US1570096A - Chair - Google Patents

Description

CHAIR v WITNE'SES.'

S. STRANSKY Jan. 19 19.26.

CHAIR Flgd Oct. 22. 1924 3 Sheets-Sheet 3 INVENroR im [[15 ATTORNEYl Patented Jan.. 19, 1926.

STEPHEN STRANSKY, OF DARBY, PENNSYLV'ANIA.y

CHAIR.

Application filed October 22, 1924. Serial No. 745,243.

To all whom t may conce/m:

Be it known that I, STEPHEN STRANSKY, a citizen of the United States, residing at Darby, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Chairs, of which the following is a specification.

My invention relates more particularly to chairs of the type having yieldingly mounted seats. Heretofore, in chairs of that general type the seats have been supported about midway from front to rear upon a pivot pin and normally held against tilting rearwardly by springs. The springs are usually adjustable but the adjustment which best suits a light-weight is not at all suitable for a heavy-weight and the springs are rarely, if ever adjusted until the chair is sent to a'shop to be overhauled. The front of the seat must go up as the rear goes down. The center of gravity of the occupant is likely to be thrown too far to the rear of the pivot and if this does not result in a fall, it does cause an unpleasant sensation of falling or danger of falling.

The object of my invention is to provide a chair in which the seat will be free to yield to a limited extent, in which there will be no danger of a material shifting of the occupants center of gravity, and in which a person of light or heavy weight may sit with a sense of security. j

This object, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference b eing had to the accompanying drawings in which* n Figure 1 is a front elevation ef a chair embodying my invention,

Figure 2 a section on line 2-1-2 of Figure l,

Figure 3 a rear elevation of the chair,

Figure 4 a section on line 4-4 of Figure 2,

Figure 5 a section on line 5-5 of Figure 2,

Figure 6 a side elevation showing a modified form of the invention,

Figure 7 a fragmentary rear elevation showing the form disclosed in Figure 6, and

Figure 8 a section on line 8-8 of Figure 7.

Referring to Figures l to 5, l indicates generally the base upon which the chair is mounted. The base consists of two side members 2 which are duplicates and are connected by cross bars 3 and 4, the latter being fixed to upwardly and forwardly projecting extensions 5, and 6 the seat. The seat rests upon side members 7 which are duplicates of each other and upon legs 8 which are connected to the front of the base members by hinges 9. The side members 7 are provided with downwardly and rearwardly projecting extensions 10 connected by a cross bar 11. The extensions 5 and l0 are in line with each other so that the cross bars 4 and 11 face each other but are spaced apart. Coiled springs 12 secured in metallic sockets 13, preferably by cotter pins, and fixed to the bars, are interposed between eross bars 4 and 11 and the extensions 5 and 10 with the coiled springs serve as the rear legs of the chair.

If desired, the chair may be provided 2 with a foot rest 14 slidable in suitable guideways arranged under the seat.

In the form shown in Figures 5 to 8 of the drawings, the seat is supported by legs 8EL extending from the rear of the seat but hinged to the front of the base members and by brace members 15 extending downwardly and rearwardly from the front of the seat and having a fixed connection with legs 8a. Legs 8:L have downwardly projecting parts l0a carrying a cross bar lla which faces a cross bar 4a and an elliptic spring l2EL is interposed between the cross bars 4nl and 1la and secured thereto by channel irons 13H'.

A chair having its seat mounted as above described affords a limited yielding movement which is highlyagreeable. The front of the` seat does not go up when the rear goes down, the center of gravity is not materially changed if the limit of the yielding movement is reached and the occupant enjoys entire freedom from the sense of insecurity incident to use of the chairs with yielding seats heretofore used.

While I have described my invention as taking a particular form, it will be understood that the various parts may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as lfairly come within the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is A chair including a base having horillO Zontally extending connected side members; a seat having a back rest, and side members for supporting the seat; legs supporting the front of the seat and being hinged to the front end of the side members provided on the base; upwardly and forwardly projeeting extensions on the side members of the base; downwardly and rearwardly projectinzg)r extensions on the middle part of the side members supporting the seat; and coiled springs interposed bet-Ween said eX- tensions on the base and on the side members supporting the seat.

In testimony whereof I have signed my name to this specication.

STEPHEN STRANSKY.

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