US1251649A - Chair-leg extension. - Google Patents

Description

H. N. ENHOLM.

CHAIR LEG EXTENSION.

APPLICATION FILED JUNE 1. 1917.-

1,251,649. Patented Jan. 1,1918.

HILIYIER N. ENHOLM, OF LOMAX, ILLINOIS.

CHAIR-LEG EXTENSION.

Specification of Letters Patent.

Patented Jan. 1, 1918.

Application filed June 1, 1917. Serial No. 172,239.

To all whom it may concern.-

Be it known that I, HILMER N. ENHOLM, a citizen of the United States, residing at Lomax, in the county of Henderson and State of Illinois, have invented certain new and useful Improvements in Chair-Leg EX- tensions, of which the following is a specification.

This invention relates to improvements in devices adapted to be attached to the front legs of a chair to enable the chair to be tilted to dispose the seat at any desired inclination, and has for one of its objects to simplify and improve the construction and increase the efliciency and utility of devices of this character. 7

Another object ofthe invention is to provide a simply constructed device which may be readily applied without material structural change to chairs and similar devices of various forms and shapes, and transferred from one chair to another.

WVith these and other objects in view, the invention consists in certain novel features of construction, as hereinafter shown and described and then specifically pointed out in the claims; and in the drawings illustrative of the preferred embodiment of the invention Figure 1 is a side elevation of a convenventional chair with the device applied to One of the legs; 7 I

Fig. 2 is an enlarged side elevation of the improved attachment partly in section;

Fig. 3 is a section enlarged on the line 33 of Fig. 1;

Fig. 4 is a transverse section on the line 4-4 of Fig. 2;

Fig. 5 is an enlarged detached view of one of the trigger devices.

The improved device comprises a stock 10, preferably tubular to decrease the weight without reducing the strength, and provided with a laterally directed rib 11 at one side, the rib being provided with a plurality of notches or recesses 12 at spaced intervals in its lower porticu. A cushion of yieldable material, such as hard rubber represented at 13 is secured in the lower end of the stock 10, and forms a cushion bearing to engage the floor upon which the chair rests. The member 10 is arranged to slide vertically in a supporting bracket, the latter adapted to be attached to the front legs of a chair. The bracket device comprises an upper member let having a guideway portion 15 through which the stock 10 moves, the bracket device having a channel through which the rib 11 moves. The bracket device likewise includes a lower member represented as a whole at 16, and having a guideway 17 for the stock 10. The members 1416 are connected by a supporting memberlS asshown. Two of the stock dcvlces and their supporting brackets will be employed, one for each front leg of the chair, and the body portions lt lb of the brackets are formed to engage the chair legs, one of which is represented at 34;. The leg 34E of the chair employed as an illustration is square, and the bracket member 14 isformed with webs 19 disposed atright angles to each other and apertured to receive holding screws to enable the webs to be fastened to the chair leg, while the bracket portion 16 is likewise formed with branching webs 20 for the same purpose.

The web portions l920 will be formed to fit the shape of the chair leg to whichlthey are attached, whether round, square or other form, as will be obvious.

The bracket member 16 is preferably longer than the bracket member 14, so'that when the chair is supported in tilted position as shown in Fig. 1, the stock 10 willv be substantially perpendicular.

The bracket member 16 is formed with a relatively large opening or slot 21, and pivoted at 22 within the slot 21 is a stop pawl 23, the point 24: of the pawl engaging in the recesses 12 one ata time to lock the stock member 10 in the guide brackets at any desired point. At its opposite end the pawl device 23 is supplied with a pull wire 25 leading upwardly to a point convenient to the seat portion 26 of the chair. The pawl 23 is provided with a holding spring 27 which operates to hold the pawl yieldably with its point 24 in engagement with the adjacent recess 12. The bracket member 14: is provided with a guide slot 28 through which the wire 25 leads. By this arrangement it will be obvious that the stock 10 may be adjusted vertically through the bracket members, and locked at any desired point within the range of the recesses 12.

Attached to the seat 26 of the chair at convenient points are trigger devices, one of which is represented in Fig. 1, and each comprising a base portion 28 and an operating lever 29, the latter pivoted at 30 in the base 28. The pull wire 25 is attached at its upper end as represented at 31, to the pull lever 29. The spring 27 will be sufiiciently strong to maintain the pull wire 25 relatively taut and the pull lever 29 in its lower position. lVhen the chair is to be adjusted the operator simply movesthe lever devices 29 upwardly to release the pawl devices 23 and permit the members 10 to fall by gravity the required distance, and then when the lever devices 29 are released'the springs 27 will automatically cause the pawl devices 23 to engage-with the adjacent-notches or recesses 1:2, and thus lock the stock-members 10 in the desired position, and hold the chair seat 26 at the required a ngle orinclination.

At its upper end eachof the stock members lO is-provided with a lateral projection 32in advance of the rib 11, while the bracket me aber lat is provided with a socket indicated at 38 to'receive-the projection 32 when the stoclrmember 10 is moved into its lower position. The projection 32 thus operates as a. stop to prevent the stock member from moving downwardly beyond a certain predetermined position, to prevent the stock device from dropping from the bracket in event of the pawl device 23 being retained in withdrawn position.

The stock device 10 together-with its rib 1.1 and the bracket members including the connecting bar 18 will be of metal, as light as possible consistent with the strains to which it will be subjected, and may be platechjapanned or otherwise ornamented or protected.

It will be understood that two of the base membersQS and the operating levers 29-will be'employed, one foreach of the stock devices 10.

copiesiotthispatent may be obtained for Having thus described the invention, what is claimed as new is:

l. A device of the class described, comprising a bracket including a connecting member and upper and lower members of unequal length and adapted to be connected to a chair leg and each provided with a guideway, a stock slidable through said guideways and maintained in a substantially vertical position when the chair is tilted, and means for locking said stock inposition relative 'to said bracket.

2. A device of the class described comprising a bracket-including upper and lower connected members adaptedtobe attached to a chair leg and-each having a guideway, a.

able through said guideways and having a plurality of notches, apawldevicecarried by one of-said bracket members and engageable with said notchesone at a time, anda pull inemberconnected to said pawl device and extending-through said guide-recess.

In testimony whereof I affiX my signature. HILMER'N. [n

five cents each, by addressing the Commissioner of'fPatents,

Washington, D. G.

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