US677399A - Electric vulcanizer. - Google Patents

Description

(No Nadel.)

Patsnted July 2, |90I.

A. .'x. connu. ELECTRIC VULCNIZER.

(Appuatiun am sept 1o, 1900.)

2 Sheets-Sheet I.

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Patented July 2, lm'.

A. J. NLIN.

'ELECTRIC VULCNIZER. u "mm @Pham med mi' m' Hoof) 2 sheets-sheet 2.

` UNITED STATES PATENT OFFICE.

ANDREW J. CONL'IN, OE4 CAMBRIDGE, MASSACHUSETTS, ASSICNOR To THE SIMPLEX ELECTRICAL COMPANY, OE BOSTON, MASSACHUSETTS.

.ELECTRIC VULCANI'ZER.

SIPECILIICATIN forming partof Letters Patent No. 677,399, dated July 2, 1901. y Application filed September 10,` 1960. Serial No. 29,543. (No model.)

T dll whom, t may concern."

Be it known that I, ANDREW J. CONLIN, a citizen of the United States of America, and a resident of Cambridge, county of Middlesex, and State of Massachusetts,have invented certain new and useful Improvements in Electric Vulcanizers, of which the following is a specication.

This invention relates to the vulcanization of rubber insulation for electric wire by means of heat generated by electricity. Its object is to provide an apparatus whereby a perfect insulation may be made at the junction of the ends of two wires by the union of new and old materials under the influence of heat generated by electricity. A uniform temperature, which is essential to good vulcanizing and difficult to attain by means of steam-vulcanizers and other old forms of vulcanizers, is obtained y the use of my invention, as well asa device moreconvenient and simple in operation ythan those now in use, portable, and adapted for use out of doors and in places difficult of access, such as trenches. n

My vulcanizer consists of an electricallyheated tubular mold having an upper and aV lower Clamping ymember adapted to'receive anV insulated wire. p

An embodiment of my invention is shown in the accompanying drawings, in which- Figure l is a front elevation of my electric vulcanizer. Fig'. 2 isa vertical cross-section of my electric..vulcanizer through the line X Xy in Fig. l, showing the upper clamping member in elevated position. Fig.,3 is an end elevation of my electric vulcanizer. Fig. 4 is a diagram of the electrical heater-coil in the upper clamping member of the vuloanizerr viewed from above. Fig. 5 is a diagram of the electrical heater-coil in the lower clampf ing member of the vulcanizer viewed from above; and Fig. 6` is a diagram ofthe rheostat in the base of the machine, which'controls the amount of heat in the lheating-coils, viewed from underneath. v

Like parts are indicated by like letters in all the figures.

A and B are the upper and lower members,

respectively, of a tubular mold adapted to receive insulated wire. Said members A and B are filling-blocksy removably fitted into the two members C and D, respectively, of the clamp. Instead of using filling-blocks it is obvious that said members C and D may be so formed on theirinner faces as to serve as the mold; but it is preferable to use iillingblocks, so that molds may be used having different-sized bores adapted to receive dierent-sized wires.y The members ,C and D vof the clamp are journaled together at E, and the lower member D is mounted on a base F by ostat H, having the switch or lever I pivoted 'at J and adapted to sweep over'the'contactplates or segments jj. The lever I is connected at J by the `wire dwith the bindingpost g.

d is a heater-coil embedded in the enamel 1c of the rheostat within the base F.

The contact-plates17` 7' are provided with stems Z Z, which pass through the base F and the enamel 7e and are connected by the loops of the coil a, as shown in Fig. 6.

The clamping members C and D are provided, respectively, with the spring Contact` members `o o and p p', wh'ich'oomplete the lcircuit around the mold, as hereinafter described, when the clamping members C and D are closed and break the circuit when it is opened. On the convex side of said. clamping membersis a coating of enamel 7e and 7a2, in which are embedded the heater-coils c and b, respectively. Lids or covers M'andA N,se cured to the clamping members by small screws q q, protect the enamel Zo and k2 and alsoserve to retain the heat. g Theair-space between said .lids and the clamping members to which they are attached materially aids in their function of retaining the heat. clamping member and its lid, as above described, forms a clamping part having an inner and an outer shell with an air-space between. n

Each

IOS

From the stem or post Z of the end segment j leads the wire e, which passes u pward'through the hole m in the base F and terminates at the post e', Fig. 5. V From e' connection is made through the heater-coil b, contacts p and o, heater-coil c, contacts o and p', wire f, which passes from contact p downwardV through the v hole 'n in the base F to binding-post h. The

wber, the latter being mounted upona base binding-posts Lh and g are provided with the usual holes for receivingsthe lineLwires and screws for binding the'wires inplace.

