USRE8389E - Improvement in dental - Google Patents

Description

J. o. WHITGOMB.

' Assignor t S. S. WHITE. Dental Operating Chair.

3 Sheena-sneer 1.

Reissued Aug. 27, 1878.

3 Sheets-.Sheen 2. J. 0. WHITCOMB.

Reissued Aug. 27,1878.

Assignor to S S. WHITE Dental Operating Chair.

IIIIIIIIIIV li` 3 Sheets-Sheet 3.

J. 0. WHITCOMB.

.8 7 8 .,l 2 .u a hA .Cd m e Hgu WDM ..1 St. we. MD.. .m50 $1 Aa vlu n e D. 9. 8 3 8 a N\ 'To all whom it may concern:

UNITE-D STATEs PATENT Quinton.'Y

SAMUEL s. WHITE, OFVPHILADELPHIA, PENNSYLVANIA, AssiGNEE 0F JAMES o. wHITcoMB.

l IMPROVEMENT IN DENTAL; OPERATING-CHAIRS.

Specification forming part of Letters Patent No. 50,291, dated October 3,1865 Reissue No. 8,389, dated d August 27% 1878; application filed March 28, 1878.

Beit known that JAMES O. Wnr'TcoiuB, of the c1t-y,county, and State ot" New York, did

invent certain new and useful Improvements in Dental Operating-Chairs, of which the following is a specication: y

The first branch of the invention relates more especially to dentists chairs of that class hav- 1n g a fixed or nou-rotating base with la chairbody capable of 'adjustment vertically, horizontally, and as to inclination relatively to the The object of this part of the invention is,

Iwhile giving the chair-body a wide range 0f adjustment, to support-it iirmly upon the base, which ends are attained by mounting thechairbody upon a rocking vsupport; controlled in its.

vertical movements by a series of screws mounted in the base'and simultaneously actuated to other may be varied to accommodate Persons The objectof the first' part of this branch of d the invention, is to insure the vease and comort of thejpatients, which end is attained by the combination ofgthe seat and back, the veri I tical relation of whichI to each other may be Vvaried with mechanismby which the seat may 'be rocked or oscillated relatively to the back to conform to the position of the occupant.

This part of the invention also consists in the combination of the seat and back with mechanism by which the seat may be rocked or oscillated relatively to the'back and locked at any desired angle.

` The object of the next part of this branch of .the invention is to render a dental chair- `seat adjustable independently relatively to the base and to the chair-body, both vertically and as to inclination, which ends areattained by pivoting the seat on a support movable ver-- tically relatively to the base' and chair-body.

The object o'f themext part of this branch 0f the invention is to enablethe operator to adjust the chair-body and rocking seat vertically relatively to the base by distinct mechanisms, and to render them adjustable as to invv.elination by common elevating mechanism independently of the seat-rockin g devices, which ends are attained by mounting the chair-body on a rocking and turning tubular support,

which also carries the rocking seat and its ele-- vating mechanism.

The object of the next part of this branch of the invention is to enable the operator to tilt the chair-body and seat relatively to the base and to eachother, and to turn the chair and seat and their supportv (Without raising them) and to lock them in such adjusted position,

which ends are attained -by combining a chairv head-rest, and seat to each other may be varied to accommodate the dii'erence in size of Vthe various persons occupying the chair, and

in which the seat and back are also capable of a variable, inclination or angular change ot' position relatively to each other to insure the ease and comfort of the occupant.

This part of theinvention further consists in the combination, in a dental chair, of a back and seat, the relation o fwhich to-each other vertically, aswell asv to inclination or angle, may be variediwith a head-rest carried by the back'adjustable vertically, horizontally, (or backwardA and forward,) and laterally lrelatively to the back, whereby every necessary adjustment is provided for insuring the ease and comfort of the patient and for the convenience of the operator. i

The 'object ofthe next part ot' the invention is toV provide a dental chair with a back and seat capable of a variable inclination or angular adj ustmcnt relatively to each other, and with a headrest carried by the back capable of varying adjustments'independently of the adjustment of the back, which ends are attained by combininga backJ and seat capable of varying inclination relatively to each other tively to each other with a head-rest adjustable laterally independently of the back.

