US7703A - Improvement sn gas-meters - Google Patents

Description

UNITED STATES THOMAS W. LANE, VVOBURN, MASSACHUSETTS.

IMPROVEMENT iN GAS-METERS.

Specification fmming part of Letters Patent No. 7.703, lated October 8, 1850.

To all whom it may concern:

Be it known that I, THOMAS WILSON LANE, o f Woburn, in thecounty of Middlesex'and State of Massachusetts, have invented a new or Improved Gas-Meter; and I do hereby de clare that the following is a description of the same.

That my improvements may be fully under'- stood, I will describe the meters now in co'mmon use, speak of their defects, and then de scribe my inveutionor improvement for remedying those defects.

The drawings l 2 8 4 5 6 7 8 9- give a clear and distinct view of my improved meter, as Well as the meters in use in this countryand in Europe, with this exception, that the reservoir Z, as shown in Figures 7 and 8, is not in general use, the same having been-patented by Henry Robinson, of Boston, March 10, 1831,',

and being in use at the Boston Gas-LiglitGompanys works.

Of the said drawings, Fig. 1 denotes a front'elevation of my improved meter. Fig..

2 is a rear elevation of it. Fig. 3is atop view of it. Fig. 4 is a transverse vertical and central section ofit. Fig. 5 isa longitudinal section of the rear chamber ofthe meter, the same being taken through the middle of the lioat therein.. Fig. v6 is a longitudinal and vertical section of the reservoir and external case of the meter and made to represent the improvements in the reservoir or its connection with the main chamber of the meter. Fig. 7 is a representation or elevation of one of the old meters, the front side of its rear or float chamber being removed for the purpose of exhibiting the parts within the said chamber. Fig. 8 is a perspective elevation of the said old meter. Fig. 9 is a vertical, central, and transL verse section of it, the internal construction of the drum-Wheel not being exhibited, las the same kind of drum-wheel is used both in the old and newor improved meters, and is well understood by persons skilled in the art to which such instruments appertain.

Now I change the condition and arrangement of the meter by placing the clock-work and dials on the opposite end of the meter' from that shown in Fig. 7, where motion isV communicated from the revolving drum B, Fig. 9, to the clock-work by means of an endless screw, N, (on the end of the'shaftnpon which the drum rotates,) playing into an upgear into a toothed wheel, b', which is on a secondary'shal't, c', this shaft passing through a stuiingbox, d', which passes through what was the back head of the meter-case, and on the outer end of thisisa pinion, e', which gears into the primary wheelf of the clockwork,

(dotted lines in Fig. 4 representing many of such parts,)and thus communicates motion to the clock-work, as seen at f, and keeps registry ofthe number of revolutions ofthe drum B, and by these means determining the quantity of gas which has passed through the meter.` rlhis aetionis lunch more simple and durable than that generally used,and has this important advantage, that in no case, however great may be the pressure, can there be an overiiow of water, which destroys the 'gearing of the clock-work; nor can there be any escape' of gas up into the box which contains the same. Thus one of the important defects in the old meter is avoided and it is` made much less liable to derangement. I do not claim the whole of this arrangement as new, but only the use of the secondary shaft, which, being much smaller in diameter than the main shaft and moving one-third or one-fourth as fast, there is less friction and consequently less wear in the stuffing-box. Should in the course of years this packing be destroyed, by removing th'e casing which covers the clock-move ment the shaft can be repacked, the casingre placed, and the meter put in perfect order in lessthan one hour. 4

Secondly, it is known toallwho use gas that occasionally, and particularly when all the burners are brought into use,the light will commence flickering and then suddenly go out,

leaving the house in entire darkness. This is' occasioned by the falling of the water in the chamber C, in which is the valve-float G. (See Fig. 7.) The gas entering the inlet-pipeE, into the chamber F, in which is thevalve 7i', and passing through the valve-seat, and first acting upon thewater in this chamber, causes itfto descend, carrying with it the valve-float. Now if the water i's in any degree below its true level, and the gas is let on with full pressure, the valve h will close at once and cut o ffthev gas. To obviate this, a much-larger range is ter is low enough tosubject the gas company` to a. loss of from teu to fifteen lper cent. To obviate this evil and make a meter which shall be'aju'st measure between buyerand seller,and not be subject to the annoyances before mentioned, I have invented and brought into use the arrangement which I claim as new.

