US 1237956 A
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Description (OCR text may contain errors)
R. B. PUE.
APPLICATION FILED MAY I5, 1914.
Patented Aug. 21, 1917.
- 2 SHEETS-SHEET 1.
Uzets'ses/ R. B. PUE.
PPLICATION FILED MAY l5, 1914.
Patented ug. 21, 1917.
2 SHEETS-SHEET 2.
` .scribed in which the seat-is automatically returned to its original position as soon asl RIGHE IB.PUE, 0F BALTIMORE, MARYLAND.
Specification of Letters Patent.
Patented Aug.. 21, 191'?.
Application led May 15, 1914. Serial No. 838,800.
scribed improvements in or relating to the.
mounting of the seat, whereby the latter is enabled 'to slide forward automatically on its stand, under the weight of the occupant, thus bringing the said occupant closer to the desk or table at which he happens to be working without effort on his part, and, also, increasing his range of reach on all sides.
y invention further proposes lan oce or desk chair Aof the general type 'above dethe occupant rises, and it\ contemplates, above all, a mounting which may be readily applied to vany conventional form of chair without requiring rearrangement of parts,
or the employment of additional parts otherv than those comprehended in the mounting .itself, and which will in no way interfere with the ordinary revolving and tilting movements of the seat.
ith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as hereinafter described and claimed, an embodiment of the said invention \being illustiated in the accompanying drawing, where- 0 1 l Figures 1 and 2 are sideand rear elevations, respectively, `of the improved chair, the latter appearing in full lines, (Fig. l), Ain its forward or advanced position, and 'in dotted lines. in `its normal position;
Fig. 3 is a perspective view of the mounting, per ee;
Figs. 4 and 5 are enlarged transverseand longitudinal sections of said mounting, respectively, taken on lines 4 4 and 5 5, Fig. 3; and
Fig. 6 is a. pe l ective view of one of the vcages for the anu-friction; bearings.
Referring more particularly to said drawing, 7 and 8 designate, respectively, the seat and stand elements of a revolving and tiltmg desk-chair of conventional type, the second-named element embodying the usual base 9 and adjusting screw 10, to which latter is pivoted the forked bracket 11 that supports the seat andv is directly axed thereto. f
According to the present invention, however, there is interposed between the chair seat and the aforementioned bracket 11 a pair of coacting frames 12 and 13 which constitute the improved mounting and which are designed for relative movement, one frame being fastened to said bracket and the other to the chair seat, in consequence whereof provision is made for the desired forward and backward movement of said sfeat. Both frames are of rectangular shape and, substantially, of the same general dimensions, and they are'so constructed and arranged that one of them incases, so to speak, and thus acts as a carrier for the other.y Either frame may be attached to the bracket 11, and the other to the chair seat; but-in the preferred form of the invention, which, for all practical purposes, is thatillustrated, the outer or casing frame 12 is attached to the seat, and the inner frame 13 to the bracket. rlhe former frame may, therefore, be considered as the mov-v able or sliding member of the mounting, and
the latter frame as the xed member.
