DE389575C - Multiple fuse with exchangeable, superimposed insulating bodies containing the fusible wires - Google Patents

Description

GERMAN EMPIRE

ISSUED
AI FEBRUARY 5, 1924

REICH PATENT OFFICE

PATENT LETTERING

389575 - CLASS 21c GROUP

(St35931 Vni / 2ic ^s J

Heinrich Starker in Stuttgart.

Patented in the German Empire on July 8, 1922.

The subject matter of the invention relates to a multiple fuse. At acquaintances Versions are the individual fusible wires between thin-walled insulating washers placed, or they lie in outwardly open, annular grooves of a disk-shaped Insulating body.

In contrast to these embodiments, according to the invention, the individual fusible wires are embedded in radial bores or transverse channels of a full, disk-shaped or drum-shaped insulating body. The surrounding massive insulating layer completely separates the individual. Fusible wires from one another, so that no mutual influence whatsoever is possible when the fusible wires burn through. In a known manner, several drums containing the fusible wires are placed one on top of the other. In order to switch the fusible wires into their respective contact position, according to the invention, only the uppermost drum can be rotated, while the drums underneath remain stationary in the surrounding housing so that they cannot be rotated. In order to make it easy to remove and replace the individual drums from their guides, these are expediently provided with slots or recesses. As a result, when replacing a drum, for example, only the housing cover needs to be pushed upwards a piece corresponding to the height of the same; the drum can then be easily removed from the side.

One possible construction of the invention is described below. Fig. 1 shows a longitudinal section, Fig. 2 shows a cross section in the direction AB and Fig. 3 shows a view with the housing raised

Claims (3)

cover and rearward drum of the multiple fuse. Fig. 4 shows the fusible drum individually. The multiple fuse consists of a housing part ι made of porcelain, which carries the metal screw thread 2. In the housing part ι a center contact pin 3 is fastened in plaster. This gives, together with a pipe section 4, which is also plastered in part 1, the longitudinal guide 5 (Fig. 2) for the fusible link drums 6 inserted in part 1. B. four such drums placed on top of each other. Each fusible link drum has a plurality of fusible wires 8 running radially in transverse channels 7, the ends of which are soldered into contact pieces 9 and 10. Each contact piece 9 has a trough 11 for locking the switched-on position of the associated fuse wire 8. Simultaneously with the fuse wires 8 in the contact piece 9, wires soldered together form the known display device 12 for the consumption of the fuse in question when the wires 8 melt through. A radial recess 13 provided in each drum is guided up to the longitudinal guide 5 of the contact piece ι ο. A contact bolt guide piece 14, which is soldered to the pipe section 4 and the thread 2, engages from the outside in the recesses 13 of the three lowest fusible link drums 6 shown in the drawing Switching ring 16 taken along. The individual contact pieces 9 are switched via the contact pin 17 of the guide piece 10, which is under the action of a spring 18. In the drawing, for example, the third contact piece is drawn above the contact bolt 17. The ring 16 is secured against longitudinal displacement by a shoulder 19. A central spring 20 presses with the interposition of a disk 21 against the drums 6, the upper surface of which leans against the lower surface 22 of the cover 23. The cover 23 is longitudinally guided in a non-rotatable manner on a rierkantfläche 24 of the bolt 3. In this case, the cover is pressed onto a shoulder 26 of the bolt 3 by a counter-pressure spring 25 which exceeds the pressure of the spring 20. The difference in height between the bolt shoulder 26 and the housing part 1 is of course dimensioned so that the ring 16 can still be rotated. The counter-pressure spring 25 finds its upper stop on a screwed and secured nut 28 on the bolt 3. The cover 23 can be lifted upwards by overcoming the spring pressure of the counter-spring 25 to remove the individual fusible link drums 6 (Fig. 3). The subject matter of the invention is handled in such a way that after a wire has been melted, the ring 16 driving the drum by means of the nose 15 is rotated until the contact pin 17 engages in the contact piece trough 11 of the next fusible wire contact piece 9, the switching position being controlled by a button on the ring or cover attached scale can be read. The circuit is then closed again via thread 2, spring 18, bolt 17, fuse wire 8, contact piece 10 and bolt 3. After all the fuse wires in a drum have been used up, the cover 23 is lifted up. The upper fusible wire drum, which is lifted up by the spring 20, is removed laterally through the gap 27 that is created as a result. As the next drum immediately comes to the first place, it is immediately ready for use when the lid flips back. To refill the drums, push the drum down with a thin tool inserted between the drum surface and the cover until the next one can be pushed in from the side, etc., whereby the housing is filled with fresh fusible wire drums. Patent-A ν sr κ c c he: 1. Multiple fuse with interchangeable, stacked, the Insulating bodies containing fusible wires, characterized in that a number of fusible wires in radial outer channels a full, drum-like insulating body, separated from one another by the insulating compound, is embedded, and for new contact setting the upper fusible wire drum is rotatable while the rest of the rest is at rest. 2. Multiple fuse according to claim ι, characterized in that the Replacement of the top drum in each case is made possible in that the drums each have a radial recess (13) are provided, whereby they are no between the lifted cover (23) and the upper edge of the housing (1) are removed from their guide (3) can. 1 sheet of drawings.