AN IMPROVED VERTICAL HAMMER
Year: 1872

page_text: LETTERS PATENT to William Edward Gedge, of No. 11, Wellington
Street, Strand, in the County of Middlesex, Patent Agent, for the
Invention of "AN IMPROVED VERTICAL HAMMER."—A communication
from abroad by Jean Baptiste Radelet-Laurent and Son, of No. 37,
Boulevard Bonne-Nouvelle, Paris, France.
Scaled the 12th November 1872, and dated the 15th May 1872.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition,
on the 15th May 1872.
I, WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand,
in the County of Middlesex, Patent Agent, do hereby declare the nature
of the said Invention for "AN IMPROVED VERTICAL HAMMER," a com-
munication to me from abroad by Jean Baptiste Radelet-Laurent and
Son, of No. 87, Boulevard Bonne-Nouvelle, Paris, France, to be as
follows:-
The vertical hammer, tho subject of this Invention, gives all the
advantages of an ordinary steam hammer, and is driven by any kind of
continuous circular action motor, such as is found in all workshops, a
simple transmission of power by driving belts sufficing.

page_text: On the accompanying Sheet of Drawing, Fig. 1 is a front clevation
of an apparatus embodying this Invention with one of the fly wheels
removed; Fig. 2 is a side elevation; and Fig. 3, a plan.
The hammer A may receive a vertical motion of variable amplitude from
zero up to a maximum regulated by the height which may be given to
the apparatus. The hammer is uplifted by the aid of a flat iron rod B
attached to it by two cylinders or friction rollers C, which pressed against
this rod roll it between them and give it an ascending motion, carrying
the hammer with it. On ceasing to press the two friction rollers against
the hammer rod this latter is no longer drawn up by their movement,
and directly it is withdrawn from their action the hammer falls. By
protracting the pressure more or less the hammer is raised to any desired
height within the limit of its stroke. The frictional part of the two
friction rollers is of hard wood or of leather to increase the adhesion;
the breadth of the hammer rod should also be proportioned to the weight
of the hammer to uplift it easily with a moderate pressure. This pres-
sure of the two friction rollers should be equal and simultaneous for each
of them, in order that the hammer rod may suffer no bending or twisting.
For this purpose the axlo of each roller carries a pulley of same diameter,
and each of them receives an equal motion in contrary directions. As
the axles of these pulleys must approach and recede from each other at
pleasure, and as this movement could not be easily given by toothed
gearing it is obtained by the aid of two pulleys of equal size D set on two
different axles connected with each other. The axle of one of these
pulleys receives motion from any kind of motive power, and communi-
cates it to the other. This transmission is not illustrated upon the
annexed Sheet of Drawing, as its arrangement will depend upon that of
the workshop in which the apparatus is to be set up. Each axle of the
friction rollers of the hammer carries a fly K, which may be dispensed
with if desirable. As the two friction rollers to act suitably must move
with equal speed in different directions their axles are set parallel, and
each upon two bearings symmetircally placed as regards the hammer rod.
These bearings or brackets Eare moveable in two parallel slides F. Each
bracket is pierced longitudinally in the direction of the slide, and the
hole forms a nut threaded inversely for each axle. The opposite brackets
on each side are united by a screw G, each half of which is inversely
screw threaded to the same pitch as the brackets, so that on turning the
screw in the one or the other direction the brackets are made to approach

page_text: or to recede from each other. The screws and the brackets being similar
for each axle these move equally and parallely. In order that the two
screws may turn at the same time and to the same extent a similar
pinion H is set at the end of each, both pinions being driven by the
same toothed wheel I, by turning which right or left equal movements
are given to the two screws. An arrangement of levers J attached to
this toothed gearing permits its being worked from below, and tho
tightening or loosening of the friction rollers in causing the rise or fall
of the hammer. The fall of the hammer may be left quite free by.
loosening sharply, or be moderated at pleasure by slackening the pressure
more or less. L, uprights guiding hammer; M, anvil; N, table or
frame carrying entire mechanism.
.
In cases when it is desirable to leave the hammer suspended a shifting
stop will be provided to keep it at the desired height during the required
time. The removal of the stop will permit the hammer to fall again.
This hammer is of a very simple construction, strong, and cheap; it
occupies but little space, may be driven by any motive power, and be
worked by a child; it will therefore be found very useful for work not
sufficiently important to justify the great expense of setting up an
ordinary steam hammer.
The, shape, dimensions, and details of construction of the various parts
of this apparatus may be modified, and such metals and materials be used
as may be found most suitable for the power to be obtained and the
special application of the hammer.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Edward Gedge in the Great Seal Patent
Office on the 13th November 1872.
.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAN.
EDWARD GEDGE, of No. 11, Wellington Street, Strand, in the County of
Middlesex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifteenth day of May, in the year of
our Lord One thousand eight hundred-and-seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Edward Gedge, Her special licenco

