US104207A - Improvement in the construction of cane-seat chairs - Google Patents

Description

iaited tate CHARLES M. RO-IFIILIOF PORTLAND, OREGON. l

Letters Patent No. 104,207, dated June 14, 18'70.

IMPROVEMENT lIN' THE CONSTRUCTION 01"' CANE-SEAT CHAIRS.

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

I, CHARLES M. Rona, of Portland, in the county of Multnomah, in the State of Oregon, have invented an Improved Gane-bottom Chair. of which the following is a specification.

Object of the I Mention.

Vmanner of preventing the breakage of the cane over the inside edge ofthe frame. A

The inventor knows that some chairs are beveled or chamfered ou thev upper inside corners, but the peculiar shape he makes them is not known or used. Such beveled chairs do not prevent the'breakage they l are designed to in any considerable degree, fcr it is found that they break on the edges of the chamfers almost as readily as on the plain corners, as the cane bends on one point constantly'. By the method theinveutor uses, a new point is brought to bear as the weight is shifted.

Every chair after alittle use is soon baggy and admits of the peculiar curve of the inventor, which he gives 'to the upper inside bearing of the chair-frame. 1f ,the bag is close to one edge by reason of the weight being concentrated at that point, then the rounder' part of the curve (lower) takes the weight, while, ou the opposite side, the Hatter part bears the weight, and so, no mattei' how the weight may be shifted, the roundest part of the frame is next -the lweight. If' the weight be next the middle, then it lis distributed about the frame equally.

. -In relation to the holes in which the caneis inserted, the inventor uses the following plan for making the frame free from any liability to split through the line of holes: y

He bores in in such a way that they form a zigzag on the bottom and a line on the top, looking as other chairs. This is donc in the following way:

The bit in the boring-machine inclines from the horizon about sixty degrees and the half of the holes are bored with the point of the bit pointing inwardly and half of them with the bit pointing outwardly; they then have the appearance shown in the section, on a line on the upper' part of the chair and zigzag on the under side. This arrangement of the holes is for this purpose.- When the cane is woven in the usual pattern it will go across the grain of the wood, .and, as it were, tie the wood together; even though the wood were split, the weight of the sitter would bindl the split together instead of tending to split it more.

The usual way of boring these holes in a uniform manner in straight lines or curves vertically through the wood is a source of considerable mischief in the way of this splitting, and this, with the breakage of the cane, soon renders these very pleasant chairs nnlit for use.

unserutiuizing eye similar to other chairs.

l Drawing. Figure 1 is a perspective viewofa chair-bottoni; A the front and B the back. l

Figure 2 is a section from'A to B, showing the angularly-pierced holes C D and C E; also shows the curve ci' the upper inside edges of the chair-frame, which is a attened double elliptic, the lower elliptic having the smaller radius; also, the curve C S.

Figure 3 shows the bottom or under side of the chair-frame or bottom and the zigzag appearance of the holes G D and C E. l v

Claim. A

That I'clairn as my improvement iu the construction ot chairs is The double elliptic curve O S and the angularlypierced holes C D and C E, arranged as hereln dcscribed for the purpose specied. CHARLES MQROHR.

Witnesses LIN ANDERSON, WM. A. DOBY.

The inventors chair wears well, and, in great measure, overcomes these diiculties, appearing to'an

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