A copper crusher gauge holder for testing internal pressures of
cartridges during test firing is provided. The copper crusher gauge
holder has a circular aluminum upper plate and a circular aluminum
lower plate having a layer of urethane rubber approximately 3/4
inch thick sandwiched between the plates. The gauge holder is bored
to hold copper crusher gauges and center-bored to fit over a cartridge
centerline primer tube. A series of machine screws hold the plates
together and allow for tightening the screws once the copper crusher
gauge holder is in place in a cartridge to be tested. As the machine
screws are tightened, the urethane rubber expands laterally gripping
the inside of the cartridge and gripping the copper crusher gauges.
A method to manufacture the gauge holder is provided.
A system for mounting material directing impellers to the table
of a centrifugal impact crusher includes an upstanding mounting
plate having a slot extending through it which opens out of its
top surface. An impeller has a rearwardly facing stob extending
from it which slidably fits within the slot. A nub, which does not
fit through the slot, is attached to the extremity of the stob and
the stob is sized such that the nub and the rear surface of the
impeller interact with the mounting plate to prevent the impeller
from moving relative to the mounting plate in either circumferential
direction. The sides of the slot are angled radially outwardly as
they extend downwardly toward the table.
A device for securing the stationary jaw to the frame of a jaw
crusher is disclosed. The device includes a crusher frame having
top and bottom spaced apart cross members, a stationary jaw, and
a threaded draw rod having a pair of inwardly moveable wedge members.
The stationary jaw includes a top edge, a bottom edge, and a pair
of interconnecting sides, and further includes a top lug adjacent
the top edge and a bottom lug adjacent the bottom edge. The top
lug is adapted for placement adjacent the frame top cross member,
and the bottom lug is adapted for placement adjacent the frame bottom
cross member. The draw rod is disposed such that the wedge members
are positioned to engage the jaw top lug and the frame top cross
member. Accordingly, in response to inward movement of the wedge
members, the stationary jaw is progressively more firmly secured
to the frame, thereby preventing undesired movement of the stationary
jaw during operation of the crusher.
An improved vertical shaft impact crusher, and in particular a
crusher having a shoe assembly attached to a rotatable table assembly,
the shoe assembly comprising a bracket, a shoe, and mounting bolts
for removably attaching the shoe to the bracket. The shoe has a
contact surface which engages a support surface of the bracket to
reduce shear forces in the mounting bolts during rotation of the
table assembly. The crusher also has a liner for protecting an outside
face of the bracket. The liner has spacers located on a mounting
surface which create a gap between the liner and the bracket, thereby
reducing a prying action caused by uneven deflections in the mounting
bracket during rotation of the table assembly.