Патент USA US2107629код для вставки
Feb. 8, 1938. _ c. H. DALLAS Filed Jan. 12, 1937 QM w. 7% 2 Sheets-Sheet l INVENTOR: WITNESSES: . 2,107,629 ADJUSTABLE CHAIR LEG EXTENSION Emszfanm i?pirins Dallas, BY Feb. 8, 1938. I c‘ H DALLAS 2,107,629 ADJUSTABLE CHAIR LEG EXTENSION Filed Jan. 12, 1957 FIG: Y. 2 Sheets-Sheet 2 ' WI TNESSES .~ . W a], W 1 N VEN TOR . . Cansifanaz i’?pirms Dallas) BY Patented Feb. 8, 1938 2,107,629 -UNITED STATES PATENT OFFICE 2,107,629 ADJUSTABLE‘ CHAIR. LEG EXTENSION Constance Hopkins Dallas, Chestnut Hill, Pa. Application January 12, 1937, Serial No. 120,204 7 Claims. My invention relates generally to adjustable attachments for use on various articles of furni ture and more particularly to adjustable exten sions for chair legs. 5 ' ~The use of the conventional high chair is at tended with certain disadvantages. A high chair ‘ at table with the family is awkward. It generally does not match other articles of furniture; it does not lend itself to being drawn closely to loiithe table; and it usually necessitates the incon venience of a tray. Moreover, there are inter mediate stages where children are too large for the average high chair yet not tall enough for chairs used by adults; and the customary prac 15‘ tice of using cushions, books or other articles on the seat of a chair for elevating the occupant to the desired height often results in discomfort. Such a makeshift arrangement is not conducive to good manners or posture and is a distinct ‘20' handicap to the child receiving his ?rst lessons on behavior at table. The principal object of my invention is to overcome the above difficulties by providing an ' adjustable chair leg extension which is simple 25 in structure and operation and may be easily ap plied, removed, or adjusted, as occasion demands, with respect to any of the usual dining room or straight chairs found in the home. I am aware that other adjustable chair leg extensions are 30 suggested in the prior art, but their intricacy and lack of capacity for easy application to- the aver age chair make them unsuitable for general use in the home. Furthermore, the devices hereto fore suggested or employed are either unstable or 35 so elaborate and expensive to manufacture as to be impracticable, whereas the device of this in vention is characterized by extreme simplicity and economy of manufacture and at the same time possesses adequate ruggedness and dura 40 bility, and when removed leaves the chair in its original useful condition. Other objects and advantages of my invention will become more apparent from the following detailed description of one example of the inven 45 tion and a modi?cation thereof, reference being had to the accompanying drawings. Of the drawings: (Cl. 155-88) ment, showing also the felt protector associated therewith. Fig. IV represents a cross section, taken as in dicated by the lines IV—-IV of Fig. III. Fig. V represents a side view of the foot portion of the extension member. Fig. VI represents a perspective view of the holding element which is attached to the chair leg end, showing the spur which sinks into the chair leg. 10 Fig. VII represents a cross section, taken as indicated by the lines VII-VII of Fig. II; and, Fig, VIII represents a cross section similar to that of Fig. VII, but showing a modi?ed form of clamping means comprising a rolled metal strip instead of the collars shown in Figs. I and II. With particular reference to Figs. I and II of the drawings, there is shown a conventional chair I having legs 2, to each of which is applied an adjustable attachment of my invention. Each such attachment comprises generally an exten sion member 3, a holding element 4 secured to the end of the chair leg 2, and clamping means in the form of collars 5. There is desirably inter posed between the extension member 3 and the chair leg 2, and between the collars 5 and the chair leg 2, a protective cushion of felt or like material as indicated at 6. The extension member 3 is shown most clearly in Fig. III. It comprises in its preferred form a bar of metal having vertically spaced slots 1 15 20 25 30 therein, the bar being curved transversely throughout its length to conform to the curva ture of an ordinary chair leg. At its lower end, the extension member 3 has a rounded foot 8, 35 an enlarged view of which is shown in Fig. V. The curvature of the foot 8 is of particular ad vantage where the chair legs are inclined at an angle to the vertical, in which case it affords a substantial surface contact with the floor. At its 40 upper end the extension member 3 has grooves 9 in the outer surface which are designed to ac— commodate the collars 5 with a snug ?t. The felt protector 6 comprises a strip generally conforming to the shape of the extension mem- 45 her 3 and having holes I!) therein which register with the holes '3 of the extension member, and it Fig. I represents a perspective view of a con includes additionally a split cylindrical portion ventional chair with attachments embodying my I2 which surrounds the chair leg 2 within the 50 invention applied thereto. collars 5. In an obvious manner the use of such 50 Fig. II represents an enlarged side elevation of 'a protector permits the attachment to be applied one chair leg, partially in section, showing de and removed or used over a long period of time, tails of one such attachment. all without injury to the chair. Fig. III represents a further enlarged perspec The holding element 4, as shown most clearly 55 tive view of the extension member of the attach in Figs. II and VI, comprises generally a disc por- 55 2 2,107,629 tion l3 and a hook portion l4. Within the disc ‘portion l3 there is a countersunk aperture l5 through which a screw I6 is inserted for securing the holding element to» the end of the chair leg 2. Additionally the disc portion I3 is provided with an upstanding spur II which sinks into the end of the chair leg and prevents the holding ele ment from turning about the leg end. The hook portion l4 projects upwardly and laterally and is adapted to engage selectively ‘any one of the holes ‘I in the extension member 3, the engage ment being such as to hold the extension member firmly against the bottom end of the chair leg 2. The collars 5 are shown most clearly in Figs. II and VII. Each collar 5 is constructed of rela tively resilient material and has ?anged ends l8 secured together. by means of a screw l9 andnut 20. The collars 5 may be adapted to ?t chair legs of various shapes and sizes. Inasmuch as they ?t 20 Within the grooves 9 of the extension member 3, the collars 5 are held against displacement and