IMPROVEMENTS IN THE CONSTRUCTION OF FENCES OR Disma PROVISIONAL SPATION CASINGS FOR SHAFTS, PULLEYS, AND OTHER PARTS OF MACHINERY
Year: 1855

page_text: LETTERS PATENT to Hamilton Martin and Joseph Smethurst, both of
the Guide Bridge Iron Works, near the City of Manchester, Engineers,
for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF FENCES OR
Disma
PROVISIONAL SPECIFICATION left by the said Hamilton Martin and
Joseph Smethurst at the Office of the Commissioners of Patents, with
their Petition, on the 26th February 1855.
We, HAMILTON MARTIN and JOSEPH SMETHURST, both of the Guide Bridge
Iron Works, near the City of Manchester, Engineers, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF
FENCES OR CASINGS FOR SHAFTS, PULLEYS, AND OTHER PARTS OF MACHINERY," to be
as follows:-
Our Invention consists in constructing the fences or casings of shafts of
semicircular troughs of cast iron or other material supported by the bearings
or hangers in which the shafts revolve, and by brackets or stays attached to
the walls or beams of the building. The troughs are connected together so as
to form a complete fence or casing by clips, and to the troughs are cast or
attached when requisite semi-disks to fit the ends of the pulleys, drums, or
wheels keyed on the shaft. These semi-disks, by closing up the ends of the
pulley, drum, or wheel, prevent any accident that might otherwise occur from
the arms or the keys when exposed. Coupling boxes or other projections on
the shafts may be fenced by making the casing of an enlarged diameter at the
part required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Hamilton Martin and Joseph Smethurst in the Great Seal
Patent Office on the 25th August 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, HAMILTON
MARTIN and JOSEPH SMETHURST, both of the Guide Bridge Iron Works, near
the City of Manchester, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of February, in the year of our Lord
One thousand eight hundred and fifty-five, in the eighteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the said
Hamilton Martin and Joseph Smethurst, Her special license that we, the
said Hamilton Martin and Joseph Smethurst, our executors, administrators,
and assigns, or such others as we, the said Hamilton Martin and Joseph
Smethurst, our 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, exercisc,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF FENCES OR CASINGS FOR SHAFTS, PULLEYS, AND OTHER PARTS OF
MACHINERY," upon the condition (amongst others) that we, the said Hamilton
Martin and Joseph Smethurst, by an instrument in writing under our hands
and scals, or under the hand and seal of either of us, 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 we, the said Hamilton Martin and Joseph Smethurst,
do hereby declare the nature of our said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement (that is to say):-
The nature of our said Invention of Improvements in the Construction of
Fences or Casings for Shafts, Pulleys, and other Parts of Machinery, consists
in making such fences or casings of semicircular troughs, to which discs or
semi-discs are attached for closing the ends of the drums or wheels fixed on
the shafts to which such fences or casings are applied.
And in order that our Invention may be fully understood and readily carried
into effect, we will proceed to describe the means pursued by us, reference
being had to the accompanying Sheet of Drawings, and to the letters and
figures marked thereon.

page_text: DESCRIPTION OF THE DRAWING.
Fig. 1 is a side view of a line shaft, shewing our improved fence or casing
in section; Fig. 2 is a side view of the same; and Fig. 3 is a transverse
section. In these views, a is a shaft, supported in the bearings b, b; c is a
coupling, and d, d, driving pulleys or drums of the usual construction. The
fence or casing for the plain part of the shaft is marked e, e; it consists of two
semicircular troughs, supported at each bearing by the bridles f, and supported
at suitable intervals by stays attached to the beams, as shewn at g. The fence
or casing is enlarged at h for the coupling c, and the ends of the pulleys or
drums & are closed or partially closed by means of the discs i, fitting on and
holding together the ends of the semicircular troughs e, e; these discs may
also be cast to the ends of the troughs and secured together by hooks. Wo
prefer to make these fences or casings of cast iron, but other metal or material
may be used. It will be evident, from the foregoing description and the
Drawing, that if a strap should fall from one of the pulleys it will drop on to
the casing, which, being stationary, entirely prevents any accident from the
lapping thereof round the shaft. The strap is also protected from becoming
entangled in the spokes of the pulley or drum, and from the ends of keys which
hold the pulley or drum on the shaft by the discs i. The sides of spur or
bevel wheels may in like manner be fenced or cased up by discs similar to those
marked i.
Having thus described the nature of our Invention, and the manner of per-
forming the same, we wish it to be understood that we do not claim the
fencing or casing of shafts with two semicircular troughs, as such fences
or cases have before been made; but that which we do claim is, the discs
marked i for closing the ends of drums, pulleys, or wheels, and the improve-
ments in connecting and supporting the fences or casings, as described.
In witness whereof, we, the said Hamilton Martin and Joseph Smethurst,
have hereunto set our hands and seals, this Twenty-fourth day of
August, in the year of our Lord One thousand eight hundred and
Gift Give
Witness,
H. B. BARLOW,
Manchester.
HAMILTON MARTIN. (L.S.)
JOS SMETHURST.
(L.S.)