instead of to the chair-base, such locking-means is entirelyy out of sight, being located directly under the chair seat; and moreover, the

usual form or style of chair-iron provides ample room for the application of the vdevice; and finally, the locating of the lockingdevice within the chair-iron, enables me to employ an operating-means that may terminate adjacent the edge of the chair-seat and yet be hidden from view--a feature of the invention impossible where the lockingmeans is located in the chair-base.

`Having described my invention, what l claim, is:

1. In a chair-adjustment, the combination with an adjusting-standard adapted for mounting in a hub or base, of' a' chair-iron having a vertical sleeve vertically movable upon the upper portion of' the standard, a

locking-means carriedby thechair-iron to with an adjusting-standard adapted for mounting in a hub or base `and provided with a plurality of engaging cavities, of a chairiron having a perforated sleeve vertically movable upon the upper portion of the standard opposite the cavities, a laterally movable locking-means carried by the chairiron and adapted to lock the sleeve and standard together through the perforation of the sleeve and one ofthe cavities of the standard whereby to prevent independent vertical movement of the sleeve upon the standard, means fornormally retaining said iocking-means in engagement with one of said cavities, and means for releasing or withdrawing said locking-means from such engagement, whereby to permit of independent movement oi the sleeve upon the st and ard.

4. ln a chair-adjustment, the combination with an adjlisting-standard adapted to be mounted in a hub and having engaging recesses inits upper portion, otra chair-iron having a vertical sleeve mounted for vertical adjustment on the upper portion of said standard, a. locking-means carried by the chair-iron independent of the hub and adapted to engage' and interlock with the recesses of the standard, and means 'for operating said locking-means to disengage the same from said recesses.

5. In a chair-adjustment, the combination with an adjusting standard adapted for mounting in a hub or base, or" a chair-iron having a vertical sleeve vertically movable upon the upper portion of the standard, a locking-means carried b v the chair-iron and adapted to prevent independent vertical movement of the sleeve upon the standard, and means for operating to release said locking-means and extending to an operable position adjacent the edge of the chair-seat.

6. In a chair-adjustment, the combination with an adjusting-standard adapted to be mounted in a hub, of a chair-iron mounted for vertical adjustment on the upper portion of said standard, a locking means between the chair-iron and standard and independent of the hub, and means for disengaging said locking-means.

7. In a chair-adjustment, the combination with an adjusting-standard adapted to be mounted in a hub, of a chair-iron mounted for vertical adjustment on the upper portion of said standard, a locking-means between the chair-iron and standard and independent of the hub, and means extending from adjacent the edge of the chair-seat and adapted when operated to disconnect said locking-means.

8. In a chair-adjustment, the combination with an adjusting-standard adapted to be mounted in a hub and having a vertical series of recesses, of a chair-iron mounted for vertical adjustment on the upper end of said standard, a locking-means carried by the chair-iron independent of the hub and adapted to normally engage and interlock with one of said recesses, and means for operating said locking-means todisengage the same from said recesses.

9. In a chair-adjustment, the combination with an adjusting-standard having a series of engaging recesses, of a chair-iron, a reciprocal, rocking, locking-holt carried by chair-iron and adapted to normally engage one of the recesses of the standard, an inclined cam,alugextending from the bolt and working in contact with the cam, whereby to reciprocate said bolt when rocked, and means for rocking said bolt.

10. In a chain-adjustment, the combination with an adjusting-standard provided.

with a series of engaging recesses, of a chairiron comprising a yoke and a vertically disposed perforated sleeve mounted i'or vertical adjustment on said standard, a sleeve mounted horizontally in said yoke and provided with an inclined cam-surface, a bolt mounted to reciprocate as well as rock in said sleeve and to engage one of the engaging recesses of the standard through the perforation in the sleeve, a lug extending from the bolt and riding upon the cam-surface of the sleeve in which it is mounted, and means for rocking the bolt.

l1. In a chair-adjustment, the combination with an adjusting-standard provided with a series of engaging recesses, of a chair-iron comprising a yoke and a vertically disposed. perforated sleeve mounted for vertical adjustment on said standard, a sleeve horizontally disposed in said yoke and threaded in one of the walls thereof and provided at its outer endwith an inclined cam-surface, a bolt mounted to reciprocate as well as rock in said sleeve and at its inner end to engage one of the engaging recesses of the standard through the perforation in the sleeve, a lug extending from the bolt and riding upon the cam-surface of the sleeve in which it is mounted, means for rocking the bolt, and a jam-nut threaded on the horizontal sleeve and impinging against the wall of the yoke.

12. In a chair-adjustment, the combination with an adjusting-standard having engaging recesses, of a chair-iron having a sleeve disposed vertically therein and provided with an aperture registering with the recesses in the standard, a sleeve horizontally disposed in the chair-iron and provided with an inclined cam, a holt adapted at its inner end to engage one of the recesses of the standard through the aperture in the vertical sleeve and mounted to reciprocate and rotate in the horizontally disposed sleeve, a lug projecting from the bolt and operating against the inclined cam of the horizontal sleeve, whereby, when rocked, the bolt will be caused to withdraw from its locking engagement with the standard, a rock-arm at the outer end of the bolt, an adjacent rockshaft terminating at one end in an operating crank, bearings for the rock-shaft, a rockarm at the opposite end of the rock-shaft, and a link pivoted at one end to the free end of the rock-arm of the shaft and at its other end to the free end of the rock-arm of the bolt.

13. In a chair-adjustment, the combination with an adjusting-standard, of a chairiron comprising a yoke having opposite vertical side and an intermediate lower connecting-wall, and an upper transverse braceplate connecting the two side-walls and spaced from the intermediate lower connecting-wall, said plate and latter wall having vertically alining openings, a sleeve located in said openings and mounted for vertical adjustment on the standard, means carried by the yoke for engaging said standard and locking the yoke at a point thereon, and means for disengaging said locking-means.

14. In a chair-adjusment, the combination with an adjusting-standard, of a chairiron comprising a yoke having opposite veradjusting-standard, and means carried by tical side and an intermediate lower oonthe yoke for locking the latter upon the necting-wall, the latter having a central post at various points of adjustment onlthe 15 opening, a superimposed transverse braceadjusting-standard.

plate connecting the side-walls of said yoke ln testimony whereof 'I have signed my and having an opening alining vertically name to this specification in the presence of with that oit' the connecting-wall of the yoke, two subscribing witnesses.

said brace-plate being spaced from said ylaty ter wall, a sleeve located in the openings of OLAF ELTON the brace plate and yoke and extending at Witnesses:

its lower end below the yoke, said sleeve be- T. A. BOERNER,

ing mounted for vertical adjustment on the A, H. ERLWIG.

Images