The object of this book is to impart a
knowledge of Pattern Making that shall be useful to
apprentice Pattern Makers, and also to practical machinists,
because the drawings of the designer do not as a rule give
any instructions as to
the construction of the patterns, while at the same time
that construction may affect to a considerable degree, the
manipulations of the machinist.
Furthermore, it often occurs in the
experience of a general machinist, that he is required to
make a pattern either in iron or wood, and the complete
isolation which usually exists between the pattern shop and
the machine shop, is an effective bar to the acquisition of
knowledge by observation.
The information is given from actual pattern
shop practice, and in the ordinary workshop parlance.
The tables have been selected with a view to
a collection comprising all that the Pattern Maker of the
widest experience requires; arranged for his convenience,
although in as compact a
form as possible.
Those savants who have read our old earth's
unwritten history in and from its strata, tell us that, in
ages far remote, men made tools and contrivances of bronze,
which, being an alloy, necessitated the fusion and casting
of the metal.
This casting involves the use of patterns, and
pattern making may therefore lay claim to the highest
But the modern idea of the division of labor has exalted it
to be a distinctive art; in the last generation, for
instance, a good machinist (or rather engineer or
millwright, for those terms were then applied to builders of
machinery,) was required to be alike expert in working upon
both wood and metal.
He constructed his framing of wood, and made
the patterns for his cast metal work; he was to-day a lathe
hand, tomorrow a vise hand.
As, however, the present age of iron dawned,
it became apparent that working in wood and in metal must be
separated, not only because the handiwork could be more
cheaply produced by reason of the increased skill arising
from continuous practice, but also because the amount of
knowledge required to make an artisan skillful in either the
manufacture of wood or of iron, was too great to be
thoroughly mastered in the working lifetime of an ordinary,
or even an unusually expert workman.