In order to prevent vibrations in the trip
hammer when it is lifted, and increase the number of blows, there is
established a spring beam, which is formed of unsquared timber, which
is firmly fastened at one of its extremities, and which receives at the
other end the shock of the hammer head when the latter reaches the end
of its upward travel.
_Reheating Furnace_.--This is a double fire furnace, like those used in
our smithies, except that the wind, instead of being forced into it by
means of a bellows, is supplied by a tromp which receives water from the
same channel as the wheel. The two furnace tuyeres are arranged exactly
like those of the cadinhes, upon a wooden conduit which starts from the
wind chamber (Fig. 5). This furnace serves to prevent the cooling of
such blooms as are awaiting their turn to be shingled, and of such bars
of finished iron as are being made into tools.
OPERATION OF THE SYSTEM.
A forge like the one whose plan we give, may be run with 1 workman at
the cadinhes, 1 assistant, 1 workman at the hammer; total, 3 men.
Pages:
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109