US1379263A - Chair - Google Patents

Description

C, JELLINEK AND D. STERN.

I CHAIR. APPLICATION FILED AUG; 9, 1919. 1,379,263. Patented May 24, 1921,

2 SHEETS-SHEET I.

c. JELILINEK AND'D. STERN.

CHAIR.

' APPLICATION FILED AUG-911E219.

1| I 1 w H- m n 0 a 9 w UNITED STATES PATENT OFFICE.

CHARLES JELLINEK ,AND DAVID STERN, OF NEW YORK, N. Y;

CHAIR. I

Application filed August 9, 1919. Serial No.

To all pchom it may concern:

Be 1t known that we, CHARLES JELLINEK and DAVID STERN, citizens of the United States, residing in the city, county, and State.

of New York, have invented certain new and useful Improvements in Chairs, of which the following is a specification.

Our invention relates in general to a swinging chair for use in connection with sewing machines, counters and like places where it is desired to movethe chair from an inoperative position in an out of the way place into an operative seating position, and particularly relates to such a device designed to be mounted on a sewing machine stand or other support normally subjected position beneath the benches when relieved of the weight of the operators. There is an available space below the work bench and above the control pedal of the machine in which the seat can be conveniently stored,

and accordingly one of the objects of the invention is to provide a simple form of seat support which can be moved quickly and easily from its operative supporting position into this available space. A refinement of this improvement contemplates the designing of a chair support which can be attached to the standard forms of bench supports and whichcan be made of such small compass as to be accommodated in the space above suggested but which can be readily withdrawn from this space and located so as to dispose the operator in any desired position relative to the sewing machine adjacent the seat.

These space limitations imposed upon the structure necessitate an organization of parts which can be collapsed sufiiciently to accommodate the same in the suggested space and at the same time provide a relatively long reach b yond the s pport,

Specification of Letters Patent.

Patented May 24, 1921.

A further object ofthe invention is to proyide a construction of the type outlined and in which the weight of the person occupyin the seat will be transmitted vertically and directly to the floor independently of connections with the support so as to minimize the transmission of vibration from the ma chineparts to the operator.

Various other objects and advantages of the invention will be in part obvious from an inspection of the accompanying drawings and in part will be more fully: set forth in the following particular description of one form of mechanism embodyingour in vention; and the inventionalso consists in certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

Referring to the accompanying drawings:--

Flgure 1 1s aview in frontelevation showing 1n full lines a preferred embodlmentof our invention with the seat in supporting position and attached to a conventional form of sewing machine bench; This figure also shows in dotted lines the inoperative position of the parts when foldedin an out of the way position'under the sewing machine a bench:

Fig. 2is a plan view looking down upon the'device shown inFig. 1 with parts of the machine bench broken away to show details of the mounting of the bracket support;

Fig. 3 is an'enlarged plan view of the bracket support shown in Fig. 2Ilooking down upon the disclosure shown in Fig. 4 as indicated by thenumbered arrow;

Fig. 4 is a view in side elevation of the device shown in Fig. 3 looking at the same from the left hand side as indicated by the numbered arrows;

Fig. 5 is an enlargeddetailed view in side elevation of the X-connection between the numbers of the parallel motion shown in Fig. 1;

Fig. 6 is a plan view looking the detail shown in Fig. 5; and

Fig. 7 is a vertical sectional view taken thrp ugh the chair supporting member shown in i 1. V

In the following description and in the claims, arts will be identified'by specific down upon names ,or convenience of expression but they'are intended to be as generic in their part 10 of a work bench or framework of a 1 sewing machine or other suitable article of i furniture. In this disclosure the member 10 is shown to be an upright Lbeam which 7 when considered as partof a sewing machine construction is subjected to the vibrations: and arsincidental to "the running of such machines. There is alsofdisclos'ed in 1 the conventionalform of machine supporting work-table 11 and foot control structionsu c 7 The chair constituting the subject-matter press pedal 12, allas is-usualin such con of this disclosure may becons'ideredas an -=attacihment 5 This attachment includes a "bracket supporting member 13 herein shown jparticularly in Fig. 3 to be in theform of a two-jawed clamp containing the forward flange of'them'ember 10 and securely and rigidly fixed thereto 'by-means of a through bolt 14;. One of the members is provided with a lateral extension 15 from which proj'e'ctsa'curvecl and vertically'disposed cam lfi concentrically disposed with reference to thevertical axis of movement of a chair supporting bracket 17 Thefi-bracket 17 comprises two vertically spaced apart arms 18 and 19 which arms are each formed of two parallel metal strips 20 and 21 fastened together along their lengths pacing blocks 22 so as to provide alight rigid construction;

