The%20Shield%20plans.pdf

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Page 1

Homemade Puzzles

The Shield plans

A rather plain, metallic looking box, with an embossed shield

on the top, without any visible moving parts. Yet this is another

‘sliding panel’ puzzle box. The shield itself has to be manipulated

in order to get the lid off. The only moving parts are in the lid.

This is quite a precise little puzzle to make, and there are only

9 moves to get the lid off. However, it’s quite tricky to get off,

because the shield seems to jam up now and again. That’s because

the shield is in three parts, and the inside layers are interlocked.

The box measures 3” x 3” x 4”: the lid is made of 1/8” plywood:

the box made of 3/16” ply, with bevelled corners.

Cut all these pieces from 1/8" ply.

1-3/4"

The easiest way to cut these pieces, is to cut around these shapes

roughly with scissors, glue them to the plywood, and cut them to

the lines.

1/2"

back lid spacer

These are full size drawings

1-1/2"

5/8"

middle lid spacer

2-1/8"

back locking piece

11/16"

1-1/4"

front lid spacer

1/2"

2-1/8"

1-7/8"

middle locking piece

1-3/8"

9/16"

back rail spacer

1-5/8"

2-1/8"

middle rail spacer

1-1/8"

13/16"

front locking piece

1-7/8"

9/16"

front rail spacer

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Page 2

Cut all these pieces from 1/8" ply.

The easiest way to cut these pieces, is to cut around these shapes

roughly with scissors, glue them to the plywood, and cut them to

the lines.

These are full size drawings

2"

3/4"

back shield cover

1"

back shield

2-1/4"

2-1/4"

1-1/4"

middle shield cover

middle shield

1"

1-5/8"

2"

front shield cover

3/4"

front shield

1"

outer shield covers

When the shield cover parts are cut,

round off all the top edges.

When the shield parts are cut,

round off the top of the red edges.

4"

C

Cut a piece at 1-7/8" x 3-3/8":

this will be the lid cover.

Also cut 2 pieces at 1-7/8" x 1/4":

lid cover supports.

You could make four pieces

at 1/8" thick, and glue two sets

of two together to make 2 pieces

1/4" thick.

the lid

C

C

3"

C

After the lid is cut, round off all the outer edges.

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Page 3

The box

Cut four pieces at 1/8" x 1/8" x 1-1/4".

These are the short guide rails for the

end locking pieces.

The box can be made from any thickness wood you prefer,

and the corner joints can be bevelled or straight, but the

inside dimensions MUST be 2-3/8" wide by 3-3/8" long.

The height should be 2-3/8", but is not critical.

I used 3/16" plywood, and bevelled the corner joints.

The rails are glued to the inside faces of the long

sides, flush with the top edges.

Glue the short guide rails just under the rails, at both

ends and both sides.

short guide rails for

end locking pieces

3"

inside view of

both ends

2-3/8"

short guide rails for

end locking piece

(under the rails)

2-3/8"

Position of rails: flush with top edges

of long sides.

Position of short guide rails: directly under

the rails, at both sides and both ends.

the rails

4"

base

from 1/8" or 3/16"

short guide rails for

end locking piece

(under the rails)

The rails: cut from 1/8" plywood

1/8"

the box

top view

13/16"

1/2"

1/2"

3-3/8"

2-3/8"

inside view of both sides

3/4"

3-3/8"

13/16"

DO NOT GLUE THE BASE ON AT THIS TIME.

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Page 4

Assembly of the lid parts.

back shield

Position the shield parts centrally on the lid.

Hold them in place temporarily with tape.

middle shield

front shield

back lid spacer

Turn the lid over, making sure the shield

parts haven't moved.

Glue the lid spacers to the shields in these

positions.

middle lid spacer

front lid spacer

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Page 5

Assembly of the lid parts.

cover support piece

Turn the box over, so the rails are facing down.

Place the box centrally on the lid.

Glue the cover supports onto the underside

of the lid, at each end.

back rail spacer

The rail spacers pieces are positioned at the same

level as the box rails, and glued to the lid spacers.

middle rail spacer

front rail spacer

cover support piece

back locking piece

The locking pieces are positioned under the

rail pieces, at the same level as the short guide

rails, and glued to the rail spacers.

In this view, the locking pieces will be

on top of the rails.

middle locking piece

front locking piece

These views show the box LOCKED,

looking up from the bottom of the box.

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