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Патент USA US2119668

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June 7, 1938.
v_ H. QUPRE
METHOD OF MANUFACTURING COMPOSITE METAL
2,119,668
June 7, 1938.
‘ v_ H, DUPRE
v
2,119,668
METHOD OF MANUFACTURING COMPOSITE METAL
ßy
'
ATTORNEY
2,119,668
Patented June 7, 1938
UNITED STATES
PAT-ENT oFFlcE
METHOD OF MANUFACTURING COMPOSITE
METAL
-
,
Valentine H. Dupré, Oak Park, Ill., assignor to
Western Electric Company, Incorporated, New
York, N. Y., a corporation of New York
Application June ’7, 1935, ` serial No. 25,385
8 Claims.
(Cl. 22a-148.2)
This invention relates to methods of manufac
turing composite metal supporting devices, and
more particularly to methods of manufacturing
duced according to the following method.
mounting plates for coin collecting apparatus.
ferring to the drawings, particularly to the em
bodiment of the invention illustrated in Figs. 1
to 5, lncluslve, the mounting plate shown com
An object of this invention is the provision of
improved, inexpensive methods of manufacturing
composite metal supporting devices, such as
mounting plates for coin collecting apparatus.
In accordance with the above object the in
10 vention contemplates methods of manufacturing
a non-frangible mounting plate for coin collectors
comprising a strip steel frame having the de
sired contour and united at its abutting ends
within which is die cast a base portion having
15 several details, mounting lugs, and apertures, the
steel frame being provided with a series of suit
.
.
.
Re
/
prises a peripheral or outer steel frame or shell
I5 extending around a die cast baseportion I6
and a series of vsteel ribs I'I extending longitudi-ï
10
nally thereof.
The frame I5 is formed from flat strip steel
stock of the required dimensions and cut out at
its forward left hand edge (Fig. 1), as> indicated
at I 8 and I9, and at its rearedge at opposite ends
as indicated at 22 (Fig. 3) for use in the com
15
pleted coin collecting apparatus. At predeter
ably spaced apertures, or in its inner peripherywith depressions, perforated lugs, continuous or
mined spaced points around the four sides of the .
intermittent dovetail grooves, slots or other suit
able means to securely anchor the frame to the
countersunk apertures 23, the largest diameter of
the apertures being at the outer surfaces of the 20
frame. The apertures 23, as will be presently
die cast base portion. To further strengthen the
cast base portion spaced steel ribs having perfo
rations and/or perforated lugs or other means. eX
tending therefrom to securely anchor them are
engaged at their ends in notches formed in the
inner periphery of the steel frame, or in inwardly
extending lugs, the die cast base portion being
cast around the anchoring means and a portion
of the ribs.
30
A reinforced composite metal back or mounting -
plate for coin collecting apparatus _may be pro~
'
Other objects and advantages of this inven
tion will more fully appear from the following
detailed description taken in conjunction with
the accompanying drawings, wherein
Fig. 1 is a front elevational view of an im
proved reinforced composite metal mounting plate
for coin collecting apparatus produced in accord
ance with one method of this invention;
Figs. 2 and 3 are side and bottom plan views,
respectively, of the mounting plate illustrated in
Fig. 1;
Figs. 4 and 5 are enlarged horizontal and ver
tical sections taken on the lines 4-4 and 5_5,
respectively, of Fig. 1;
Fig. 6 is a fragmentary front elevational vleW
45 of a modified form of mounting plate;
Fig. '7 is a horizontal section taken on the line
'I-'I of Fig. 6;
Fig. 8 is a fragmentary plan view of Fig. 6
showing an alternative means for uniting the
50 frame and ribs;
Fig. 9 is a vertical section taken on the line 9--9
of Fig. 8, and
Fig. 10 is a section similar to that of Figs. 4
and 7 illustrating a further modification of the
55 invention.