f The lower arm 19 -is pivotally connected to the supporting member 18 by means of a ivotal connection 23 which m't p per 1 S Vet in dotted lines 1n F1g. 1.

tical movement of the arm 19 and theupper arm -18-issimilarly connected pivotally-to the supporting member '13 by means of a bolt' 23 which is passed vertically through V the member 13 and into the connection 23 t o-which it is demountably affixed by means of a setscrew 24. The outer ends of the arms 18 and 19 arepivotallyconnectedin spaced apart-relation by means ofan X-con- "nection 25 sothat the arms 18,' 19 and con- :nection25 coact to provide a parallel motion. This construction is designed tomaintain the" X-connection vertically disposed and with a freedom ofmovement both hori- -zontally andw' ertically' in both directions about the supporting member 13. This X- 'connectionis preferably made intwo parts with the parts fastened together by means of a through bolt 26which arrangement is designedato. facilitate the mounting of the formed ofan uppervmember 28 and a lower member 29 fastened together by connecting rods 30 and each pivotally connected-to vertically disposed bearings 81' constituting the v forward sides of the X-connection 25. Like the bracket, both members of this extending arm 27 are'formed of parallel strips of metal fastened together in spaced apart relatlon.

, The free end of the swinging arm 27 is pivotally connected to an upstanding tubular 1116111b1"32,"13l16 lower end of which is provided with wide-spreading legs 33 designed to engage the'floor and thus support the weight of the person occupying the seat '34. This seat is mounted upon an adjustable rod 35' telescoping into thetop of the tubular member 32 and guided therein by spacing collars36. "The rod 35 is provided with a series of pinopenings 37 designed to accommodate a pin 38, betweenciwhi'ch pin and the top-0f the member 552 is positioned afchair supporting.- andcushioning spring 39.

Another spring 10 has its opposite. ends connected to the swinging arm andto the elevating bracket, across the innerangle formed by these two membersias shown ;in i Fig. 5, and normally acting upon the swinging arm to move the chair supportingmember toward the supporting-member 13 and into the space beneaththe table as :previously suggested: and'as shown in, dottedlines in Fig. 2.- "Al bracket swinging-and elevating spring 41 extends lbet-weenutheextension 15 of thesupporting;memberiand:the elevating bracket; normallyacting upon the bracket to swing the same inwardly itoward the machine so as tocause thecbracket to rise up the'incline' provided by the cam 16 and thus move the chair andzits: supporting parts from the" lowered position shown' in full lines into the elevated position shown lf'desiiedy a-rod2412has its upper end pivoted to and depends from 'the- -worktable 11 and a-spring43 fixedto the lower end of the rod normally acts on the arm 18 to raise the same into its dotted-line--position beneaththe table as shown iiiFig 1.

In operation, assuming thatlthe'chairism its :norm-alpos1t1on beneath the 'worketable 11, the-user pullswthe'chair forwardly and against the tension of'thes springs 101 and 41 until the seat is over thevposi-tionrelative to the machine in which the operator desiresto be seated. Pressure upon the seat-as byfsitting thereon, is transmitted through 1 the sp1*ing:39,places the same under tension; and acts through the tubular member 32 to lower the legs 33 into engagement with the floor as shown in fulllines in Figal. A't;this time it will be noted that the :person occupying {the seat issupported directly from 'thefloo'rjand is not affected .by any vibratory "movement inherent in the supporting member 10. ,EVibratory movementzof, lthetmemberi '10 in. any

cannot be felt by the person occupying the seat.

