DE206842C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 206842 CLASS 21 /. GROUP

Company O. NEUPERT SUCCESSOR in VIENNA.

Patented in the German Empire on February 11, 1908.

The conditions applicable to the use of electric mine safety lights determine that the housings enclosing the electric generators should be built strong, must be made tight and impermeable to liquids, furthermore that the contact device must be set up in such a way that the closing or opening sparks can only occur if there is a safe exclusion of air.

ίο The fulfillment of the first condition, d. i. the airtight seal of the lamp housing is, with the previous electric miner's lamps not fully successful, as there is always a more or less large opening for the gases escaping from the accumulator in the Lamp housing had to be provided, otherwise the housing and the accumulator were damaged by the gas pressure.

A defect shortening the service life of the lamps mentioned above is that the with the same accumulators used, i.e. also the whole lamps always only in may be carried or stored in an upright position, otherwise the in the accumulator The sulfuric acid contained flows out and thereby the lamp housing in a very short time is eaten away, but at least the contacts oxidize and so the constant and reliable function of the lamp is very much in question.

This problem, which is not harmless and which also arises in lamps equipped with so-called dry accumulators, also arises from the fact that in these lamps there are no 40

Arrangement is made, whereby the bare metal parts of the housing interior, such as contact springs and wires, would be effectively protected from oxidation.

Finally, the contact devices of the known lamps are reliable in terms of their reliability and airtight closure is also not perfectly flawless. ■

The present invention prevents these inconveniences.

The switching device of the lamp is by an airtight seal in a known way, like such z. B. come in use with light or bell lines, against the Outside air completely securely closed.

A simple arrangement ensures that the gas flowing out of the accumulator can escape flammable gases directly to the outside and finally by installing a corresponding reservoir for absorption the acid flowing out of the accumulator if the lamp overturns damage of the lamp housing or the contact points.

These arrangements ensure that the requirements mentioned at the outset are precisely met. Provisions enables.

The accompanying drawing shows the lamp housing: A is a cylindrical housing used to hold the accumulator B , which can be equipped in a known manner with a lighting fixture C and, as required, with a hook, snap hook or handle.

The closure of the housing A is formed by the cover D, which is secured by a union nut E.

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is pressed airtight by means of the interposed rubber ring F.

Of the. Cover D carries a chamber G, into which a funnel-shaped bottom H extending into the interior of the housing is inserted, the outlet of which is connected to the accumulator cell B by a rubber hose /; asbestos or glass wool is stored in chamber G to prevent the accumulator

ίο absorb acid.

The fine bore ι in the chamber G allows the exit of the accumulator • lator escaping gases, the inside of the housing being completely tight against the lamp surrounding outside air is closed.

Of the two poles of the lighting fixture C, drawn one below the other in the figure, which protrude into the interior of the housing, one is connected to one pole of the accumulator by a wire spiral, while the other pole connection is interrupted by the switching device.

The switching device inserted in the cover D is operated by adjusting the screw K ; the lower end of the screw K carries a hemispherical extension L , which rests on a disk M made of soft rubber, which closes the switching device to the outside to be airtight.

When the screw K moves downwards, it pushes through the soft rubber washer M onto the by means of the hemispherical projection L. a spiral spring 2 held up contact piece 3 until its end touches the bracket 4 placed over the switching device und.so establishes the electrical connection between the accumulator and the lighting fixture, which again by moving the screw upwards. K is solved. The opening and closing sparks that occur in this case remain without any further harmful effects, as the switching device on the one hand completely seals against the outside air, but on the other hand, through the above-described connection of the inside of the accumulator with the chamber G in the cover D, the gases from the accumulator can escape into the outside air enables, therefore, an accumulation of flammable gases inside the housing is prevented.

When the lamp is tipped over, the accumulator acid runs through the hose / and funnel H into the chamber G, where it is sucked up by the asbestos or glass wool; when the lamp is set up again, the accumulator acid runs back through the hose / and funnel H into the accumulator.

This arrangement completely prevents damage to the interior of the lamp.

Claims (1)

Patent-An saying: Housing for electric pit safety lamps, characterized in that to prevent the accumulation of explosive gases in the lamp housing and to avoid damage to the inside of the housing or the contacts by accumulator acid flowing out of the accumulator cell in the cover (D) with a fine gas outlet opening (1) and with asbestos or Glass wool-filled chamber (G) is arranged, which is connected to the accumulator cell by a hose (J) , serves on the one hand to collect the escaping accumulator acid when the lamp falls over, on the other hand allows the gases forming in the accumulator to escape into the outside air, which at the same time allows the Entry of the potentially explosive gases surrounding the lamp housing into the interior of the lamp housing itself is prevented. 1 sheet of drawings.