The operation of my vulcanizer is as tol-v lows: The ends of the rubber-insulated wires which it is desired to unite are scraped. bare of their insulation a snflicient length to er1:-

together.

portion ofA the, wire from which the insulation has been removed. f To vulcanize this uncured insulation, the ,upper clamping member C is raised', as shown in Fig. 2, and thewire is put between the members Aan-d B 'ofthe mold. The clamp is then closed, the pin Q is swung into the notch in the lug P, and the screw Sv set firmly down upon lugP. By the closing of the clamp the contactso and p and oand p', respectively, are closed, and' thereby the y;

heating-coil circuit is closed. The amount of heat required to properly vulcanize the rnbber can be ascertained by experiment and contr'olled by the lever I of the rheostat in the base. F. The vulcanizer may be bui-1t for a current of any standard numberof volts, and it' any other voltage is used a transformer may be employed.

The object inmounting the clamp u portaind in close proximity to the rheostat inthe base is not only to providea convenient and com- 5 t ;sisting of -two parts jo-urnaled together and means for vclamping said. parts togetl1er,eacl1 lof said clamping parts consisting of an inner and an outer'shel-l with an ai'rspa'ce between, i electrical heating resistances on the enter side of the inner shells, a tubular mold within' pact means for controlling the current inthe heater-coils b and c,/`but the rheostat being itself a heater its heat is not wasted, but materially aids in warming the moldv and mainftaining it at an even temperature.

ber, the lower member being mounted upon a base andy in close proximity thereto, a rheostat within said base, an electric heating-coil s ubstanti all y surrounding said mold and' electrical connections between the heating-,coil

and the rheostat.

2` In an electric-vulcanizer a tubular mold f What I c-lainnand desire to secureby Letfl having two clamping members, oneA of said members being mounted upon a base and in close proximity thereto, a rheostat within said base, an electric heating-coil substantially surrounding said members, electric contacts borne by saidclamping members, and adapted to close" the heati-ngcircuit simultane ously with the mechanical closing of the mold,

lelectrical connections between the heatings coil and the rheostat.

3. In an electric vulcanizer va tubular mold having an upper and a lower clamping memand' in close proximity thereto, a rheostat within said base, 'anenamel heating-coil on the outer side of each of said members, covers adapted to protectfsaid enamel heating-coils,

` au tomatic'sprin-g-eontacts borneb-y said meml bers adapted toclose the heatinghcircuit si' multaneously with the closing of the mold,

and electrical lconnections .between the VVrheoj' stat and the heating-coil.v Y Y 4. In an electricy vulcanizer a clam-poen# sisting of two parts journaled together 'and cachot said clam-ping parts, la tubular mold removably fitted within said clamping parts,

i means for clamping said parts together, electrical heating resistances on the onto-r side of spring-contact members borne by said cla1np in-g parts and adapted to close'the heating- ,coil circuit simultaneously with the closing l together of the clamps, anda rheostatr in close proximity to said clamping parts and controlling the amount of heat in the heating resistances. v t Y V 5. In anelectric vulcanizer, a clamp con#A sisting of two parts journaledtogether and A meansA for'clampingsaid parts together, each j of said clamping parts consisting of an inn-er and an outer shell with an air-space between,

electrical heating resistances-on theonter side' of the inner shells, and atnbularmoldY within jsaid clamp.

6. In an electric vulcanizen a clamp VconsaidV clamp, and a riieostat in close proximity IOO to said clamping. parts, and con-trolling the amount of heat in the heating resistances.

Signed by me at Boston, ltiassachusetts, this 23d' day of August, 1900.

Witnesses :y FRANK S. HARTNETT, ROBERT CUsHMAN.

'ANDREW J. CONLIN.

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