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Folding Ground Seat With Adjustable Back Rest: Three Oak Frames, Duck Covers and a Notched Base (Boy Mechanic, 1919)
T. H. Linthicum's folding ground seat from The Boy Mechanic, Book 3 (1919): an 18 x 20 in duck seat and an 18 x 22 in duck back hinged to an open oak base frame, with a 19-1/2 in adjusting frame that drops into notches 2 in apart to set the back. It folds flat and also serves across a bed or trunk.
Intermediate
About 1 day
Instructions
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1
Frames in centimetres
Frames in centimetres
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Read The Boy Mechanic, Book 3
Read The Boy Mechanic, Book 3
"Those who enjoy sitting or lying upon the grass while reading will find the device shown in the illustration convenient and comfortable."
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3
Make the three frames
Make the three frames
From oak (or other common wood) make three rectangular frames with mortise-and-tenon joints, to his dimensions: the back 18 by 22 in, the seat 18 by 20 in and the base 18 by 20 in. Cut adjusting notches in the base sides 2 in apart.
Materials for this step:
White Oak Board3 pieces
Wood Glue1 pieceTools needed:
Hand Saw
Chisels
Wooden Mallet
Hand Plane
Tape Measure
Pencil4
4
Make the adjusting frame
Make the adjusting frame
Make the adjusting frame 19-1/2 in wide outside and 18 in inside, 11 in high, of 1-1/4 in stock, with the end details drawn 3/4, 1/4 and 3/8 in; its foot drops into the base notches.
Materials for this step:
White Oak Board1 pieceWood Glue1 pieceTools needed:
Hand SawChiselsHand Plane5
5
Cover the seat and back
Cover the seat and back
Cover the seat and back frames with heavy duck, turning it in 1/2 in at the edges (tacks are ours).
Materials for this step:
Canvas Fabric1 piece
Upholstery Tack Assortment1 pieceTools needed:
Scissors
Hammer6
6
Hinge and assemble
Hinge and assemble
Hinge the back and the seat to the base, and fasten the adjusting frame to the back with screws so it can fold; drop its foot into a base notch to set the back's angle.
Materials for this step:
Butt Hinge4 pieces
Wood Screws1 pieceTools needed:
Hand Drill
Screwdriver - Flat7
7
Using it
Using it
Ground seat use.
Flow
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8
History and honest limits
History and honest limits
From "A Folding Ground Seat with Back Rest" by T. H. Linthicum, in **The Boy Mechanic, Book 3**, Popular Mechanics, 1919 (Project Gutenberg 71856; checked on the archive.org scan boymechanic0003unse, p. 190). He gives the frame sizes in the drawing but not every rail section or the notch depth. The tools and metric figures are ours.
Materials
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Tools Required
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