A NEW OR IMPROVED DIRECT- ACTING LIFT OR TILT HAMMER."
Year: 1866

page_text: LETTERS PATENT to Robert Leigh, of the Douglas Forge, Wigan, in the
County of Lancaster, for the Invention of "A NEW OR IMPROVED DIRECT-
ACTING LIFT OR TILT HAMMER."
PROVISIONAL SPECIFICATION left by the said Robert Leigh at the Office
of the Commissioners of Patents, with his Petition, on the 13th August
1866.
I, ROBERT LEIGH, of the Douglas Forge, Wigan, in the County of
Lancaster, do hereby declare the nature of the said Invention for "A NEW
OR IMPROVED DIRECT-ACTING LIFT OR TILT HAMMER," to be as follows:
This Invention relates to certain improvements in the construction of direct-
acting lifts or tilt hammers whereby a regular succession of lifts is effected at
each revolution of the driving shaft. I propose to bolt to a foundation plate
a standard of a curvilinear form extending from the foundation, and termi-
nating in a vertical line, in order to receive the vertical shaft of the tilt hammer
in bearings bolted or cast to the side of the standard. The upper part of the
curved portion of the standard is provided with a journal block to receive the
driving shaft, at one end of which is a fly wheel, and at the other (in a line
with the tilt) is a cam divided into four sections to give four motions at each
revolution; the cam has four teeth equidistant from each other on its periphery,
and between the teeth are four curved recesses in the cam; a hub or projection
on the tilt is acted upon by each tooth successively, and the tilt hammer is
thus raised; as soon as the tooth escapes from the projection the tilt rapidly

page_text: descends, and is in turn again actuated by the next tooth; the tilt hammer
descends on an anvil bolted to the foundation. The driving shaft is to be
properly set in bearings in the usual manner and driven by steam power or
otherwise.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Leigh in the Great Seal Patent Office on the 13th
February 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
LEIGH, of the Douglas Forge, Wigan, in the County of Lancaster, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of August, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Robert Leigh, Her special licence that I, the said Robert Leigh, my exe-
cutors, administrators, and assigns, or such others as I, the said Robert
Leigh, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time, and at all times thereafter during
the 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 "A NEW OR IMPROVED
DIRECT-ACTING LIFT OR TILT HAMMER," upon the condition (amongst others) that
I, the said Robert Leigh, 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 Robert Leigh, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This Invention relates to certain improvements in the construction of direct-
acting lifts or tilt hammers whereby a regular succession of lifts is effected
at each revolution of the driving shaft. I propose to bolt to a foundation
plate a standard of a curvilinear form extending from the foundation and

page_text: terminating in a vertical line in order to receive the vertical shaft of the tilt
hammer in bearings bolted or cast to the side of the standard. The upper
part of the curved portion of the standard is provided with a journal block
to receive the driving shaft, at one end of which is a fly wheel and at the other
(in a line with the tilt) is a cam ring divided into four or any number of
sections required to give four motions at each revolution; the cam ring has
four teeth equidistant from each other on its periphery; a hub or projection
on the tilt is acted upon by each tooth successively, and the tilt hammer is
thus raised; as soon as the tooth escapes from the projection the tilt rapidly
descends and is in turn again actuated by the next tooth; the tilt hammer
descends on an anvil bolted to the foundation. The driving shaft is to be
properly set in bearings in the usual manner and driven by steam or water
power.
In the Drawings annexed Fig. 1 represents a section, Fig. 2 a side, and
Fig. 3 a front view of the direct-acting tilt hammer. a is the standard in
which the vertical shaft of the hammer c works; d is the cam ring, and
e, e, e, e, the teeth which raise consecutively the hub f, thus lifting the tilt
hammer.
Having now described the nature of my said Invention, and the manner in
which the same is to be performed, I would remark in conclusion that I do
not limit myself to the exact form described and shewn, as the same may
obviously be varied without in any way departing from the principles of the
Invention; but what I claim and desire to be secured to me by the herein in
part recited Letters Patent is, the construction of the "New or Improved
Direct-acting Lift or Tilt Hammer," substantially as herein specified and
shewn.
In witness whereof, I, the said Robert Leigh, have hereunto set my
hand and seal, this Fifth day of February, in the year of our Lord
One thousand eight hundred and sixty-seven.
Witness,
JAMES LEIGH, Ju'.
27, Primrose Hill,
Wigan.
ROBERT LEIGH. (L.S.)