US1542508A - Chair - Google Patents

Description

' F. KOENIGKRAMER June 16, `19254.

CHAIR Filed Az. 2. 1922 2 Sheets-Sheet l attenua* June 16,5 1925. 1,542,508 F. KOENIGKRAMER f CHAIR Filed Aug. 2. 1922 lSheets-Sheet 2 iatented June 16, 1925. f il f;

unirsi) STATES t 1,542,508 vPafrlL-rv'r OFFICE.'

'FREDERICK lKOENIGr'KRAB/LER, OF CINCINNATI, OHIO.`

' CHAIR.

.` Application filed August V2,1922.v Serial No. 579,195.

of chiropodists, and ffor similar purposes,

as for instance, for Optometrists, and for minor `surgical operations. `Another object is to provide improvedchair seat and "back adjusting apparatusl Another objectfis vto `provide improvedymeans toy cushion and lock the 4adjustments ofthe chair seat relative to the'fbase Another'object isto providean' improved foot rest `for chiropodists and surgical purposes. Another object is to provide improved'means tov support and adjust a head-rest'fup'on and relative tothe chair. Another object is to provide improved foot rest adjusting apparatus. My invention also comprises certain .details of form and relation `of component members, all 'olf which will 'befu'lly set forth in the description of theaccom'panying drawings, in which:

Fig. 1, `is a side elevation of a chair embodying mycimprovements.

Fig. 2, is afront elevation of lthe same with the foot restdetach'ed;

lilig. "3, is aA front 'elevation of the foot rest detached. p n j Fig. 4, .is a side elevation of the vfoot rest detached, showin onemet-hodof its appli.- cation, an'dparty,A indicating itsJra-nge of adjustifient.'` j Y j j j Fig 5, visa ,plany of'the chair seat with the seat, cushion detached.

Fig; 6,' Ais :ia sectional 'detail taken on line 6-6 of Fig. 5.

.Fig.f7, is 'afdetail ofthe head-rest ad` justing land clampingv means.

The laccompanying drawings illustrate the preferred'emhodinfientsr r'of my invention in which 15 represents a chair base, preferably provided zwith' `a vertical cylinder lltorece'ive a hydraulic plunger or 'stanilftrdV 17 uponwhichthe chair seat, back., arms and foot rest yare all mounted, and which/enables said parts -Ito all be "adj usted together to different rpositions vertically through'lthey movements o-fsaid plunger very'tically in said cylinder. Said plunger with the chair members carried vthereby is also rotatably adjustable within vthe cylinder, and -a collar 1S mounted upon the upper end of the cylinder and provided with a set screw 19 and a brake shoe 20 to engage the face of theplunger while the collar 18 is clamped to the exterior' of the cylinder both vby the action of the set screw 19, provides for `rigidly locking the plunger against 'either movement relative to the base.

An actuating shaft 21y provided with a hand lever 22 is journaled in j'bearings23 at the upper end of the plunger 17. A crank arm 24 carriedby the shaft 21 actuates a hydraulic pump carried by and at the lower end of the plunger 17 to pump a liquid from a reservoirv in the plunger 17 into the space within the cylinder below the plunger through one portion of the rotation. ofthe shaft 21, and to open. valve mechanism to return theliquid to its reservoir in the plunger at another position rotarily of shaft 21.

The shaft 21 also serves as a hinge axle by means of which the chair seat, back, arms and foot rest may all 'be' adjusted 1f tata-bly to a variety lof positions relative to the plunger -17,` by reason of said shaft 21 being also "journaled in bearings 23 carried by the chair seat frame 25. In order to limit the rotary movement of the seat frame 25 relative to the shaft 21 I provide a toothed segment 2o attached rigidlyV to the seat frame 25 vprovided lwith two long teeth 27 at opposite ends and a plurality of shorter spaced teeth 28 intermediate of the teeth 27. A latch bar 29 `is pivotally mounted at 30 on the bracket 31 carried rigidly-by the upper end of the plunger 1'7. Theopposite end of said latch bar is connected by a. linlr32 with a projection 33 carried by a yoke 34, which yoke 34 is journaled upon the shaft 21l and provided with an actuating lever by means of y which ,said vlatch bar may ber shifted into and out `of, engagement with the spaced teeth 28 torelea-se; and adjust the chair relative to shaft21 and tolocl the chair to any adjusted position. The latch bar 29 can not be moved out of the path 'of thetwo long,` teeth 27, which thereby predetermine and limit the rotary adj ust-ment of the chair seaty upon the shaft 21. The free end of latch bar 29 is supported by guide. 31.