From Fig. 3, wherein the two frames 12 and 13 are best shown, it will be seen that each comprises a' pair of longitudinal sideF bars or rails, and front and rear cross-pieces connecting the corresponding ends thereof. The bars 13 of the iixedframe 13 are solid and have their upper and lower faces concaved throughout their entire extent, thereby providing tracks in which the spherical anti-friction rollers 14 travel, the rollers associated with each of such bars being mounted in a cage 15. The cross-pieces 132 of this frame are likewise solid. The bars 12 of the sliding frame 12 each consists of connected top and bottom members, `between which the bars 13 are slidably fitted, and these bars 12', as shown, are preferably constructed of steel tubes which are slit longitudinally and slightly Hattened into elliptical shape in section, by reason of which construction it will be seenfthat their curved top and bottom portions will project over lim 6o f standing lugs or fingers constructed u-pon of the races for the bearings. The crosspieces 122 are in the nature of straps, which extend across'the tops of the bars12 and are bent downward at their ends and secured to the sides of said bars, and it is to 9 these straps or cross-pieces .that the chair seat is directly fastened. The two sides or arms of the bracket 11 are fastened at their terminals to the cross-pieces 132- of frame'13.-
vIn consequence of the arrangement above described, it will be apparent that the seatl of the chair is capable of a forward movement bodily, irrespective ofthe direction in which the chair is facing,`and in orderto drawn' toward the same without effort on his part', 4and thusl caused to assume a more nearly'correct position'for the work with which he may happen to be busied, and in like manner, his range of reach is increased and he is enabled to reachv objects whichv would otherwise require his leaving the chair. It is intended, however, to restrict a the forward movements of the chair seat to times when it is actually occupied, and,`
' moreover, to return the seat to its original position as soon as the occupant rises, this being effected by a suitable retractile spring n or springs 17, here`shown as connected at opposite 4.ends to the rear cross-pieces 122 and 132 ofthe frames' 12 and 13, respectively;
To the movements ofgthe sliding frame in opposite directions, stops are made use of, these stops being here represented as loeatedboth at the fronty ends of the side .bars 12 of the frame mentioned, and intermediate the front and rearv ends. The latter, or intermediate stops 12s are designed to terminate the forward -movement of the frame, and effect such termination by engaging the forward cross-piece`132, .while the end ystops 124. similarly engage the forward ends fof the 'frame bars 13 and are constituted by horizontal lugs or fingers .which are secured directly to the down- -turnedends of the cross-pieces 122, the'said intermediate-stops 123 being formed byupthellower longitudinal edges of bars 12 and `lined or faced,
if desired, by suitable cushioning material. l v f The-.cages 15,1whichjcarry the bearing rollers 14, are referably made of sheet metal bent into -section, 'as shown in Fig. 6, this construction enabling them to clasp the bars 13', and their upper and 'lower vwings to extend across the corresponding concave faces of said bars, the seats 15 wherein the rollers'v are disposed being formed by openings 15 in said wings. Stops are also providedin connection with these 'cages to prevent their displacement from bars 13 front and rear pairs of screws 125 andil 6, which are setlaterally into said bars a the proper points, being preferably employed. Gonsequently, when the sliding Y frame reaches the end of its forward movement, the stops 126 will contact with the rear ends of the side walls of the cages, and, similarly, the stops 125 will contact with the forward ends of said walls at the conclusion of the return movement of the frame.
It is to be` understood that the invention will. End its application not only in connection with revoluble chairs, as above set forth,
but also with automobile seats, car seats, dining chairs for steam ships, etc.
The invention, its complete construction and manner of operation, and its advantages are believed to be apparent from the foregoing, and, accordinglyfto require no further description. v
t may be stated, however, that the arrangement of the two frames may be reversed and the outer frame attached to the arms of bracketvll while the inner frame is attached to the chair. In .such instance, the outer frame will be fixed and the inner frame movable, .but as in all other respects the arrangement' is exactly identical with that shown and described, additional showing and description is deemed unnecessary. I claim i 1. An extension for slidingA chairs or seats, adapted to be interposed between lthe seat proper and the stand of the chair or seat, and comprising eo-acting, slidably-engaged fixed and movable rectangular frames, each composed of a pair of longitudinal side members and front and rear cross-pieces connecting the corresponding ends thereof, one'of said frames incasing the other and acting-as a carrier there.- for; a pair of stops provided on the side members of the movable frame intermediate the ends thereof 'and arranged for engagement with the front cross-piece of the xed' frame, to limit the forward movement of the movable frame; and a separate pair of stops provided upon one end of the .aforesaid sidemembers and arranged for engagement with 'i the front end of the side members of the said fixed frame, to limit the rearwardn v movement of the movable frame.4
2. An extension mounting for sliding chairs or seats, adapted to be interposed between the seat proper and the stand of the arate pair of stops provided upon the front 15 endsof the said side members of the incasing frame and projecting laterally inward into position for engagement with the front ends of the side members of the said fixed frame, to limit the rearward movement of 20 the movable frame.
In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.
A p RICHARD B. PUE.
FRANcEs T. BANNON, SARAH E; BAKER.