US1529216A - Fused switch - Google Patents

Description

March 10, I925- 1,529,216

- J. sAcHs FUSED SWI TCH Filed Jan. 1925 2 Sheets-Sheet 1 a side view of the same.

Patented Mar. 10, 1925.

PATENT OFFICE.

JOSEPH SACHS, OI HARTFORD, CONNECTICUT.

FUSED SWITCH.

Application filed January 25, 1923. Serial No. 61,4,8Q7.

To all whom it may concern:

Be it known that I, J osnrrr SACHS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Fused Switches, of which the following is a specification.

This invention relates to the class of knife blade switches on which are mounted en closed fuses. In this type of devices the switching element comprises two conducting blades mechanically joined but electrically separated by insulation, with a clip for recelving the terminal of an enclosed fuse electrically connected with each blade, one blade being pivoted to a conducting clip secured to an insulating base and the other blade being adapted to be swung into and out of engagement with another conducting clip fastened to the base.

The object of this invention is to provide a cheap but very rugged construction which may be readily employed to receive the terminals of the common type of enclosed fuses and hold them close to the switching blades, thus ensuring acompact structure which is particularly serviceable when the switch is located in an enclosing box as it enables the height of the box to be reduced.

The conception is applicable to the construction of one, two or more pole switches but in the accompanying drawings only one switching element is illustrated. Fig. 1 is a top view of a switching element constructed according to this invention, provided with clips for receiving the terminals of a knife blade type of enclosed fuse. Fig. 2 is Fi 3 is a view of one end. Fig. 4 is a view the other end. Fig. 5 is a view of one of the fuse clip saddles. Fig. 6 is a top view of a switching element provided with clips for receivin the terminals of a ferrule type of enclose fuse. Fig. 7 is a side view of the same. Fig. 8 is aview of one end. Fig. 9 is a view of the other end. Fi 10 is a view of one of the saddles used fl ir mounting the ferrule fuse clips.

The base 11 of this switch is usually made of porcelain of a length depending on the le h of the switching element and of a ing elements to be mounted thereon. Securednear one end of the base is a conducting clip 12 provided with circuit wire attachn wi th depending on the number of switching means 13 and secured near the other end of the base is a conducting clip 14 provided with circuit wire attaching means 15.

Held by the pivot 16 between the ears of the switch clip 12 is a conducting blade 17 and adapted to swing into and out of engagement with the ears of the switch clip 14, when the switching element is turned on the pivot, is a conducting blade 18. Slid upon the shank of each of the switch blades is a saddle 19 of conducting material. The shanks of the blades are slightly reduced in width and the saddles have slots 20 that fit the reduced sections of the blade shanks, which are, after the saddles have been placed thereon, staked or slightly swaged up as illustrated at 21 in Figs. 2 and 7 for retaining the saddles firmly in position and ensuring good electrical connection between the blades and saddles. After the saddles have been secured on the blades the shanks of the blades are fastened by rivets 22 between two insulating plates 23 which securely join but electrically insulate the bladesand saddles at the opposite ends of the switching element. The upper ends of the saddles are bent at right angles so as to have a section 24 extending parallel with, and but a little distance above the blades.

In the form first illustrated the edges of the upper sections of the saddles are turned down to form ears 25 as shown in Fig. 5 and fastened to these cars by rivets 26 are the lower ends of the conducting spring fingers 27 which form the clips that are designed to receive the terminals of a knife blade onclosed fuse. One or both of the saddles may be extended and bent upward to form a lug 28 as shown in Fig. 2 for receiving a terminal of a meter testing apparatus when desired. Fastened to the rupture or swinging end of the switching element by rivets 29 is an insulating coupling piece 30 which has a slot 31 designed to receive the cross bar 32 of the crank rod that is commonly emplo ed to 0 en and close these switches when t ey are ocated in an enclosing case.

In the second form illustrated attached to the upper sections 24.- of the saddle by rivets 33 are clips 34 made from single pieces of conducting metal bent to receive the terminals of enclosed fuses of the ferrule contact 81 18 saddles are simple and cheap to manufacture and assemble on the blades and the fuse clips are easily attached to the saddles. The insulating plates are very strongly fastened to the blades which pass through the slots in the saddles. The strains on the means which fasten the shanks of the blades to the insulating plates in opening and closing the element from the terminal clips, are sustained to a great extent by the fact that the ends of the plates butt against the inner faces of the saddles which are strongly secured to the blades and the strains of applying and removing a fuse from the fuse clips are transmitted through the saddles directly to the blades. This forms a very rugged structure and ensures good switching connections and fuse connections for an indefinite period. Furthermore when the fuses are applied to the switching element they lie relatively close thereto so that they will not take up much room when the switch is placed in an enclosing box.

The invention claimed is:

1. A fusible switch comprising a pair of conducting blades, a air of insulating plates mechanically joining and electrically insulating said blades, saddles of conducting material having sections fitted upon and secured to the blades adjacent to the ends of the insulating plates and overlying sections bent outwardly therefrom and extending over the blades, and fuse receiving clips fastened to the overlying sections of the saddlesabove the blades.

2. A fusible switch comprising a pair of conducting blades, insulating material mechanically joining and electrically insulating said blades, saddles of conducting material having sections fitted upon and secured to the blades and overlying sections extending at an angle thereto, said overlying sections of the saddles having downwardly extending ears, and fuse clip fingers secured to said ears.

3. A fusible switch comprising a pair of conducting-blades, insulating material mechanically joining and electrically insulating said blades, saddles of conducting material having sections fitted upon and secured to the blades and overlying sections bent outwardly therefrom extending over the blades, the outer end of one of the sad- -ing material having slotted dles being extended upwardly to provide a testing lug, and fuse receiving clips fastielned to the overlying sections of the sad- 4. A fusible switch comprising a pair of conducting blades, insulating material mechanically joining and electrically insulating said blades, angular saddles of conductsections fitted upon and secured to the blades and sections bent upwardly and overlying the blades, and fuse receiving clips fastened to the overlying sections of the saddles above the blades.

5. A fusible switch comprising a pair of insulating plates, conducting blades with their inner ends secured between said plates, saddles of conducting material fitted upon and secured to the blades adjacent to the ends of the insulating plates, said saddles having outwardly bent sections extending above the blades andfuse receiving clips fastened upon the overlying sections of the saddles above the blades.

6. A fusible switch comprising a pair of conducting blades, insulating material joining but'electrically insulating said blades, angular saddle plates of conducting material having perforated vertical sections fitted to the blades and horizontal sections overlying the blades, and fuse receiving clips secured to said overlying sections of the saddles.

7 A fusible switch comprising a pair of conducting blades, insulating materlal mechanically joining but electrically insulating said blades, angular saddle plates of conducting material secured to the blades, said plates having vertical sections attached to the blades and horizontal sections extending parallel to and above the blades, and fuse receiving clips fastened upon the sections of the saddles that are parallel to the blades.

8. A fusible switch comprising a pair of conducting blades, insulating material mechanically joining but electrically insulating said blades, angular saddles of conducting material having legs fitted upon and securedto the blades and legs extending at right angles above the blades, and fuse recelving' c ips fastened to said upper legs of the saddles.

JOSEPH SACHS.

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