Improvements in Moulds for Prism Lights and like Articles of Glass.
Year: 1898

page_text: Date of Application (in United Kingdom), 18th Apr., 1898
Complete Specification Left, 21st Apr., 1898-Accepted, 8th Oct., 1898
PROVIDIUNAL DIECIFICATION.
Improvements in Moulds for Prism Lights and like Articles of Glass.
I, KRAFT BOOTH, 1129, Rookery Building, in the City of Chicago, County of
Cook and State of Illinois, United States of America, Mechanical Engineer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to molds for prism lights and has for its object to pro-
vide a new and improved mold of this description.
My invention is illustrated in the accompanying drawings, wherein
Figure 1 is a transverse section of the mold on line 1-1, Figure 2;
Figure 2 is a longitudinal section through the mold on line 2-2, Figure 1;
Like letters refer to like parts throughout the several figures.
In molding prism lights, certain conditions are met due to the fact that the
prism light consists of a comparatively thin sheet of glass provided with com-
paratively thin projecting prisms or parts. These prism lights have heretofore
been molded by means of a mold in which the plunger engages one face of the
prism light. In my present invention, I mold a series of prism lights at one
operation by means of what may be called a fount mold. This mold may be
formed in various ways, but I have selected a particular and simple construction
for the purposes of illustration.
As shown in the drawings, the mold is provided with a suitable core A, pre-
ferably of metal or some heat conducting substance. This core may be of any
desired shape and is surrounded by an outer part B. The prism lights are
formed between the core and the part B, said prism lights being formed around
said core.
The number of prism lights that can be formed at one time will of
course depend upon the number of sides with which the core is provided. In
the mold herein illustrated, a series of spaces A' are provided between the part B
and the core A. The part B is provided with the projecting parts B' which form
the prisms on the prism light. The core A and the part B are preferably con-
nected together so that they may be moved relatively in order to compensate
for the variations in the mold due to the difference in temperature, and for any
other reason making it desirable to have such a construction. This result may
be obtained by any suitable mechanism. As shown in the drawings, a rod or
shaft C is mounted in the holding piece C¹ which supports the part B. This
shaft passes through the core A. and is provided with an eccentric part A so
that when the rod is rotated the core A and the part B may be moved relatively.
[Prine 8d1

page_text: It is of course evident that the eccentric may be placed in the part C¹ if desired.
Some suitable controlling device is attached to the shaft C so that its position
may be varied. I have illustrated the shaft C as provided with the controlling
handle C. Located above the core A' is a suitable "fount "or containing part D,
in which the material from which the prism lights are formed is placed. This
containing part D is provided with the ring I and the plunger 12 which works
therein. The spaces or recesses A'connect with the opening in the part D so
that when the material is placed therein it will run into said recesses, the recesses
being completely filled by the pressure created when the plunger is forced down-
wardly. The spaces or recesses, A' in which the prism lights are formed are
preferably inclined, as illustrated in Figure 2, so that when the part B is lifted
upwardly a short distance it is entirely free from the prism lights.
In forming prism lights with the device herein shown, the parts are placed
together, as illustrated in Figure 2, and the molten material placed in the open-
ing in the part 1). The plunger 1) is then forced downward so as to force the
molten material into the recesses A¹ and completely fill them. The plunger is
then drawn back and the part D removed. The part B is then lifted upwardly
so as to be free from the prism lights, leaving the prism lights in position in
contact with the core A. It will be seen that by this construction I am enabled
to form a series of prism lights by one operation, the number of lights depend-
ing upon the number of sides with which the core A is provided.
When prism lights are made in the ordinary manner, the plunger comes
in contact with the prism light and it is exceedingly difficult to make the different
prism lights of uniform thickness. When my mold. is used, this difficulty is
obviated, for the thickness of the prism lights depends upon the size of the
recesses A¹, and as these recesses may be made uniform, it will be seen that all
the prism lights will be of uniform thickness. The part B is preferably made
in sections, as shown in Figure 1, so that the grooves between the parts A¹ may
be easily milled. These sections are then pinned together at the corners.
part D may also be made in sections similar to the part B, but these sections are
pivoted together so that the mold may be opened. The parts B and D may be
connected together so as to form a single part if desired. I have shown the
core A as solid, but it is of course evident that it may be hollowed out or inade
of any other desired shape. It is of course evident that the recesses A¹ may be
The
formed so as to mold any article desired and I of course do not limit my invention
to the molding of prism lights.
COMPLETE SPECIFICATION.
Improvements in Moulds for Prism Lights and like Articles of Glass.
I, KRAFT BOOTH, 1129, Rookery Building, in the City of Chicago, County of
Cook and State of Illinois, United States of America, Mechanical 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 follow-
ing statement:
-
My invention relates to molds for prism lights and has for its object to pro-
vide a new and improved mold of this description.

