IMPROVEMENTS IN APPARATUS FOR MOULDING AND CASTING AXLE BOXES OR BUSHES AND OTHER SIMILAR ARTICLES
Year: 1875

page_text: LETTERS PATENT to Richard Norfolk, of Beverley, in the County of
York, Engineer, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR MOULDING AND CASTING AXLE BOXES OR BUSHES AND OTHER SIMILAR
ARTICLES."
Sealed the 9th December 1875, and dated the 14th October 1875.
PROVISIONAL SPECIFICATION left by the said Richard Norfolk at
the Office of the Commissioners of Patents, with his Petition, on
the 14th October 1875.
I, RICHARD NORFOLK, of Beverley, in the County of York, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
APPARATUS FOR MOULDING AND CASTING AXLE BOXES OR BUSHES AND OTHER
SIMILAR ARTICLES," to be as follows:
The object of this Invention is,—
First. To facilitate the moulding and casting of axle boxes or bushes
and other similar articles.

page_text: articles are ready for use on leaving the sand, the screw being cast upon
them to receive the nut, thereby obviating the necessity of cutting the
screw in a lathe.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Norfolk in the Great Seal Patent Office
on the 2nd March 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
NORFOLK, of Beverley, in the County of York, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourteenth day of October, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Richard Norfolk, Her special
licence that I, the said Richard Norfolk, my executors, admini-
strators, and assigns, or such others as I, the said Richard Norfolk,
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN APPARATUS FOR MOULDING AND CASTING AXLE BOXES OR
BUSHES AND OTHER SIMILAR ARTICLES," upon the condition (amongst others)
that I, the said Richard Norfolk, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Richard Norfolk, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement (that is to say) :-
The nature of my Invention consists.-
First. In facilitating the moulding and casting of axle boxes or bushes

page_text: and other similar articles, whereby greater accuracy in the castings is
ensured than can be obtained by the usual method.
And, Secondly. In certain improvements in moulding and casting the
screw thread on axle boxes or bushes and other articles, and improve-
ments in apparatus for effecting the same.
And in order that my Invention may be fully understood and readily
carried into operation I will proceed to describe the accompanying Sheet
of Drawings, in which Fig. 1 is a vertical section of my improved
apparatus for moulding axle boxes or bushes; Fig. 2 is a plan; and
Fig. 3, a side elevation of the same; Figs. 4 to 11 are detached views of
parts of the apparatus.
The moulding box consists of three parts, namely, the bottom part a,
the middle part b, and the top piece c. The bottom part a contains
four turned recesses, the smallest of which marked a¹ forms a guide for
the lower end of the chill pin d, the second a² contains a core of sand,
which is prepared in a mould, shewn in Figs. 8 and 9. To prevent the
lower end of the axle box being hardened the third a³ contains the
screw core, shewn in Figs. 4 and 5, or a plain corc, as shewn in Figs. 10
and 11, and the largest recess at forms a guide for the lower end of the
middle part b, the top end of which is turned to fit in a recess in the top
part c, in the centre of which is a taper hole to guide the top end of the
chill pin d. The three parts a, b, c, of the moulding box are held
together by pins e and cotters f, or other equivalents.
The pattern of the shape of the exterior of the axle box or bush or
other similar article rests upon the bottom part of the moulding box;
the core shewn in Figs. 10 and 11 being then in the recess a³, and the
sand is rammed around the pattern in the middle part of the moulding
box. After ramming up the top part c the pattern is removed; con-
quently, it leaves its impression in the sand; the middle part is then
put to one side until the core shewn in Figs. 8 and 9 for the lower end
of the axle box, and the screw core shewn in Figs. 4 and 5 are placed in
the recesses a³ and ad in the bottom part a. The lower end of the chill
pin d is then put into its recess a¹, and the middle part is then placed
on the bottom part a; the core forming the recess for the lubricant,
shewn in Figs. 6 and 7, is then put on the top end of the chill pin, and
the top part of the moulding box is put on; the cotters f are then
driven through the slots in the pins e to hold the parts of the moulding
box together while the molten metal is run in.

page_text: The screw core shewn in Figs. 4 and 5 is made in the following
manner: The pattern screw is made in brass or other metal in five
pieces, the thread being accurately cut upon the exterior in the lathe ;
the centre piece y is a loose tapered ring, which after the model has
been rammed up in the sand is withdrawn; this allows the two pieces g¹,
the circumferences of which contain part of the screw, to be drawn
inwards and removed; the two remaining pieces g forming the other
portion of the screw can then be drawn inwards, and also removed,
leaving a perfect impression of the screw in the sand; this core is placed
on a true metal face plate, and after being dried in the usual manner is
ready for being placed in the recess a³ prepared for it in the bottom
part a of the moulding box.
By means of these improvements axle boxes or bushes or other similar
articles are cast true and ready for use on leaving the sand, the screw
being cast upon them to receive the nut, thereby obviating the necessity
of cutting the screw in a lathe, and the requisite degree of chilling or
hardening can be given to the inside of the box or bush to ensure
durability.
Having thus stated the nature of my Invention, and described a con-
venient mode of performing the same, I wish it to be understood that I
do not intend to limit myself to the details given, as they may be
considerably varied or modified according to the shape or size of the axlo
box or bush or other article to be cast, and I claim,-
First. The improved mode of casting axle boxes or bushes and other
similar articles, as shewn and described.
Secondly. The improved mode of casting screw threads on axle boxes
or bushes and other similar articles, as shewn and described.
And, lastly. The improved apparatus for moulding screw threads, as
shewn and described in reference to Figs. 4 and 5.
In witness whereof, I, the said Richard Norfolk, have hereto
set my hand and scal, this Twenty-ninth day of February One
thousand eight hundred and seventy-six.
DTATTL