This part of the invention also consists in the combination of a back and seat capable of \varying inclination relatively to each other with 'a head-rest adjustable horizontally (or backward and` forward) relatively to the back.

This part of the invention also consists in the combination of the back and seat capable of a varyin g inclination relatively to each other with a head-rest adjust-able vertically and laterally in reference to the back.

This part of the invention further consists in the combination of the back and seatcapable. of lvarying inclination relatively to each other with a head-rest adjustable vertically and horizontally (or backward and forward) relatively to the back.

The next branch of the invention relates to the head-rest of a dental chair 5, and its general object is to give it the widest practicable range of adjustment to accommodate the varyin g circumstances under which it is required to operate.

The special, object of the first part of this' branch of the invention is to enable the operator to reverse and raise or lower the headrest or change its position without necessitating the turning of the support upon which it is mounted, and simply by swinging or turning it varound or upon its vertical support, which ends are attained by combining a vertically-adjustable support or bar, upon which a clamp acts to position, a support carrying a head-rest pad, mounted upon the vertically-adjustable support, and capable of being turned around upon it to present the pad in a new relation to the chair-back without turning, moving, or disturbing the position of the vertical support, and a clamping device to lock the reversible head-rest in position. f

The special object of the next part ot'- this branch of the invention is to render the headrest adjustable backward and forward or horizontally relatively to the chair-back, and reversible or'capable of being turned so as to present the pad in a new relation to the chairback, which ends are attained by mounting the head-rest,l upon a turning-support acted and` adjustable `backward a ld forward relatively to the back ot' the chair.

In the accompanying drawings, Figure 1' represents a front elevation of the improved chair, partly inl section, on the line 1 1 ot" Fig. 3. Fig. 2 represents a rear elevation thereof; Fig. 3, a vertical longitudinal sectionfthrough the chair-body and base on the line 3 3'of Fi gs.

secure it lirmly in its adjusted 1 and 2. Fig. ltrepresents a sectional perspective view on an enlarged scale through the chair-seat, showing porting and tilting it. Fig. 5 represents a horizontal section-on the lii1e5,5 of Figs. l, 2, and l3. Fig. (-r'epresents a side viewot the head-rest, partly in vertical lpngitudinal central section, to show the details of its adjustment more clearly. Fig. 7 represents a vertilcal transverse .section through the head-rest` support on the line 7 7 of Figs. 3 and 6. Fig. 8 represents a transverse section through the head-rest support on the line 8 8 ofl Fig. 3.

To a suitable base or stand, A, is fixed a ring, A', the space between them being sullicient to admit aseries of nut-wheels, b, which work freely on a corresponding series of screws, C, the ring A' thus forming bearings for the under side of the nut-wheels. In the center of the ring A' is a bearing for a center wheel, B, to which wheel, motion is imparted through the intervention of a hand-crank, B', and bevelwheels b b2, by whichv means all the nut-wheels b are caused to rotate at the same time and in the same direction.

The upper ends of the screws C are iixed to projections on the rings C' at points coincident with-holes Ainthe base through which said screws pass. Within this ring C' a chainber or bearing is made, into which leather or other adhesive and frictional material c is placed in such manner that a perforated ball or circular tubular chair-support, D, mounted in said chamber, fits closely at all points.

A clamping ringer band, D', isiitted on the upper part of this ball D. A screw-rod, d, projects downwardly from this band through a projection oli the supporting-ring C', and is provided with a set-nut, by whichr means the band may be clamped upon the ball. y

A downwardly-projecting rod, d', on the opposite side of the clamping-band, is provided at its lower end with eyes or loops, in which an eccentric or cam, c, is pivoted, which cam vis Worked lby a foot-lever, E, connected therewith. The ball D is shown as provided with a central tube or pipe, g, of suitable size to receive an elevating-screw or seat-support, G, upon which the chair-seat is mounted, as hereinafter more particularly described. The bodyFof the chair is attached by framework f to a iian ge formed upon the top ofthe ball. The elevating-screwror seat-support G, above mentioned, passes through a bevel-nut wheel, H', revolving-upon the top of the ballv D, and has a cross-bar, I, mounted upon its upper end. The ends t' of this cross-bar are bent upward and slightly forward, extendingl midway into the seat J of the chair, and are pin -jointed thereto at j.

