Year: 1898

page_text: I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, 118, New Street, Birmingham, in the County of
Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to a lifting device, formed by the combination of mostly
known means, obtaining a peculiar result, and comprising the use of so called
lazy tongs fixed at suitable points in combination with a peculiarly shaped screw,
in which lifting device the power and extent of travel are proportionate as opposed
to the lazy tongs hitherto employed for various purposes.
In the accompanying drawings, Figures 1-6 show this apparatus in various
views, in which,
Figure 1 shows the construction of a lazy tongs;
Figure 2 is a plan view of the whole apparatus;
Figure 3 an elevation;
Figure 4 a separate view of the lazy tongs extended;
Figure 5a view of the screw;
Figure 6 a detail;
Figure 7 is a view of the apparatus as a whole.
If lazy tongs composed of bars f and g. Figure 1, are fastened at the point e
and power be applied to the end points a and b of the bars, they will approach
one another in the direction of the horizontal arrows in a straight line. Simul-
taneously the other end points of the bars and will approach one another in
the same proportion but will also rise vertically in the direction indicated by the
arrows. This latter movement is useful in the present instance. The ordinary
construction of lazy tongs however requires that the course of the points a and b
shall be always in a varying proportion to the vertical movements of the points c
and d. Whilst for instance in the position of the lazy tongs shown in Figure 1,
the points and make little movement, the points and lift or .rise almost
9 to 10 fold. In the position of the lazy tongs shown in Figure 4 this proportion
is reversed. Here the points a¹ and make a greater movement whilst the.
points and proportionately rise very little.
In the same proportion as the said distances travelled vary, the power necessary
for moving the lazy tongs will correspondingly increase or diminish. As how-
ever in practice in lifting mechanisms the points c and d, Figure 1, or cand
Figure 4, must move at an equal speed the points a and b and a and b, Figure 4,
must compulsorily follow an unequal movement. In order to attain this, the end
points of the bars f and g², f³ and g³ are as shown in Figure 2 connected each
by a common bark and respectively.
The lifting ends of the rods of the lifting mechanism are provided with
rollers m, m2 m³ m², m² m² m² ms to allow of their being better adjusted.
The connecting bars and have each in the centre a nut n¹² respectively formed

page_text: as a bearing through which there passes a screwed spindler having a right and
left hand thread. This screw is connected with a driving gear o and p and with
a crank in order to obtain a greater ratio of transfer for the said screwed
spindle r. Said spindler is shown separately in Figure 5. The pitch of the
screw as will be seen from this figure is not a regular one but increases or
diminishes as the case may be from spiral to spiral. By this means the result
is attained that with an even rotation of the crank the rising of the lifting
mechanism is exactly proportionate and also that the proportions of power remain
always proportionate because the angles which the bars and g form relatively
to the screw thread of the spindle are always equal, although the spindle is of
varying pitch, because the bars 2 and constantly assume a different position.
The hitting mechanism as a whole consists of four lazy tongs A B C D, and in
order to render the whole lifting mechanism stable several corresponding points
of the tongs are connected by rings s and s. The lifting mechanism has at top
a podium E on which loads or persons may be raised or lowered. As the two lazy
tongs B and D are connected by a spindle it is necessary that the lazy tongs A and B
should be connected with this spindle. This takes place in the following manner.
Wire ropes are attached to projections 22, which ropes travel over
rollers to the connecting rods k and at the points ww. Thus all four
lazy tongs effect the same work.
In order to allow of this lifting mechanism being easily conveyed, or rendered
casily portable, it is mounted on wheels yyy³.
This lifting mechanism has the advantage over other lifting mechanisms that
it may be folded into a small space and may be raised or stretched upwards to
from 10 to 15 times the height that it occupies when in a folded position, and also
that the safety is almost unlimited as the whole construction is in itself stable.
It is peculiarly suitable for lifting heavy loads, for examining and checking
buildings, for installations, and particularly for warlike purposes, for the rapid
formation of outlook scaffolds of warships, for employing search lights at
desired height, and the like.
Dated this 19th day of Jul 1808
any
W. P. THOMPSON & Co.,
Agents.
An improved Liting Apparatus.
A communication by FRITZ NACK, of 33, Obere Baustrasse, Nuremberg, in the
Empire of Germany, Merchant.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, 118, New Street, Birmingham, in the County of
Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to a lifting device, formed by the combination of mostly
known means, obtaining a peculiar result, and comprising the use of so called
lazy tongs fixed at suitable points in combination with a peculiarly shaped screw,
in which lifting device the power and extent of travel are proportionate as opposed
to the lazy tongs hitherto employed for various purposes.

