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Aug. 27, 1946: c. D. "DAVIDSON 2,406,455 VULCANIZING UNIT Filed Feb. 5, 1945 ,I| ll || '2 Sheets-Sheet 1 \\ ‘I/H. w|I ‘ 61 ' , ' 1I~/ I ~ 10 woollloolliool 1 I _@6 i'loonooa'looi. |20 120 , [.1 ll f7/”igov|liol!ooi! lr' "at 11/1 , 77,) . .. L18 9mm pay/am. MM ' Aug 27,1946. I (3, D, DA\‘/|D_soN v 2,406,455 VULGANIZING UNIT Filed Feb. 5, 1945 2 Sheets-Shee£ 2 @1139. z. Inventor 'g/rf/D. pair/330a. ' ‘ and?may?més v v 2,406,455 Patented Aug. 27, 1946‘ UNITED STATES- PATENT OFFICE 2,406,455 VULCANIZING UNIT Cyril D. Davidson, Washington, Pa. Application February 5, 1945, Serial No. 576,266 1 Claim. 1 (Cl. 18-6) 2 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 device, . . . 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 left. 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 ings. Having reference now to the drawings, the 2,406,455 3 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 4 . 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 CYRIL D. DAVIDSON.