US1075159A - Gas-controlling means for regenerative furnaces. - Google Patents

Description

W. REITMEISTER.

GAS CONTROLLING MEANS FOB. REGENERATIVE FURNACES.

APPLICATION FILED FEB. 6, 1913. Lfiw l 59. Patented 001;. 7, 1913.

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WILHELM REITMEISTEBI, OF SIEGBUBG, GERMANY.

GAS-CONTROLLING- MEANS FOR BEGENERATIVE FURNACES.

Specification of Letters Patent.

Application filed February 6, 1913.

To all whom, it may concern:

Be it known that I, VVILHELM Rnrrrrnrs- TER, a citizen of the German Empire, residing at Siegburg, in the Province of Rhenish Prussia, Germany, have invented certain new and useful Improvements in Gas-Controlling Means for Regenerative Furnaces, of which the following is a specification.

This invention relates to that type of gas reversing valve for regenerative furnaces in which the gas stop valve is connected in such a manner to the reversing valve that it is closed during the reversing to prevent losses in gas. According to the known reversing valves of this type a special regulating valve must be provided, in addition to the stop valve, which according to the requirements of the furnaces regulates the supply of the gas to the latter.

The present invention permits of the regulating of the gas supply to the furnace by the stop valve which is controlled by the reversing valve without aflecting the reversing valve. For this purpose the transmission of the movements of the reversing valve is effected, according to this invention, by means of the interposition of an adjustable pulley block.

In the accompanying drawings, Figure 1 is an elevation, partly in section, illustrating diagrammatically a constructional form of the invention; and Fig. 2 is a fragmentary plan illustrating a portion of the apparatus.

The reversing valve consists, as is known, of two bells b, b, which are connected together and balanced by counterpoises 0, which bells according to their position conduct the gas-air mixture alternately from the left or the right into the furnace and simultaneously alternately connect the right or the left side of the furnace with the flue. The reversing is effected in the known manner by first raising the bells b, b by means of a hand lever t and then rotating them through an angle of 90 by means of the spanner f, whereupon they are again lowered. To the bells b, b is connected, as is known, the gas stop valve (Z which is provided in the conduit leading to the reversing valve in such a manner that when raising the reversing bells Z) b it is closed, whereas when rotating the bells it remains closed and on lowering the bells it is again opened. In the known reversing valves, the reversing bells are connected to the valve plate (Z sim- Patented Get. 7, 1913.

Serial No. 746,569.

ply by a rope, a chain, or the like, which is connected directly to the counterpoise lever or to another lever connected to the bells and also directly to the spindle of the valve (Z. According to the present invention, however, an adjustable pulley block is provided between the reversing valve 6 and the gas stop valve (Z. In the constructional form illustrated a rope h is connected to one of the counterpoises or to one of the counterpoise levers a or to another lever connected to the bells, which rope is guided over the free pulley z' and two stationary pulleys 70, Z and tensioned by a weight m. The weight m serves simultaneously as a stop for a regulating spindle a which at its lower end is provided as a fork and can, by this spindle n and by means of the hand wheel 0, be raised and lowered. To the free pulley z' of the adjustable pulley block thus formed is connected a rope g which passes over two stationary pulleys to the spindle s of the valve plate (Z and is secured to the spindle. The stop valve is in this manner so connect-ed to the reversing valve Z), 5 that it must take part in the upward and clownwar-d movements thereof and on the rise of the bells b b it is closed, on the downward movement again opened. By means of the pulley block above described the stroke of the valve plate (Z and thus the gas supply to the furnace can be adjusted. This is effected by the adjustment of the weight m by means of the spindle a and the hand wheel 0.

By depressing the weight m in adjusting the spindle a, the upward movement of valve cl is increased, and vice versa. Due to the interposition of the pulley block aforesaid, the force acting on the valve plate cl when the weight m is lowered will be twice that acting on the lever arm a and will consequently be without effect on the reversing valve b, b. When the regulating spindle a is adjusted upwardly, the valve plate (Z only is lowered correspondingly; and the adjustment of said valve is therefore effected wholly independently of'the reversing valve b, I). In raising the latter valve, the former simply drops to its seat, whereupon the further movement of the pulley block is taken up by the lowering of the weight m. In lowering the said reversing valve, weight m returns until it engages a plate 9 at the end of the spindle a, Whereupon valve plate d is again lifted from its seat the same distance it was lowered, that is to say, the said valve is opened the distance to which it was adjusted. The bells b, b are, therefore, required to be only slightly heavier than the counterpoises plus the weight of the valve plate (Z, that is, they may be practically balanced. It will be noted, moreover, that in making an adjustment, with the lowering of the weight m only the valve plate d, which is lighter than the said bells, will be lifted; and only when the valve plate d encounters a resistance can the adjustment of the spindle n, that is say, the lowering of the weight m effect a move ment of the bells Z), Z). To provide against such contingency, a suitable pivoted catch 11 may be provided to engage the hand lever t, said catch being provided with a releasing foot piece w. The stop valve (Z is arranged to be positively connected to the spindle a through the rope g passing over the pulley block it and in such a manner that the said spindle acts only in a direction for opening the bells. To overcome the eflect of any internal resistance which might occur, for example in the rope or pulley mechanism, to prevent the lowering of the valve plate d, when adjusting the spindle n for the purpose of controlling the stroke, the said adjusting device is arranged to be positively connected to the spindle of the stop valve (Z in a direction to act to close the latter. This is effected in the constructional form illustrated by a forked lever divided in the proportion 1 2, which is fulcrumed at 1". The longer arm 9 of the lever is supported on a plate 10 or the like provided on the regulating spindle a while the short arm 9 is hinged in any suitable manner to the valve spindle s. The arm Q can for example be forked so that it can surround the guide pulley for the rope g on the valve casing e and its support. The lever 9 does not affect the movements of the valve plate d transmitted from the reversing valve 5 Z). If for example in any open position of the valve plate d, the valve .7) .7) is reversed the valve plate is lowered and the lever arm 9 swings upward unhindered.

Claims:

1. In a gas reversing valve, having a gas stop valve controlled threby: means transmitting the movements of the reversing valve to the gas stop valve and including an interposed pulley block, means to adjust said pulley block, and means to positively connect said adjusting means to the gas stop valve for closing the latter.

2. In a gas reversing valve, having a gas stop valve controlled thereby, a rope at one end connected to the gas stop valve, a free pulley connected to the other end of the said rope, a rope guided around the said free pulley, and connected to the reversing bell, a weight loading said rope, a spindle to adjust said weight, and a lever connecting said adjusting spindle to the spindle of the gas stop valve for closing the latter.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

WILHELM REITMEISTER.

Witnesses:

KURT v. STADLER, LOUIS VANDORY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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