Improvements in and connected with Drop Hammers, the same being applicable to other Analogous Purposes.
Year: 1895

page_text: Date of Application, 14th Feb., 1895
Complete Specification Left, 13th Nov., 1895-Accepted, 1st Feb., 18:6
PROVISIONAL SPECIFICATION,
Improvements in and connected with Drop Hammers, the same
being applicable to other Analogous Purposes.
We THOMAS LEES of King's Arms Hotel, Girvan, Scotland, Hotel Keeper,
and WILLIAM DOUGLAS of 7 Strathallan Terrace, Dowanhill, Glasgow, Mining
Agent, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in and connected with drop hammers, the
same being applicable to other analogous purposes.
In carrying out our invention, the hammer is worked on a frame having an
ordinary upright slide guide and the usual opening between the cheeks of the slide
or the hammer may be guided by an upright stem attached to the hammer, the stem
working vertically through openings in horizontal part of frame, the openings being
made to fit the stem. The hammer is raised by an endless chain or band passing
over pulleys or drums and situated on the opposite side of the frame, the part of
the chain nearest the frame for the time being moving upwards. The hammer has
an attachment situated within a channel or sleeve near the face next to the chain
Which attachment is
or band, or this attachment may be above the hammer.
To this attachment a trigger is
capable of an independent vertical movement.
pivoted, one end of which terminates in a hook or catch projecting through the
opening in the slide towards the chain or band, while the other projects in the
opposite direction. When an upright stem is used to guide the hammer an opening
is made in the stem through which the trigger projects.
After each drop of the hammer and when it is at rest, the attachment descends
within its sleeve until it is wholly or partially contained therein. The movement
pulls downward the hooked end of trigger projecting towards chain, the tail end of
trigger being held up by top of hammer, or projection on stem of hammer, the
effect of which being that the trigger is hooked on to the chain. Thus when the
shaft is set in motion the hammer which is suspended by the trigger, is raised by
means of the upward movement of the chain to the required height, when the
tail end of trigger comes in contact with the weight or other equivalent suspended
from or attached to the upper end of the slide or frame and pressing it down
unhooks the other end of catch from the chain or belt and so causes the hammer to
drop. The hook or catch then automatically engages with the chain as already
described. The weight or equivalent can be raised or lowered at will, so that any
desired drop of the hammer may be given.
Under a modification of our improvements the trigger may be centred on top of
hammer and is booked on to the chain by means of a vertical rod or bar passing
loosely through the hammer. While the hammer is in suspension and during its
fall the lower end of the said rod or bar projects below it, so that when the hammer
is about to strike, the rod rises upwards and so raises the tail end of the trigger,
and the hammer is hooked on to chain so soon as the blow is struck.
unhooking is accomplished as already described.
The
As a further modification, the trigger may be pivoted to a rod or stem to which
the hammer is attached. Fixed to this rod or stem there is an outwardly projecting
piece to which there is pivoted a weighted lever. To the framework there is fixed
an adjustable stop representing the weight or other equivalent as already mentioned,
When the hammer is in its lowest or normal
for regulating the fall of the hammer.
position the hooked end of the trigger engages with the chain, while the other end

