On the head of each spool we pasted a disk of white cardboard, the edge of
which was graduated, as in Fig. 190. Then we had a secret combination, say
11-19, which meant that when the spools were turned so that the number 11
on the door spool came in line with the number 19 on the frame spool the
tooth and notch would be in line, and the door could then be opened. Of
course, this combination was known to the members of the club only, and
anyone outside who tried to open the door might have tried for some time
without bringing the tooth and notch into line with each other.
Occasionally we changed the combination by loosening the screws which held
the washers, and turning them so that the notch and tooth came opposite
different numbers on the dials. This was done so that if anyone should
chance to learn our combination he could not make use of it very long.
[Illustration: Fig. 188. The Notched Washers.]
[Illustration: Fig. 189. Washers Fastened on Spools.]
[Illustration: Fig. 190. The Combination Lock.]
CHAPTER XVI.
SCOOTERS.
"Hello, Dutchy! What in thunder have you got there?" It was Bill who
spoke. We were on our way home for the winter holidays, and had been held
up at Millville by Reddy Schreiner, who had informed us that Dutchy was
down by the river with the boat to give us a sail up to Lamington.
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