prevented from sliding with respect to the chair leg 2. ‘ In Fig. VIII of the drawings, there is shown a ,modification of the invention in which rolled metal bands 5a are employed in lieu of the col lars 5. Each such band comprises a continuous strip with one end 5?) bent around the extension member 3 at one of the slots 1. The strip is 30 , then passed around the chair leg 2 exteriorly of the cylindrical portion l2 of the felt protector. vention may be applied to other articles of fur niture in addition to chairs, all without depart ing from the spirit of the invention as de?ned in the annexed claims. Having thus described my invention, I claim: 1. In combination with a leg for a chair or the like, an extension member having vertically spaced slots formed therein, and adapted to be selectively engaged, a holding element having a down-turned hook and attached to the leg end, 10 said ~ hook engaging said extension member through one of said slots and holding it against said leg, and adjustable clamping means secur ing‘ the upper portion of said extension member against said leg. ‘ 15' I 2. The invention of claim 1 characterized by the further fact that there is a protecting cush ion between said leg and said extension member and between said leg and said clamping means. 3. In combination with a leg fora chair or 20 the like, ‘a, transversely curved ‘extension member having vertically spaced slots formed therein and a rounded foot formed on the end thereof, a pro tecting cushion attached to the inner side of said. extension member and engaging‘said leg. said protecting cushion being formed substantially to encircle said leg atfthe top of the extension, member and having openings formed; therein to; correspond with said slots, clam'pinggmeans se_-_> curing the upper portion ofv said extension‘memw 30,-i ber to the legand being separated from the leg Desirably the stripis passed twice aroundjthe ‘ by said upper part of ‘said, protecting, cushion, leg in the manner clearly illustrated in the draw ' and holding means'screwed, to the, legxendysaid , ings, with the free end 50 ultimately drawn taut holding means, having a spur to engage, said; leg .' ,and rolled and swaged into the slot opening '1. end and consisting, of a disc portion ?tting over 351 Such an arrangement ?rmly clamps the exten the leg end and 'a hook portion, said hook_por—_ sion member 3, and it has the advantage that tion extending upwardly wherebyvit is, clear. of' the floor when said disc portion rests on the ?oor. it can be used on chair legs‘oi different cross sectional shapes. Also, this form of adjustable, 4. In combination with ,a leg for a chair or the like, an’ extension member, havingv vertically 49. . 4Ov clamping means presents a very neat appear " ‘ ance, particularly in view of the fact that the 45,, spaced slots formed therein, and adapted to be rolled end 50 may be housed within the 'slot 7 selectively engaged, said extension member hav in such manner that there are no unsightly pro ing a rounded foot and’ being curvedtransversely, jections. to'?t against said leg, a holding element attached to the leg end and engaging said extension mem 45; ' From the above description it will be apparent that the attachments of, my invention may be readily applied to and removed from the legs of diiferent kinds of chairs. Moreover, one special ber through one of _ said slots and ' holding it against said leg, and adjustable clamping, means, securing the upper portion of. said extension advantage is that the holding element 4 may be permanently applied to the leg ends of a chair, member against said leg. , and when it is desired to elevate the chair, the, like, an extension member having vertically extension members 3 and clamping means 5 or, 50, may be quickly attached. In this connection it will be noted that the hook portion M oi” the. , holding element 4 is so constructed that it ex ' “tends clear of‘ the ?oor when the disc portion I3 rests on the floor. . Although the constituent elements comprising the adjustable attachments of this invention are co, extremely simple and may be produced at a low ‘ manufacturing cost, the attachments are never theless very efficient in operation and possess adequate stability. One important factor in pro ducing such stability is that the extension mem bers 3 are held ?rmly against the side of the chair ‘leg both at the upper portion where the clamping 5. In combination with aleg fora ehairor the, 50. spaced slots formed-therein, and adapted to be selectively engaged,’ a holding element attached, to the leg end and engaging, said extension mem ber through one of said slots and holding it, against said leg, said holdingielement having a, spur which is sunk’ into the legend to keep said. holding element from turningmabout the legend, and adjustable clamping means securing the upper portion of said extension member against :60. said leg. ‘ ' ' ’ 6. In combination with a leg for a chairor the‘ like, an extension member, having vertically spacedyslots formed therein, and adapted, to be. selectively engaged, a;holding__ element attached, 65 to the leg end and engaging said, extension meme . means are employed and at the bottom of the ' ber through one of said slots and holding-it, 70. leg where the holding element with its hookpor-v against said leg, said holding element including tion tightly grips the extension'member 3. a flat disc for ?tting on the leg end, and an 8H9. While I have described my invention with ref erence to one example, showing, however, two types of adjustable clamping means, it will bev gaging hook extendingup. from .said ?atdisc, .70 whereby the normal use ofthe'leg is not impaired when the extension member is removed, and ad-. apparent that numerous changes or modi?cations _ justable clamping means securing the- upper may be made in the form of the attachments portion of said extension. memberagainst said and. the various, parts thereof; and that. the _in— leg‘ < r ._ . 2,107,629 7. In combination with a leg for a chair or the like, an extension member having vertically spaced slots formed therein, and adapted to be selectively engaged, a holding element attached to the leg end and engaging said extension mem ber through one of said slots and holding it against said leg, and adjustable clamping means securing the upper portion of said extension 3 member against said leg, said clamping means consisting of a metallic tape wrapped around the leg and through one of said engagement slots and a rolled end swaged into the slot opening provided by the thickness of the extension mem- 5‘ her. CONSTANCE HOPKINS DALLAS.