Improvements in Stamp-stem Guides for Stamp-mills, and in Devices for Securing them in Place.
Year: 1895

page_text: Date of Application, 2nd Aug., 1895
Complete Specification Left, 10th Sept., 1895-Accepted, 19th Oct., 1895
Improvements in Stamp-stem Guides for Stamp-mills, and in Devices
for Securing them in Place.
We CORYDON ALONZO FARGO and PATRICK JAMES HARRIGAN of Marysville
in the County of Lewis and Clark, State of Montana, in the United States of
America, Gentlemen, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements made in the guides for the stamp-stems
of ore stamp-mills, and in means or devices for securing. them in place; and the
invention has for its object to obtain several advantages over previous constructions
of stamp-stem guides and fastenings, and principally to facilitate the fitting and
adjusting of the guides as they become worn; to prevent them from being
loosened and displaced under the constant vibrations to which such guides are
exposed in the working of the stamps, and, generally, to increase: the life of such
rapidly wearing portions of the stamp-mill and to reduce the cost of construction
and repairs.
To such ends and object our invention consists in the described construction and
combination of stamp-stem guides and fastening means comprising essentially an
adjustable stamp-stem guide made in two parts and means to secure them on the
frame against perpendicular movements and fastening devices of novel construction
to clamp them securely in place around the stamp-stem-and to tighten the guide
as the parts become worn.
The stamp-stem guide is divided vertically into two parts through the socket in
which the stem plays, so that the two parts are readily removed from the stem
and as readily inserted and placed in position around it.
The inner meeting-faces of the said two parts are finished flat, and the outer
sides are tapered from the back towards the front, while the front and back faces
are parallel with the perpendicular plane of the stamp-stem.
The back face of such guide is mortised or cut away to let in a horizontal bar
of metal which is fixed across the front faces of the horizontal timber of the
stationary frame of the stamp-mill, and such back face of the guide is set up
closely against the timber.
The aforesaid bar extends across such timber for the entire length, and is let
into the backs of all the guides.
'
:
A wedge with tapered vertical sides is inserted between one guide and the next,
and a screw-threaded rod inserted through the horizontal timber of the frame from
the back and through the wedge is fitted with a nut on the projecting front end,
and the said nut being screwed down against the front face of the wedge forms the
means of forcing the wedge into place and holding it in position.
A metal plate secured horizontally across the front face of the wedge extends
beyond the sides of the wedge in wings or projecting side-portions that over-lap
the front face of the parts of the guides on each side of the wedge, and wedge-
shaped or tapering keys inserted from above are driven down between the aforesaid
wings and the front faces of the guides behind such wings.
Horizontal ribs or projections on the vertical tapering sides of the wedges are
fitted into mortises or grooves formed in the sides of the guides to receive them.
The head of every screw-threaded rod is set into the timber of the frame herein-
before mentioned and a plate is fastened over the recess in the. timber to keep the

page_text: rod from being pressed back while the wedge is being placed in position on
the rod.
In some cases a metal strap having rearwardly-bent arms with screw-threaded
ends is placed around the two-part guide, and the aforesaid arms being inserted
through holes, in the horizontal timber of the frame the nuts are screwed down on
the ends of said arms and the said strap is drawn tightly around the guide. These
straps may be used to advantage, as an adjunct to the keys and wedges, particularly
in mills of large or heavy construction, in which case the aforesaid straps serve to
increase the stiffness and stability of the guides and counteract the effects of the
jar and vibration of the stamp-stems upon the guides.
A washer-plate is placed beneath the nuts on the screw-threaded ends of the
aforesaid straps, and a locking device is applied between every two adjacent nuts
to prevent the nuts from working loose. Such locking device, consists of a slotted
plate fixed to the back of the timber in line with the space between the two nuts
by means of a screw passing through such slot, and the end of such slotted plate
is cut tapering or wedge-shape, so that it can be pressed in between and crowded
against the adjacent faces of the two nuts, in which position it is fixed by setting
the holding screw firmly into the timber to clamp the slotted plate. Such lock
will not be loosened or disturbed by the vibrations of the frame.
Dated thin
185
HASELTINE; LAKE & Co.,
G45 Southampton Buildings, London, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
"S
Improvements in Stamp-stem Guides for, Stamp-mills, and in Devices
[for Securing them in Place.
We CORYDON ALONZO FARGO and PATRICK JAMES HARRIGAN both of
Marysville in the County of Lewis and Clark, State of Montana, United States
of America, Gentlemen, do hereby declare the nature of this invention 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 improvements made in the guides for the stamp-stems of
ore-stamp-mills, and in means ardevices for securing them in place; and the invention
has for, its object to obtain bevdral advantages over previous constructions of stamp
stem guides and fastenings,and principally to facilitate the fitting and adjusting of
the guides as they become worn; to prevent them from being loosened and displaced
under the constant vibrations to which such guides are exposed in the working of
the stamps; and, generally, to increase the life of such rapidly-wearing portions of
the stamp-milk and to reduce the cost of construction and repairs.
'
To such enda and object our invention consists in the described construction and
combination of stamp-stem guides and fastening means comprising essentially an
adjustable stamp-stem guide made in two parts and means to secure them on the
frame against perpendicular movements and fastening devices of novel construction
to clamp them securely in placeraround the stamp-stem and to tighten the guide as
the parts become worn, all as hereinafter more particularly described and explained".
in the following description in which reference is had to the accompanying drawing
that forms a part of this:Specification. :
Referring to the said drawings by figures and letters :-
Figure represents in perspective a portion of the frame-timbers at that part of
the frame where the stamp-ster guides are located, the guides for two of the stamp-
stems in a battery of stamps beide shown and one of the fastening wedges being
removed from its holt.s
of i