A rod, lr, passes through the ears or turnedup ends z', near the cross-bar I, and has a cam, K, fixed upon either Aof its projecting ends, the said cams operating upon stud-pins k' fixed pn the seat. (See Fig. 4.) The nut-wheel E the devices for supmore or less tightly tends through the bracket L1 into a longitudi- J n al groove in the slide-bar L.

(See Fig. 8.) To the upper end of the slide-bar L is securely fixed an overhan ging bracket-piece, M,A through an opening in which a round sliderod, N, moves freely endwise. A clamp-screw, Ml, locks 'this rod in any position desired. Av guide-screw, M2, the point of which reaches .through the bracket M into a longitudinal groove, rn., vin the tubular-sliderod above mentioned, (see Figs. 3, 6, 7, and 8,) prevents ,thisl slide-rod from turning in its bearings until released from the guide-screw, while leaving it free to move endwise therein.`

A head-rest is mounted upon a cushion- `plate, lt, Aprovided with a dovetail slot o r groove, i", Figs. 2, 3, and 6, in which slot a dovetail-lieaded bolt, p, carrying on its threaded end a clamping-nut and handle, fits. This clamp-screw passes througli'a plate, O, rocklin g upon pivots o on asupport, o', fixed upon the end of the slide-rod N, the inclination of this plate being regulated by means of a sector-rack, a, meshing with a screw, N', passing throughthe tubular slide-rod N, and being provided with amilled head, n2, by which it may readily be turned.

Projections on the inside of the plate O lit into the dovetailed slot r in the cushion-plate on each side of the-headed bolt p, and thus lprevent the cushion-plate from turning on the plate O, while permitting it to be adjusted laterally thereon.A

` The head-rest is connected with its turning- .s'upports at apoint on one side of a horizontal line drawn transversely through its center in this instance, which arrangement permits-of a reversal of the head-rest, to elevate or depressit, as hereinafter explained.

The invention being thus described, its 0peration will -now be explained.

Fiist, thr0ugl`ithe intervention of the crank B', i sbevel-wheels b b2, and the centerwheel B, t e nut-wlieels b are revolved, thus easily raising or lowering the whole body of the chairto any desired height. Y

Secondly, raising the foot-lever E' loosens the clamping-band D upon the ball D, and en; ables the operator to place the body of t-he chair at any required'angle -of inclinatioinor to turn it horizontally by moving theA ball in its bearings in the ring C', and lowering the tion.

Thirdly, the chair-seat J may/be raised to any required height by turning the crank H,l which, through its pinion, revolves the bevelfoot-lever clamps it securely in any such posisupport instance, raising the lever tilts the front of the nut wheelV H', through which the screw Gr1 passes. y

Foiirthly, the seat may be rocked upon its by means of the cam-levers K-foi' seat up, and consequently lowers its back and retains it at such angle as is needed more effectually to prevent the patient from slipping and sliding forward during painful dental operations.

It will thus be seen that while the chairy base and elevating mechanism remain fixed,

.i the chair-bodyr and seat may, through the niedium of the ball interposed between said base and the chair-body, be eadily turned horizontally5 and tilted relatively to the base and locked in anyy desired position, and that the chair-seatmay readily be raised, lwered, or oscillatedupon its supports independently of the chair-body, by whichthe size of the patient maybe 'accommodatedand, ease and comfort secured. l 0f the head-rest it may beugemarked- First,l that it may be raised or lowered to any desired height by moving its support endwise through its bearings, and fixed by means of the clamp-screwL", and, by disengagin g its guide-screw L3 from its groove, the operator is enabled to rock in its bearings to arrange the 'cushion-plate or head-rest in different planes relatively to the back of the chair, and to secure it iny such adjusted position by means of the clamp-screw L, as before.

