Improvements in Machines for Moulding Bricks and the like.
Year: 1893

page_text: Date of Application, 5th Apr., 1893
Complete Specification Left, 5th Jan., 1894-Accepted, 10th Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements in Machines for Moulding Bricks and the like.
I, JOHN WILLIAM CRAVEN of Westgate Common Foundry, Wakefield in the
County of York, Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to machines wherein rotating mould tables are employed
and it has for its object to so give motion to the table that the moulding is effected
in a more efficient and perfect manner than hitherto. According to my invention
I effect the driving of the table in such a manner that the intermittent movements
thereof are effected comparatively slowly and with great power during the first
movement of the table to carry the filled moulds from under the pug mill and then
more quickly during the rest of the movement and then the movement of the gear
is accelerated prior to effecting the next movement of the table. The required
movements as described can be effected by elliptical gear which transmit the motion
to the tappet wheel by which the table is driven the longer and shorter axes or
radii of the elliptical gear being arranged relatively to the tappets which act on
the table so that the hereinbefore mentioned movements are obtained at the
requisite times. I prefer to arrange the gearing as follows. On the second motion
shaft of the machine I fix a bevel wheel which gears with another bevel wheel on
a vertical shaft which is provided with an elliptical wheel which gears with another
elliptical wheel on the shaft of the tappet wheel.
Dated this 5th day of April 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
Improvements in Machines for Moulding Bricks and the like.
1 JOHN WILLIAM CRAVEN of Westgate Common Foundry Wakefield in the
County of York 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 :-
My invention relates to machines wherein rotating mould tables are employed
and it has for its object to so give motion to the table that the moulding is effected
in a more efficient and perfect manner than hitherto. According to my invention
I effect the driving of the table in such a manner that the intermittent movements
thereof are effected comparatively slowly and with great power during the first
movement of the table, to carry the filled moulds from under the pug mill, and
then more quickly during the rest of the movement, and then the movement of the
gear is accelerated prior to effecting the next movement of the table. The required
movements as described can be effected by elliptical gear which transmit the motion
to the tappet wheel by which the table is driven the longer and shorter axes or
radii of the elliptical gear being arranged relatively to the tappets which act on
the table so that the herein before mentioned movements are obtained at the requisite
times. I prefer to arrange the gearing as follows and as shewn on the accom-
panying drawing Figure 1 of which is a sectional elevation and Figure 2 a plan of
so much of a machine as is necessary to illustrate my invention. On the second
motion shaft A of the machine I fix a bevel wheel a which gears with another

page_text: bevel wheel 6 on a vertical shaft B which is provided with an elliptical or
eccentrically mounted wheel 62 which gears with an elliptical wheel on the
shaft C of the tappet wheel c by which the table D carrying the moulds is operated
with variable intermittent movements as hereinbefore described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. In machines for moulding bricks and the like effecting the driving of the mould
table so that the intermittent movements are given thereto slowly in carrying the
filled moulds from under the pug mill and then more quickly during the rest of
the movement, the movement of the gear being accelerated prior to effecting the
next movement of the table substantially as hereinbefore explained.
2. In machines for moulding bricks or the like mounting the tappets which
operate the mould table upon a shaft which is operated by elliptical gear wheels
(or an elliptical wheel and an eccentric wheel) substantially as and for the purpose
hereinbefore described and illustrated by the accompanying drawings.
Dated this 5th day of January 1894.