page_text: rests on one end of the weighted lever. As the shaft is set in motion the hammer
is raised until the opposite end of the trigger comes in contact with the stop which,
pressing down that end of the trigger releases the other end or catch from the chain
and so allows the hammer to fall and when it has reached its lowest limit the hooked
end of the trigger again engages with the chain by means of the weighted lever
and so on.
As an alternative method in place of having one end of the trigger in the form
of a hook it may be in the form of a link and on each link or any desired number
of links of the endless chain we would provide a hook or catch which as the chain
was raised would engage with the link end of the trigger.
As a further modification, in place of having the trigger working on a pivot we
may have it working in a slot. When the hooked end of the trigger in this case
has been released from the chain, the other end of the trigger comes in contact
with a projection fixed on the upper side of the outwardly projecting piece, already
referred to and tilts the hooked end of the trigger over, when it again engages with
the chain.
Several hammers can be geared to the same driving shaft.
Improvements in and connected with Drop Hammers, the same
being applicable to other Analogous Purposes.
We THOMAS LEES, of King's Arms Hotel, Girvan, Scotland, Hotel Keeper,
and WILLIAM DOUGLAS, of 7 Strathallan Terrace, Dowanhill, Glasgow, Mining
Agent, 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 :-
Our invention relates to improvements in and connected with drop hammers,
the same being applicable to other analogous purposes.
In order that our invention may be properly understood and readily carried into
effect we have hereunto appended an explanatory sheet of drawings, in the
several figures of which corresponding parts are marked with the same letters of
reference.
Figure 1 is a front elevation of machine constructed according to our
improvements.
Figure 2 is a side elevation partly in section of the same.
Figure 3 is a detached view of one form of trigger.
Figure 4 is a similar view of further modification of trigger and slot
arrangement.
Figure 5 is a front view of a particular form of chain.
In carrying out our invention the hammer A is worked on a frame B, and is
guided by an upright stem C attached to the hammer A, the stem working
vertically through openings D in horizontal part of frame, the openings D being
made to fit the stem C. The hammer A is raised by an endless chain, band or
other equivalent F, passing over pulleys or drums G, carried on two transverse
shafts GG and situated on the opposite side of the frame, the part of the
chain F¹ nearest the frame for the time being moving upwards. The trigger I is
pivoted to the rod or stem C to which the hammer A is attached. Fixed to this
rod or stem C there is an outwardly projecting piece N to which there is pivoted a
cighted lever O. To the framework there is fixed an adjustable stop or bar L

page_text: for regulating the fall of the hammer A. When the hammer A is in its lowest or
normal position the hooked end J of the trigger I engages with the chain F, while
the other end 1' rests on one end K of the weighted lever O. As the shaft is set in
motion the hammer A is raised until the opposite end 1 of the trigger I comes in.
contact with the stop L, which, pressing down that end of the trigger, releases the.
other end or catch J from the chain, and so allows the hammer A to fall, and
when it has reached its lowest limit the hooked end J of the trigger again engages.
with the chain F by means of the weighted lever, and so on.
As a modification the stem C may have an attachment H situated within a
channel near the face next to the chain or band F' as shown in Figure 3, or
this attachment may be fixed to the hammer and the hammer guided between slides.
without a stem, which attachment is capable of an independent vertical movement..
To this attachment H the trigger I is pivoted, one end of which terminates in a
hook or catch J projecting through the opening in the stem toward the chain or
band F, while the other I projects in the opposite direction.
Simultaneously with each drop of the hammer A the attachment descends.
within its sleeve until it is wholly or partially contained therein through the
hooked end J of the trigger I becoming disengaged from the chain as will.
be hereafter described. This movement pulls downward the hooked end J
of trigger I projecting towards chain, the tail end of trigger being held
up by top of hammer or projection kou stem of hammer A, the effect of
which being that the trigger I is hooked on to the chain F. Thus when the
shaft G is set in motion the hammer A, which is suspended by the trigger I,.
is raised by means of the upward movement of the chain F to the required
height, when the tail end 11 of trigger I comes in contact with the weight L or
other equivalent suspended from or attached to the upper end of the slide or frame,
and pressing it down unhooks the other end J of catch from the chain or belt, and
so causes the hammer A to drop. The hook or catch J then automatically engages.
with the chain as already described. The weight L or equivalent can be-
raised or lowered at will, so that any desired drop of the hammer A may
be given.
As a further modification, in place of having the trigger working on a pivot we
may have it working in a slot S as shown in Figure 4. When the hooked end of
the trigger in this case has been released from the chain the other end 1' of the
trigger comes in contact with the end K of the weighted lever O, and tilts the
hooked end J of the trigger I over, when it again engages with the chain, in same-
manner as that described with reference to Figures 1 and 2.
In lieu of constructing the chain with cross-bars at every link as shown in.
Figures 1 and 2, one cross-bar may be provided at every alternate, or every third
link, or more as shown in Figure 5. To effect the automatic engaging of the
hooked end J of the trigger I with the cross-bar so formed a spring or other
mechanical equivalent may be employed.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In drop bammers, the combination of the trigger I, rod C, and counterweight O,
or other equivalent, operating automatically to attach and release the hammers to
and from an endless travelling chain, band, or other equivalent, substantially as.
described and illustrated on the accompanying drawings.
• Nanamkan 1005
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicants' Agents.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicants' Agents.