Secondly, the head-rest or cushion-'plate may be adjusted backward or forward by means ot the slide-rodN, and xed where required by its clamping-screw Ml. It may also be turned to either side of the chair by disengaging its guide-screw M2 from its groove and rocking the slide-rod in its bearings, and may be as securely clamped in such adjusted position by its clamping-screw, as before; ,l

Thirdly, the head-rest or cushion-plate may readily be adjusted andheld at 'any desired inclination relatively to the back of the chair by means of the slide-rod N, its milled head and screw-N', and the sector-rack nl on the rocking' plate 0. i

Fourthly, the head-rest or cushion -plate may move horizontally and laterally to either side of the chair, and maybe firmly secured to its silPIOrting-plate O by means of its dovetailheaded bolt and clamp-nut. l

1t will thus be seen by these improvements that the head-rest is rendered. adjustable ver.- tically, as well as capable o f turning axially Vupon its vertical support; that it is adjustable backward or forward, horizontally as well asaxially, relatively to said horizontalnsupport; that its angle of inclination may be varied,

and that it may be adj usted laterally, whereby a wide range of adjustment is imparted to the head-rest to adapt it to the varying circumstances orconditions under which it is required to operate.

the slide-bar horizontally vertical relation inbefore setforth, of the base, a series of elel'vatln g screws mounted therein, a series of nut-wheels controlling the movements of the elevating-screws, and thechair-body, rocking upon its support, carried by the screws.

2. The combination, substantially as hereinbefore set forth, of the seat and back, the of which to each other may be varied, with mechanism by which the sea-t may be rocked or oscillated relatively to the back, to coliform to the position of the o'ccupant'. 3. The combination,

chair-body, with the seat pivoted thereon,

base land chairbody, both vertically and as to inclination.

5. The combination, substantially as hereinbefore set forth, of the chair-body mounted on a tubular support capable of rocking and turning relatively to its base, and the verticallyadjustable rocking seat'also mounted on said support.

6. The combination, substantially as hereinbefore set forth, of the seat rocking on its pivots relatively to the chair-back, locking devices for securing the chair body at varying angles, as required, and the tubular support upon which the chair is mounted, turning relatively to the base without raising,` or lowering the chair.

7. The combination, substantially as hereinbcfore set forth, of the back, .the head-rest, and the seat, the relation of which to 'each other vertically may be varied to accommodate the dilcrences insize of various persons relation of which to each other vertically as well as to inclination or angle may be varied, with' a head-rest carried ble vertically, horizontally, (or backward and forward,) and laterally relatively to the back, whereby vall necessary adjustments are provided yfor insuringl the ease and comfort of the f patient and' for the convenience of the 4op-L erator. l u

9. The combination, substantially as hercinbei'ore set forth, of theback and-seat, capa- .'ble ci varying inclination relatively toeach other,'with a head-rest adjustable vertically, laterally, and horizontally backward and forward relatively to the back, whereby the ease and comfort of the patient are insured.

10. The combination, substantially as hereinbefore set forth, of the back and seat, capable of varying inclination relatively to each other, with the head-rest adjustable laterally independently of the back. v

1l. The combination, substantially as hereinbefore set forth, ofthe back and seat, capable of varying inclination relatively to each other, with the head-rest adjustable horizontallyor backward and forward.

12. The combination, substantially as hereinbefore set forth, of the back and seat, capable of varying inclination relatively to each other, with the head-rest adjustable vertically and laterally in reference to the back;

13. Thecombination, substantially as hereinbefore set forth, of the back and seat, capable of varying inclination relatively to each other, with the head-rest adjustable .vertically and horizontally, or backward and' forward,

relatively to the back.

14. The combination of the justable supporting-bar, its clamp, the headrest pad-support N, mounted and turning -upon the supporting-bar, and the clamp acting upon the turning support, these members being constructed to operate in combination, substantially as liereinbefore Set forth, whereby thc head-rest support is capable of being turned around upon the vertical supporting-bar to reverse the pad without turning or disturbing the position of the vertical support. j

15. The head-.rest mounted upon a turning support, acted upon by a clamp, and adjustable backward and forward relatively to the back of the chair, substantially as described, whereby the head-rest is rendered adjustable backward and forward, a-nd is also capable of being turned so as to present the pad in a new rela-tion to the chair-back.

' SAMUEL STOCKTON WHITE.

Witnesses: v

J. A. B. WILLIAMS, FRANK L.- Hisn.

by the back, adjustav vertically -ad-

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