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30 'l'HROOP POLYTECHNIC INSTITUTE
Processes. The processes involved in the year's work arc:
drawing, bending, upsetting, different kinds of welding, punching,
drilling, fullering, swaging, cutting cold, chipping, cutting hot,
splitting, twisting, filing, brazing, hardening, tempering, and ornamental
iron work.
Tempering. Hardening in water and oil, tempering or drawing,
temperatures and colors used, and processes in tempering tools for
wood and iron work.
Ji :
TYPICAL EXEIlC[SES IN FORGING
Ornamental iron work. Simple pieces of ornamental iron work
are brought into the . course during the year, preparatory to the more
elaborate piece made at the close of the year.
!Pattern"LJr.\aking ant> LJr.\acbine"Sbop !practice
1. (a) Pattern -making. This course comprises a series· of
exercises embodying the principles governing pattern construction,
with lectures and illustration of molding- and other foundry practice
having direct bearing upon pattern work.
The allowances for draft, shrinkage and casting finish are kept
prominently before the student throughout the course, and with each
succeeding model additional principles are brought out, comprising
split patterns, simple and complex core-work, rib-work, segmentwork,
fil leting, etc. Patterns ,may be actually tested in the molding
sand, as the pattern-shop has, as an adjunct, properly furnished
molding benches and brass furnace. Some work in molding is
required of every student.
Preparation required, wood work and plane geometry.
(b) Machine-shop practice. In bench and vise work the student
takes up chipping, filing, scraping, polishing, laying out of
work, etc.
As a preparation for work on the machines, a careful investigation
of each machine is required, to familiarize the student with its
construction and various motions, the office of every bolt, nut, handle,
gear wheel, etc., being determined, and the general design compared
with other machin.es. The care of machines is considered at