US107924A

US107924A - Improvement in rocking or tilting-chairs

Info

Publication number: US107924A
Authority: US
Publication date: 1870-10-04
Anticipated expiration: 1887-10-04

Description

and epm.

JAMES LAMB, lor HUBBARDSTON, MASSACHUSETTS.

Letters Patent No. 107,924, dated October 4, 1870.

IMPROVEMENTv IN4 RQCKING OR TILTING-CHAIRS.`

The Schedule` referred to in these Letters Patent and making part of the same.

To all persons to whom these presents fmayconw:l

Be it known that I, JAMES LAMB, otHubb'ardston, ofthe county of Worcester and State of Massachusetts,'l1`a`ve made a new and useful invention vhaving reference to Rocking or Tilting- Chairs; and do hereby deolare the same tobe fully described in the fol- `lowing specilication, and represented in the accom-Y panying drawing, of Which- Figure 1 is a side elevation; Y Figure 2, a vertical section andy A Figure 3, a front 'elevation of a chair, provided or constructed in accordance with my invention. Y 'Y 0n February the 25th', A. D. 1868, Letters Patent No.'74,920 lof'the United States of America were e granted to me on an improved rocking-chair, the subject of the 'claimmade therein being anarrangement ias well as a combination of zigzag and side or leaf springs with the chairseat and base.

In carrying out my present invention, Ihave wholl y dispensed with therleafsprings, and althoughl use springs-analogous to the zigzag s rings, I do not dispose them beneath the `middle oft e chair-seat, but

I arrange ,two pairs ot' the springs in or underneath two opposite` sides of the chair-seat, cach pair being disposed at orfnear'the middle of each side of the seat, andsupported in one of the`v two top bars, of the leg-frame.

Each ofthe springsl now use is composed o'f a strip o 'f steel, bent in a serpentineform, as -sbown in the drawing, in which-sand i s are the twin springs of eac-h pair, th'ey being arranged `close together, and so as to' stand or project in opposite direotionsfrom their medial vertical line, the ooncavity of one spring being next a concavity of the other;y

Eachgof the said springs, at or near its upper end, is bolted or fastened to the chair seatA, and at or'near its lower extremity, to a top bar, b, of the leg-frame B ofthe chair, l

. The seat is separate in other respects from the leg; frame, and maybe provided with a back, C, or lsuch anda pair'of arms, D, I y

The leg-frame is composed of four legs, o c o c, connected by rungs d, and capped by two bars, b b, the whole being as represented.

There extend upward from the front'part of the leg- Y frame B, 'two projections or front stops, ff, and there is also extended downward from the rear part of the Seatframe, two other such stops, g g. The purpose of these stops is to check the seat. in its motions, lso

as to prevent the springs from becoming over-strained. In tipping forward far enough, the'seat will` come down upon thev front stops, and, when tipped back" suficiently, the back stops will bring up against the leg-frame. l

When sitting on the seat of the said" chair, a person may rock or tip the seat backward; and lforward with greatiease. 1.

I herein make no claim tothe arrangement 'and combination of springs', the chair-seat, and base, as vl shown in the aforesaid patent No. 74,920; nordo claim achair, as having its seat supported byfsrde springs, arranged as shown in Thomas E. Warrens application for a patent led October 26, 1848; nor, as shown in J. Waites application, filed December.

20, 1867 unless with the springs,'as arranged at the sides, there are front and back stops,as set forth, the

springsare soon liable to be either overstrainedor broken.

What I claim as my present invention, and as a The rocking or tilting-chair, as described, as made with the front and back stops'- f q ,and with the two pairs ofserpentine springs, arranged at the opposite parts or sides of the seat and leg-frame, and with the springs of each pair disposed relatively to each other, as explained and represented.

' v JAMES LAMB.

Witnesses:

R. H. EDDY, J. It. SNOW.