frame I5 there is formed circular tapered or
described, serve to securely anchor the frame I5 ,
to the die cast base portion I6. Instead of aper
tures 23 extending through the thickness of the
strip forming the frame I5, depressions extending 25
from the inner peripheral surface of the frame
part way through the thickness of the strip may
be employed for anchoring the frame to the cast
base portion I6. Also formed in the frame I5 in
its inner peripheral surface and at opposite ends 30
are slots 24 for receiving the opposite ends of the
ribs I'I. The slots as clearly shown in Fig. 5 ex
tend from the bottom edge of the frame I5 with
which the lower edges of the >ribs are alined to
the top of the ribs.` It is understood that the
several cutouts I8, I9 and 22, apertures 23, 'or
depressions, and slots 24, are formed in the frame
strip whileit is in flat strip form in a manner
well known in the metalworking art. The frame
strip is then shaped upon a suitable forming 40
ñxture, to provide a desired contour for the
mounting plate as shownin Fig. 1 and the abut
ting ends of the strip, as indicated at 25 are then
electrically welded or otherwise integrally united.
Instead of a single strip the frame I5 may be 45
constructed from several strips extending around
the Abase portion I6 and united at suitable points.
The ribs I'I, like the frame l5, are >formed from
flat strip steel stock of the required dimensions
and cut away along one side to provide a series 50
of suitably spaced lugs 26 which maybe perfo
rated as indicated at 21 simultaneously with
their forming. Thereafter the lugs 26 are bent
at right angles to thebody of the ribto form the
completed rib I'I, clearly shown in Figs. '4 and 5. 55
2
2,119,668
in the completed mounting plate the lugs 26 and
die cast mounting plate constructions and the
apertures 21 serve to securely anchor the ribs I1
to the die cast base portion I6.
After positioning the ribs I1 in the slots 24 of
Ul the frame I5, the assemblage is placed in a suit
able die or mold, which is of sectional character,
carried in a die casting machine, and molten die
casting metal known in the market as “Zamak”,
or any other suitable die casting metal, is then
injected into the die under pressure in a manner
well known in the art and the die is filled with the
molten metal. The metal flows into every recess
cr space in the die thereby producing a true cast
method of producing them are identical.
Figs, 8 and 9 illustrate an alternative means
for uniting the frame 31 and ribs 4I of the con
struction shown in Figs. 6 and '1 wherein the
ing corresponding to the die cavity including the
15 space provided by the apertures 23 in the steel
frame I5 and the apertures 21 in the steel ribs
í?, thus producing an integral structure compris
ing the steel frame I5, cast base portion I6 and
the ribs I1.
In the die casting of the base portion I6 it is
provided with a plurality of mounting lugs or
details 29, 38, 34 and 32 and a housing 33, such
details serving in the completed telephone coin
collecting apparatus of which the reinforced
composite die cast mounting plate is a part to
support and house certain details of the appara
tus. The cutouts 22 in the steel frame I5 at op
posite ends of the rear edge, hereinbefore de
scribed, provide a space >for the entrance of elec
trical conductors, Which extend in some cases
from above and in other cases from below the
side surfaces, the strip then being formed into
the frame with the grooved side surface form 15
ing the inner periphery thereof. Longitudinally
extending steel ribs 46 are included in this em
bodiment which are cut from iiat stock and
perforated, as indicated at 41, at spaced points
along their length. In the casting of a base por 20
tion 48 within the frame 44 the dovetail groove
45 serves to anchor the frame to the cast base
portion and the` thickening of the cast base por
tion surrounding the upper perforated portion
and entered in the apertures 41 of the ribs 46 25
serves to anchor the ribs to the cast base por
tion. With the exception of the manner' of an
choring the frame 44 and the ribs 46 to the cast
base portion 46 the reinforced die cast mounting
plate construction shown in Fig. 10 and the meth 30
od of manufacturing it is identical to the mount
ing plates shown in Figs. 1 to '7, inclusive.
Although the frame 44 is described as being
molten metal during the casting operation into
the die cavity. At predetermined points through
out the cast base portion lI6 circular hollow
may be intermittently formed therein.