page_text: In the drawings accompanying the Provisional Specification, Figures 1-5
show this apparatus in various views, in which,
Figure 1 shows the construction of a lazy tougs;
Figure 2 is a plan view of the whole apparatus ;
Figure 3, an elevation;
Figure 4, a separate view of the lazy tongs extended;
Figure 5, a view of the screw;
Figure 6, a detail;
Figure 7, a view of the apparatus as a whole.
If lazy tongs composed of bars f and g, Figure 1, are fastened at the point e
and power be applied to the end points a and b of the bars, they will approach
one another in the direction of the horizontal arrows in a straight line. Simul-
taneously the other end points of the bars and i will approach one another in
the same proportion but will also rise vertically in the direction indicated by the
arrows. This latter movement is useful in the present instance. The ordinary
construction of lazy tongs however requires that the course of the points a and b
shall be always in a varying proportion to the vertical movements of the points c
and d. Whilst for instance in the position of the lazy tongs shown in Figure 1,
the points a and make little movement, the points c and d lift or rise almost
9 to 10 fold. In the position of the lazy tongs shown in Figure 4 this proportion
is reversed. Here the points a¹ and 6 make a greater movement whilst the
points and proportionately rise very little.
In the same proportion as the said distances travelled vary, the power necessary
for moving the lazy tongs will correspondingly increase or diminish. As how-
ever in practice in lifting mechanisms the points c and d, Figure 1, or c¹ and
Figure 4, must move at an equal speed the points a and b and a¹ and b', Figure 4,
must compulsorily follow an unequal movement. In order to attain this, the end
points of the bars f and g², f and are as shown in Figure 2 connected each
by a common bark and respectively.
r
The lifting ends of the rods of the lifting mechanism are provided with
rollers m¹, m² m² m² m² m² m² m to allow of their being better adjusted.
The connecting bars k and have each in the centre a nut n¹² respectively formed
as a bearing through which there passes a screwed spindle having a right and
left hand thread This screw r is connected with a driving gear o and p and with
a crank in order to obtain a greater ratio of transfer for the said screwed
spindle r Said spindler is shown separately in Figure 5. The pitch of the
screw as will be seen from this figure is not a regular one but increases or
diminishes as the case may be from spiral to spiral. By this means the result
is attained that with an even rotation of the crank the rising of the lifting
mechanism is exactly proportionate and also that the proportions of power always
remain proportionate because the angles which the bars and g² form relatively
to the screw thread of the spindle r are always equal, although the spindle is of
varying pitch because the bars 2 and g² constantly assume a different position.
The lifting mechanism as a whole consists of four lazy tongs A B C D and in
order to render the whole lifting mechanism stable several corresponding points
of the tongs are connected by rings s and s. The lifting mechanism has at top
a podium E on which loads or persons may be raised or lowered. As the two lazy
tongs B and D are connected by a spindle it is necessary that the lazy tongs A and B
should be connected with this spindle. This takes place in the following manner.
Wire ropes are attached to projections, which ropes travel over
rollers to the connecting rods and at the points w¹. Thus all four
lazy tongs effect the same work.
In order to allow of this lifting mechanism being easily conveyed, or rendered
easily portable, it is mounted on wheels y1 y2 y³.
This lifting mechanism has the advantage over other lifting mechanisms that
it may be folded into a small space and may be raised or stretched upwards to
from 10 to 15 times the height that it occupies when in a folded position, and also

page_text: that the safety is almost unlimited as the whole construction is in itself stable.
It is peculiarly suitable for lifting heavy loads, for examining and checking
buildings, for installations, and particularly for warlike purposes, for the rapid
formation of outlook scaffolds of warships, for employing search lights at any
desired height, and the like.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is;
-
"
A lifting apparatus characterised by the combination of several "lazy tongs"
which may be contracted or expanded by means of a suitable operating mechanism
whereby the podium connected therewith may be lowered or raised substantially
as described.