Occasional chair

A collapsible chair made primarily of canvas and hardwood made up of two sides each having an arm, a front and a back leg, and a bottom connecting member between the front and the back legs. Canvas seat and back are mounted in grooves in each of the two sides with stretcher means to enable assembly of the sides, seat and back means to be a very comfortable occasional chair. In assembly, the back stretcher means must be inserted before the stretchers for the front and the bottom connecting member. In disassembly, the front and bottom stretchers must be knocked out before the back stretcher can be removed after moving the front legs towards each other.

RELATED PATENT APPLICATION 
A design patent application Ser. No. 104,663 filed Dec. 17, 1979, for 
OCCASIONAL CHAIR by Velma Ann McCollum Yount is copending. 
BACKGROUND OF THE INVENTION 
This invention is directed to an improved occasional chair, and more 
specifically, to a chair which is collapsible and can be stored in a 
minimum space. Former collapsible chairs were constructed of pivoted 
elements that were twisted askew in order to be collapsed after the 
removal of a stretcher means as shown in U.S. Pat. No. 517,656 issued Apr. 
3, 1894 to Samuel B. McCullough; constructed with mortice joints as in 
U.S. Pat. No. 2,427,832 issued Sept. 23, 1947 to Bela Berger; provided 
with folding stretcher means as in U.S. Pat. No. 3,228,724 issued Jan. 11, 
1966 to Herbert R. Resar; constructed of joined tubing means as in U.S. 
Pat. No. 3,695,702 issued Oct. 3, 1972 to Joseph F. Ingellis; and 
constructed of tubing and rod stretcher means as in U.S. Pat. No. 
4,049,314 issued Sept. 20, 1977 to Andrew W. McGaffin. Lacking was a 
comfortable collapsible chair of tasteful design which would conform to 
the variations of the human characteristics of the users, be fully 
portable, be capable of being stored in a small area, be exceptionally 
strong, and be relatively easily manufactured. 
An object of this invention is to provide a collapsible chair that is 
comfortable, easily assembled, adaptable to all body shapes including 
human deformities, fully portable, stored in a small area, exceptionally 
strong, and is fully functional while being decoratively attractive. 
Another object is to provide a collapsible chair that is devoid of stress 
points that, in previous chairs, caused blood circulation problems in some 
users. 
Still another object of this invention is to provide a configuration of 
parts for minimum crating wherein the shipping box is of minimal 
dimensions. 
A still further object of this invention is to provide an occasional chair 
with no metal therein whereby rust, corrosion and other upkeep problems 
would be eliminated. 
Another object is to provide a collapsible chair that lends itself readily 
to mass production techniques since most of the wooden pieces are of the 
same dimensions, and since pairs of near identical parts are utilized. 
SUMMARY OF THE INVENTION 
The chair of this invention is constructed of: side members which included 
the arms and legs, seat support rails, and a pair of brace members all in 
hardwood; back and seat means of sheet material; and three stretcher means 
to secure the assembly in an operative manner. The stretcher means 
extended between the side members at strategic locations to maintain the 
assembled condition of the chair. Removal of the stretcher means provides 
for the collapsible capability of the chair.

