The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 357
of a lock with one side removed, so as to show the interior ; and fig.2 a transverse section of the same ; a is the bolt of the lock, which is Fig. 2. … pressed outwards by a spring b, which presses against the end of thebolt; c is a lever or tumbler moving upon an axis c, d d is anotherlever moving upon an axis d, the lower end of this lever when thebolt is shot drops into a notch or recess formed in the bolt, the upperend supporting the end of…
Architecture · Civil engineering · Science
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