page_text: My invention is illustrated in the drawings filed with my Provisional Specifica-
tion, and wherein.
Figure 1 is a transverse section of the mold on line 1-1, Figure 2;
Figure 2 is a longitudinal section through the mold on line 2-2, Figure 1;
Like letters refer to like parts throughout the several figures.
In molding prism lights, certain conditions are met due to the fact that the
prism light consists of a comparatively thin sheet of glass provided with com-
paratively thin projecting prisms or parts. These prism lights have heretofore
been molded by means of a mold in which the plunger engages one face of the
prism light. In my present invention, I mold a series of prism lights at one
operation by means of what may be called a fount mold. This mold may be of
various constructions and the several parts may be formed in various ways, but
I have selected a particular and simple construction for the purposes of illustra-
tion.
"
As shown in the drawings, the mold is provided with a suitable core A, pre-
ferably of metal or some heat conducting substance. This core may be of any
desired' shape and is surrounded by an outer part B. The prism lights are
formed between the core and the part B, said prism lights being formed around
said core. The number of prism lights that can be formed at one time will of
course depend upon the number of sides with which the core is provided. In
the mold herein illustrated, a series of spaces A' are provided between the part B
and the core A. The part B is provided with the projecting parts B' which form
the prisms on the prism light. The core A and the part B are preferably con-
nected together so that they may be moved relatively, in order to compensate
for the variations in the mold due to the difference in temperature, and for any
other reason making it desirable to have such a construction. This result may
be obtained by any suitable mechanism. As shown in the drawings, a rod or
shaft C is mounted in the holding piece C¹ which supports the part B. This
shaft passes through the core A and is provided with an eccentric part A2 so
that when the rod is rotated the core A. and the part B may be moved relatively.
It is of course evident that the eccentric may be placed in the part C¹ if desired.
Some suitable controlling device is attached to the shaft C so that its position
may be varied. I have illustrated the shaft C as provided with the controlling
handle C. Located above the core A is a suitable "fount' or containing part D,
in which the material from which the prism lights are formed is placed. This
containing part D is provided with the ring D₁ and the plunger D2 which works
therein. The spaces or recesses A¹ connect with the opening in the part D so
that when the material is placed therein it will run into said recesses, the recesses
being completely filled by the pressure created when the plunger is forced down-
wardly. The spaces or recesses A¹ in which the prism lights are formed are
preferably inclined, as illustrated in Figure 2, so that when the part B is lifted
upwardly a short distance it is entirely free from the prism lights.
•
In forming prism lights with the device herein shown, the parts are placed
together, as illustrated in Figure 2, and the molten material placed in the open-
ing in the part D. The plunger D2 is then forced downward so as to force the
molten material into the recesses A¹ and completely fill them. The plunger is
then drawn back and the part D removed. The part B is then lifted upwardly
so as to be free from the prism lights, leaving the prism lights in position in
contact with the core A. It will be seen that by this construction I am enabled
to form a series of prism lights by one operation, the number of lights depend-
ing upon the number of sides with which the core A is provided.
When prism lights are made in the ordinary manner, the plunger comes
in contact with the prism light and it is exceedingly difficult to make the different
prism lights of uniform thickness. When my mold is used, this difficulty is
obviated, for the thickness of the prism lights depends upon the size of the
recesses A, and as these recesses may be made uniform, it will be seen that all
the prism lights will be of uniform thickness. The part B is preferably made

page_text: in sections, as shown in Figure 1, so that the grooves between the parts A¹ may
be easily milled. These sections are then pinned together at the corners.
The
part D may also be made in sections similar to the part B, but these sections are
pivoted together so that the mold may be opened. The parts B and D may be
connected together so as to form a single part if desired. I have shown the
core A as solid, but it is of course evident that it may be hollowed out or made
of any other desired shape. It is of course evident that the recesses A¹ may be
formed so as to mold any article desired and I of course do not limit my invention
to the molding of prism lights.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:
1. A mold for prism lights, comprising a core, a surrounding part inclosing
said core, said surrounding part and said core movable with relation to each other,
a series of recesses intermediate between said core and said surrounding part,
in which the prism lights are formed, and means for forcing the material from
which the prism lights are formed into said recesses.
2. A mold for prism lights, comprising a core, a surrounding part inclosing
said core, said surrounding part and said core movable with relation to each other,
a series of recesses intermediate between said core and said surrounding part, in
which the prism lights are formed, said recesses inclined with relation to each
other, and means for forcing the material from which the prism lights are formed
into said recesses.
!
3. A mold for prism lights, comprising a core, around which the prism lights
are formed, a surrounding part inclosing said core and movable with relation
thereto, a series of recesses intermediate between said core and surrounding
part, in which the prism lights are formed, the opposed surfaces of the core and
surrounding part inclined so that a relative movement of said core and sur-
rounding part varies the distance between said opposed surfaces, and means for
forcing the material from which the prism lights are formed into said recesses.
4. A mold for prism lights, comprising a core, around which the prism lights
are formed, a surrounding part inclosing said core, a series of recesses between
said surrounding part and said core, in which the prism lights are formed, means
for producing a relative movement between said core and surrounding part
while the parts are in position, so as to compensate for inequalities due to
variations in temperature and the like, and means for forcing the material from
which the prism lights are formed into said recesses.
5. A mold for prism lights, comprising a core, a surrounding part inclosing
said core, a series of recesses intermediate between said surrounding part and
core, in which the prism lights are formed, a reservoir above said core, in which
the material from which the prism lights are formed is placed, said reservoir
communicating with said recesses, and a plunger or the like adapted to be forced
into said reservoir.
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