DETAILED DESCRIPTION OF THE INVENTION 
Chair 10 has as two of its unified parts left side brace 11 and right side 
brace 12, which are mirror reflections of each other. Left side brace 11 
is made up of left arm 13, left front leg 14, left back leg 15, left seat 
rail 16, left back rail 17, and left leg brace 16 secured to the bottoms 
of legs 14 and 15. The right side brace 12 is made up of right arm 21, 
right front leg 22, right back leg 23, right seat rail 24, right back rail 
25 and right leg brace 26 secured to the bottoms of legs 22 and 23. 
The chair further has a fabric seat 27 and a fabric back 28. Seat 27 is 
secured to the seat rails 16 and 24 at opposite ends there of with dowel 
means, such as shown by dowel 29 as shown in right seal rail 24 in FIG. 1. 
To complete the structure of the chair, three stretcher rails are provided; 
namely, front stretcher rail 31, bottom stretcher 32 and back stretcher 
rail 33. 
In the completely assembled chair as shown in FIG. 1, the right and left 
side braces 12 and 11, respectively, support the flexible fabric seat and 
back, 27 and 28, respectively, while the three stretchers 31, 32, and 33 
provide the rigidity which opposes the inward forces produced by a person 
sitting on the seat 27. Dowel means in each of the ends of the three 
stretchers 31, 32, and 33, such as dowels 34 and 35, shown in bottom 
stretcher 32 in FIG. 1, provide compensation for the torque forces in the 
chair structure to eliminate the effects thereof. 
FIG. 2 is a front view of the assembled chair wherein stretchers 31 and 32 
are shown to be supportive of the front legs and to maintain the proper 
separation of the bottom leg braces. Also, it is to be noticed that the 
leg 22 is joined to arm 21, seat rail 24 and leg brace rail 26 in mortice 
and tenon junctions. The same mode of connection is utilized for the 
junctions of leg 14 with arm 13, seat rail 6 and brace rail 18. Seat 27 
and back 28 are shown in their stretched, assembled condition. 
FIG. 3 shows a side view of the chair with one end of stretcher 33 being 
positioned on the seat rail 24 in the space between seat back rail 25 and 
leg 23. The notched stretchers are shown with the protruding part thereof 
in place on the back of the leg 22 and on top of the leg brace rail 26. It 
is to be noted that the angles formed by seat 24 and the back 25 and the 
side braces provide maximum comfort. It has been determined by others that 
the greatest comfort derived from the sitting position is derived by 
having the knees slightly higher than the hips. For this reason, the angle 
formed by the seat 24 and the leg 23 and the angle formed by the back 25 
and the leg 23 was chosen. This angle combination causes the body to lean 
back slightly with the knees slightly elevated with respect to the hips in 
a natural, relaxed position. 
Since the fabric is the only material in contact with the chair user, there 
are no stress points to interfere with blood circulation. No part of the 
wood structure is in contact with the human body except the arm rests. 
FIG. 4 is a back view showing the added structure 46 to stretcher 33 to 
assure sufficient strength to the chair where the greatest stresses exist. 
FIG. 5 is a bottom view of the chair showing the relationship of the three 
stretchers to the side braces. 
FIG. 6 is an exploded view showing the tenon and mortice junctions utilized 
at the joining of leg 23, seat rail 24, back rail 25 with stretcher 33 
entered therebetween. Mortice 36 in leg 23 receives tenon 37 in seat rail 
24. Mortice 38 in seat rail 24 receives tenon 39 in back rail 25. 
Extension 41 of back stretcher 33 rests on surface 42 on top of seat rail 
24. Abutment 43 rests against the inner side of seat rail 24. 
It is to be noted that back stretcher rail 33 as shown in FIGS. 4 and 6 has 
no dowels in the ends thereof but does include an additional brace member 
46 secured to the back surface thereof and extending upwardly therefrom. 
Brace member 46 is secured to back stretcher rail 33 by adhesive means or 
any other appropriate securing means. 
FIG. 7 shows a leg brace 26 with a hole 44 to receive dowel 35 which is in 
the notched end of stretcher 32. Surface 45, which is the end resulting 
from the notching of stretcher 32 for the extension thereof, abuts the 
inner side of leg brace 26. Dowel 35 fits snugly into hole 44 and surface 
45 fits snugly against leg brace 26. Both ends of stretcher 32 and front 
stretcher rail 31 are provided with dowels as shown in FIG. 7. 
FIG. 8 illustrates how the seat and back fabrics are secured to the seat 
and back rails, respectively. A groove 47 in seat rail 24 receives the 
seat fabric wrapped around a dowel 29. The dovetail shaped groove 47 
provides gripping action for a coarse fabric, such as canvas, denim, 
leather, or the like, around the dowel sufficiently to retain the fabric 
in the groove without need for hemming the fabric to provide a loop for 
the dowel to be inserted thereinto. The other end of the fabric is 
likewise secured to the seat rail 16. The fabric for the back of the 
chair, however, must be hemmed or otherwise provide a loop structure to 
secure the fabric around the dowel 48 since the securing forces thereupon 
are not adequate to retain the fabric within the dovetail shaped groove 49 
in back rail 25. The other end of the fabric is likewise secured to the 
back rail 17. Obviously, smooth fabrics such as velour or the like would 
require hemmed loops for securing purposes. 
Since assembly of the chair is accomplished by separating the two side 
members, with the seat and back fabrics installed, and placing the three 
stretcher members in place, disassembly is accomplished by reversing the 
procedure. The front and bottom stretchers are knocked out by blows by the 
palm of the hand, the front legs are drawn towards each other to form a 
triangular shape which spreads the back legs so that, upon rotating the 
back stretcher 33 ninety degrees enables one end thereof to clear its 
nearby leg, and then complete removal of the back stretcher is 
accomplished by sliding it from in front of the other of said two back 
legs. The two side members are then moved towards each other, the seat and 
back are folded and the two side members are moved together. The three 
stretchers are then placed such that the two identical ones are placed on 
the extension 46 next to the basic stretcher 33 to form a box-like 
configuration. This can be carried separately from the chair or can be 
stored in the space provided between the legs and the leg base rails 18 
and 26. The container for the complete chair need only be large enough for 
the end frame members and only as thick as the two said end frame members. 
Minimal storage space is required. 
The choices of material are limited only by the requirements of sufficient 
strength, proper rigidity for the solid parts and esthetics of the user. 
The wood can be oak, walnut, birch, ash or the like. The fabric can be 
canvas, denim, leather, or the like. 
It should be understood that the invention is not limited to the exact 
details of construction shown and described herein for obvious 
modifications will occur to persons skilled in the art.