DE463077C - Encapsulated switch box for rooms with flammable gases - Google Patents

Description

GERMAN EMPIRE

Bur. · ■■ ··· cigd
29AU & 2S2

ISSUED ON JULY 21, 1928

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21c GROUP

Patented in the German Empire on July 17, 1926

Switches for rooms with flammable gases are encapsulated to prevent pulling of the arc not to give rise to explosions. Along with the switch will be the associated fuses are also encapsulated, so that the contact points are washed around is avoided by flammable gases. Should now blown fuses be replaced or the switching

to be checked, the encapsulated switchgear must be opened, so that the explosion-proof protected arrangement of the electrical apparatus during this Time does not exist. It is therefore required

^ ert that the switch box is only open when the Can open the switch and it is impossible to reinsert the switch when the switch box is open.

This known task solves the

Invention in such a way that the

rectilinear guides of the switch box in the parallel sliding cover Forward «position of the switch is locked by parts of the ί

(. '. men of the switch for the parallel shift .ig release, whereby he, from his leadership: When pushed out, the switch box can be opened by opening it, at the same time but the switch shaft has the same locking parts in its "off" position blocked. The closure cover can be firmly connected to a hinge pin and be movable around this, which is designed as a locking rod for the switch shaft is. '

In the figures, an embodiment according to the invention is shown. Fig. Ι. Shows a perspective side view of the switch box, Fig. 2 a section through this. ψ

One or more square holders 12 and fuse elements 13 are located in the switch box 11 housed through openings 14, 15 after loosening the bolts ro and removing the cover 17, "18 closed from the outside 4; are accessible. The cover plates are on guides .19 of the control box 11 parallel movable. The guide 20 of the closure cover 18 for the securing elements 13 is cut out like a serrated 5 <on both guide sides and the cover itself with it one, hinge pin 21 firmly connected, the is stored at the points 22 of the control box r 1. The hinge pin 21 has at its upper end a recess 23, 5i into the one seated on the switch shaft 24 Disk 25 can intervene. The hand lever is seated on the other side of the switching shaft 24

*) The patent seeker stated as the inventor:

Dip! -Lug. Otto Neumann in Berlin-Wilmersdorf.

26, on which a locking part 27 is arranged, which with its protruding Part 28 behind an extension 29 of the * closure cover 18 takes effect.

The arrangement according to the invention works in the following way: To replace the Fuses are loosened the bolts 16 on the closure cover 18 and the one shown in FIG Switched position moved to the "Off" position. As a result, the locking part 27 is the extension 29 of the Closure cover 18 and the disk 25 engaging in the hinge pin 21 through its rectilinear part of the cap 18 free, so that this due to its own weight or is moved down by hand and is in its lowest position on the spring 30 located around the hinge pin 21. The lid 18 has daao moved by so far on the guide that the projections - and recesses of the serrated guides come into engagement with each other and dec closure lid 18 can be rotated around the hinge pin 21. Simultaneously with this parallel shift the hinge pin 21 is pulled down so that the rectilinear part of the Washer 25 rests against the straight part of the bolt and thereby switches on the switch makes impossible.

If the switch contacts are also to be examined, the Screws 16 of the cap 17 after moved down. As a result, the switch 12 is accessible through the opening 14. A open the cap 17 after loosening the bolts 16 in the arrangement shown upwards through the upper projections 31 attached to the switch box and prevented downwards by the closure cover 18. An opening of the switch box 11 is 12 when the switch is on not possible.

. The arrangement can also be applied to switch boxes that only have switches include, in which case the one closure cover 18 is omitted.

Claims (5)

Patent claims: 1. Encapsulated switch box for rooms with flammable gases, characterized in that that his closure cover can be displaced in parallel in solid, linear guides is locked in the "on" position of the switch by parts of the switch shaft that only open it afterwards of the switch for the parallel shift release, after which it is out of its guides pushed out, opening of the switch box allowed by opening, at the same time, however, the switch shaft is blocked in its "off" position via the same locking parts. 2. Encapsulated switch box according to claim i, characterized in that in the presence of several closely spaced, parallel displaceable closure covers, the first .parallel displaced and with the locking parts of the switching shaft cooperating cover from the guide by opening is removed, whereby the parallel movement of the second cover is only possible. 3. Encapsulated switch box according to An-Spruch ι and 2, characterized in that that the guides of the switch box and the lid are jagged. so that after the parallel displacement projections of one with recesses the other guide come into engagement and the lid can be opened. 4. Encapsulated switch box according to claim ι and 3, characterized in that that the closure cover is firmly connected with a hinge pin and around this is movable, which serves as a locking rod for the switch shaft. 5. Encapsulated switch box according to claim ι, 3 and 4, characterized in that that a spring is arranged on the hinge pin, which pushes the lid out of its guides wearing. 1 sheet of drawings