Improvements in and relating to Power-hammers.
Year: 1899

page_text: Date of Application, 19th June, 1899-Accepted, 2nd Sept., 1899
COMPLETE SPECIFICATION..
Improvements in and relating to Power-hammers.
I, GEORG LEONHARD WALTER, of Schwabach, Bavaria, in the Empire of
Germany, Mechanician, 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 power-hammers, and has for its object to provide a
machine in which the hammer-head is not directly driven but has a certain
amount of play and in which the stroke of the hammer-head may be adjustable.
during the operation of the machine.
The invention is illustrated in the accompanying drawings, in which,
Figure 1 represents in front elevation a power-hammer constructed in accord-
ance with the invention, while,
Figure 2 is a plan corresponding thereto, and,
Figure 3 is a side view corresponding thereto, while,
Figure 4 is a sectional elevation of the hammer-head employed.
Figure 5 is a sectional elevation of an alternative form of hammer-head that
may be employed.
The invention consists of a power-hammer in which the movement of the
hammer-head is caused and regulated by means of straps, cords or chains whose
extremities are affixed to the frame and are arranged transversely to the direction
of movement of the hammer-head, the movement being caused upon the recipro-
cation of the main sliding frame within which the hammer-head is fitted so as
to slide in the same direction. The main sliding frame is reciprocated by such
means as a crank and connecting rod and has a positively determined stroke.
In carrying the invention into effect as illustrated in the accompanying
drawings the main sliding frame is fitted so as to slide within grooves provided
in the main frame b of the machine and its reciprocation is effected by means
of a crank disc c and connecting rod d. Straps e and fare fitted to the machine
frame preferably upon pulleys ghandik which are capable of rotation and are
so arranged as to be transverse to the direction of movement of the main sliding
frame. The hammer-head is mounted within the main sliding frame v in
a V groove and has provided thereupon a boss or neck which lies between
the straps e and f as clearly shown in Figures 1 and 4. Pulleys and m
and and are mounted upon the main sliding frame a and bear upon the
straps c and f in such a manner that upon the reciprocation of the main sliding
frame a the respective straps e and fare alternately tightened so as to impel
the hammer-head upwards or downwards.
As before mentioned the pulleys g and h and i and k are capable of slight
rotation for the purpose of adjusting the length of the straps e and f and their
ositions may be fixed by such means as a ratchet wheel and pawl.
Instead of two straps e and f being employed one alone may be used in
which case instead of one boss or neck being provided upon the hammer-head p
two bosses or abutments such as 7 and (Figure 5) may be provided.
The straps may, of course, be replaced by ropes or chains and the pulleys

page_text: and hand and k be fixed abutments. Further, instead of the hammer-head
and main sliding frame being operated in a vertical plane it is obvious that
they may be employed so as to reciprocate horizontally, and any incidental
alterations in the construction of the machine may be made in such a case
without departing from the essential features of the invention.
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:
1. A power-hammer consisting of a main sliding frame and straps or their
equivalents arranged transversely thereto, the ends of which are fixed to the
machine frame and are alternately shortened on the reciprocation of the main
sliding frame thereby causing the upward and downward movement of the
hammer-head, substantially as described.
2. A power-hammer, such as specified in Claim 1, in which the straps or their
equivalents are secured at their extremities to pulleys mounted upon the machine
frame and are capable of being adjusted in length in the manner for the purpose
and substantially as described.
3. A power-hammer, such as specified in Claim 1, in which one strap or its
equivalent is employed in the manner substantially as herein before described.
4. A power-hammer constructed and operating, substantially as herein before
described and illustrated.
Dated this 19th day of June 1899.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents.