US2075486A

US2075486A - Vulcanizing unit

Info

Publication number: US2075486A
Authority: US
Inventors: Henry A Van Dyke
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-01-09
Filing date: 1936-01-09
Publication date: 1937-03-30
Anticipated expiration: 1954-03-30

Description

March 30, 1937; H A VAN DYKE 2,075,486

VULCANI Z ING UNIT Filed Jan. 9; 1956 fr.- 35 F76. f

' I IN M y miHHIHHHUM I H INVENTOR. BY HENRY 4. MW Own-.-

ATTORNEYS Patented Mar. 30, 1937 UNITED STATES PATENT oFF1cE Application January 9, 1936, Serial No. 58,431

6 Claims.

This invention relates to an electrical vulcanizer and particularly to an electrical vulcanizer for vulcanizing patches upon rubber articles, such as tire tubes, rubber balls, bags, and the like.

An object of the invention is to provide an electrical vulcanizer which is so constructed as to eliminate the danger of injuring the article to which a patch is being vulcanized because of excessive vulcanizing heat.

A further object is to provide an electrical vulcanizer which can be used on the road to repair tire tubes or can be employed in garages, filling stations, and the like for the same pur- Another object is to provide an electrical vulcanizer which is simple in construction and relatively inexpensive to manufacture, and which can be easily used for vulcanizing rubber patches upon rubber articles.

Further and additional objects and advantages not referred to above will become apparent hereinafter during the following detailed description of an embodiment of the invention.

Referring to the accompanying drawing,

Fig. l is a side elevational view of the electrical vulcanizer embodying the present invention, the rubber article to which the patch is being vulcanized being shown in section;

Fig. 2 is a detail top plan view of one of the members of the electrical vulcanizer;

Fig. 3 is a sectional view taken substantially on line 33 of Fig. 2, looking in the direction of the arrows;

Fig. 4 is a detail top plan view of another member of the electrical vulcanizer;

Fig. 5 is a sectional view taken substantially on line 5-5 of Fig. 4, looking in the direction of the arrows; and

Fig. 6 is a fragmentary sectional view on an enlarged scale and is taken substantially on line 6--6 of Fig. 4, looking in the direction of the arrows.

The electrical vulcanizer comprises a suitable C-shaped member Ill, one arm of which is provided with an enlarged fiat article supporting plate or table II, while the other arm of the member It has at its end and above the plate II a boss I2 which is provided with a threaded bore in which is screwed a clamping bolt I3 carrying at its upper end a wing operating handle I4. The lower end of the clamping bolt I3 is provided with a reduced portion which engages in a recessed boss I5 on the upper side of a cup-' EISSUED shaped member I6 formed of suitable electrically conductive material.

The member I6 is provided with two binding posts I1 and I8 and the post I! is insulated from the member I6 and carries on its lower end and within the cup-shaped member I6 a spring contact finger I9 of electrically conductive material, which finger terminates adjacent the central portion of the member I6. A suitable piece of electrical insulating material 20 is secured in the bottom of the cup-shaped member I6, while the binding post I8 is in electrical circuit with the member I6.

A vulcanizing pad 2|, preferably in the form of a sheet metal cup, as clearly shown in Figs. 1, 4, and 5, is adapted to be positioned during the use of the electrical vulcanizer within the member I6. The pad 2I is provided adjacent its open end with a relatively thick insulating disk 22 and adjacent its bottom with a relatively thin insulating disk 23, it being noted that the disk 22 is provided with an elongated arcuate slot 22a for a purpose later to be explained.

A coiled electrical resistance element 24 is arranged between the

insulating disks

22 and 23, and one end of said element extends centrally through the disk 22 and has a portion lying exteriorly of the disk, as indicated at 25 in Figs. 4 and 5, while the opposite end of the resistance element is electrically connected to a rivet 26 which is carried by the insulating disk 22.

The rivet 26 carries in electrical contact therewith a spring contact finger 21 located in the slot 22a. of the disk 22, while the outer end of said finger overlies an opening 23a in the insulating disk 23, wherefore the outer end of the contact finger 21 can be brought into engagement withthe bottom of the cup-shaped member 2I and soldered thereto by suitable fusible solder 28, it being noted that when the contact finger 2'! is thus connected to the cup-shaped member 2I said finger is placed under spring tension.

The

disks

22 and 23 and the resistance element 24 are held assembled in the cup-shaped member 2I by means of tongues 2Ia which are cut out of the edge of the member 2I and bent down over the outer side of the disk 22. The member 2| carries on its under side a suitable patch 29, see Fig. 1, which is to be vulcanized to the rubber article, as will be well understood.

The binding posts I! and I8 are connected to suitable electrical conductors 3|] and 3I which may be connected to suitable clamps 32 which in turn can be electrically connected with the posi- I tive and negative terminal postsof a-batteryas represented by the conductors 33 and 34 in Fig. 1.

