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Патент USA US2390776

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Dec. l1, 1945.
2,390,776
D. R. CLEMONS
METHOD OF MOUNTING ELECTRICAL CONDENSERS
2 Sheets-Sheet l
Original Filed Oct. 24, 1941
2
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IVENTOR.
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Dec. l1, 1945.`
2,390,776
D. R. cLEMoNs
METHOD OF MOUNTING ELECTRICAL CONDENSERS
Original Filed Oct. 24, 1941
2 Sheets-Sheet 2
INVENTOR.
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2,390,716
Patented Dec.- 1l, 1945
UNITED STATES PATENT OFFICE
METHOD 0F MOUNTING ELECTRICAL v
CoNDENsERs
‘l
Dale R. Clemons, Riverside, lll., assignor to West
ern Electric Company, Incorporated, New York,
N. Y., a corporation of New York
'
Original application October 24, 1941, Serial No.
416,287. Divided and this application March
12, 1943, Serial No. 478,893
2 Claims. (Cl. 29-25.42)
ing block by the method of the present invention;
This invention relates to a method yof mounting
i
Fig. 7 is a perspective view of an electrical con- f
electrical condensers and the like, and is a divi
sion of my copend ng application, Serial No.
denser that has been provided with a cast mount
416,287, filed Octobe .24, 1941.
ing block by the method of the invention; and
‘
Electrical condensers, particularly those of the
type which are sealed in metal containers, are
sometimes attached to flat supporting members
or mounting plates by means of mounting studs
which are anchored in the sealedy covers of the
Fig. 8 shows several such condensers attached
- to a mounting plate.
Referring now to the drawings, there is illus
trated in Fig. 6 an electrical condenser I0 of a
well known type employed in telephone communi
ccndenser'containers and project perpendicularly 10 cation systems.` The illustrated condenser com
therefrom. It is essential, in some instances, that
such condensers be accurately aligned with re
, prises an outer metal casing or container Il hav
ing a sealed-'on cover I2 to which are soldered the
two terminal posts I3--I3. The cover is pro
spect to the supporting member or mounting plate
vided with the usual filling hole I5 which is sealed
to present a pleasing appearance 'and/or to permit
the mounting of a plurality of condensers on close 15 by a globule of solder I6. A mounting stud I1 is
anchored to the cover for use in attaching the
centers. However, the presence of the usual sol
condenser to a supporting panel or mounting plate
dered terminal posts and soldered filling holes on
I8, as shown in Fig. 8.
,
`
the condenser covers usually present irregular
In accordance with a feature of the present
surfaces surrounding the mounting studs which,
heretofore, has rendered it difilcult and costly to 20 invention, a flat surfaced embossment or mount
ing block I9 (Fig. 7) is molded or cast directly
properly align` such-condensers with respectl to
on the cover, adjacent to and surrounding the
the mounting plates. '
An object ofthe present invention is to provide
an improved vmethod of mounting electrical con
densers andthe like, whereby the above men
tioned objections are eliminated.
'
f' In accordance'with the above object, one em
mounting stud I1. This mounting block is prei
. erably composed of a lead-antimony-tin alloy, but
other alloys, as well as various non-metallic mold
ing materials, may be used. It is necessary, only,
that the mounting block be firmly attached to the
condenser cover and that it have a flat outer sur"
face 20 for engaging and cooperating with the
vision of a method of mounting an electrical con
denser on a flat surfaced support, in which a flat 30 mounting plate to maintain the condenser- sub
bodiment of the invention contemplates the Ápro
surfaced mounting block or embossment is molded
stantially perpendicular to the mounting plate, -as
or cast directly on the condenser, after which the
shown in Fig. 8.
condenser is attached to the `support with the
. ilat`surface of the embossment contacting and
flush with the flat surface of the support.
A more complete undertsanding of the method
of the present invention may be had from the
following detaileddescriptionwhen read in con
junction With the accompanying drawings, in
which
-
.
I
'
A preferred form of molding fixture for casting
the molding block on the condenser cover is illus
trated in Figs. 1 to 5, inclusive, of the drawings.It comprises a mold block 22 which is removably
attached by screws 23 to the base of an L-shaped
frame 24, the latter being attached by the same
screws to a supporting plate 25. . This plate has
40 four downwardly turned flanges 26, 26 which
serve -as supporting legs for the fixture when
Fig. l is a vertical sectional view of a molding
fixturel by means of which the method may be
practiced, the section being taken on line I-I
placed on a table or work bench.'
ofFig. 3:
in an inverted position,` as shown in broken lines
,
m
Fig. 2 is a side elevational view of the ñxture;
The condenser is placed in the molding fixture
45 in Fig. 1, and it will be noted that the mold block-
ber, the latter being shown in the open position;
22 of the fixture is formed on its upper surface
with a depression 28 which conforms to and ac
commodates the cover of the condenser. Within
y Fig. 5 is a front elevational view showing the
this depression and centered with respect thereto
Fig. 3 is a plan view thereof;
Fig. 4 is a plan view of the mold and gate mem
manner in which the fixture is held in a tilted po 50 is a mold cavity 30 (Figs. 1 and 4) which is shaped
sition upon an electromagnetically vibrated plate
to conform to the shape of the embossment or
during the pouring of the molten metal into the
mounting block to be cast on the condenser cover,
mold cavity;
_
and the bottom of the mold cavity is flat so as to
Fig. 6 is a perspective view of an electrical con
form a fiat mounting surface on the cast mount
denser adapted to be provided with a cast mount, 55 ing block.