By removing from the'chamber (in which is the inlet-pipe, valve-float, and dry well) the toothed wheel and upright shaft I am enabled to'exteud the horizont-al chamber in which is the valve to any length I may choose. This I have done, .as shown in, the drawings, and I now place the valve H (see Fig. 5)-above the vertical part or chamber F, which extends below the water-line and is open at the bottom. From the side of this chamber lis an opening and pipe, E, communicating with the dry Well l) and soldered tight to the saine. From this dry well the bent tube-f' (see Fig. 4) conducts thevgas into the interior of the drum B. The gas entering the meter through the inl'etfpipe L passes through the horizontal chamber G, down through the vertical chamber F, into the dry-well tube E, thence through thebent tube j", and its pressure is first felt in the vertical chamber -F and the interior of thev drum, slightly depressing the water wthin'them and causing it to rise in the chamber C, in which is the valve-float K. -By this arrangement consumers of gas are certain that if theylcan light`their-gas at all they may be sure of a full supply forthat time of burnin-g.

' When the gasfis shut off by means of the small hole h in the head of the metercase A, the pressure is-cqu'alized, and the water be comes'level in both chambers, and it' the `water has become-still loweriu the meter in con-v sequence of use the next night no gas can be obtained, and notice will be given at the cour panys oficeat once, and a supply of water may be put'into the reservoir N, [irstshutting the stop-cock and taking out the screw c in the lower part of the frontof the meter, fill the reservoir, put in the screws, open the stop, and the meter isready for use.

My nextfimprovement is in the reservoir Z,

Figs. 7 and 8. Frein long experience i-t has been found that the reservoir would not, uu-

der all circumstancesngive up its supply of water when wanted, it was slow and uncertain in its action, and required much nicety in its adjustment, the gas having at all times to overcome the hydrostatic pressure of the water before it could pass up and permit the wa 'ter to flow out, and if it happened to be filled entirely full, so as to have no vair above lthe water, it could not be madeto act at all. To overcome these diliculties, I now perforate a small aperture in the meter-case at'ithe true water-devel. Into this aperture I solder a ltube, k, (see Fig. 6,) the bore of which is about one-fourth of an inch diameter. This tube passes into the reservoir Nand rises within onefourth of an inch of the top. When Vthe water is put into the reservoir, it can rise no higher than the top of this tube. It will now be selfevident that when the water in the bodyof themeter falls below the lopening of this tube the gas will at once pass up and pressing our the surface of the water causes it to descendv through the stop cock i until the water rises in the body of the meter and seals the mouth of the'tube,vwhen `itwill` remain at rest until the water again falls, and this will be repeated without fail, and the water in the body of the meter will never vary more than one-eighth Aof, an inch until the waterv is exhausted, thus producing an accuracy of measurement which has not heretofore been obtained I also :lt-

tacha filling-tube, P, tothe reservoir, which is closed by a screw, m. This tube passes nearly to the bottom ofthereservoir, and at all times` seals the same and prevents the en trance of air or escape of gas'.

l1. The introduction of the secondary shaft connecting vby means of a wheel` and pinion4 with the drum-shaft `in the interior of themeter-case.

2. The arrangemenhsubstau tiall y as shown, by which the gas is passed at once into the interior of the drum, and removing the pressure from the chamber in which is thevalvefloat, or by whatever means this -elect is produced.

T. W.v LANE. Witnesses: Y

GALEB EDDY, F. GOULD.

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