Improvements in Machine Gearing.
Year: 1899

page_text: Date of Application, 30th Mar., 1899
Complete Specification Left, 30th Jan., 1900-Accepted, 3rd Mar.,
1900
PROVISIONAL, SPECIFICATION.
Improvements in Machine Gearing.
We, JOHN CHARLES HOWELL, of 24, Queen Victoria Street, in the City of
London, Electrical Engineer, THOMAS HUMPAGE, of Luckwell Works, Ashton
Gate, Bristol, Engineer, and HERBERT INNES JACQUES, of Luckwell Works,
Ashton Gate, Bristol, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to gearing for driving various classes of machines,
and in order that the nature of the invention may be understood it will be
described as applied to a travelling overhead crane, and from this its adaptation
to other classes of cranes or machines will be obvious.
When using an electric motor for crane work it is of course necessary to use
differential gear as the revolutions of the motor shaft are much too rapid for
crane work.
According to this invention it is proposed that where a high speed motor is
employed differential gear and preferably the gear described in Specification 20,542
of 1892 or equally effective gear shall be employed. Where this is the case
upon the differential gear driven shaft are loosely mounted two bevel wheels,
on said shaft are also two reversed claw clutches carried by feathers and capable
of being moved into contact with one or other of the bevel gear as may be
desired, thus causing such bevel gear to impart motion in either direction to a
third bevel gear with which they engage, and from which motion is imparted
to the travelling carriage.
Also loosely mounted on the differential gear driven shaft are two further
bevel wheels geared into a further wheel which drives or operates the winding
drum. These two bevel gears are also provided with clutches in order that the
motion of the drum wheel may be reversed from time to time, and finally said
shaft carries two further loosely mounted bevel wheels and reverse clutches,
the wheels gearing into or driving the drum carrying the endless rope or chain
to the jenny in a manner well understood.
All these gears can be enclosed in protecting cases so that the attendant in
charge of the machine is less liable to accident.
These gear cases can also be arranged to act as oil wells so that the gearing
may run in an oil bath thus reducing friction, wear and tear.
It will be seen that with this construction motion of the travelling carriage in
either direction may be obtained, winding or unwinding of the drum and move-
ment of the jenny in either direction may be secured.
Dated this 30th day of March 1899.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Chartered Patent Agent for the Applicants.

page_text: Improvements in Machine Gearing.
We, JOHN CHARLES HOWELL, of 24, Queen Victoria Street, in the City of
London, Electrical Engineer; THOMAS HUMPAGE, of Luckwell Works, Ashton
Gate, Bristol-Engineer, and HERBERT INNES JACQUES; of Luckwell Works,
Ashton Gate, Bristol, 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 gearing for driving various classes of machines
and in order that the nature of the invention may be understood it will be
described as applied to a travelling overhead crane, and from this its adaptation
to other classes of cranes or machines will be obvious. *
In order that the invention may be clearly understood reference is made to
the accompanying drawing in which Fig. 1 is an elevation of a part of an over-
head travelling crane mechanism containing the present invention, and Fig. 2
is a view showing the whole crane on a smaller scale.
When using an electric motor for crane work it is of course necessary to use
differential gear, as the revolutions of the motor shaft are much too rapid for
crane work.
According to this invention it is proposed that where a high speed motor is
employed in connection with gearing of the class dealt with herein, differential
gear, and preferably the gear described in Specification No. 20542 of 1892, or
equally effective gear, shall be employed. In the drawings such gear is enclosed
in a casing A and the motor is marked B. It consists of a bevel gear wheel 1
carried by the fast running shaft of the motor, a bevel gear wheel 2 loosely
mounted on a stud at an angle to said wheel 1 and gearing therewith and with a
gear 3 secured to the cover plate 4 of the gear casing A. The gear 2 carries a
gear 5 fixed to it or forming part of same and both run freely on the stud which
is in turn carried by a spindle 6 which can turn freely in the fast running shaft
and in the slow running shaft C which carries a bevel gear wheel 7 engaging
with the bevel gear 5. The wheels 5 and 2 are duplicated as shown to secure a
better balance for the gear. The casing and gear 3 are held against rotation
when the reduction gear is driving through gear 7 by means of a brake band 8
operated. by suitable levers 9, 9ª from a conveniently placed handle as shewn
in Fig. 2. When the brake is released, the gear 3 of the casing together with
the latter can revolve freely, so that the power is not transmitted if the load is
greater than the power of the brake, or if the latter is taken off.
Upon the differential gear driven shaft C are loosely mounted two bevel
wheels a b, on said shaft are also two reversed claw clutches c d carried by
feathers and capable of being moved into contact with one or other of the bevel
gear ab as may be desired, thus causing such bevel gear to impart motion in
either direction to a third bevel gear e with which they engage, and from which
motion is imparted to the travelling carriage.
•
Also loosely mounted on the differential gear driven shaft C are two further
bevel wheels f g geared into a further wheel D which drives or operates the
winding drum E. These two bevel gears f g are also provided with clutches hi
in order that the motion of the drum wheel E may be reversed from time to
time by causing clutches j k to engage with hi and finally said shaft C carries two
further loosely mounted bevel wheels Im and reverse clutches no capable of
engaging with clutches pq so as to drive gear F in either direction, said gear F
driving through other gears the drum carrying the endless rope or chain to
the jenny G (Fig. 2) in a manner well understood.
5

page_text: All these gears can be enclosed in protecting cases so that the attendant in
charge of the machine is less liable to accident.
These gear cases can also be arranged to act as oil wells so that the gearing
may run in an oil bath thus reducing friction, wear and tear.
It will be seen that with this construction motion of the travelling carriage in
either direction may be obtained, winding or unwinding of the drum and move-
ment of the jenny in either direction may be secured.
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 is:-
:—
1
J
11
All these gears can be enclosed in protecting cases so that the attendant in
charge of the machine is less liable to accident.
These gear cases can also be arranged to act as oil wells so that the gearing
may run in an oil bath thus reducing friction, wear and tear.
It will be seen that with this construction motion of the travelling carriage in
either direction may be obtained, winding or unwinding of the drum and move-
ment of the jenny in either direction may be secured.
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 is:
-
stantially as described.
the reduction gear with the clutch gearing all sub
2. The improved combination and arrangement of gearing substantially as
described and illustrated.
Dated the 27th day of January 1900.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicants.