USRE17728E - Signors - Google Patents

Description

July 1930- F. ABURNINGHAM ETAL Re. 17,728

July 15, 1930. F. A. BURNINGHAM ETAL 17,728

SPECIFIC GRAVITY INDICATOR Original Filed June 13, 1925 3 Sheets- Sheet 2 July 15, 1930. F. A. BURNINGHAM ETAL 17,723

SPECIFIC GRAVITY mmcmon Original Filed June 13, 1925 3 Sheets-Sheet, 3

mare 104%? 2 Ji /M47720? of Figure 3.

Reiauecl July 15, 1930 UNITED 'STA res PATENT OFFICE I'OBTER A. BURNINGHAM AND HUGH K. MOORE, OF BERLIN, NEW .HAMPSHIRE, AS-

SIGNORS, BY MESNE ASSIGNMENTS, TO OLD BOSTON, MASSACHUSETTS, A CORPORATION COLONY TRUST COMPANY, TRUSTEE, OF OF MASSACHUSETTS SPECIFIC-GRAVITY IN DICATOB Original No. 1,887,455, dated January 1, 1929, Serial No. 36,823, filed June 13, 1925. Application for reissue filed February 11, 1929. Serial No. 339,253.

In many industries, such, for example, as the manufacture of paper, waste liquors should be as free as possible from valuable chemical constituents.

The present invention has for its object the indicating of certain data to indicate whether ornot such losses are being kept within reasonable limits. Furthermore, the indication may be at a point distant from the waste liquor outlet and preferably in the plant oflice where it sirable check on the work of those whose duties are to keep these losses down.

By indicating the specific gravity of the waste li uor the concentration of the chemical constituents therein is continuously ascer tainable and if the rate of flow of waste is known the amount of the losses is easily computable. V

Primarily, therefore, this invention relates to a device for continuously indicating, preferably at a distance, the specific gravity of the waste liquor and associating with this device means by which the volume of flow of this liquor to waste is ascertainable. Were it not for the flow indication it might be possible for excessivelosses to be concealed by the dilution of waste liquor of excessively that the specific gravity indicator would fail to disclose the true amount of losses.

For a more complete understanding of this invention, reference may be had to the accompanying drawings in which 35 Figure 1 is a somewhat dia rammatic perspective showing an application of the subect matter of this invention. .Figure 2 is'a side elevation of the specific gravity indicator,

eing shown somewhat diagrammatically.

Figure 3 is an'enlarged detail in elevation. Figure 4 is a detail sectionton line 44 Figure 5 is a section on line 5.,5 of Fig ure 2.

Figure 6 isa vertical section modified construction of float.

Referring to Figure 1, 1 indicates a tank or reservoir having an inlet pipe 2 for waste liquor and aweir 3. The level of the pool through a will serve as a de-' the electrical mechanism,

sure chamber 4 inserted somewhat belowthe] level of the liquor and a tube 5 extending therefrom thr ugh which the pressure due to hydrostatic head of the liquor above the lower edge of the chamber 4. is communicated to a transmitting indicator 6 which may be of a type to be more full described and from which through, wires 7 t e indication may be transmitted to an indicator 8 which is pref erably positioned in the plant oflice where it is inaccessible to the workmen having conresents a cone plant mana-' waste llquor.

trol of the rate of flow and tinuous visible indication to t ger of the rate of flow of the prises a tanklO in communication near its lower 'end througha pipe 11 with the tank 1 and having'near its upper end an annuular overflow chamber 12 communicating with the interior of the tank throu h a series of openings 13 and into which t e liquor from the tank overflows when in operation. A pipe 14 leading from this annular overflow chamber conducts the liquor passing through the tank either to waste or it is otherwise disposed of as may be found convenient. The pipe 11 being open permits a steady flow of liquor from the tank 1 through the tank 10 so that the liquor in the tanklO is at all times substantially in the same condition as to its proportion of chemical content as the liquor being run over the weir 3. Within the tank 10 is a hydrometer fioat 15. As shown in Figures 2 and 5, this float comprises a short cylindrical chamber having dome shaped upper and lower ends 16 and 17. This 0 amber e specific gravity indicator to which this I -invention is more particularly directed comis weighted to a suitable extent with shot or other similar material as at 18 and is then hermetically sealed. To its upper end 16 is fixed. a stem 20 which extends between a pair of guide rollers 21 carried by the lower face of a frame piece 22 arching over the upper end of the tank 10. To the upper face 0 this piece 22 is a U shaped strap 23 having a perforation 24 at its'upper end in axial alinement with a similar perforation through the piece 22 and through which the stem 20 projects. Between the side walls of the member 23 the stem 20 is surrounded by a tension coil spring 25 which is fixed at its upper end to a collar 26 pinned or otherwise fastened to the stem 20. The lower end of this spring 25 is fixed to .the piece22.