From the above description it will be apparent
that by practicing the methods of this invention
formed with a continuous dovetail groove in its
inner periphery it will be obvious that the groove
a
non-frangible
reinforced
composite
metal
mounting plate for coin collecting apparatus may ' 40
be economically and eñiciently produced, the
the telephone coin collecting apparatus.
parts being integrally united in such a manner
that a sturdy and Ydurable mounting plate is ef
fected. By casting the base portion within a
steel frame which surrounds its periphery and 45
securely anchoring it thereto and reinforcing it
by steel ribs united to the frame and also securely
anchored to the cast base portion., the cast por
tion is fully protected when assembled with the
coin collecting apparatus and when in use from 50
In Figs. 6 and '1 another embodiment of the
invention is illustrated, wherein a peripheral
>frame 31 is made from steel stock having a T
‘being cut >or burned away or otherwise tampered
with in an effort to pilfer coins from the» appara
tus. Furthermore, as is well known in the art
shaped cross-section throughout its length, the
the ‘die cast lbase portion requires practically noV
machining except to cut off the usual sprue left 55
on the casting whereY the molten metal is in
jected into the die cavity.
Although the embodiments of this invention
for attaching the telephone coin collecting ap
paratus carried by the mounting plate to -a sup
45 porting plate (not shown) which in turn is ñXed
to a vertical wall of a room or booth.
Also
formed in the cast base portion I6 during the
casting thereof are a plurality of «apertures 35
which are used in assembling certain parts of
55 center arm of the stock being operated upon
while ín flat form by punch and die and per
forating mechanism to form a series of pre
determinately spaced lugs 38 having perforations
39 extending therethrough. In another forming
operation the stock may be worked to provide
cutouts and slots similar to the cutouts I8, I9
and 22 and slots 24 described in connection with
the embodiment shown in Figs. l to 5, inclusive.
The lugs 38 and the 'perforations 39 therein of
65 the frame 31 serve in the completed mounting
plate to securely anchor the ’frame to a cast base
portion 4U cast within the frame which also
carries longitudinally extending steel ribs 4I,
similar to the ribs I1 of the back plate shown in
70 Figs.V 1 to 5, inclusive. VOther than the use of the
perforated lugs 38 extending from the inner
z75
vide a continuous dovetail groove 45 in one of its
apparatus, to the rear of the apparatus and then
are passed through a circular aperture 34 formed
in the cast base portion I6 during its casting.
The aperture 34 is also used for injecting the
bosses 35 are cast therein Which extend rear
wardly or from the back face thereof, the hol
lows of the bosses being countersunk at their
inner ends, for the purpose of receiving screws
50
perforated lugs 38 at opposite ends of the frame
are slightly extended toward the longitudinal
center line thereof and notched at 42 to receive
the ends of the ribs 4I.
The embodiment of the invention shown in Fig.
l0 consists in forming ya peripheral frame 44
from flat strip steel stock which is Worked to pro
peripheral surface of the frame 31 foranchoring
the frame to the cast base portion 48 and the
thickening lof the cast base >portion surrounding
the-lugs the two described reinforced composite
las herein illustrated and described are particu
larly well adapted for use in connection with 60
telephone coin collecting apparatus, it should
be understood that the invention is capable of
other applications and should be limited only
by the scop-e of the appended claims.
What is claimed is:
'
1. The method 'of making composite metal
mounting plates for coin collectors or the like
comprising shaping a perforated metal strip into
a frame of the desired contour for the mounting
plate, placing the frame in a die, and then in 70
jecting molten >die casting metal into the die
cavity and within the inner periphery of the
frame Vand'into the perforations .provided in the
frame to >interlock the 'frame tothe cast .portion._
2. The ~method of making composite- metal
2,119,668
mounting plates for coin collectors or the like
comprising shaping a metal strip into a frame
of the desired contour for surrounding tlie entire
peripheral surface of the mounting plate, uniting
the ends of the strip forming the frame, placing
the frame in a die, and then injecting molten die
casting metal into the die casting cavity and
Within the inner periphery of the frame and into
engagement with cooperating surfaces provided
on the frame to interlock the frame to the cast
portion.
