USRE4797E - chapman - Google Patents

Description

RUFUS B. c HAPM'AN.

t in Sealing Dip Pipes of Gas Apparatu s, Reissued Mar ch 12, 1-872.

lmprovemen Iii/Vania? Wain/asses UNITED STATES PATENT OFrIon ASSIGNMENTS, TO JOHNO. CHAPMAN, FREDERICK J. DAVIS, AND JOHN F. FARNUM.

IMPRQVIEMENT [N SEALING DIP-PIPES OF GAS APPARATUS.

Specification forming part of Letters Patent K0 1173602, dated August 1, 1671; reissue No. 4,797, dated March 12, 1872.. I v

To all whom it may concern;- I I Be it known-that l, RUFUS B. CHAPMAN, of

Waltham, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Apparatus for thevManufacture of Coal-Gas, of which the following -is a full, clear, and exact description, reference being had to the accompanying drawing making part of this specification, in which- Figure 1 is an end elevation of the hydraulic main of a gas apparatus with my improvements applied thereto.

on the line a :19 of Fig, 1. I

My invention relates to the combination of a valve and a dip-pipe. in apparatus for the manufacture of coal-gas, whereby, when the valve is open, the gas is permitted to pass freely and without pressure to the hydraulic main, and when suclr free passage is required to be closed by closing the valve, the dangerous con sequences of inadvertently allowing it to remain closed while the production of gas is goin g on are prevented by the gas being allowed to pass under pressure from the retort through the dip-pipe, and the water which seals the outlet of that p'pe, into the hydraulic main in the ordinary manner,

Gas apparatus have been constructed in which dip-pipes have been dispensed with, and the retorts operated withoutpressure-thatis to say,

so that thegas passed off from the retort without pressure, and only so-bythe introduction of a valve at some convenient point between the retort and the hydraulic main. An example of such arrangement is shown in the pat eht of William Gibson, October 5, 1869;;but

such an apparatus I is liable to accident in the I Fig. 2 is a-sectionjthrough the same with the-valve (to be presently described) open. Fig. 3 is a section through the same with the valve closed. Fig. etisascction end of the dip-pipe and pressure to thehydraulic main, and when the valve was closed the gas would pass under pressure through the dip-pipe and sealing wa' ter to the hydraulic main. This arrangement (an example of which is found in the-patent of Edward Jones, J une27, 1871) prevents accident from explosion incident to neglect to open the valve atlthe proper time; but it is objectionable as not beingadapted to gas apparatus already in use, and is liable to become fouled, and the valve has to be removed for cleansing, while my device is more simple, is

cheaply applied to gas apparatus already in use, and the sliding valve removes the tar and sediment from the passages, and automaticah ly the apparatus keeps itself in working order.

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

In the said drawing, Arepresents thehydraulicniain of a gas apparatus, to the top of which is secured a valve, B, to which the bridgepipe leading from the retort is intended to be attached. 0 is a dip-pipe, which extends up into the interior of the valve, and forms a part thereof, .the' lower end of the pipe 0 descending into'the liquimcontents of the main, so as 'toform a dip-seal. D is a sliding plug, which is operated by the lever E, and is provided with an aperture, b, which, when the valve is closed, as seen in Fig. 3, lies over the I opens a commun1oa- 'tion between it and the retort. Within the shell of the valve and around the exterior of I the dip-pipe is formed a series of passages, c,

which open into the hydraulic main, and when the valve is closed these passages are tightly covered by the plug D, as seen in Fig. 3. The charge, may now be drawn from the retort, as the communication between it and the hydraulic main A, through the passages c, is effectually out ofi, and the gas cannot flow back to the retort through the dip-pipe, as its lower end is sealed in the liquid contents of the main. As soon as the retort has been charged the plug D is withdrawn by means of the lever E, "when the gas will flow freely and without pressure through the passages 0 into the hydraulic ratus already in use. It will be apparent also that there may be one or several passages in the shell for the escape of gas with pressure and the escape of gas without pressure without departing from the substance of my invention.

What I claim as my invention, and desire to secure by Letters Patent, is-- v 1. Theshellor'tubeiromwhichthe gas passes into the hydraulic main, divided into a passage or passages for the outlet of the gas without ressurel, and a passage or passages for the outlet of the gas under pressure, in combination with a valve which may close the former outlet-and leave open the latter outlet, substantially as and for the purposes described.

2. The within-described combined valve and main A. Should t e valve, however, be allowed to remain closed through the negligence of. the person in ch. rge during the production of the gas,it will pass under-pressure through the aperture 1) in the plug D to the dippipe (J, and thence into the hydraulic main in the ordin arymanner, thus effectually preventing any possibility of ex lesion or accident.

The above-described combined valve and dip-pipe is of simple construction, can be readily and cheaply applied to gas apparatus al-' ready in use, and can be very easily cleaned,

while by the construction of the valve and its. arrangement in relation to the ,two passages, the tar and sediment are scraped away from the passages c and the mouth of the dip-pipe by the slidingplug when the latter is operated. dip-pipe, the valve being provided with one or The kind of valve which I have here demore passages, a, through which the gas may scribed is that which I prefer and have specipass 'without pressure from the retort to the fied as an element of my second claim but it hydraulic main when the valve is open, and a will be apparent that the construction of the plug, D, having an aperture, 11, which opens a valve and its arrangement in relation to the communication between the retort and the hypassage forthe gas without pressure, and the draulie main through the dippipe 0 when the passage for the gas under pressurethrough the valve is closed, substantially as and for the dip-pipe and sealing water, may difi'er considpurpose described. I I erably from those which Ihave described with- Witness my hand this 30th day of January, out substantially changing their character 'as A. D. 1872. regards the subject-matter of my first claim, which relates to the union'of both these pas- Witnesses: sages in one shell, whereby they can both be N.AUST1N PARKS, readily and cheaply introduced into gas appa- J. HENRY TAYLOR.

Burns B. OHAYMAN.

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