To cushion the rotary adjustment of the chair seat upon the shaft 2l. and thereby avoid sudden and severe shocks a rod 36 is attached rigidly to the seat trame 25 and is threaded through a slot in an arm 37 projecting from the bracket 3l. A coiled spring 38 and washer 39 cushion the chair movement at one extreme o't the chair movement as the seat is tilted forwardly, and a coiled spring 39 and nut 40 and washer 4l cushion the chair movement the seat is tilted rearwardly, thereby absorbing the shock and tending to counterbalanee the weight of the chair as it is tilted rearwardly. A spring actuated plunger 4Q, pivotally attached to the latch bar 2S) and withits spring 43 engaging the bracket B1, serves to continuously torce the latch bar into engagement with the teeth 28 of segment 2G except when said latch bar is retracted by hand through the lever 35, to thereby prevent excessive or accidental movement ot' seat rotatably relative to the shaft't 2l.

Chair arms 4 4- are independently attached to the seat frame by means of brackets 5. The chair back 46 is hinged at 4:7 to the seat trame, and is adjustable relative to the seat frame through a range of movement from substantially the full line vertical position shown in Fig. 1 to the substantially horizontal dotted line position shown in. Fig. l. A. bar 4:8 is pivotally attached at t9 to the rear of the chair back, and said bar is passed through a correspondingly shaped slot in a latch member :'i() which latch member is pivoted at l between the forked arms oit a bracket attached to the seat frame. xThe Jfree end of latch member :30 is turned nearly parallel to the bar 48, and a wedge actuated by a hand lever 54 provides for a positive lock of the latch member 50 to the bar i8 to hold the chair back rigidly to any adjusted position. Then the wedge is not actively employed the chair back may be moved freely upwardly or forwardly and will be automatically held by the latch member 5() against movement in a reverse direction due to the canting and bindingot the bar 4.8 in the slot in latch member 50. To lower the chair back the latch member :30 is lifted whereupon the bar #LS will move freely down through the slot in latch member 50. The chair back may thus be adjusted from a vertical to a horizontal position and rigidly locked or automatically latched. Then the back is in a. substantially horizontal position, it is also in substantially the same plane with the top ot seat cushion or even inclined downwardly therefrom so that the two of them form an operating table or bed suitable to per'lorm minor operations on children. lVhen the foot rest is elevated into substantially the same plane as the top ot the seat cushion the foot rest, seat cushion and chair back together constitute a table support tor an adult for minor operations.

An apron 56 is attached to the front ot' the seat trame and depends therefrom. and a step or foot rest 57 rigidly attached to said apron. I also provide in addition to the foot rest 57 an adjustable toot rest,