3. The method of making composite metal
mounting plates for coin collectors or the like
comprising forming in a metal strip a plurality
15 of depressed surfaces, shaping the strip into a
frame of the desired contour for the mounting
plate, molecularly uniting the ends of the strip
in abutting relation, placing the frame in a die,
and then injecting molten die casting metalV into
the die casting cavity to surround the inner pe
riphery of the frame and into engagement With
the depressed surfaces thereof to interlock the
frame to the cast portion.
4. The method of making composite metal
25 mounting plates for coin collectors or the like
comprising forming on a metal strip a plurality
of perforated lugs projecting from one side there
of, shaping the strip into a frame of the desired
contour for the mounting plate, the perforated
30 lugs being positioned inside the frame, uniting
' 3
plurality of tapered perforations, shaping the
strip into a frame of the desired contour for they
mounting plate with thev largest diameter of the
tapered perforations disposed at the outer pe
riphery of the frame, uniting the ends of the vstrip
in abutting relation, forming from metal strip a
plurality of reinforcing ribs having a plurality
of perforated lugs extending angularly therefrom,
arranging the ribs Within the frame with their
opposite ends engaged ingrooves formed in op-ï 10
posite inner peripheral` surfaces of the frame,
placing they framein a die, and then- injecting
molten die casting metal into the die casting cav- '
ity and Within the inner periphery of the frame
to form a cast base plate portion and entered in '15
the tapered perforations of the frame, surround
ing the perforated lugs of the ribs, and entered
in_the perforations of the lugs to interlock the
frame to the cast base plate portion.
7. The method of making irregular rectangular 20
shaped composite metal mounting plates for tele
phone coin collectors or the like comprising
forming a steel frame of the desired contour for
the mounting plate with a plurality of steel ribs
extending longitudinally thereof within its inner
periphery and united thereto, placing the frame
in a die, and then injecting moltendie castingY
metal into the die cavity and Within the inner
periphery of the frame to> form a cast base plate
portion, surrounding a portion of the ribs, and 30
the ends of the strip forming the frame, placing
engaging cooperating surfaces provided on the
the frame in a die, and then injecting molten die
frame and the ribs to interlock the same to the
casting metal into the die casting cavity and
within the inner periphery of the frame, sur
rounding the perforated lugs, and entered in the
cast base plate portion, the »latter portion being
cast with several details, mounting lugs and ap
perforations of the lugs to interlock the frame to
8. The method of making composite metal
the cast portion.
.
5. The method of making composite meta
mounting plates for coin collectors or the like
40 comprising shaping a metal strip into a frame
of the desired contour for the mounting plate
with a plurality of reinforcing metal ribs Within
the inner periphery of and united thereto, plac
ing the framein a die, and then injecting molten
45 die casting metal into the die cavity and Within
the inner periphery of the frame, surrounding a
portion of the ribs, and into engagement with
cooperating surfaces provided on the frame to
interlock the frame to the cast portion.
6. The method of making composite metal
ertures for use in the coin collector.
mounting plates for coin collectors or the like
comprising forming on a metal strip a plurality
of perforated lugs projecting from one side there- '
of, shaping the strip into a frame of the desired 40
contour for the mounting plate with a plurality
of reinforcing metal ribs Within' the inner pe
riphery of and united to the frame by being en
tered at opposite ends in notches formed in the
lugs of the frame, placing the frame in a die, and
then injecting molten die casting metal into the
die cavity and Within the inner periphery of the
frame, surrounding a portion of the ribs, and
into engagement with cooperating surfaces pro
vided on >the frame to interlock the frame and
mounting plates for telephone coin collectors or ` the ribs to the cast portion.
the like comprising forming in a metal strip a
35
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Y
P
VALENTINE I-I. DUPRE.
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