Improvements in Steam Stamps.
Year: 1891

page_text: Date of Application, 29th Apr., 1891
Complete Specification Left, 29th Jan., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Stamps.
I EDWARD SAMUEL BRETT, of Ventnor Villa, Leicester Road, Coventry in
the County of Warwick, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the construction and arrangement of steam drop stamps,
in which a part rotative piston is employed to operate the lifting pulley &c., and
is intended to provide more especially, improvements upon an invention for which
Letters Patent were granted to me and another, bearing date Feb. 24th 1890, and
numbered 2924.
The object of this my invention is to provide in combination with the raising
mechanism of such stamps, a device whereby they may be rendered automatic in
their action.
Briefly, the construction and arrangement of these hammers is as follows:-
I employ a block, pillar guides, and hammer &c., similar to those at present in
use. To the hammer is attached a flexible band preferably of metal.
At the upper part of the pillars I provide the raising mechanism which is
carried upon two strong columns or other suitable structure. At the one side a
steam cylinder is provided, having a part rotating piston rod shaft concentric
thereto.
Upon this piston rod shaft is formed a (plate) piston to which is imparted a part
rotative movement, that is, somewhat less than a complete revolution.
A suitable steam chest end valve or valves (preferably of the circular type), is
arranged in connection with the cylinder, and also rods, and levers &c., by which
the said valve or valves can be worked.
In some cases, if desired, I may provide a similar cylinder upon both sides of
the structure.
Upon the piston rod shaft, about the centre of the machine, I provide a loose
pulley, of a suitable width to carry the aforesaid lifting band. Upon each side of
this loose pulley, a lever is firmly secured to the shaft which extends to a little
beyond the rim of the said pulley, terminating with a cross pin &c., connecting
their two ends together, and upon and to which is connected the upper end of the
aforesaid band.
It is in connection with the said steam valve or valves that this my invention
is more particularly associated and in its automatic operation.
To effect this, I proceed somewhat as follows:-
=
Upon the part rotative piston shaft, I provide a plate upon which is carried an
adjustable pallet or striking piece or pieces, and in combination therewith I arrange
upon the spindle of the aforesaid valve, a lever or system levers upon which the
said adjustable pieces or piece shall act. Preferably 1 employ two valves, the one
to be operated upon direct by the levers and striking pieces automatically whilst
the second may control the first if desired, and is operated by hand.
The position and arrangement of these valves is such, that, assuming the valve
to be ready to make its forward movement and lift the hammer, steam is being
admitted full through the second and also through the first. The piston having
travelled its journey, the striking piece comes in contact with the lever which is in
communication with the first valve, and shuts off steam and also opens to exhaust,
when immediately the hammer falls and in so doing the piston again is returned to
its normal position again, to receive steam for its next forward motion. In this
falling of the hammer the striking piece also is returned and at the end of its

