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Патент USA US2406455

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Aug. 27, 1946:
Filed Feb. 5, 1945
'2 Sheets-Sheet 1
"at 11/1
9mm pay/am.
Aug 27,1946.
(3, D, DA\‘/|D_soN
Filed Feb. 5, 1945
2 Sheets-Shee£ 2
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and?may?més v v
Patented Aug. 27, 1946‘
Cyril D. Davidson, Washington, Pa.
Application February 5, 1945, Serial No. 576,266
1 Claim.
(Cl. 18-6)
This invention relates to a vulcanizing unit,
and more particularly to such a device adapted
for curing splices in cables, as for example in
ing I0, double-walled and adapted to be ?lled
with ?uid, as at H, (see Fig. 6) and provided
with a plurality, illustratively three, transversely
mining cables.
A primary object of this invention is the pro
vision of an improved vulcanizing unit provided
with extra curing capacity, which enables a plu
rality of cables to be vulcanized simultaneously,
14, each provided with a plurality of longi
tudinally extending, cable-containing grooves 15
and. I6, respectively (see Figs. 1 and 3). The
extending recesses or depressions [2, adapted to
contain upper and lower mold blocks 13 and
upper portion of each of the channels I2 is pro
man hours, normally occasioned by defective 10 vided with oppositely disposed, longitudinally ex
tending grooves H, in which are adapted to be
splices in less effective molds.
slidably positioned blocks l8, each provided with
An additional object of the invention is the
a plurality of threaded apertures [9, in which are
provision of an improved device, which may be
adapted to be positioned bolts or screws 20. The
readily carried or removed from spot to spot
in such manner as to save rubber, copper and
15 bolts 20 are of a suf?cient length that, when
as required.
tightened down, they may abut and ?rmly com
A still further object of the invention is the
press the upper surface of the upper mold block
provision of such a device characterized by a
plurality of removable molds, whereby a plu
rality of sizes of cables may be readily vulcanized
simultaneously, if desired.
A still further object of the invention resides
in the provision of such a device which will be
sturdy and durable in construction, reliable and
M, for the purpose of compressing the cables
contained within the transverse grooves 15 and
20 I6.
Water is adapted to be fed into the recep
tacle l0 ‘through an inlet 25, which may also
comprise a plug for determining the quantity
of water in the water jacket, and an air release
e?icient in operation, and relatively simple and
25 valve 26 is correspondingly provided.
inexpensive to manufacture, and operate.
As best shown in Figure 5, the water jacket is
Other objects reside in the combinations of
provided with a safety valve 21 of conventional
elements, arrangements of parts, and features
type, provided with a nipple 28 to which may
of construction, all as will be more fully pointed
be attached a tube of any desired type to pipe
out hereinafter and disclosed in the accompany
ing drawings, wherein there is shown a pre
ferred embodiment of this inventive concept.
In the drawings:
Figure 1 is a side elevational view of one
form of vulcanizing unit constructed in accord
30 off excess steam, or the like, and a pressure
gauge 29 to indicate the pressure within the
As best shown in Figure 4, the opposite end
of the device is provided with a thermostatic
35 heat control 3|] of any desired conventional type
in association with an electric automatic switch,
likewise of known type, adapted to control an
ance with this inventive concept.
Figure 2 is a top plan view of the device dis
closed in Figure 1, certain parts thereof being
electric heating element 32, adapted to provide
omitted for the sake of clarity.
heat for the heating of the water H within the
Figure‘3 is a perspective view of one of the
40 water jacket.
molds adapted to be utilized in the device.
From the foregoing, the operation of the de
Figure 4 is an end elevational view of the
vice should now be readily understandable.
device shown in Figure 1, as viewed from the
When it is desired to vulcanize a mine cable, or
the like, or a plurality of the same, the cables
Figure 5 is an end elevational view similar to
are ?rst spliced, and the insulation applied
Figure 4, but disclosing the device in Figure 1 45 therearound, whereupon they are placed between
as viewed from the right.
‘the mold blocks l3 and M in the grooves l5 and
Figure 6 is a sectional View taken substantially
I6, positioned within the channel I2. The
along the line 6-6 of Figure 2.
screws 20 are then tightened downwardly until
Figure '7 is a perspective view of a construc
the molds are ?rmly closed, and the device is.
tional detail.
heated until a desired temperature is achieved.
Similar reference characters refer to similar
This temperature is maintained until the cable
is suitably vulcanized, whereupon the device may
be cut off and the completely vulcanized cable
device of the instant invention comprises a cas 55 removed therefrom.
parts throughout the several views of the draw
Having reference now to the drawings, the
While in the foregoing the device has been dee
scribed and shown as adapted for electric heat
ing, it will be readily understood that the same
may be heated by gas or the like, or in any other
suitable manner.
From the foregoing, it will now be seen that
there is herein provided an improved device ac
having transverse channels of substantially rec
tangular cross section therein, separable upper
and lower mold blocks positionable slidably in
said channels, means forming a plurality of
aligned grooves in each of said mold blocks, the
grooves in each upper and lower mold block co
acti-ng to form a plurality of cylindrical, bores
complishing all the objects of this invention and
adapted to receive a plurality of strands of a
others including many advantages of great prac
cable for simultaneous vulcanizing means form
tical utility and commercial importance.
10 ing grooves in the side walls of said channels,
As many embodiments may be made of this
apertured plates slidable in said grooves, screws
inventive concept, and as many modi?cations
"extending through said apertures in said plates, '
may, be made in the embodiment hereinbefore i?movable to compress said upper mold blocks
shown and described, it is to- be understood that
against said lower mold blocks, means for heat
all matter herein is to be interpreted‘merelye as“ 15 ing
the water in said water jacket, thermostatic
illustrative and not in a limiting sense.» F'
.7 means for controlling said heating means, and a
I claim:
safety valve on said water jacket.
In a device of the character described, in com-e ,
f bination, a receptacle forming a water jacket
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