IMPROVEMENTS IN PNEUMATIC HAMMERS
Year: 1887

page_text: Date of Application, 3rd Feb., 1887
Complete Left, 3rd Nov., 1887
Complete Accepted, 6th Dec., 1887
I, GILBERT GLOSSOP Victoria Road Heeley Sheffield in the County of York
Engineer do hereby declare the nature of my said invention for IMPROVEMENTS IN
PNEUMATIC HAMMERS to be as follows:-
My invention of improvements in pneumatic Hammers, consists in the first place
of the application of a brake of any suitable construction, in such a manner as to
produce frictional resistance to the movement of the tup when desired, and so as to
enable the power or weight of the blow to be regulated, without altering the driving
speed; and secondly in the arrangement of a water jacket and fittings to the moving
Cylinder of such Hammers.
The first part of my invention may be carried out in various ways, for example,
a brake block may be fixed to the frame of the hammer in such a manner that until
required it shall stand free from the tup, but when the man who is working the
hammer desires, he can by means of a short lever and a connecting rod attached to
the foot lever at once apply the brake to the tup, without interfering with the action
of the moving air Cylinder.
By applying the brake gradually and withdrawing it in the same gradual, way, the
weight of the blow may be, graduated from the lightest to the heaviest that the
Hammer is capable of giving..
In carrying into effect the second part of my invention, I cast or otherwise form a
surrounding chamber for water, upon the air cylinder, and in the top of such chamber
by preference, I construct two openings, necks or glands into which I fit the ends of
an inlet and outlet pipe. The ends of the pipes are held securely in brackets so that
they slide through the necks or glands in a similar manner to the piston rod of an
Engine, except that in this case the cylinder moves and the pipes are stationary.
One pipe is connected with the water supply, and the other leads to any suitable
outlet. The object of the water-jacket is to keep the air cylinder cool.
ROBT. F. DRURY,
Agent for the Applicant.

page_text: Improvements in Pneumatic Hammers.
I, GILBERT GLOSSOP Victoria Road, Heeley, Sheffield in the County of York
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:-
My invention of improvements in Pneumatic Hammers, consists in the application
of a brake that may be applied or withdrawn by means of a hand or foot lever as
preferred, so as to retard or stop the action of the Tup.
It refers more particularly to such pneumatic bammers as are constructed with an
air Cylinder, to which a vertical reciprocating action is given by means of a
connecting rod attached to a crank and revolved by any well known means such as a
pulley and driving belt; the tup or hammer being secured to the piston rod of the air
Cylinder.
The object attained by the application of such a brake in the manner hereinafter
described, is to enable the workman to regulate the power of the blow, without
interfering with or stopping the action of the air Cylinder or driving pulley.
The annexed sheet of drawings will enable my invention to be clearly understood,
as they illustrate a convenient method or plan of carrying out my invention; the
same letters of reference indicate the same parts in any of the figures in which they
occur.
Fig. 1, is a side elevation of a hammer to which my invention is applied.
Fig. 2, shows the inside face of one of the standards (A) with the brake.
Fig. 3, a plan of the brake action.
The Hammer may be of any suitable design, in the one illustrated A and B,
represent the Standards, C is the Crank shaft, upon which the flywheel and driving
pulley is fixed, D is the air Cylinder, E is the Tup F is the brakeblock let into the
inside face of the standard A, in such a manner that it can be forced against the side
of the tup and withdrawn as desired, by means of the horizontal action of the
wedge G, which fits in a tapered recess formed in the standard behind the brake
block F.
The wedge may be operated by any suitable mechanical arrangement, such as a
short slotted arm H, connected with a foot lever or treaddle I, or with a hand lever J,
in such a manner that by forcing in the wedge G, gradually, the force of the blow of
the tup may be reduced until the top comes to a standstill or complete stoppage,
without interfering with the motion of the Cylinder D.
It will thus be seen that any desired blow from the lightest to the heaviest that the
hammer is capable of giving, may be produced at will by the workman.

page_text: I do not bind myself to the construction nor to the position of the brake as these
may be altered to suit different designs of hammers such for example would be the
case in a double standard hammer, but:-
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :-
In Pneumatic Hammers the combination with the Tup, of a suitable brake, by
means of which the Tup may be retarded or stopped for the purpose specified, and
substantially as hereinbefore described and shown.“
D1
CAT
1007