Improved Apparatus for Forming Sand Cores for Moulding Purposes.
Year: 1888

page_text: Date of Application, 19th Sept., 1888
Complete Specification Left, 19th June, 1889-Accepted, 27th July, 1889
PROVISIONAL SPECIFICATION.
Improved Apparatus for Forming Sand Cores for Moulding
Purposes.
We JOSEPH FRANKLAND, Foreman Moulder, of Keighley, Yorkshire, and WILLIAM
HENRY SUMMERSCALES of the same place Washing Machine Maker do hereby declare
the nature of this invention to be as follows:-
Our invention has reference to a new construction of apparatus for forming sand
cores for moulding purposes, our improvements referring more particularly to means
for forming cores in the shape of external screws, so that when molten metal is
poured around the said core, an internal screw thread or nut is formed in the casting,
and is capable of receiving a screwed rod or bolt, whereby the making of internal
screw threads in castings is much more cheaply performed than by cutting the said
screw threads.
In carrying out our invention we mount upon hinges, four or other suitable
number of bell crank levers, the upper ends of which are formed in segments and
when put together form an internal nut, such as is intended to be formed in the
casting, and when it is intended to form a core the four segments with the internal
screw threads are placed together and a box or collar placed over the segments for
the purpose of keeping the parts together, after which the sand to form the core is
introduced and rammed tightly after which the collar is removed and the four hinged
segments fall away by means of weights or springs, leaving upon a stand or pillar
the newly formed screwed core, which is then taken to be dried in the ordinary.
manner of core making.
By this means screw threaded sand cores can be accurately and expeditiously
made, consequently the casting of internal screw-threads in metal can be cheaply
performed.
DL: 10TL 1...
Hantahan 1000
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
Improved Apparatus for Forming Sand Cores for Moulding
Purposes.
We, JOSEPH FRANKLAND, Foreman Moulder, of Keighley, Yorkshire, and WILLIAM
HENRY SUMMERSCALES, of the same place, Washing Machine Maker, 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:-
Our invention has reférence to a new construction of apparatus for forming sand
cores for moulding purposes, our improvements referring more particularly to means
for forming cores in the shape of external screws, so that when molten metal is
poured around the said core, an internal screw thread or nut is formed in the casting,
and is capable of receiving a screwed rod or bolt, whereby the making of internal
screw threads in castings is much more cheaply performed than by cutting the said
screw threads.
In carrying out our invention we mount upon hinges four or other suitable
number of bell crank levers, the upper ends of which are formed in segments and
when put together form an internal nut, such as is intended to be formed in the
casting, and when it is intended to form a core the four segments with the internal
screw threads are placed together and a box or collar placed over the segments for
.

page_text: the purpose of keeping the parts together, after which the sand, to form the core is
introduced and rammed tightly, after which the collar is removed and the four
hinged segments fall away by means of weights or springs, leaving a stand or pillar
the newly formed screwed core, which is then taken to be dried in the ordinary
manner of core making.
In order that our invention may be more fully understood, we will now make
reference to the accompanying sheets of drawings illustrative thereof, wherein Fig. 1
is elevation, partly in section, of our apparatus for forming screwed sand cores; and
Fig. 2 is plan view thereof. The several parts occupy the positions they assume
when a core is about to be made. The apparatus comprises a foundation plate A,
having a central stand or pillar B, to which are hinged at a levers C weighted at D.
The inner part of each lever C is formed with an internal screw thread, as shewn in detail
Fig. 3, so that when the four levers are closed as shown in Fig. 1, a complete
internal screw or nut is formed, all of which are kept in position by a collar E. In
order therefore to form a screwed sand core by our apparatus, the upper end of the
four levers are closed and kept in that position by the collar E, after which the sand
is placed into the nut-shaped hollow and rammed tightly therein, so as to form a
screwed sand core, after which the collar E is removed, when the weights D cause.
the levers to open out as shewn in Fig. 4, leaving the screwed sand core resting
upon the upper end of the pillar B, when the said core is removed to be dried in the
ordinary way. Wood blocks F are attached to the foundation plate A for the
weights D to rest upon, and to prevent the said levers from rebounding when
released by the movement of the collar E. For making another sand core the
levers Care again closed and the collar E is placed thereon as before and the operation
repeated, by which means screwed sand cores can be made with great rapidity and
at small cost. Figs. 5 and 6 are elevation and section respectively of the collar E,
and Fig. 7 shews a screwthread formed in a casting, by the aid of a core made by
our apparatus.
By means of the apparatus herein shewn and described, screw-thread sand cores
can be accurately and expeditiously made, consequently the casting of internal screw
threads in metal is now cheaply performed.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
:-
Firstly. The apparatus substantially as herein shewn and described, for forming
screwed sand cores.
Secondly. In an apparatus for forming sand cores, the use of the collar E for
keeping the levers C in position.
Dated this 18th day of June 1889.
TASKER & CROSSLEY,
Halifax, Agents.