which is preferably provided with two troughs or channels 5S) and (3() adapted respectively to support one or both toet or the lower portion ot the legs of a patient in a variety of positions suitable to be operated upon as for instance by a chiropodist. The foot rest 58 is pivotally supported at 6l in a forked bracket 62 carried by a vertical shank or stem 63, preferably of polygonal cross section. A slotted segment (5ft attached to the toot rest 58 at opposite ends and a (,flamping bolt (35 enable the foot rest 58 to bc adjusted to different angular positions and clamped rigidly to the yoke (S2. The shank (33 is nonrotatably and vertically adjustable in a cross bar 66 to which it may be rigidly clamped by a` set screw (57. The cross bar GG is rigidly mounted upon rods (3S, and ('39 `which slide endwise in corresponding recessesy in the foot rest member 57, where they are held by spring tension against too :tree a movement in said recesses. The foot rest 5S may thus be adjusted horizontally to and from the sea-t frame through a considerable range ot adjustment, and also adjusted vertically and to ditlerent angles ot inclination, whereby the foot ot' the pa tient may be caused to rest in one o't the channels 59 or 60, as shown in dotted line Fig. 4;, with the :toot upwardly or down wardly directed from the seat cushion1 or with the lower portion of the leg supported in one of the channels 59 or 60 and the entire toot overhanging the foot rest 5S. as may be most convenient for the patient or operator.

Attached to the rear ot the upper portion of the chair back is a yoke shaped bracket 7() carrying two parallel horizontally positioned rods 7l and 72. A carriage composed ot two sections 73 and 74 is mounted to slide horizontally on the rods 7l and 72. A clamping bolt 75 connects the. two carriage sections together, and when tightened serves to clamp the two carriage sections together, and also at the same time to clamp the shank 76 of a head rest rigidly to said carriage sections. The shank 76 is adjustable to various positions vertically relative to said carriage sections, and also laterally with said carriage sections whereupon tightening ot a single bolt 75 clamps all the members rigidly in position, and facilitates a wide range ot adjustment for the head rest and a quick adjustment thereof. A clamping bolt 77 serves to clamp two bars 7S and 79 together face to tace. The bar 7 S is pivotally attached at 80 to a yoke 81 which carries two head rest pads 82 and 88. The bar 79 is pivotally attached at 84 to the yolte 81. Bysliding'fbarsS andi9` upon greater varietyot f positions for the head The apparatus herein shown Vvand described 1s capable of considerable modili'cation Within the scope offfthe claims WithoutI departing trom the spirit of my inventions llVliat I claim isi: 1`

l. A chair comprising a base provided with a cylinder, a, vertically adjustable hydraulic` v'plunger n'iountdffin said 5 cylinder' and serving as a chair pedestal, an axle journaled to the upper end of said plunger serving as a pump shaft and provided With a hand lever operable to actuate a hydraulic pump Within said plunger to raise and lower said plunger, a chair seat member comprising a seat, back, and foot-rest, pivotally mounted upon and above said axle, a vertically disposed toothed segment carried by said Vseat member, a latch bar carried by said pedestal and yieldingly actuated to normally engage one of the teeth of said segment, a hand lever adapted to retract said latch bar when it is desired to adjust said seat lmember upon said axle, and resilient means to limit the movement of said chair seat member relative to said plunger at opposite extremities of its movement.

2. A chair comprising a base provided with a cylinder, a vertically adjustable hydraulic plunger mounted in said cylinder and serving as a chair pedestal, a substantially horizontal axle journaled to the upper end of said pedestal and operable as a rockshatt to actuate a hydraulic pump located Within said pedestal, a chair seat rotatably mounted upon said rock-shaft relative to said pedestal to enable said chair seat to be adjusted to different positions of inclination, a rack member carriedV by and depending Ytrom said seat,`a pawl mounted upon said pedestal and resiliently energized to normally engage saidr rack member, a hand lever journaled upon said rock-shaft and operable from the exterior of said seat to retract said paivl when it is desired to adjust said seat, and a hand lever operable from the exterior ofsaid seat to actuate said `rock-shaft and thereby operate Ysaid hydraulic pump. i*

3. A chair comprising a base provided with a cylinder', a vertically adjustable hydraulic plunger mounted in Vsaid cylinder and serving as a chair pedestal, a substantially horizontal axle journaled to the upper end of said pedestal and operable as a rockshaft to actuate' a hydraulic pump located Within said pedestal', a chair seatV rotatably n mounted upon said rock-shaft relative to said pedestal to enable said chair seat to'be adj usted to different positions of incl-ination, a rack member carried by` and` depending from said.l seat, a. paivlfmounted pivotally upon saidl pedestal and resilientlyenergizedi to normally. engage saidra'clr member, means to yleldmglylimit the adjustment of said chair seat atv'opposite extremitiesot its` movement relative tothe pedestal,v a hand lever operable from the exterioroiE said seat to retract Vsaid pawl: when` itis. desired to adjustsaidV seatyand a hand lever operable..

from theicxterior of saidy seat to. actuate said rockshaft and thereby operate said hydraulic pump.

