IMPROVEMENTS IN THE CONSTRUCTION OF CRANES AND OTHER MACHINES FOR RAISING HEAVY BODIES
Year: 1853

page_text: LETTERS PATENT to Ezra Washington Burrows, of Pentonville, in
the County of Middlesex, Civil Engineer, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION OF CRANES AND OTHER MACHINES
FOR RAISING HEAVY BODIES."
Sealed the 28th February 1854, and dated the 31st August 1853.
PROVISIONAL SPECIFICATION left by the said Ezra Washington
Burrows at the Office of the Commissioners of Patents, with his
Petition, on the 31st August 1853.
I, EZRA WASHINGTON BURROWS, of Pentonville, in the County of
Middlesex, Civil Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF CRANES AND OTHER
MACHINES FOR RAISING HEAVY BODIES" to be as follows:-
My Invention relates to a peculiar mode of obtaining and retaining
an operating pressure effected by a novel arrangement of the wheels or ⚫
drums of cranes, crabs, and other like machinery, whereby I dispense
with the necessity of the usual break, causing the body to be raised to
be equably balanced, and thereby offering greater facilities than by the
ordinary methods of raising or lowering weights.
And for the better understanding of my said Invention I will now
proceed to describe the Drawing hereunto annexed, reference being had
to the letters and figures marked, thereon. Fig. 1, is a side view of
S

page_text: the wheels or drums of a crane arranged agreeable to my improved
construction of such machinery. A, is the main drum wheel keyed on
the axle B, carrying also the lesser drum wheel C. On the axle B,
and behind the wheel A, hangs an iron link shown by the dotted
lines D, from which is suspended the rope E, having the weight slung
by a block at E, and the rope then passes up at F, over a pulley
behind A, corresponding in dimensions to the pulley C, and the rope
then takes the direction of F", towards the lower part of the drum
G, G, on which it is finally wound. These drum wheels are put in
motion by the drum wheel I, actuated by the crank I'. I also provide
an endless band or hoop lever J, J, upon which rolls the weight K,
whilst the crane is being used.
I would here observe, that taking the horizontal line L, L, I re-
commend the axles of the wheels A, and H, to be on this level, but
the wheel I, to be considerably below I, I, as here shown, so that the
three wheels A, H, and I, being of equal diameter, the periphery of I,
shall touch the horizontal line L, L, affording the angle M, M, taken
through the point of contact between between I, and A, and between
C, and H.
I wish it to be understood that I do not limit myself to this par-
ticular arrangement, which, however, sufficiently explains the principle
of my Invention, and which I consider may be modified considerably;
neither do 1 confine myself to any particular dimensions, materials, or
number of drum wheels; but what I do claim as my Invention is,
namely The arranging of wheels or drums so that the same shail
either balance or assist in the raising and lowering of heavy bodies in
the manner described.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Ezra Washington Burrows in the Great Seal
Patent Office on the 28th February 1854.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of August, in the
year of our Lord One thousand cight hundred and fifty-three, in the
seventeenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Ezra Washington Burrows, Her
special licence that I, the said Ezra Washington Burrows, my execu-
tors, administrators, and assigns, or such others as I, the said Ezra
Washington Burrows, 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 "IMPROVEMENTS IN THE CONSTRUCTION OF CRANES AND OTHER
MACHINES FOR RAISING HEAVY BODIES," upon the condition (amongst
others) that T, the said Ezra Washington Burrows, by an instrument
in writing under my hand and seal, 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 Ezra Washington Burrows, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, reference being had to the
Drawings hereunto annexed (that is to say):
My said Invention relates to a peculiar mode of obtaining and
retaining an operating pressure effected by a novel arrangement of the
wheels or drums of cranes, crabs, and other like machinery, whereby I
dispense with the necessity of the usual break, causing the body to be
raised to be equally balanced, and thereby offering greater facilitics
than by the ordinary methods of raising or lowering weights.
And for the better understanding of my said Invention I will now
proceed to describe the Drawing hereunto annexed, reference being
had to the letters and figures marked thereon. Fig. 1, is a side view
of the wheels or drums of a crane arranged agreeable to my improved

page_text: construction of such machinery. A, is the main drum wheel keyed
on the axle B, carrying also a lesser drum wheel. On the axle B, and
behind the wheel A, hangs an iron link shown by the lines D, from
which is suspended the rope E, having the weight slung by a block
at E, and the rope then passes up at F, over a pulley A', behind A,
marked C, and the rope then takes the direction of F, towards the
lower part of the drumm G, G, on which it is finally wound; or D, may
hang on the axle B. These drum wheels are put in motion by the
drum wheel I, actuated by the crank I. I also provide an endless
band on hoop lever J, J, upon which rolls the weight K, or K', whilst
the crane is being used.
I would here observe, that taking the horizontal line L, L, I re-
commend the axles of the wheels A, and H, to be on this level, but
the wheel I, to be considerably below L, L, as here shown, so that
the 3 wheels A, H, and I, being of equal diameter, the periphery of I,
shall touch the horizontal line L, L, affording the angle M, M, taken
through the point of contact between I, and A, and between C, and H.
. I wish it to be understood that I do not limit myself to this par-
ticular arrangement, which, however, sufficiently explains the principle
of my Invention, and which I consider may be modified considerably;
neither do I confine myself to any particular dimensions, materials, or
number of drum wheels; but what I do claim as my Invention is,
namely The arranging of wheels or drums so that the same shall
either balance or assist in the raising and lowering of heavy bodies in
the manner described.
In witness whereof, I, the said Ezra Washington Burrows, have
hereunto set my hand and scal, this Twenty-eighth day of
February, in the year of our Lord One thousand eight hundred
and fifty-four.