Itis obvious that the seat may be. advanced along the front of the work-table to either the fighter left ofthe position shown in Fig. 2 and by rotating the support 35 the front edge of the seat may be alined with the work table or in any angular position with reference to this edge. When pressure is removed from the seat the coiled spring 39 reacts to elevate the seat 34 to any desired distance dependingupon the positioning of the pin 38, thus insuring the proper position of the seat when finally rotated into its out of the way position. The spring 40 acts on the swinging arm to shift the same inwardly thus reducing the angle illustrated in Fig. 6 and moving the seat into its proper posi tion to clear any other object beneath the work-table and before the spring 40 has had time to swing the elevating bracket into its folded position. The spring 41 acts directly on the swinging bracket to move the same toward the sewing machine table and at the same time causes this bracket to ride up the cam 16 thus directing the elevated seat into its out of the way position and over a previously defined path so as to clear any obstacles present.

By means of a device of this character it is possible for the operator at the seat to jump up therefrom and feel assured that the seat will move promptly and quickly over the present path and into the space provided for the same beneath the work-table. At the same time it is possible to pull the chair from beneath the machine and to position the same in any location within the limits of the space inscribed by the elevating bracket and swinging arm when distended in alinement.

Devices of this kind, when installed in factory work, are subjected to hard usage so that the invention also features an openwork construction possessing a strength sufficient to resist distortion during use and at the same time minimizes the amount of material and workmanship necessary to construct such a strong article. By suitably adjusting the tension or length of the several springs, the sequence of movements of the several parts may be so timed as to insure the clearance of any obstacles disposed in the path of movement of the seat when moving into its inoperative position. The parallel motion type of bracket disclosed insures the maintenance of the seat in vertical position while permitting vertical and horizontal movement thereof and this construction also contributes to the rigidity and strength of the bracket as a whole.

While we have shown and described, and have pointed out in the annexed claims certain novel featuresof our invention, it will be understood (that various omissions, substitutionsand'changes in the form anddetails of the device illustrated and in its operation may be madeby those skilled in the art without departing from the spirit ofthe invention.

Having thus-described our invention, we claim 1. In a device of the class described, the combination of a bracket supporting member provided with an elevating cam, a chair elevating bracket pivoted for horizontal movement about a vertical axis and movable vertically in its swinging movement across said cam, said bracket formed of two vertically spaced arms with one end of each pivotally connected to the supporting member, an X-connection pivotally coupling the free ends of said arms, a swinging chair supporting arm pivoted to said X-coupling for horizontal movement relative thereto and a spring acting on said supporting arm and said bracket to swing the arm toward the supporting member.

2. In a device of the class described, the combination of a bracket supporting mem ber provided with an elevating cam, a chair elevating bracket pivoted for horizontal movement about a vertical axis and movable vertically in its swinging movement across said cam, said bracket formed of two vertically spaced arms with one end of each pivotally connected to the supporting member, an X-connection pivotally coupling the free ends of said arms, a swinging chair supporting arm pivoted to said X-coupling for horizontal movement relative thereto, a ground engaging member carried by said swinging arm and a seat mounted on said ground engaging member whereby weight on the seat is transmitted directly to the I said member for moving the chair either to an inward inoperative position or to an out ward operative position, said means causing said chair to have a parallel bodily movement upwardly as it is moved inwardly.

5. In a device of the class described, a support, a chair, means for normally supporting the chair in an inwardly raised po- V sition, said supporting means being .eonan inward and upward: movement, said structed and arranged to give the chair a. means'including a parallel mobionconnnec- 10 bodily parallel movement downwardly as the tion. a chair is moved outWa-mlly. v SignedJat New Yorkieit: .5 in thecountyaof 5 f 6. The combinationbf a' support, a-chair New York and State of l\ew York, this 3nd mounted formovement about said support, day of Ju1y,;l919-., and co-acting means between the: support a 7 CHARLES'JELLINEK. anclth'e chair for causingsaid chair to have y; DAVID STERN)

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