Year: 1897

page_text: Date of Application, 3rd June, 1897--Accepted, 17th July, 1897
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to hoisting-cranes, and especially to that class possessing
a swinging jih, and is also applicable to roundabouts, and the object of it is to
construct the aforesaid in such a manner that only the swinging jib as a rule will
be subjected to a direct bending strain, whilst the post carrying the fulcrum, is
only intended to counteract a tensile strain or pull.
In the accompanying diagrams:-
Figure 1 is a diagram of a side view of my improved crane.
Figure 2 is a plan of Figure 1.
Figure 3 is a agram of a front view of my improved crane.
Figure 4 is a modified form of my improved crane.
Similar letters of reference denote the same parts throughout the views.
Upon a base of sufficient size and weight is fixed a vertical post S, around which
the other part of the crane can turn.
The moveable part consists of a girder U of suitable construction, which girder
acts as the jib and may be provided with rails upon which a crab of ordinary shape
can move along.
The jib is supported by means of a vertical stay F, the upper end of which is
attached to the jib. The lower end of the said stay F is provided with conical
rollers or wheels H, the axles of which. if produced or prolonged, would meet the
vertical post S. The rollers or wheels H move on rails fixed on the foundation and
forming a circular line having its centre in the axis of the post S. In the con-
struction shewn in the drawing, the crane may be used in the same manner as an
ordinary swinging crane.
As however the post S has only to counteract a tensile strain or pull, it need
not be attached so strongly to the foundation as is necessary with the ordinary
swinging jib cranes.
The post S may therefore, for instance, be only attached to a tank R of suitable
size, which tank, when the crane is to be used, is filled with the necessary ballast.
for instance, water.
In this manner a crane of comparatively easy movement and one capable of being
readily transported is obtained that may be conveniently employed almost any-
where and especially in the building of houses.
The track upon which the rollers or wheels H move need not be arranged on the
same level as the foundation, it may be arranged at a higher level on a suitable
strongly supported platform if and when desired.
In the modified construction, as shown in Figure 4 of the annexed drawings, the
ballast tank is arranged above the ground which makes the crane still more casy
of transport.

page_text: This invention when arranged as a swing crane is also applicable to a round-
about, in which case the passengers are placed in a gondola or other suitable riding
support suspended at the end of the, jib U, the said support being also if desired
caused to move up and down or rock simultaneously with the circular movement.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:
5.
1. A swinging crane having a vertical post and horizontal jib the latter being
made moveable round a fulcrum arranged in the post and supported by a stay resting
on rollers or wheels that move on a circular track arranged concentrically in
relation to the axis of the post, substantially as set forth..
2. In a swinging crane as indicated in Claim 1 hereof, the disposal of the post
alone or in conjunction with the rail track on a tank of sufficient size which tank
may be filled with the necessary ballast for the purpose of obtaining an easily trans-
portable crane, substantially as set forth..
3. A roundabout consisting of, a swinging crane having a vertical post and a
horizontal jib the latter being made moveable round a fulcrum arranged in the
post and supported by a stay resting on rollers or wheels that move on a circular
track arranged concentrically in relation to the axis of the post the end of the said
jib farthest from the fulcrum supporting a suspended gondola or other support for
a passenger.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.