Improvements in Pneumatic Hammers for Caulking, Chipping, Rivetting, Fettling, and the like Purposes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Hammers for Caulking, Chipping,
Rivetting, Fettling, and the like Purposes..
I JOHN MOORE of Moss Street York in the County of York, Foreman Smith,
do hereby declare the nature of this invention to be as follows:-
In the present construction of pneumatic hammers, one hand of the operator is
required to hold the chisel or tool, and the thumb of the other hand must be upon
the trigger or thumb piece of the valve.
My improvements consist in securing the tool or chisel to the hammer so that it
needs no holding, and the shoulder can bear upon the heel of the hammer, and the
hands hold the body, and by simply pressing the tool against its work, the valve is
opened and the tool is operated, should the tool slip from its work, the valve is
immediately closed and no injury can be done to the hands of the operator.
I employ a socket attached to the holder end of the hammer, in this socket is
placed the tool, which I make with an extra shoulder, to bear against a spring
ferrule or socket upon which is a finger or projection connected to a push rod,
which passes along a sheath or cover to the trigger connected with the valve, in
the attachable socket I form a series of holes or slots for pins or cotters, with
similar holes in the tool, to secure it in position and prevent it turning or slipping
out, to keep it taut against the spring, this arrangement is equally applicable to
hexagon and to round tools.
It will be seen that by simply pressing the tool against its work, the push rod is
moved, the valve opened, and the tool in operation, the moment the tool is out of
contact with its work the valves close and it stops work.
001 T
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds, and
Crossley Street, Halifax,
Patent Agent to the Applicant.
Improvements in Pneumatic Hammers for Caulking, Chipping,
Rivetting, Fettling, and the like Purposes.
I, JOHN MOORE, of Moss Street, York, in the County of York, Foreman Smith,
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:-
In the present construction of pneumatic hammers, and other percussive tools of
the like nature, one hand of the operator is required to hold the chisel or tool, and
the thumb of the other hand must be upon the trigger or thumb piece for
operating the valve.

page_text: My improvements consist in securing the tool or chisel to the hammer so that
it needs no holding, and the shoulder or breast of the operator can bear upon the
heel of the hammer, and both hands hold the body. of the hammer and by simply
pressing the tool against its work the valve is opened and the tool operated.
Should the tool slip from its work, the valve is immediately closed and no injury
can be done to the bands of the operator.
DESCRIPTION OF DRAWINGS.
Fig. 1 is an elevation partly in section showing my invention applied to the
Boyer pneumatic hammer.
Fig. 2 is a plan of Fig. 1.
I employ a socket A attached to the holder end of the hammer B.
In this socket is placed the tool C, which I make with an extra shoulder D, to
bear against a spring ferrule or socket E, upon which is a finger or projection F,
connected to a push rod G, which passes along a sheath or cover H, to the pivotted
lever J, and trigger J', which is connected with the valve K of the hammer.
In the attachable socket A I form a series of holes or slots L, for a pin or
cotter M, with a pin or cotter hole_in_the tool C, to secure it in position and
prevent it turning round or slipping out, and to keep it taut against the
spring E.
This arrangement is equally applicable to hexagonal and to round tools. For
easy working on the end of the lever J, bearing upon the trigger J¹, I attach a
grooved runner or disc N. P is the cap or cover.
When constructing new hammers the push rod may work in a groove or slot in
the hammer.
It will be seen that by simply pressing the tool C against its work, the push
rod G is moved, which depresses the runner N and trigger J¹, opening the valve
and thus putting the tool in operation.
The moment the tool is out of contact with its work, the spring draws back the
push rod, and the valve is closed, and it stops work.
By regulating the pressure of the tool against its work, the lightness of the blow
or stroke is regulated; the push rod G can be regulated as to its contact with the
lever J, by means of the screwed end G¹, and nuts H³.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. In pneumatic hammers and similar percussive tools, connecting the tool with
the trigger operating the valve, whereby the pressing of the tool against its work
operates the valves and puts the hammer in operation, and the moment the tool is
out of contact with its work, it is inoperative, substantially as described.
2. In pneumatic hammers or other like percussive tools, the combination of the
tool C, spring E', socket or ferrule E, push rod G, lever J, and trigger J' for
operating the valve as and for the purposes substantially as shown and
described.
Dated this 27th d 1007
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent to the Applicant.
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent to the Applicant.