A chair-comprising a ibase provided with a cylinder, a vertically adjustable hydraulic plunger mounted in said cylinder and serving as a chair pedestal, a substantiallyhorizontal axle journaled to the upper end of said pedestal and operable as a rockshalit to actuate a hydraulic pump located Within said pedestal, a chair seat rotatably mounted upon said rock-shaft relative to said pedestal to enable said chair seat to be ,adjusted to different positions of inclination, a rack member carried by and depending lrom said scat, a pawl mounted upon said pedestal and resiliently energized to normally engage said rack member, a yokeshaped hand lever' journaled upon said rockshai't and operable from the exterior of said seat to retract said paivl When it is desired to adjust said seat, and a hand lever operable from the exterior of said seat to actuate said roch-shaft and thereby operate said hydraulic pump.

5. A chair coii'iprising a base. provided With a cylinder, a vertically adjustable hydraulic plunger mounted in said cylinder and serving as a chair pedestal, a substantially horizontal axle journaled to the upper end of said pedestal and operable as a rockshatt to actuate a hydraulic pump located Within said pedestal, a chair seat pivotally mounted upon and above said axle, a vertically disposed toothed segment carried by said seat, a latch bar carried by said pedestal and yieldingly actuated to normally engage one of the teeth of said segment, a hand lever adapted to retract said latch bar when it is required to adjust said seat upon said axle, and resilient means to limit the movement ot' said chair seat at opposite extremities of Vits movement.

(i. A chair comprising a base provided with a cylinder, a vertically adjusted hydraulic plunger mounted in said cylinder and serving as a chair pedestal, a substantially horizontal axle journaledr to the upper end of said pedestal and operable as a rockshaitt to actuate a hydraulic pump located Within said pedestal, a seat, chair back, and ioot rest pivotally mounted upon and above said axle, a vertically disposed toothed segmentk carried by said seat, a latch bar `carried by said pedestal and yieldingly actuated to normally engage'one of the teeth of said segment, avhand lever adapted to retract said latch bar when it is required to adjust said seat upon said chair seat, and resilient means to limit the movement of said axle at opposite extremities of its movement.

i 7. A chair comprising a base provided with a cylinder a vertically adjusted hydraulic plunger mounted in said cylinder and serving as a chair pedestal, an axle journaled to the upper end of said plunger and provided with a hand lever operable to raise and lower said plunger, a chair seat member comprising a seat, back, and foot rest, pivotally mounted upon and above said axle, a vertically disposed toothed segment'. carried by said seat member, a latch bar carried by said pedestal and yieldingly actuated to normally engage one of the teeth of said segment, a hand lever adapted to retract said latch bar when it is required to adjust said seat upon said axle, and resilient means to limit the movement of said chair seat FREDERICK KOENIGKRAMER.

Certificate of Correction.

It is hereb7 certified that in Letters Patent No. 1,542,508, granted June 16, 1925,

upon the application of Frederick Koenigkralnen, of Cincinnati, Ohio, for an improvement in Chairs, errors appear in the printed specification requiring` correction as follows: Page 4, line 5, claim 6, for the Words chair seat7 read Carle, and line 6, for the word axle read Chair seat; and that the said Letters .Patent should be read with these corrections: therein that the saine may conform to the record of the case in the Patent Office.

Sign-ed and sealed this 21st day of July, A. D. 1925.

[SAL] KARL FENNING,\

Acting 00m/missione?"- of Patents.

Images