page_text: Figure 2 is a plan or top-view of the same portion of the frame and the guides
and fastenings, showing some parts in horizontal section;
:
Figure 3 is an elevation showing one of the guides in side-view, with the
horizontal timber of the frame in cross-section ;
Figure 4 is a side-view of the wedges and keys of the fastening device
Figure 5 is a top-view of the wedge (shown in Figure 4);
Figure 6 is a top-view of the guide (shown in Figure 3);
Figure 7 is a rear-view of the horizontal timber of the frame with three guides
fixed in position on the front;
138 6.
7
Figure 8 is a cross-section on the line - Figure 7, on an enlarged scale,
showing one of the locking devices that are employed to lock the nuts on the back
of the frame-timber;:..
Figure 9 is a perspective view of a construction of fastening that we use in some
cases in addition to, or as an adjunct to, the wedges and keys. The locking devices
represented in Figures 7 and 8 are employed in connection with the straps illustrated
in Figure 9.
Similar letters of reference indicate corresponding parts in the, several figures of
the drawing :
A indicates a horizontal timber in the battery frame of a stamp-mill, and A'
the upright timber at one side; *:
B B indicate the two parts forming the stamp-stem guide.
B! indicates the socket in the guide for the stamp-stem when the two parts of
the guide are brought together around the stem.
C°C are wedges that set between every two adjacent guides.
DD are screw-threaded rods or long bolts inserted through the horizontal
frame-timber (A) from the back and projecting from the front face of the timber
between the guides (B B). These bolts pass, through the wedges (C) and take
nuts D on the ends, by means of which the wedges are drawn back into, the
space between two guides.
E is a metal plate fastened to the perpendicular front face of each wedge and
having wings or projecting side-portions F that are bent forward or offset at
the top edge in such manner that the back ot, inner face of the wing has an
inclination forward.
sugor visio
When the wedge (C) is placed on the screw-threaded rod D and forced back
to place the wings (F) overlap the front face of the adjacent halves" of the
guides. (B B) but stand forward-clear of the same.
hg 2
F
.
GG are tapering keys that are inserted between the fron
front faces' of the
guides (B.B.) and the wings (F) before mentioned and are driven to place
from above.
"
ob 571
H indicates a flat bar of metal fastened by screws dgalist the front of the
horizontal timber (A) of the frame and standing out from the face thereof.
The backs of the guides (BB) are mortised of cut away as shown at B2 to
let in this bar and bring the back of the guide up against the face
face of the timber.
The aforesaid bar extends across the timber for the entire length of the same,
and is let into the backs of all the guides way out as
C are horizontal tongues or ribs on the perpendicular tapering sides of the
wedge fitting into mortises or grooves B in the sides of the guides and extending
from the front face to the back of the wedge.
und
I indicates a plate on the back of the horizontal timber, (A) secured by.screws
over the head of each long bolt D.
The head of every bolt is let into the timber flush with the back. face,and the
plate I is fastened over the recess to keep the bolt from being pressed back
while the wedge is being placed in. position!.
y 72 4.
In some cases we employ the straps K as a means to draw the guides back into
place against the horizontal timber (A) instead of using the keys- and the plates
on the wedges.

