DE55908C - Safety gas burner - Google Patents

Description

IMPERIAL

PATENT OFFICE.

Safety gas burner.

The "present invention relates to a safety gas burner in which to prevent the outflow of gas when the burner tap is not closed and the main tap is open, it automatically shuts off is effected by a special self-closing safety valve.

As can be seen from the accompanying drawing, the new safety burner is formed from two shells AA ¹ , which are screwed together at α. The lower shell A is funnel-shaped and forms an extension of the burner tap B, which is provided with a thread b for screwing onto the gas line. The cock plug c is provided with the angular bore c ¹ through which the gas enters the interior of the shells AA ¹ . A screw nut d holds both the cock plug c in the bore of the cock, as well as a tongue e placed on the plug d by means of a wedge and groove or square in such a way that it rotates simultaneously with the plug c .

The upper shell A ¹ is cylindrical in shape, with a funnel-shaped depression in the middle into which the burner g is screwed.

At the bottom of the funnel is a plate g ¹ provided with an opening h , in whose bent tubes i an angled lever k can be moved in a hinge-like manner. A plate-like valve / is attached to this lever k; a spring m fastened at P presses against the leg k ^{l of} the lever k and thereby the valve / against the opening h, the same hereby finally, FIG. 1.

A split ring 0 made of easily expandable metal is arranged adjacent to the upper edge of the shell ^{A 1.}

It is the same through two open rings that fit into one another and are connected to one another, the open areas of which do not lie on top of one another, but rather displaced somewhat, formed, FIG. 4.

The end o ^{1 of} the ring is only attached to the side wall of the shell A ¹ by the screw η , so that the ring, which is slightly smaller in diameter than the inner diameter of the shell A ¹ , can expand and contract again when heated . At the fixed end o ^{1 of} the outer ring part a small, upwardly standing pin p is drilled, at the free, movable end o ^{1 of} the inner ring part a similar pin p ^{x is} drilled. A curved sheet q is provided at one end with holes corresponding to the pins ρ ρ ^ι and placed on the ring 0 via these pins. The leaf spring r fastened to the ring ο by means of screw q ¹ presses on the leaf q and prevents it from loosening from the pins pp ^l .

At the other end of the leaf q , a small rack s is attached to one ear q ² , easily rotatable about a pin. A bend i ¹ forms a stop of the same on the sheet q, FIG. 5.

On the ring 0 itself, opposite to the split of the same, a fixed blade t with a small shoulder t ¹ is attached by a screw or a rivet n> , Fig. 5. To this blade t, on the side where the shoulder t ¹ is located, a spring u attached to the valve lever k fits tightly against it.

It is directed in such a way that when the valve is closed it ^{lies above the extension f 1} , FIG. If the valve is opened, ie the lever k is pulled down with the spring u , the latter lies under the extension t ¹ , prevents the lever k from going up in this position and thus holds the valve in the open position, FIG. 2 The rack s is easily movable upwards with one of its tooth cutouts always on the upright edge of the spring u.

The mode of operation of the automatic closure on this burner is now as follows:

The valve /, which is always closed when the burner is cold, is opened at the same time when the burner tap B is opened by turning the cock plug c , since the leg A: ^{1 of} the lever protrudes into the rotational path of the tongue e and is pushed back by this as soon as the chick turns. Here, with the lever k, the spring u on the leaf t is pulled down to below the extension i ¹ , under which it is stuck and, as already noted, keeps the valve open.

In inflamed gas flame is now heated the upper shell A ¹ and consequently the close-fitting to the same ring 0 such, that he is significantly expands. Since this expansion takes place towards the free end o ^{2 of} the ring 0 which is not attached to the shell A ¹ , ie this end moves away from the attached end o ¹ , the blade q with the rack s also retracts. The pins pp ¹ act here eccentrically; Since the upper fixed pin ρ forms the axis, the blade q and with it the rack s slide back when the ring diverges. If the flame is now extinguished, e.g. B. by turning off the main tap of the line, the shell A ¹ cools and with it the ring ο. As a result, the latter contracts again, ie the end o ² approaches the end o ¹ again, the eccentric pins ρ ρ ^ι now push the blade q with the toothed rack forward, the spring u located in a tooth incision is also moved away - and thereby pushed out of the extension ^{i 1} , so that the lever k with the valve Z is pressed unhindered by the spring m upwards against the opening h and this is completely closed.

Gas escapes when the main valve is reopened through the burner excluded, even if the burner tap was not closed.

The new burner therefore enables all gas flames in a pipe to be extinguished from one point, d. H. by closing the main valve.

In order to prevent the entry of impurities into the interior of the burner, a fine wire screen ν is arranged in the burner tap B in front of the inlet opening.

Claims (1)

Patent claim: A self-closing safety gas burner, in which to prevent gas from escaping through the burner when the burner tap is not closed and the main tap is open, an inside of the shells AA ^1, which expands due to the heat of the gas flame, after the flame has been extinguished and has taken place cooling again contractive ring 0 means eccentrically on a sheet q rack-s-acting pins pp ¹ a spring and of a neck i ¹ of the sheet t triggers, whereby a k on the lever befindliches valve I through the action of a spring m on the lever leg k ¹ pressed against the gas outlet opening h and this is thus closed. For this purpose ι sheet of drawings.