Improvements in Cranes and Sheer Legs.
Year: 1898

page_text: Improvements in Cranes and Sheer Legs.
HARRY JOHN LINE, of 179, Radcliffe Road, Northam, Southampton, Trade
Engineer, and WILLIAM GOSLING, of 130, Radcliffe Road, Northam, Southampton,
Trade Engineer, do hereby declare the nature of this invention to be as follows:--
An improved method of working legs of sheers, and jibs of cranes, in and
out by having bottom end of back leg of sheers, or jib of cranes, to work on a
radius.
In accompanying drawings. Fig. 1 is showing our invention as applied
to sheer legs.
Fig. 2 gives an idea of the kind of machinary that we may use for the purpose
of our invention, but we also claim that we may use machinary or different
construction and design to that shown on drawing, so long as we work C on a
radius causing load to travel to D2, or, D2, to D
Fig 3 18 showing how our invention may be applied to cranes
•
A is a constant or fixed centre, and a given distance from A in proportion to
the distance the load is required to travel will be a movable centre B to which
the lower end of back leg of sheers, or back guy, or stay, of crane jib, C will be
connected.
B, with C connected, to work over to the right, or under to the left, on a
radius to B2, working on A as a centre, causing load D, to travel from D, to D2,
and top end of legs, or jib, from E to E2
F is a centre on which the bottom end of front legs of sheers or jib of crane
will work, in the usual way.
Like letters indicate corresponding parts throughout the drawings.
We, HARRY JOHN LINE, of 179, Radcliffe Road, Northam, Southampton, Trade
Engineer, and WILLIAM GOSLING, of 130, Radcliffe Road, Northam, Southampton,
Trade 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 solates to the traversing mation of annamates for misunn

page_text: and traversing loads known as "sheers ΟΙ
01
"sheer legs
crane jibs, and
has for its object to economise space by shortening or entirely dispensing with
the inward movement of the back leg or member when the "sheer legs" or
"Jib" is moved inward
"
<
Our invention consists in obtaining the traveising movement of the "sheer
lege or crane jib" by causing the back leg or member or the jib guy to
work on a radius by connecting the back leg or member or guy to a wheel or
radial bar revolving on working on a fixed centre whereby although the arc of
travel of the sheel legs
or Jib" 18 large the relative in and out movement
of the back leg or member 18 small
در
In the accompanying drawings we have shown by way of diagram, in Figure 1
our invention as applied to "sheer legs," in Figure 2 a means or apparatus which
may be employed in the carrying out of our invention, in Figure 3 our invention
as applied to cranes In the diawings like letters and figures of reference denote
like or corresponding parts, and correspond with those used in the following
explanation.
"
With reference to the drawings H designates the front legs working on the
centre I fitted in the usual way, and C denotes the back leg of a sheers," K 18
the lifting chain, and D is the load, A denotes a constant or fixed centre; at
the back of the "sheers" at a given distance from this constant centre A pro-
portioned in relation to the distance the load D is required to travel inward
we provide a movable centre B which we obtain by means of a wheel, radius
rod, or the like having its centie at A, to this movable centre B we connect the
lower end of the back leg C of the "sheers," or the back guy or stay C of the
crane jib" H so that it will work over to the right, or under to the left in
the direction of the arrows shown in Figure 1. In the case of light "sheels"
"
cranes it may work 11ght round in which case the machine or engine always
runs one way for raising and lowering, working on the constant centre A and
bringing the "sheer legs" 01 "Jib Hover into the position shown in dotted
lines, and causing the sheer legs
to travel from E to E3 and the load D to
"
travel from D to D³.
"
"
or
To traverse the load by moving the lower end of the back leg or member C
on a radius and according to our invention any suitable mechanism may be used,
for example, the lower end of the back leg C of the "sheers"
on the back guy C
of the crane jib" may be attached to a worm-wheel near the perphey as shown
in Figure 2 in which M denotes the worm-wheel and M¹ the worm by which
it is evolved, the traveising of the "sheers" ог ciane jib" being caused by
moving the lower end of the member C by means of the worm-wheel from the
point B to the point B. The mechanism M, M' may be placed partly or entirely
underground so as to give little or no obstruction.
<<
The part marked L L on the drawing Figure 2 denotes the ground space saved
by using our improved apparatus
We would have it understood that we do not confine ourselves to any particular
means or machinery for moving the member C as machinery of various different
construction and design may be used, the essential feature under our invention
being that the end of the member C 18 moved on a radius from a fixed centre
to give the traversing motion to the "sheers or crane jib'
"
"
"
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that
what we claim 18.-
1. Effecting the inward and outward traversing motion of apparatus for raising,
lowering, and traversing loads known as
"
sheer legs and
crane jibs" by
6.
"
2
"
"
connecting the lower end of the back leg of the sheers or the guy of the
crane jib" to a device such as a wheel or arm having radial or rotary movement
on a constant or fixed centre as set forth.
2 The means substantially herein described by which inward and outward

page_text: motion is imparted to apparatus for raising, and lowering, and traversing loads
as set forth.
3 The means for imparting inward and outward motion to apparatus for
raising, and lowering, and traversing loads, constructed, and arranged to act
substantially in the manner, and for the purposes hereinbefore described with
reference to the drawings hereto annexed
A day
Augus
FREDERICK J. CHEESBROUGH, (Fel. Chart. Inst. PA.,
Grant & Maddison's Bank Buildings, Canute Road, Southampton,
Applicants' Agent.