page_text: These straps may also be used to advantage as an adjunct to the keys and wedges,
particularly in mills of the larger or heavier construction, in which case the
aforesaid straps serve to increase the stiffness and stability of the guides and
counter-act the effects of the jar and vibration of the stamp-stems upon the guides.
The straps K (Figures 7 and 9) are made of bar-iron properly bent to fit over the
guide; one at top and one at the bottom of the guide, and with parallel inwardly
extending arms K' K' screw-threaded on the end and of suitable length to pass
through the .horizontal timber (A) of the frame and take nuts K on the outer
ends by means of which the strap is drawn back tightly on the guide (B B).
M is a washer-plate placed beneath the nuts on the ends of the strap of two
adjacent guides..
N is a locking device holding the nuts on each washer plate and preventing them
from turning under the vibrations of the mill.
The construction of the aforesaid. locking device is shown in Figures 7 and 8, the
piece N is attached to the horizontal timber (A) by a screw P set through a slot in
the body of the said piece near one end, while the opposite end of the piece is
beveled on the sides and is set between the nuts by a longitudinal movement of
the piece on its holding screw P.
The two nuts K' are thus held by the tongue or piece N and cannot turn on the
ends of the straps until that piece is drawn away. By setting up the screw P after
the tapered end of the piece N is placed between two nuts the lock will not be
loosened or disturbed by the vibrations of the frame when the mill is at work.
RR indicate flat strips of metal inserted between the back of the guides and the
front face of the horizontal timber (A) at the line of the straps K, and punched
with holes to let the arms of the straps pass through them.
Such strips are not used, however, unless the straps K K are employed in
conjunction with the wedges.
The two parts that form each guide have flat inner meeting-faces and the outer
sides are tapered from the back toward the front. The front and back faces are
vertical and also parallel with the perpendicular line of the stamp-stem which works
in the guide.
As fast as the guide wears down the looseness is taken up by setting the two
parts more closely together, and the inner meeting-faces of the two parts B B can
be dressed off from time to time to permit this adjustment.
The vertical sides of the wedges Care tapered to correspond with the taper
sides of the guides against which they are placed, and each, wedge is bored
longitudinally for the long bolt D.
The key (G) has a perpendicular back and a taper front face, and it is entered
from above and driven down between the guide (C) and the projecting plate (EF)
on the wedge, two of these keys being used for each guide.
As thus constructed and applied it will be noticed that the parts forming the
stamp-stem guide are easily removed from the frame and as easily inserted and
placed in position by removing the keys and loosening the wedges; and that the
parts of the guide are set up and tightened around the stamp-stem from time to
time as they become worn, by screwing up the nuts on the wedges and driving
down the keys.
In applying these improvements to the frame of a stamp mill no mortising or
cutting into the frame timbers is necessary and the frame is not weakened.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that what
we claim is :-
1. A stamp-stem guide for stamp-mills composed of the two halves or separable
blocks having straight backs, and tapering sides adapted to surround the stamp-
stem, the wedges and the bolts to hold the wedges and draw them to place, the
projecting plates on the wedges overlapping the front faces of the guides, the

page_text: tapering keys inserted between such overlapping plates and the said guides, and
the bar fixed on the front of the frame-timber and let into the back of the guide
constructed for operation as described and shown.
2. The combination with the stamp-stem guide formed of two separable blocks
fitted to the stamp-stem and having tapering sides, of the bolts, the wedges on the
bolts, the nuts to draw the wedges to place, the straps surrounding the guide at
top and bottom and provided with arms having screw-threaded ends thereon and
passing through the frame-timber of the mill and the nuts thereon to draw the
straps to place upon the guide, as described and shown.
3. The combination with the straps and the nuts on their screw-threaded ends, of
the locking device consisting of the slotted plate with a beveled end, and the fixed
screw by which it is held to place to operate as described and shown.
4. The stamp-stem guide made in two parts with beveled sides and a clamping
and holding means consisting of the bar fixed on the front timber of the mill-frame
and let into the back of the guide, the wedges and the bolts for setting up and
adjusting the parts of the guides laterally against the stamp-stem, and the keys
for setting up and holding the guide against the frame-timber as described
and shown.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.