aecomo
Mold block 22 and supporting frame 24 are
provided with aligned close fitting apertures 32
and 33, respectively, for accomodating the
mounting stud -l1 oi' the condenser. Notches 3l,
3l (Figs. 3 and 4) are provided in the mold block
In the operation oi the above described mold-_
ing ?xture, a condenser is placed therein in an
~inverted p0sition, as shown in broken lines in
Fig. l, with` the mounting stud I1 inserted in the
and frame for accommodating the terminal posts
i3 of the condenser and two apertures 3l--35 are
provided in the basex plate 2l for receiving the
apertures 32 and 33 and with the body of the
condenser lying in the channel B3 of gauge block
5| . The condenser is thus positioned perpendic
ular to the ilat bottom surface of the mold cavity
condenser terminals.
30. With the condenser so positioned, the gate
'
To the right ot the mold cavity 30, a tapered 10 40 is closed and the'iixture is held in a tilted posi~
depression or filling trough 31 is provided in the «
tion upon- a vibratory plate 10, as shown in Fig. 5.
By means. of an electromagnet 12, the plate is
upper surface of the mold block and a slot 33 in
vibrated while molten metal is poured into the
the adjoining wall of the mold cavity connectsl
the cavity with the trough. '
mold cavity through the inlet opening I1 by way
»
of the illling trough 31. The iixture is vibrated
A gate member 40 is hinged or pivoted on the
by the vibrating plate, thus forcing the molten
protruding ends of a' iixed horizontal pin 4i
metal into all corners of the mold cavity.
mounted in the mold block. This gate member is
A suilicient amount of molten metal is poured
provided with a suitable handle 42 by means of
into the mold to completely illl the mold cavity
which it may be opened and closed. 'I'he gate is
formed with a tapered groove 84 which termi 20 and then rise in the ñlling trough 31 to the level
indicated at 13 in Fig. 5. After the metal in the '
nates at its smaller end in a slotted projection
mold has been allowed to “set,” the iixture is
45. When the gate is closed, as shown in Figs. l,
removed from the vibrating plate, the gate “i is '
2 and 3, the slotted projection I! cooperates with
the slotted wall of the mold cavity to provide an '
opened, and the condenser with -the block of metal
cast thereon is ejected from the ilxture. The
inlet opening I1 (Fig. 2) for the mold cavity, and
ejection is accomplished by manually lifting the
it will be obvious that the tapered groove 4l of the
gage is adapted to cooperate with the tapered
ejector bar 80 to lift the condenser and cast block
depression 31 in the mold block to guide and
out of the mold while the outer end of ejector '
- lever 68 is pressed downwardly so that the inner
direct the molten metal toward the inlet opening
80 end thereof is projected upwardly to eject from
61.
`
the filling trough 31 the protruding burr formed
To theupper end of the upstanding portion of
on the cast block by the overilow of metal into the
frame 24, there is attached a suitable vhandle 50
filling trough. This protruding burr is then re
and a channeled guide or gauge block 5|. The
moved by clipping it oil’ with close cutting pliers,
gauge block is provided on opposite sides thereof
thus leaving attached to the condenser cover a
with two guide channels 53 and 5l for accommo-
dating the body portion of the condenser and
cast mounting block I9 (Fig. '1) having smooth
these guide channels are of different widths so
side edges and a flat surface 2li for engaging and
that by simply reversing the gauge block, the
fixture may be adjusted to handle condensers of
two diiïerent sizes.
the condenser perpendicular with respect to the
mounting plate, as -shown in Fig. 8.
cooperating with the mounting plate to maintain l
The frame 2t is of channel cross section and an
It will be obvious that the invention is not
ejecting bar ß@ is vertically slidable therein be
hind iixed retaining pins äI-SL as b'est shown in
Fig. 1. This ejecting bar has a horizontal out
wardly extending handle portion 33 at its upper
end and a horizontal inwardly extending arm 64
limited to the speciñc embodiment thereof- herein
illustrated and described, but is capable of other
applications within the scope of the appended
claims.
What is claimed is:
at its lower end. When the ejecting bar is man
1. A method of making an electrical device
ually lifted by means of the handle portion 63,
having a ñat mounting surface thereon, which
the arm Si! is adapted to press upwardly on'the
stud i1 of the condenser to lift the condenser out
comprises placing an electrical unit in a con
of the mold.
‘
v
An auxiliary ejector in the form of a lever 36
is provided for cooperating with ejecting bar 60
tainer, securing a closure member to the con
tainer and molding directly on said closure mem
ber a mounting block having a ilat molded sur-4
face.
'
"`-
to remove the condenser and the attached cast
2. A method of making an electrical devic
mounting block from Vthe mold. 'I'his ejector
having a ñat mounting surface thereon, which
lever is pivoted on the horizontal pin Il and oper
ates in .a slot â'l in the mold block. A coil spring
63 is arranged to press upwardly against the
outer end of the lever so that the inner end there
comprises placing an electrical unit in a con'
tainer having substantially parallelv side walls
and an open end, securing a, closure member to
said open end, and molding directly on said clo
of is normally held in its retracted position within 60 sure member a mounting block having a iiat
moulded mounting surface substantially perpen
the slot 61. When in this position, the upper
dicular to said side walls.
surface of the lever is ilush with the bottom of
the iiiling trough 31 of the mold block.
DALE R. CLEMONS.
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