IMPROVEMENTS IN Lifts OR ELEVATORS
Year: 1880

page_text: LETTERS PATENT to John Marsh Day, William Robert Green, and Henry
Claude Walker, all of Falmouth Road, Great Dover Street, London, in the
County of Surrey, Engineers, for an Invention of "IMPROVEMENTS IN Lifts
OR ELEVATORS."
PROVISIONAL SPECIFICATION left by the said John Marsh Day, William
Robert Green, and Henry Claude Walker at the Office of the Commissioners
of Patents on the 21st September 1880.
JOHN MARSH DAY, WILLIAM ROBERT GREEN, and HENRY CLAUDE WALKER,
all of Falmouth Road, Great Dover Street, London, in the County of Surrey,
Engineers. " IMPROVEMENTS IN LIFTS OR ELEVATORS."
Our Invention relates to certain improvements in that class of lifts or elevators
for passengers and goods in which a series of cages are continuously raised on one
side and lowered on the other, whereby we simplify the mechanism and render the
lift or elevator less liable to get out of order.
Our improvements will be best understood by reference to the accompanying
Sheet of Drawing, upon which
Figure 1 is a front view or elevation of a lift or elevator embodying our
improvements.
Figure 2, being a side view, and
Figure 3, a plan view of same, as seen from above.
A indicates the up shaft; B, the down shaft; C is the driving wheel for shaft A;
D, cross shaft; E, driving wheel for shaft B; F, wheel in gear with C; G, wheel
in gear with E; H, sprocket or chain wheel secured at top of shaft A; I, sprocket
or chain wheel at bottom of shaft A; K, sprocket or chain wheel at top of shaft B;
L, sprocket or chain wheel at bottom of shaft B; M, endless chain passing around

page_text: wheels H and I; N, endless chain passing around wheels K and L; O, up cage;
P, down cage; Q, Q, Q, guides for cages O and P; R, R, studs for attaching cages
to chains M and N.
The front of the cages O and P being hung to the chain N, whilst the back of
each cage is hung to the chain M, when the cage O reaches the top of the shaft it 5
is caused to travel in a lateral direction by the passage of the chain N around the
wheel K, thence down to the shaft B, and under the wheel L, to rise again in
the shaft A.
Two cages only are shown, but any number may be arranged.
When a slow motion or great power is required, we may substitute a worm wheel 1
gearing in lieu of the chain driving gear C, D, E, F, G.

page_text: chain S, when a cage C reaches the top of the shaft A, it is caused to travel (by
the chains R and S passing around the sprocket wheels N, O, and P, Q). in a
lateral direction, thenco down the shaft B and under the wheel Q, to rise again in
the up shaft A.
During the ascent and descent of the cages they are steadied and guided by
suitable upright or vertical guides T (secured on either side and midway between
the cages within the shaft or well), on either side of which guides slides an angle
iron frame E, or other suitable guide, secured around each cage. At the bottom or
underside of each cage this anglo iron frame or guide E is extended some short
distance below the floor of the cage, whereby provision is made for the rise and
fall of the cage during its lateral motion or passage from one shaft to the other,
and, further, as the cage never leaves the guide, it is by this arrangement firmly
guided and steadied throughout its journey.
Motion is imparted from the driving shaft F, through the pinions G and I,
to the upper sprocket wheels N and P, by means of the toothed wheels H
and K, L, M. These sprocket wheels, by their revolution, cause the chains R, S,
to be set in motion, carrying with them the cages C, C. An adjustable
frictional clutch F¹ is secured upon the shaft F, which may be driven direct from
an engine or other motive power, or by means of a band and pulley in the
ordinary manner, or worm wheel or frictional gearing might be substituted if
_required.
In the event of the chains breaking, becoming-damaged,-or-distended,_the_
lever Y, depressed by the-link-Z, causes-the-cord ✗_to_throw the belt or motive
power out of gear, thereby stopping the motion of the cage.
We are aware that it has been proposed to use two endless chains for carrying
the cages of elevators or lifts, and that special devices have been provided for
shifting the cages laterally, but our Invention differs therefrom particularly in the
arrangement of the chains and suspension of the cages, whereby we greatly simplify
the construction and working of elevators or lifts, and the passage of the cages from
one shaft to the other.
Having now described and ascertained the nature of our said Invention, and in
what manner the same is or may be performed,
We claim, as secured to us by the hereinbefore in part recited Letters Patent,-
Firstly. In an elevator or lift, the arrangement of the chains within the shaft,
substantially as herein before described and shewn in the Drawing.
Secondly. In an elevator or lift, having chains arranged according to this
Invention, the suspension of the cages to the chains, substantially as specified.
Thirdly. In an elevator or lift, the device consisting of the angle iron guides E,
in combination with the guide bars T, operating substantially as and for the purpose
herein before set forth.
In witness whereof, I, the said John Marsh Day, have hereunto set my hand
and seal, this Seventeenth day of March, in the year of our Lord One
thousand eight hundred and eighty one,
Witness,
ALFRED GRANT,
38, Johnson Street,
Westininster.
JOHN MARSH DAY. (L.S.)