page_text: 0
that I, the said William Edward Gedge, my executors, administrators,
and assigns, or such others as I, the said William Edward Gedge,
my executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during tho
term therein expressed, should and lawfully might make, use, exercise, &
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
VERTICAL HAMMER," a communication to me from abroad by Jean
Baptiste Radelet-Laurent and Son, of No. 37, Boulevard Bonne-
Nouvelle, Paris, France, upon the condition (amongst others) that I, 1
the said William Edward Gedge, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six ]
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said William Edward Gedge, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and 2
by the following statement:-
The vertical hammer, the subject of this Invention, gives all the
advantages of an ordinary steam hammer, and is driven by any kind of
continuous circular action motor, such as is found in all workshops, a
simple transmission of power by driving belts sufficing.
On the accompanying Sheet of Drawing, Figure 1 is a front elevation
of an apparatus embodying this Invention with one of the fly wheels
removed; Figure 2 is a side elevation of same; and Figure 3, a plan.
2
The hammer A may receive a vertical motion of variable amplitudo
from zero up to a maximum regulated by the height which may be given 3
to the apparatus. The hammer is uplifted by the aid of a flat iron rod B
attached to it by two cylinders or friction rollers C, which pressed against
this rod roll it between them and give it an ascending motion, carrying
the hammer with it. On ceasing to press the two friction rollers against
the hammer rod this latter is no longer drawn up by their movement, g
and directly it is withdrawn from their action the hammer falls. By
protracting the pressure more or less the hammer is raised to any desired

page_text: height within the limit of its stroke. The frictional part of the two
friction rollers is of hard wood or of leather to increase the adhesion; the
breadth of the hammer rod should also be proportioned to the weight of
the hammer to uplift it easily with a moderate pressure. This pressure
5 of the two friction rollers should be equal and simultaneous for each of
them, in order that the hammer rod may suffer no bending or twisting.
For this purpose the axle of each roller carries a pulley of same diameter,
and each of them receives an equal motion in contrary directions, as
indicated by the arrows, Fig. 1 of the accompanying Sheet of Drawing.
) As the axles of these pulleys must approach and recede from each
other at pleasure, and as this movement could not be easily given by
toothed gearing it is obtained by the aid of two pulleys of equal size D
set on two different axles connected with each other. The axle of one
of these pulleys receives motion from any kind of motive power, and
5 communicates it to the other. This transmission is not illustrated upon
the annexed Sheet of Drawing, as its arrangement will depend upon
that of the workshop in which the apparatus is to be set up. Each axle
of the friction rollers of the hammer carries a fly K, which may be dis-
pensed with if desirable. As the two friction rollers to act suitably must
O move with equal speed in different directions their axles are set parallel,
and each upon two bearings symmetrically placed as regards the hammer
rod. These bearings or brackets E are movable in two parallel slides F.
Each bracket is pierced longitudinally in the direction of the slide, and
the hole forms a nut threaded inversely for each axle. The opposito
5 brackets on each side are united by a screw G, each half of which is
inversely screw threaded to the same pitch as the brackets, so that on
turning the screw in the one or the other direction the brackets aro
made to approach or to recede from each other. The screws and the
brackets being similar for cach axle these move equally and parallely.
› In order that the two screws may turn at the same time and to the same
extent, a similar pinion H is set at the end of each, both pinions being
driven by the same toothed wheel I, by turning which right or left equal
movements are given to the two screws. An arrangement of levers J
attached to this toothed gearing permits its being worked from below,
the tightening or loosening of the friction rollers resulting in the rise or
fall of the hammer. The fall of the hammer may be left quite free by
loosening sharply, or be moderated at pleasure by slackening the pressure
more or less. L, uprights guiding hammer in its stroke; M, anvil;
N, table or frame carrying entire mechanism.