US1541305A - Multiple-fuse plug - Google Patents

Description

June 9, 1925.

G. T. wooDlN MULTIPLE Fussf'PLuG Filed July s, 1921 ffm Patented June 9, 1925.

Unirse STATES PAT-ENT orifice.

'GEORGE TsWGODIL NEWPORT, NEW YORK, ASSIGNOR OF ONE-HALF TOWILLIAM S. TEOBIPE, 0F LAKEWOOD, -0HIO.

MULTIPLE-FUSE PLUG.

Application med my' ao, .1921. seriarNO. 488,520.

To all whom z't may' concern:

Bey it known that I, GEORGE T. 'WooDIN, ya citizen vot" the United States, residing at Newport, in the `'county of Herkimer and `State of "New York, khave invented a certain new and 'useful Improvement'in 'Multi'ple-Fuse'Plugs, of 'which the following is a full, clear,'and'exact description, reference being had to the accompanying drawings.

This invention relates to multiple fuse plugsand has for its general object to provide a plug which shall combine efficiency with convenience of operation, simplicity and'compactness of construction, and econ- `omy of production. 'I accomplish the forevgoing objects, and other and'more limited objects which will appear hereinafter, in and through the construction and arrangelnient of parts shown in the drawing forming lapart hereof, wherein Fig. 1 represents a central longitudinal sectional view through a multiple fuseplugembodying my invention, the central Contact, somerof the parts "connected thereto, and `the fuses being shown in elevation;Fi`g. v2 la plan view of the( base, 'corresponding substantially to the line 2-2 of l; Fig. 3 a bottom plan 'view'of the cap, corresponding substantially to the line 3 3 of Fig. 1; Flg. 4 a bottom plan view of the magazine part of the base, corresponding substantially to the line 4-4 of Fig. 1; Fig. 5 a detail in section corresponding to the line 5 5 of Fi 3; and Fig. 6 an enlarged sectional detai showing the manner of su porting the contact arm from the capk an of establishing contact between said arm and the central contact.

Describing the various parts by reference characters, 1 denotes the up er magazine member and 2 the lower soc et-connection member of a base. The member 2 is provided with the usual shell plug contact 3 which is adapted to fit a threaded socket shell contact (not shown). The upper end of the sheet metal of which the contact 3 is composed is flanged inwardly above a flat seat 2 on top of the member 2, the fiange constituting an annular contact surface 4. p

The upper member 1 of the base is cylindrical in shape and is provided with a plurality of bores 5 located within and near the peripheral portion thereof. Six such bores are shown, spaced equidistantly apart and `equidistantly from the center or axis of the said member.

6 denotes an annular contact plate secured inlany suitable manner to the vbottom of the member l and extending Abeneath andy closing the) bottomsof the bores The inner edge 6 of this plate rests upon and forms an electrical contact lwithin the annular contact surfacell. The member 2 is provided with acentral recess 2b in the top thereof land theemember 1 with aY cor- 'at-1F and 2, and is-provided within-a recess 9 in the upper yend of the member 1 with-a nut 10 whichserves to draw and Ihold the members land v2l rigidly together. j Mounted within the bores or chambers 5 are the fuses,3 each fuse being `of the cartri'dgetype vand 'consisting' of an ordinary `fuse wire (not shown) having its ends'in electrical rcontact with the opposite Vmetallic ends 11a of-a casing 11. In 'order' to insure an efficient contact between the lower ends of the casings 11 and the plate 6, the latter is embossed upwardly beneath each such container, as indicated at 6*.

Rotatably mounted upon the base and carrying a contact arm electrically connected with the contact 7 is a rotatable cap 13. The upper peripheral portion of this cap is pre erably lrnurled, as indicated at 13, the cap being provided with a skirt 13h depending from the body thereof and overlapping the upper end of the member 1. The cap is provided withacentral bore 13c having annular extensions 13dl and 13e at the top and bottom thereof, respectively. Mounted .in the annular extension 13 is a sheet metal hub 14 carrying a contact arm 15. This arm is downwardly convex in cross section, as will appear from Figs. 5 and 6, whereby its lower surface tends to lie below the tops of the fuse casings, but the arm is enabled to ride up on top of the said casings as it is rotated by the cap. The hub 15 is clamped to the cap by means of a sleeve 16 having a head 17 at the lower end thereof adapted to engage the hub, the said sleeve fitting within the boi'e 13" and being internally threaded. This sleeve is secured in place b y means of a second sleeve 17 threaded thereinto and having a head 18 atapted to fit within the recess 13m. The sleeve 17 is threaded upon the contact 7, which can turn freely within the bore 2C.

lVith the parts constructed and arranged as described, the operation will be readily understood. The base is screwed into its proper socket, with the arm 153 pressing downwardly upon the top of a casing ll whereby, when a switch is closed at the proper place, a circuit will be established through the shell plug contact 3, plate appropiiate fuse in the casing ll, arm l5, members 16 and 1T, and central contact 7. Should the particular' fuse wire in use burn out, it is necessary only to turn the cap l?) sixty degrees, thereby bringing the contact arm l5 into engagement with the top ot' another fuse casino', whereupon the circuit will again be established through the fuse plug. The shape of the arm l5 will enable the operator to determine by the sense of feeling when the said arm has been moved a sullicient distance to engage the top of a use casing. Furthermore, the member l and the skirt 13b will in practice preferably be provided with suitable indications adapted to register when the contact plate l5 is in ope 'ative relation to each ot' the fuse casings. The top ot the cap 13 will also be provided with an arrow indicating the direction of rotation, thereby to prevent moving the arm 15 above and in engagement with the casing of a burned-out fuse.

iVhen all ot' the fuses have been burned out, the 'ap may be easily removed and new cartridge fuses inserted into the chambers 5.

Having thus described my invention, what upwardly in each of said chambers, a iluse casii'ig in each chamber adapted to engage the embossed portions of the plate at their lower ends respectively, and an arm iu electrical engagement with the`other oit said contacts and adapted by its rotation to engage the upper ends ot the said casings suecessively.

2. A, device o'f the character described comprising a shell plug contact member and a magazine member, a central contact member uniting the lirst two members, fuse casings in the magazine member and grouped about the central contact member and in electrical contact with the shell plug contact, a contact arm cooperating with said fuse casings, and having a central collar or hub, a rotatable cap having a central opening registering with the opening in said hub or collar, a sleeve mounted in the bore of said cap and having a head adapted to engage the hub or collar, and a sleeve threaded into the first mentioned sleeve and to the central contact.

In testimony whereof, I hereunto ailix my signature.

(lflOll-Gll T. VOODIN.

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