Year: 1897

page_text: Date of Application, 18th May, 1897-Accepted, 10th July, 1897
444
I, CLARENCE ALONZO BURNS, Engineer, of 1111 Bowling Green Offices, Broadway,
New York, United States of America, do hereby declare the nature of my invention,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
The object of my invention is to provide a simple, economical and efficient gyrating
shaft; and the invention consists in the features, combinations and details of
construction hereinafter described and claimed.
In the accompanying drawing, the figure is an elevation, partly in section, of a
gyrating shaft with my improvements attached thereto.
In the art to which this invention relates, it is well known that the gyrating shaft
and bearing or journal portions are made in one piece, so that when the bearing
portion-particularly the cone bearing portion-wears, the shaft has to be thrown
away. It is further well known that the "spider" portion has also to be thrown away
when either the conical bearing for the shaft is worn off or irregular, or the bearing
portion of the shaft has become worn or irregular. To remove these objections and
provide a gyrating shaft with a removable bearing portion that also acts to hold the
crushing head in position is the principal object of my invention.
In constructing a gyrating shaft in accordance with my improvements, I make a
shaft portion A of the desired size and shape, and provide it with the usual lower
portion a, by which it is gyrated. Near the upper portion of the shaft is the
portion a that is tapered and grooved longitudinally-as at a²-to receive the
crushing head B. The crushing head is also tapered and grooved longitudinally-as
at b-so that it may be moved around until its grooves register with the grooves in
the crushing shaft, when soft metal keys are inserted to prevent any lateral
disturbance in the position of the parts.
In order to hold the crushing head in place, I prefer to turn the upper portion of
the shaft at A¹ down to the desired diameter, which is slightly smaller than the
diameter of the lower portion of the recesses or longitudinal grooves. I then provide
a metal bearing portion C of the desired size and tapered at its upper portion, and
which is bored out to fit the upper portion of the shaft. The lower portion of this
bearing portion is provided with a flanged shoulder c that contacts the boss or hub b¹
on the crushing head when the bearing is in position, forcing the head downwardly
into a close engagement with the gyrating shaft.
To hold the parts in such relation during the operation of the machine, I provide a
cap portion D and a screw stud d and lock nut d¹. By turning the lock nut the
desired amount, the bearing portion C is firmly pressed down to the crushing head,
while a reverse movement of the nut serves to allow the cap to be taken off from the
bearing, the bearing to be removed-if necessary-repaired or replaced. While I
have shown the removable bearing portion as made in one integral portion, it can be
made in two that is, the lower portion can be made in one piece, or the parts
separated at the line c², so that when it is necessary to replace the bearing, only the
upper portion need be removed.

page_text: The principal advantages of my improvement are, that when the bearing portion
has become worn or irregular, it can be removed and a new one inserted in its place;
or,
if the journal bearing of the spider becomes worn or irregular, it may be rebored,
and a larger journal or bearing portion furnished for the shaft, so that instead of
throwing away two parts-as is the case in present practice-it is only necessary to
throw away the old or worn bearing or journal portion. Again the mechanism
provides a very economical method of holding the head and shaft in operative
engagement.
In illustrating and describing my improvement, I have only thought it necessary
to illustrate and describe that which is new in connection with so much of the
mechanism as is old, in order to disclose my invention and enable those skilled in the
art to practice the same, leaving out of consideration all such parts of the mechanism
and machine as are well known and understood in the art, and which, if described or
illustrated, would only tend to confuse or render ambiguous the invention.
Having now particularly described and ascertained the nature of my said
invention, I declare that what I claim is :-
1. In a machine of the class described, the combination of a gyrating shaft, a
crushing head thereon, and a removable upper bearing portion arranged to hold the
crushing head in position, substantially as described.
2. In a machine of the class described, the combination of a gyrating shaft
provided with a tapered portion having longitudinal grooves or slots, a crushing head
thereon provided with longitudinal grooves or slots registering with the grooves or
slots in the shaft, soft metal keys in the grooves or slots, a removable bearing or
journal portion on the shaft arranged to contact the head portion adjacent to the
grooves or slots and hold the head and shaft in operative engagement, a cap portion
on the outer end of the removable journal bearing, and bolt mechanism for locking
and holding the parts in operative position, substantially as described.
Dated this 18th day of May 1897
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant.