USRE5771E - Improvement in apparatus for the manufacture of illuminating-gas - Google Patents

Description

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E. JONES.

Apparatus for t'he Manufacture of Lilumnati'ng Gas. NO.5,77\. -Ressued Feb.24,1874.

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Apparatus for the Manufacture uf`lllumnatng Gas.

' Rei'ssued Feb. 24,1874.

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EDVARD JONES, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO JOHN H. BLAKE AND THE AMERICAN OOALGASLIGHT JOSEPH WV. SMITH, TRUSTEES OF IMPROVEMENT COMPANY, OF SAME IMPROVEMENT IN APPARATUS FOR THEYMANUFACTURE 0F ILLUMINATING-GAS.

Specification forming part of Letters Patent No. 116,450, dated June 27, 1871; reissue No. 4,800, dated March 12, 1872; reissue No. 5,771, dated February 24, 1874,' application filed November 28, 1873,

To all whom it may concern:

Be it known that I, EDWARD JoNEs, of Bos ton, in the county of Suffolk and State of Mas sachusetts, have invented certain new and useful Improvements in Apparatus for the Manufacture of Illuminating-Gas and I do hereby declare that the following is a full, clear, and exact description thereof, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings and to the letters of reference marked thereon7 which form a part of this specification.

Figure l is a perspective view of the apparatus complete. Fig. 2 is a rear elevation of the same. Fig. 3 is a transverse vertical section 011 the line :c .o0-of Fig. 2. Fig. 4 is a longitudinal vertical section through the hydraulicmain and pipes immediately connected therewith.

The method commonlyT employed in gasworks of cutting off communication between the retort and the hydraulic main during the drawing of the charge is by means of a dip-pipe descending into, and sealed by, the liquid contents ot' the main. Then these dipqilipes are used, however, the pressure under which the gas is made checks and diminishes its production, and hastens the accumulation of ixedcarbon in the retorts,'whichthus accelerates their destruction. To overcome these objections gas apparatus have been constructed in which dip-pipes are dispensed with, and the retorts operated without pressure by the introduction of a valve at some convenient point between the retort and 'the hydraulic main, the said valve, when closed, eftectually shutting oli` communication, as required when the retort is to be charged, and, when open, allowing the free production andflow of the gas into the hydraulic main. This apparatus, although it produces the most advantageous results, by increasing the production of gas from a given quantity of coal, and retardin g the accumulation of Xed carbon within the retorts, was, nevertheless, liable to the objection that, in case the person in charge neglected to open the valve at the commencement of the generation ofthe gas, the

would cause the luting to be blown out; and, if the valve was still permitted to remain closed, it would endanger the safety of the works.

My invention has for its object to remove these diiculties; and it consists in a gas apparatus having two outlets for conducting the gas from the retort into a main or receiver, one of these outlets being covered with a valve or cut-oft', which, when open, will allow the gas to iiow freely into the upper part of the main without passing through the liquid contents thereof, the other outlet or pipe extending down into the hydraulic main to a sufficient distance to form an ordinary dip-pipe, which is sealed by the liquid contents ofthe hydraulic main by which arrangement, when the valve or cutott'is open, the gas will flow freely and without pressure to the main without passing through the liquid contents thereof; while, if the valve or cut-off is allowed to remain closed, through negligence, during the production of the gas, it will pass through the dip-pipe into the hydraulic main in the ordinary Way, thus effectually guarding against and preventing the slightest possibility of an accident, as the gas can pass at all times from the retort by one or the other of the outlets into the main, whether the valve or cut-off is open or closed.

It is not important where the valve coverin g the outlet from the stand pipe to the hydraulic main is located. In all cases I wish to establish one outlet from the stand pipe covered by the liquid contents of the main, and one direct passage leading from the stand-pipe-or any point between the re tort and the surface ofthe liquid contents ofthe main-to the gasicontaining part of the main.

To enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A represents an ordi= nary retort, from which rises the stand-pipe B, leading to the bridge-pipe O. D and E are two pressure within the retort 2' Y 5mn vided With a valve or cut-off, G, merely communicates with the gas-containing part of the main 1l, Without descending into the liquid contents thereof, While the other outlet, E, ex-

tends down into the main H, forming a dippipe, Which is sealed in the liquid contents of the main, as seen in Fig. 4.

"When it is desired to'draw the charge from thc retort A, the valve G is closed by means of the lever a, or suitable device, which effectually cuts oft' communication between the retort and the hydraulic main H, throughA the opening or pipe D, While the gas cannot flow back to the retort through the outlet E, as its lower end is sealed in the liquid contents of the main. As soon. as the retort has been charged, the valve G is opened, which allows the gas to flow freely, and Without pressure, through the outlet D, into the gas-containing part of the.main H, thereby eiiectually preventing all danger of explosion or accident.

Any suitable valve or cut-oft` may be applied to the outlet D 5 and, instead of leading the pipe or opening D into the hydraulic main, it may be led directly to the point to which it is desired to conduct the gas Without departing1 from the spirit of my invention, the principle of which consists 1n providinga means for conducting the gas from the retort to the desired point at all times, whether the valve G is open or closed.

When the valve G is situated outside the main, it can easily be reached for repairs; and,

in case 1t should become necessary to temporarily remove the outlet D with its valve, in this case suitable caps cau-be applied at the points b o, (shown in Fig. 4,) and the gas allo Wed to pass through the dip-pipe into the hydraulic main in the usual manner, thus avoiding delay and inconvenience.

What I claim as my invention, and desire vto secure by Letters Patent, is-

In apparatus for producing gas from coal, the combination of the hydraulic main H, the dip-pipe E, and valve-pipe Dor outlet, or its equivalent, when open, enabling the gas to be produced in the retort without pressure; the dip-pipe E, or its equivalent, when the outlet D is closed, enabling any gas contained in the retort to escape therefrom Whenever it reaches a pressure higher than that of the dip-seal.

lu testimony that I claim the foregoing I have hereunto set my hand this 25th day of November, 1873.

'EDWARD JONES. XVitnesses:

ALBAN ANDRN,

GEORGE E. PHELPs.

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