page_text: return stroke operates upon the reverse side of the lever, and in so doing again
opens the valve to steam, when the operation is repeated.
In order to shorten the automatic stroke of the hammer, I provide an extra
striking piece upon the plate aforesaid, (or lengthen the one) so that at such
desired height of lift, it may strike the lever, and shut off steam as before.
The second valve through which the steam has to pass to the first, is
manipulated by the workmen, so that he may completely at will cut off the
steam supply, or, he may by so doing obtain an occasionally desired short blow
- of the hammer.
in
Although I prefer the two valves as described, still can effect a less desirable
arrangement, by providing a manipulating arrangement of levers to the first valve
in addition to the automatic arrangement, and so dispense with the second..
In some cases the steam cylinder and valves &c. may be situated upon or
underneath the floor, or at any other convenient position, in which cases the
lifting band would run over an idle pulley at the upper end of the guides or
pillars.
"
Dated this 28th day of April 1891.
CHARLES T. POWELL,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Steam Stamps.
1, EDWARD SAMUEL BRETT, of Ventnor Villa, Leicester Road, Coventry in
the County of Warwick, Engineer, 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 the construction and arrangement of the raising
mechanism of steam drop stamps, in which a part rotative piston is employed to
operate the lifting pulley &c., and is intended to provide more especially, improve-
ments upon an invention for which Letters Patent were granted to me and another,
bearing date Feb. 24th 1890, and numbered 2924.
The object of this my invention is to provide, in combination with the raising
mechanism of such stamps, a device whereby they may be rendered automatic in
their action.
Briefly, the construction and arrangement of these hammers is as follows:-
I employ a block, pillar guides, and hammer &c., similar to those at present" in
use. To the hammer is attached a flexible band preferably of metal. At the
upper part of the pillars I provide the raising mechanism which is carried upon
two strong columns or other suitable structure. At the one side a steam cylinder
is provided, having a part rotating piston rod shaft concentric thereto.
In some cases, if desired, I may provide a similar cylinder upon both sides of
the structure.
In some cases the steam cylinder and valves &c. may be situated upon or under-
neath the floor, or at any other convenient position, in which cases the lifting band
would run over an idle pulley at the upper end of the guides or pillars.
Upon the piston rod shaft, about the centre of the machine, I provide a loose
pulley, of a suitable width to carry the aforesaid lifting band. Upon each side
of this loose pulley, a lever is firmly secured to the shaft which extends to a little
beyond the rim of the said pulley, terminating with a cross pin &c., connecting
their two ends together, and upon and to which is connected the upper end of the
aforesaid band.
Upon the piston rod shaft is formed a (plate) piston to which is imparted a
part rotative movement, that is, somewhat less than a complete revolution.
A suitable steam chest and valve or valves (preferably of the circular type), are

page_text: cylinder A. The cutaway portion L, of this valve forms the exhaust port, as seen
in Fig. 5, where the valve J, has been rotated so as to cut off the supply and
open to exhaust outlet M. N, is a second valve which first controls the supply of
steam, and may be of the rotative type or of the sliding type. As illustrated in
Fig. 4, steam is admitted through the port O, around the valve N, thence through
the valve J, into the cylinder. By lifting the valve N, however as seen in
Fig. 5, by means of the hand lever P, the supply of steam is cut off.
Upon the valve spindle is fixed the lever Q, whose forward end extends to the
plate R, which latter is fixed to the piston shaft B, and upon whose face is carried
the striking piece S, which, (as the piston is rotated) is carried round and lifts the
lever Q, into the position shown in dotted lines, and thereby turns the valve J,
into the position shown in Fig. 5, and so cuts off the steam supply and also opens
the interior of the cylinder to the exhaust. Upon the steam being thus released
the hammer falls suddenly, and in so doing the piston is rotated back to its normal
position. In this return stroke of the piston the plate R, is of course carried with
it and in so doing the striking piece T, comes in contact with the opposite side of
the lever Q, and pushes it back into its former position and thereby again opening
the valve port K, to steam, when a repeat process takes place.
It will be readily seen that the precise arrangement of levers or striking pieces
may be modified to suit the particular valve used, as for instance in Figs. 6 and 7,
in which the valve J', is a vertical sliding one, and is operated automatically by
the rocking lever U, which is connected by means of the rod V, to the swing
lever W, which latter is operated upon by the striking pieces S' and T', in the
same manner as already described for the lever Q.
In some cases I may dispense with the second valve N, and its attendant parts,
by providing upon the spindle of the valves J or J', a hand lever X or X', as
seen in dotted lines in Figs. 3 and 6, by which the said valves may be operated
independent of the automatic arrangements.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
In steam drop stamps, the automatically operating of the steam valve, from the
part rotative shaft B, by the striking pieces and levers, or their equivalents, sub-
stantially as set forth and shown upon the drawings.
Dated this 28th day of January 1892.
CHARLES T. POWELL,
Applicant's Agent.