IMPROVEMENTS IN SCREW JACKS
Year: 1853

page_text: LETTERS PATENT to George England, of Hatcham Iron Works,
New Cross, in the County of Surrey, Engineer, for the Iuvention
of "IMPROVEMENTS IN SCREW JACKS."
aled the 3rd November 1858, and dated the 7th May 1853.
PROVISIONAL SPECIFICATION left by the said George England at
the Office of the Commissioners of Patents, with his Petition, on
the 7th May 1853.
I, GEORGE ENGLAND, of Hatcham Iron Works, New Cross, in the
County of Surrey, Engineer, do hereby declare the nature of the said
Invention for IMPROVEMENTS IN SCREW JACKS " to be as follows:-
This Invention relates to an improved construction of traversing and
clevating screw jacks, and consists in actuating the elevating screws of
such screw jacks by means of combined bevil and spur gearing.
To effect this object a bevil wheel is formed upon the actuating nut,
which wheel is acted upon by a second wheel. This second bevil
wheel has a spur wheel formed upon it. A spur pinion is made to
gear with the spur wheel, and is employed when great power is required.
The actuating winch handle may be fitted either on to the arbor of the

page_text: second bevil wheel when a quick motion is required, or on to the arbor
of the small spur pinion when it is desired to obtain a powerful lift.
The jack is traversed laterally by a horizontal screw, or by a rack and
pinion acted on by a ratchet wheel.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George England in the Great Seal Patent
Office, on the 7th November 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
GEORGE ENGLAND, of Hatcham Iron Works, New Cross, in the County
of Surrey, Engincer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of May, in the year of
our Lord One thousand eight hundred and fifty-three, in the sixteenth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said George England, Her special license that I',
the said George England, my executors, administrators, and assigns,
or such others as I, the said George England, my executors, admi-
nistrators, 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 SCREW
JACKS," upon the condition (amongst others) that I, the said George
England, 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 George England, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying

page_text: Drawings, and to the letters and figures marked thereon, that is to
say:
.
My said Invention relates to an improved construction of traversing
and elevating screw jacks, and consists in actuating the elevating
screws of such screw jacks by means of combined level and spur.
gearing. To effect this object a bevel wheel is formed upon the
actuating nut, which wheel is. acted on by a second wheel. This
second bevel wheel has a spur wheel formed upon it: a spur pinion is
made to gear with the spur wheel, and is employed when great power is
required. The actuating winch handle may be fitted either on to the
arbor of the second bevel wheel when a quick motion is required, or on
to the arbor of the small spur pinion when it is desired to obtain a
powerful lift. The jack is traversed laterally by a horizontal screw, or
by a rack and pinion acted on by a ratchet handle. Figure 1, of the
accompanying Drawings' is a side elevation of the improved jack.
Figure 2, is a transverse vertical section of the same, and Figure 3,
represents a partial plan of the jack. A, is a wrought iron bed plate,
with a raised portion B, forged upon it. The barrel C, of the jack is
secured to the horizontal sliding brass D, by the angle iron E, which.is
rivetted to it. The sliding brass D, has two projecting lugs F, F,
formed upon its under side, which act as traversing nuts to the horizontal
screw G; which is forged with square ends H, H, for the reception of a
ratchet handle. This screw rests in the ends of the raised portion B,
of the bed plate, and gives the requisite horizontal traverse to the body
of the jack. The elevating screw I, is contained inside the barrel C,
and has a claw J, forged on to its lower extremity. The actuating nut
K, of this screw is formed in one piece with the bevel wheel L, and
works freely in the upper portion of the barrel C, which has a collar
at M, forged upon it to support the nut. The horizontal bevel wheel L,
is actuated by the compound bevel and spur wheel N, the arbor or
spindle O, of which runs in the wrought iron bracket P, which is
screwed at Q, to the side of the barrel C, its upper portion being sup-
ported by the piece R, to which it is bolted at S, and which is fitted
loosely over the collar of the elevating screw I. The inner end of the
arbor works in the side of the barrel, and projects into a groove in the

page_text: nut K, thereby holding it in its place. The wheel N, is driven by a
spur pinion T, the arbor U, of which works in the bracket P, and in a
boss on the side of the barrel C. The horizontal traversing motion is
given by a ratchet handle, as before described, which is fitted on to one
of the square ends of the screw G. When a powerful lift is required
an actuating handle is fitted to the square end of the arbor U, the
motion being transmitted from the pinion T, through the compound
bevel and spur wheel N, and thence to the bevel wheel and nut L, and
K. Should a quick motion be required, the handle is fixed to the
arbor of the compound wheel N, when the speed will be increased in
proportion to the difference between the diameters of the wheel N, and
pinion T.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe, in conclusion, that I do not confine
or restrict myself to the precise details or arrangements which I have
had occasion to describe or refer to, as many variations may be made
therefrom without deviating from the principles or main features of my
Invention; but what I consider to be novel and original, and therefore
claim as the Invention secured to me by the hercin-before in part
recited Letters Patent, is,
The peculiar arrangement herein-before described for obtaining
either a quick or slow motion in screw jacks both vertically and
laterally.
In witness whereof, I, the said George England, have hereunto
set my hand and scal, the Seventh day of November, One
thousand eight hundred and fifty-throo
G. ENGLAND. (L.S.)