Improvements in Oranes.
Year: 1894

page_text: Date of Application, 12th Apr., 1894
Complete Specification Left, 11th Feb., 1895-Accepted, 30th Mar., 1895
I, RICHARD THOMAS BURY, of Hill Top Iron Works, Burnley, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
In order to obviate the danger which at present exists in working loose-jib-
cranes, and which arises through carelessly or inadvertently throwing them out of
gear when the catch or paul which engages with the barrel-wheel is withdrawn,
causing the loose jib to fall, I attach to, or near the extremity of the catch-
rod, which penetrates the clutch lever-bracket, a slide box, which, by the act
of lifting the catch-rod to disengage the catch or paul from the barrel-wheel,
is placed in the way of the clutch lever and prevents it being actuated.
A finger penetrates an eye in the framework, and to facilitate an easy sliding
motion, either the finger or the eye is provided with a key or key-bed.
This finger is surrounded at its leading or projection extremity, with a coil
spring.
Before the crane can be thrown out of gear the finger must be withdrawn, when,
the slide-box will immediately fall, and in doing so actuates the catch rod causing
the paul to re-engage in the barrel-wheel, and prevent any possibility of the
loose jib falling, when not intended.
When the finger has been withdrawn the spring is contracted but when the
crane is in gear, and the slide box in its upper position, and the paul or catch
disengaged from the barrel-wheel, the coil spring expands and shoots the finger
underneath the slide-box, and supports it.
n
117
CA1 1004
JAS. T. PEARSON,
Agent for Applicant.
Improvements in Oranes.
I, RICHARD THOMAS BURY, of Hill Top Iron Works, Burnley, in the County
of Lancaster, 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 :-
In order to obviate the danger which at present exists in working loose-jib-
cranes, and which arises through carelessly or inadvertently throwing them out of
gear, when the catch or paul which engages with the catch or barrel-wheel, is
withdrawn, causing the loose jib to fall, I attach to or near the extremity of the
catch-rod, which penetrates the clutch-lever-bracket, a slide box, which, by the act
of lifting the catch-rod, to disengage the catch or paul from the barrel-wheel, is
placed in the way of the clutch-lever, and prevents it being actuated.
A finger penetrates an eye in the framework, and to facilitate an easy sliding
motion, either the finger or the eye is provided with a key or key-bed.

page_text: The slide-box is shewn in all the figures and consists of a rectangular frame or
case loosely supported by the projecting arm (5) and penetrated by the slide-rod (8)
to which it is firmly attached.
The box is also provided with a spring (1) and catch 4 to hold it in position
when raised.
In order to put the crane, with these improvements attached, in gear, the slide-
box (2) is lifted (by hand) to the position shewn in Figs. 2, 3, 4, and at G, in
Fig. 5 a blade-spring (1) is forced back, as at C, Fig. 3, and recoils and resumes
its normal position, close to the slide-box (2) as soon as the latter is raised
sufficiently high, as to enable the catch (4) to be clear of the supporting arm (5)
Figs. 2, 3, 4, and at I Fig. 5.
The catch (4) is now resting on the arm, (5) as at D, Figs. 2 & 3, and at I
Fig. 5, thereby supporting the slide-box (2) in an elevated position, and lifting the
catch or paul (6) clear of the catch or barrel-wheel (10).
To throw the crane out of gear, without letting down or lowering the jib; the
blade-spring (1) Figs. 1 to 5, must be pulled back till the point of the catch (4) is
beyond the edge of the supporting arm (5) when the slide-box (2) will immediately
fall, and in doing so, actuates the slide-rod (8), causing the paul (6) to re-engage
in the catch or barrel-wheel (10) and prevent any possibility of the loose-jib
falling (the catch or barrel-wheel (10) and the jib-barrel (11) being keyed
together).
To obviate the paul (6) being lifted from off the catch or barrel-wheel (10)
while the crane is out of gear, one end of the handle (12) which operates the
clutch-lever (13), is of such a length and shape as to rest on, or cover the supporting
arm (5), so that when the clutch (14) is disconnected from the barrel-wheel (10), it
automatically locks the slide-box (2), as shewn in Figs. 2 to 5.
The arrangement above described applies to hand cranes.
When the improvements are applied to steam cranes, the blade-spring (1),
catch (4) and handle (12), Figs. to 6, are done away with, the slide-box (2)
is reversed, or turned round, on the supporting-arm (5); the handle (12) is
substituted by a rod (3) (shewn at E Fig. 5. in dotted lines), which is fastened
to the clutch lever (13) aud which projects or extends over the slide-box in the
manner shewn in Figs. 5, 6 & 7.
Having dispensed with the blade-spring (1) catch (4), and handle (12), the
slide-box (2) and the slide-rod (8) have to be held (by hand) in the position shewn
at F. Figs. 5 & 6, (in dotted lines) with the paul (6) clear of the catch or barrel-
wheel (10) for which purpose a handle (15) is provided.
Instead of having two barrels on separate shafts (as is the case on ordinary

page_text: cranes) I mount them both on one, as shewn at H, Fig. 1,-the loose barrel being
marked (11) and the fixed barrel (7).
At the clutch-box end of shaft H, the clutch (14) slides on the fast key (16)
fixed to shaft H, and engages with the claws (17) cast on the catch or barrel-
wheel (14) coupling both the jib-barrel (11) and hoisting barrel (7) together.
The hoisting barrel (7) has the winding rope attached at one side, and the
barrel (11) at the other, or opposite side, thus the weight being lifted, helps or
assists in turning the jib-barrel (11) when coupled or in gear with the barrel (7).
Having now particularly described and ascertained the nature of my said inven-
tion, I declare that what I claim is :-
:-
(1.) The slide-box (2), slide-rod (8) catch or paul (6) and blade-spring (1) and
supporting arm (5) as shewn in Figs. 1 & 5.
(2.) The slide-box (2), supporting arm (5), and rod (3) as shewn in Figs. 5,
6 & 7.
(3.) The combination of the parts indicated in Claim 1 with the fast and loose
barrels (7) and (11) shewn in Fig. 1.
(4.) The combination of the parts indicated in Claim (2) with the fast and loose
barrels (7) and (11) Fig. 1.
(5.) The general combination of the arrangements illustrated by the drawings,
and substantially as, hereinbefore described for the purpose specified.
Dated this 9th day of February 1895.
JAS. T. PEARSUN,
Agent for Applicant.