When the device is employed on the road or in other places where the only source of electrical current is from a storage battery, the clamps 32 are connected to the storage battery as just described. However, when the device is employed where a suitable source of commercial current is available, the device can be connected thereto through any suitable and well known transformer,

In operation; the article 35 to which the patch is to be vulcanized is positioned on the table II of the clamping member. Then the electrical vulcanizer, including the cup-shaped member |-6" with the vulcanizing pad or cup-shaped member 2| positioned therein, is located over the rubber article with the patch 29 carried by the member 2| in the location where it is to be vulcanized to the article. The reduced end of the clamping screw or bolt i3 is positioned in the recessed boss f5 of the member l6 and the screw then turned down to firmly clamp the members I6 and 2| against the rubber article. The clamping of the members l6 and 2| against the rubber article brings the end 25 of the resistance element into tight electrical contact with the end of the contact finger l6, wherefore, when electrical current is applied to the binding posts I! and I8, a complete circuit will be established through the contact finger l9, resistance element 24, contact finger 21, and the members 2| and I6. Assuming that the conductors 3|! and 3| are connected to a source of electrical energy, the flow of the current through the device, as just referred to, will cause the electrical resistance element 24 to heat up to produce the necessary heat for vulcanization, wherefore, since the patch 29 is held against the rubber article 35 under the pressure of the clamping screw l3, said patch will be vulcanized to the article. Inasmuch as excessive heat will have a deleterious effect upon the rubber article, it is desirable that the heat should not exceed a degree necessary to produce the desired vulcanization. The present construction is such that all danger of excessive heat being created with a consequent damage of the rubber article is eliminated during the vulcanization.

This is accomplished by the use of the fusible solder 28 for connecting the contact finger 21 to the bottom of the cup member 2|. When the heat created by the heating of the resistance element reaches a predetermined point, the solder 28 will fuse, and since the contact finger 21 has been placed under spring tension, when soldered to the member 2| said finger will immediately spring in the slot 22a from the full line position shown in Fig. 6 to the dot and dash line position shown therein, at which time the electrical circuit through the device will be broken.

7 From the foregoing description it will be seen that an electrical vulcanizer embodying the present invention is safe, can be used either with an electrical storage battery or with a source of commercial electrical energy, is easily assembled, and requires no particular skill in its operation.

Although a preferred embodiment of the invention has been illustrated and described herein, it should be understood that the invention is susceptible of various modifications and adaptations within the scope of the appended claims.

, Having thus described my invention, I claim:

1. A vulcanizing device adapted to be used with but readily separable from a suitable clamping means and comprising a pair of cooperating superimposed separable members, one of which is adapted to have pressure applied thereto by the clamping means and the other of which is provided with a vulcanizing patch for engagement with a rubber article, an electrical resistance element carried by one of said members which when energized creates the heat of vulcanization, and cooperating means carried by said members and coacting automatically when said members are arranged in the clamping means in superimposed relation and pressure is applied to the first named member by said clamping means to enable an electrical circuit to be completed through said resistance element.

2. A vulcanizing device comprising a pair of cooperating superimposed members, an electrical resistance element carried by one of said members and adapted to be energized to create the heat of vulcanization, one of said members being adapted to have pressure applied thereto by a suitable clamping means and the other of said members being separable from said first named member and said clamping means and adapted to carry a vulcanizing patch for engagement with a rubber article, and fusible means carried by said last named member for controlling the electrical circuit through said resistance element and which fuses at a predetermined temperature, whereby said last named member is destroyed by use andmay be discarded following the vulcanization process.

3. An electrical vulcanizer adapted to be used with a suitable clamping means and comprising two interfitting separable members, one of whichis adapted to be placed against the article to be vulcanized, an electrical resistance element mounted in said last named member, a spring contact finger carried by the other of said members and adapted to contact one end of said resistance element when the two members are positioned together so that an electrical circuit can be completed through said resistance element.

4. An electrical vulcanizer adapted to be used with a suitable clamping means and comprising two interfitting separable members one of which is adapted to be placed against the article to be vulcanized, an electrical resistance element mounted in said last named member, a spring contact finger carried by the other of said members and adapted to contact one end of said resistance element when the two members are positioned together, whereby an electrical circuit can be completed through said resistance element, and a spring contact finger electrically connected to the other end of said resistance element and having its end connected to the member carrying the resistance element by means of a soldered fusible connection.

5. An electrical vulcanizer adapted to be used, with a suitable clamping means and comprising a cup-shaped member formed of electrically conductive material and provided with a spring contact finger located within said member and terminating centrally thereof, a second cup-shaped member formed of electrically conductive material and adapted to fit within said first member but separable therefrom, and an electrical resistance element located in said second member and having one of its ends arranged centrally thereof and adapted to contact said contact finger when said members are positioned together whereby an electrical circuit. can be completed through said resistance element.

6. An electrical vulcanizer adapted to be used with a suitable clamping means and comprising a cup-shaped member formed of electrically conductive material and provided with a spring contact finger located within said member and terminating centrally thereof, a second cup-shaped 5 member formed of electrically conductive material adapted to fit within said first member but separable therefrom, a pair of insulating disks arranged in said second member and having a resistance element located therebetween, one end 10 of said resistance element extending through one of said disks and adapted to contact said contact finger when said members are positioned together, the opposite end of said resistance element being connected to a rivet carried by said last named insulating disk, and a spring contact finger having one end electrically connected to said rivet and said element and its opposite end electrically connected to the bottom of said second named member by means of a fusible soldered connection.

HENRY A. VAN DYKE.