Improvements in or Applicable to Moulders' Patterns.
Year: 1897

page_text: Date of Application, 18th Nov., 1897-Accepted, 22nd Jan.,
1898
[Communicated from abroad by CHRISTIAN LEUCHTER, OF NO. 1, Tempo
Aachen, in the German Empire, Pattern Maker.]
Improvements in or Applicable to Moulders' Patterns.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester, both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil 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:
The invention which forms the subject of the present application relates to
patterns such as are used in preparation of moulds for castings and the like.
As is well known the wooden patterns usually employed in the forming of
moulds for castings are very liable to be damaged. There need only be men-
tioned the repeated moving, releasing, and taking out whereby during these
operations the pattern is liable to be damaged by blows and knocks; the work-
men often burn or drive sharp hot irons into the pattern in order to form a
holding place whereby they can release or take away the pattern from the
mould. The pattern handle hitherto known is usually made fast by means of
screws, nails, or the like, that is firmly secured to the pattern; which handles
however in the case of thick wooden patterns become loose in a very short
time, and in the case of patterns of thin wood are liable to break away after
two or three times of use, or even to separate themselves altogether from the
pattern when it is being taken out of the mould. By this means and especially
when there is rough usage of the handle the pattern is materially damaged.
The present invention relates to a pattern holder in combination with a
lifting handle which obviates the above mentioned draw-backs, and which leaves
the pattern in the same condition after its use as before it, and moreover gives
the advantage of a convenient handling during and after the moulding. The
said pattern holder is attached with spikes, or the like, to the pattern in such a
manner that it can only be separated therefrom by very violent breaking. There
is therefore no possibility of the holder becoming separated from the pattern in
the mould. The lifting handle belonging thereto is easily inserted in the
holding device and firmly fixed therein so that it facilitates the handling of the
pattern in every direction.
Referring to the accompanying drawings the invention is illustrated in the
separate figures as follows:-
Figure I shews an elevation of the pattern handle and the lifting device in
place.
Figure II shews a section on the line C-D of Figure I.
Figure III shews a section on the line E-F Figure I.
Figure IV shews diagrammatically the relative position of the points 3 and 3¹.
Figure V shews a section on the line G-H of Figure II.
Figure VI shews a modification of the box 5 shewn in Figure I.
Figure VII shews a view from below of the circular orifice of the hole 4.
Figure VIII shews a modification of the box 5 shewn in Figure II.

page_text: In the pattern 1, (Figs. I and II) is bored a hole or several holes according
to its size, upon which the disc 2 is placed so that the box 5 on the said disc
is countersunk, and the points or spikes 3 are pressed into the wood, (see
Figures I, III, and VI); the under part of the said box 5 ends in the points
or spikes 6, (see Figures VI, VII, and VIII). The disc with the box 5
possesses an oval aperture 4, going right through it which is widened below
conically and becomes quite round at the points 6, (see Figure VII). Upon
the opposite side of the pattern the disc 7 is so placed that its raised part 8
encloses the points 6 of the said box 5, (see Figures VI and VIII). The
points 31, 31, which are also attached to the disc 7 can also be driven into, the
wood of the pattern. They must however stand between the points 3, 3, 3, as
shewn in Figure IV, the black circles having the position of the upper points
and the white circles that of the lower points: This arrangement is important
for the pattern in as much as thereby the surrounded wood is protected against
damage, because the points 3, 3, and 31, 31 hold the same together. If now' by
the insertion of a mandrel and by aid of a hammer the points 6 are bent round
in the hole of the disc 7, which descends in a sloping direction downwards, (see
Figures I and II) the points 3, 3, and 31, 3', will be driven in in the above
described manner. The two discs .2 and 7 then form a single whole, whereby
the latter 7 is firmly attached to the edge of the box 5, and they both grasp the
pattern in a carefully protected manner. As already stated the disc 2 with
the box 5 possesses a conical hole becoming wider below; in this the stemi 9 of the
lifting device is inserted with its lower conical flattened end 10, as far as the
screw 11 placed thereon will permit. Upon this the wing-nut 12 can be turned
up and down.
If the handle 9, with its end 10, be placed in the oval hole which widens
downwards to the box 5, and revolved 90°, the same can be fixed against the
disc 2 by the use of the wing-nut 12.
It is obvious that by means of the invention of the device forming the
subject of this application a complete protection of the pattern is obtained at
the time of and after the moulding, the detaching of the holding device from
the pattern cannot take place, and this combination is so firm through the
clinching of the spikes in the pattern walls, that a splintering of the same can
only be effected by intentional mishandling. The holding device in combina-
tion with the lifting device forms a means of handling the said pattern in any
desired direction. The above described parts are all constructed of metal.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:-
1. The above described attachment for patterns consisting essentially of the
disc 2 provided at its inner side with points 3 which points engage in the wood
of the pattern and the box 5 provided with points 6 on its lower edge with an
aperture 4, oval above and round below, which box is held fast in the pattern
by means of a counterdisc 7, (provided with points 31, 31 which penetrate the
wood) and likewise by points 6.
2. A releasable handle for use with the apparatus set forth in Claim 1,
characterized by the provision of a holding-bolt 9, provided with a wing-nut
which bolt engages in the hole 4 of the box 5 held firmly in the pattern
by means of the counterdisc 7, which disc has internally points 31, 31, the said
box being provided below with points 6 substantially as described.
+
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.