Improvements in Stamps for Crushing Mineral Ores or other Substances.
Year: 1894

page_text: Date of Application, 21st Sept., 1894
Complete Specification Left, 14th June, 1895-Accepted, 24th Aug.,
1895
PROVISIONAL SPECIFICATION.
Improvements in Stamps for Crushing Mineral Ores or other
Substances.
I, CHARLES ARTHUR ALLISON, of 52 Chancery Lane, London, in the County
of Middlesex, Patent Agent, do hereby declare the nature of this invention
(which has been communicated to me from abroad by Thomas Pilkington, of
Vallejo, in the County of Solano, State of California, United States of America,
Gentleman), to be as follows:-
This invention relates to what are called stamps for crushing mineral ores or
other substances, and to an improved method of sustaining and guiding the stems
of such stamps by means of adjustable bearings fitting around the stems, so made as
to not be deranged by shock or jar, and convenient to set or remove.
The invention consists of a flanged rectangular box or frame, open at one side,
arranged to receive a bearing in two halves or paris, preferably of hard wood.
On the sides of the rectangular retaining box or frame are ledges that fit into
corresponding channels or grooves formed in the sides of the bearings, so the latter
cannot move end wise, or up and down, in their seat.
On the lips or edges of the rectangular box or frame, outside of the bearings,
are internal ledges set diagonal to the axis of the stamp stem, and to the front
side of the bearings, so as to receive a follower or wedge that bears against the
outer half of the bearing, and holds both halves firmly in a lateral direction.
This follower or wedge tapers downward, and tends to descend and close the
bearing if loosened by jar. On the outer face of this wedge are lugs to receive an
eye bolt, which passes through a bridge piece spanning the lower end of the main
box or frame, so that by loosening the nut on this bolt it can be instantly
swung outward, and the wedge or follower, and also the front half of the bearing,
lifted out.
Dated this 21st day of Sontember 1894
ALLISON BROS.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Stamps for Crushing Mineral Ores or other
Substances.
I, CHARLES ARTHUR ALLISON, of 52 Chancery Lane, London, in the County
of Middlesex, Patent Agent, do hereby declare the nature of this invention
(which has been communicated to me from abroad by Thomas Pilkington, of
Vallejo, in the County of Solano, State of California, United States of America,
Gentleman,) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to stamp batteries for crushing ores or other mineral.
substances, and to the supports for guiding and sustaining the stems to which the
stamp heads are attached, and consists in a separable bearing, preferably of wood.
supported in a box or frame of metal, and held by means of a follower wedge and.
D21

page_text: screw, so arranged that the parts are easily separable, and cannot be disarranged
or disconnected by the jar and concussion of the falling stamps.
The method of constructing these improved guides or bearings for stamp stems
is shown in the accompanying drawings, in which
Fig. 1 is an elevation in perspective of a complete guide made according to this
invention.
Fig. 2 is a longitudinal section on the line a, a, of Fig. 1.
Fig. 3 is a transverse section on the line y, y, of Fig. 2.
Similar letters of reference are employed to designate like parts throughout
the different figures.
The main member A is made of metal with flanges B, B, and boltways C to be
fastened to a crossbeam of the stamp frame in the usual manner.
The bearing or guide shells E¹, E³, are preferably made of wood, in two parts
as shown, and wide enough to fit between the sides or flanges D, D, of the main
member A.
On the outer edge of these flanges D are inverted ledges F, F, oblique on their
inner faces to receive a tapering follower or wedge G, which bears against the
ledges F and the outer half E2 of the guide shells, as shown in the different figures
of the drawing.
This follower or wedge G is forced in and held in place by an eyebolt H
attached to the lugs J, J, by a pin I, and passes through a bridge or arch
piece L, that has its bearings on the side of the main box or frame A, as seen in
Fig. 1.
This bridge piece or arch L is made after the manner of common fastenings of
the kind such as are employed to hold hand-hole or other plates in steam boilers, and
swings with the screw-bolt H outward and clear of the side plates D, D, when
the nut N is loosened, or any other suitable equivalent means may be employed
for forcing in and retaining the wedge.
Below this bridge I preferably place an elastic collar M, so as to neutralize the
concussion of the stamps and consequent loosening of the nut N, also outside this
nut and through the end of bolt H, I insert a cross pin O, to guard against the
nut falling off in case it is loosened by the jar of the falling stamps.
To bold the bearing shells E', E³, longitudinally, I form rectangular ledges P, P,
on the inside of the Hanges D, D, extending wholly across the rear half shell E',
and partially across the front shell E2, fitting into corresponding grooves formed in
the sides of these shells.
When the follower G is removed, the outer shell E2 can be drawn forward until
it passes or clears the ends of the ledges P, P, at R, R, and then can be removed
endwise from the main body A. The rear shell can also be removed in the same
manner by moving the stamp stem forward, so these shells or bearings E³, E², can
be removed, or replaced in a few minutes' time without interfering with or
disturbing the main parts of the device.
The jar and concussion to which the guides or bearings of stamp stems are
subjected, requires that no part shall be liable to give way or come loose, also that
the bearing shells, which wear rapidly, should be quickly adjusted or replaced, and
it is to the attainment of these objects the invention is directed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a stamp stem guide, a main supporting plate having flanges normal thereto,
embracing and extending beyond the bearing shells, and provided with inverted
ledges to receive a retaining follower or wedge, in the manner substantially and for
the purpose specified and shown.
2. In a stamp stem guide, a main plate adapted for attachment to the stamp
frame and provided with side flanges, between which the bearing shells are fitted;
inverted ledges and a follower or wedge, as herein described, bearing whole length

page_text: of the shells, and operated by a screw-bolt, or other suitable means of forcing in
and retaining the wedge, in the manner substantially as described.
3. In a stamp stem guide, a main fastening plate with side plates or flanges as
shown; a retaining follower or wedge to press the bearing shells against the main
plate, in the manner shown; ledges on the side flanges fitting into corresponding
grooves across the bearing shells to prevent end movement of the latter when in
place, in the manner substantially as described.
4. In a stamp stem guide, a rectangular three-sided box consisting of a base or
main supporting plate and side flanges, between which the bearing shells are fitted;
a tapering follower or wedge, and inverted ledges on the side plates against which
the wedge bears; a screw-bolt to force in and retain the follower or wedge, and a
removable bridge piece through which the screw-bolt passes that will swing out of
the way and permit the removal of the follower or wedge without removing the
screw-nut, in the manner substantially as described.
5. In a stamp stem guide, the combination of a main enclosing body or frame
with flanges and boltways for attachment to the stamp framing, bearing shells
fitted therein, and held longitudinally by ledges, and a cross groove in the sides of
the shell as shown; a follower or wedge fitting against oblique ledges on the sides
of the main body; a bolt and loose bridge piece, as shown, to force in and hold the
follower, the bolt hinged so the bridge piece will swing clear of the sides when the
screw is loosened, in the manner substantially as described.
Dated this 12th day of June 1895.
ALLISON BROS.,
Agents for the Applicant.