This spring acts to hold the float 16 submerged beneath the level of the liquor in the tank 10. At the upper end of the member 23 is a laterally extending frame piece 30, the outer end of which may be braced as by means of a bracket piece 31 fixed at its lower end to the outer wall of the overfiow chamber 12. Upstanding from the piece 30 are supporting bars 82 to which may be fixed an electrical transmitting member 35. Also extending from the frame piece 30 and a short piece 36 parallel therewith are upstanding supports 37 between which is pivoted a sector 40 so positioned that the longitudinal axis of the stem 20 passes substantially tangent to its periphery. Above a pair of guide rollers 42 betwee'nwhich the upper end of the stem 20 passes, a flexible metallic ribbon or strap 45 is fixed at its lower end to the upper end of the stem 20 and at its other end to a suitable point on the periphery of the sector 40. This ribbon or strap 4L5 is held under tension by any suitable means such as a counterwei ht 48 connected to the sector 40. With this construction it will be seen that as the float 15 rises and falls, due to changes in the specific gravity of the liquor within which it is immersed, a vertical motion is imparted to the stem 20 and through the strap 45 an oscillatory mo-.

tion is imparted to the sector 40. i

The electrical transmitting device 45 may be of any suitable type, but as herein shown comprises a pair of coils 50 mounted at opposite ends of a rock lever 51 and arranged to move on.or oil of a pair of soft iron cores 52. This rock lever 51 has pivoted thereto a link 54 also pivoted to the sector 40. In order that the extent of rocking motion of the rock lever 51 relative to the rockingof the sector 40 may be adjusted; provision is made for adjusting the distance-from the center of oscillation 56 of the sector-of the attachment to the sector of the link 54. One means for eifecting such an adjustment is shown best in Figures 3 and 4.

Referring to these figures it will be seen that the sector 40 has a readilly arranged slot the face of the sector 40 and clamp the sec- .61 having a head 62 overlapping the face of the sector 40 on one side. This block 61 has a threaded shank portion 63 which extends through and is threadedinto a nut 6 This nut 64; has integral therewith a sleeve 65 which surroundsthe threaded shank 63 and bears at its inner end against a washer 66 engaging the outer end 67 of a cap member which surrounds the smaller end of the block 61 and bears against the opposite face of the sector 40 from the portion 62. By screwing the nut 64 in the proper direction the cap 67 may be pressed firmly against tor between it and the portion 62 in order to hold the block 61 in any position of adjustment lengthwise of the slot 60. The sleeve portion 65 is sufiiciently long to pass through a carrier block 7 O which is permitted to rock 35 which may be fixed in any lengthwise adjusted position within this carrier block by means such as a set screw 72 to adjust the effective length of the link.

The coils 50 are connected as illustrated to the terminals of the secondary 80 of a transformer, the primary 81 of which is connected to the two sides of a suitable alternating current supply service line 82.v Also in series with these coils 50 are coils 85 of a receiving indicator, these coils also being carried by a rock lever 86 and arranged to pass over to a more or less complete extent I the soft ir'on cores 87 It will be noted that'one of the coils 50 which is shown further removed from its core 52 is connected in series with that coil 85 which is further on its core and like wise that the coil 50 which is further on its the coils 50, varying with changes in level of the float 15 due to changes in specific gravity of the liquor to be measured, is caused to efi'ect an indication at a distance on the indicator 90. The indicator 8 may be of the same type as the indicator 90 and receive its control from the sending indicator 6 in "a similar manner. The indicator 6 may be of any type such as is well known in the art and no detail description of any particular mechanism is therefore believed to be'neoessary.

In some cases it may be desirable to compensate for changes in temperature of the'liqnor in obtaining the measurements of the specific ravity. This may be done by using a float %or the. specific gravity mechanism, such as is illustrated in Figure 6. In this figure the substantially cylindrical float 100 is provided with flexible expansible ends 101 which may be formed of plates having annular corrugations therein. This float is weighted as by means of shot 102 and above the shot a volatile liquid such as 103 may be placed therein, this liquid volatilizating more or less according to the temperature to which the float is subjected and acting in response to such volatilization to expand the float more or less, the upper and lower walls 101 yielding in response thereto. Thus the displace ment of the float is increased'on increase of temperature so that the actual weight of liquid displaced by it in the float tank is substantially the same throughout the temperature range for which the mechanism is de- Such a temperature re-- signed to operate. sponsive float may be used ordinarily through a comparatively limited range of temperature changes with a sufiicient degree of accuracy.

Having thus described certain embodiments of this invention, it should be evident to those skilled in the art that various chan es and modifications might be made therein without departing from its spirit or' scope as defined by the appended claims.

We claim:

1. A device of the class described comprising a rockable sector, a hydrometer float, a

flexible member enga cable with the periphery of said sector an operatively connected to said float, an indicating device, and operative connections from said sector to said device including an element adjustable toward and from the center of rocking of said sector.

2. A device of the class described comprising a rockable sector, a hydrometer float, a flexible member enga cable with the periphery of said sector an operatively connected to said float, an indicating device, and operative connections from said sector to said device including an element adjustable in its efiective length and having its attachment to said sector adjustable toward and from the center of rocking thereof.

3. A device of the class described comprising a tank having connections to a supply of liquid, the'specific gravity of which it is desired to measure to establish a level of such liquid therein, a float in said-tank beneath said liquid level, a stem extending upwardly from said float, a guide member above said tank in guiding engagement with said stem. at two spaced points, a spring carried by said guide member and arranged to press said stem and float downwardly, a sector pivoted above said tank with the axis of said stem'substantially tangent to its periphery, a flexible member connecting said stem "to said periphery to be wrapped thereon or unwrapped therefrom as said float rises or lowers, an indicating device, and operative connections from said sector to said device.

liquid therein, a float in said tank beneathsaid liquid level, a stem extending upwardly from said float, a sector pivoted above said tank with the axis of said stem substantially tangent to its periphery, a flexible member connectm said stem to said periphery to be wrap ed t ereon or unwrapped therefrom as sald oat rises or lowers, means for maintaining said flexible member taut, a guide member above said tank in guiding engagement with said stem at two spaced points, a spring carried by said guide member'and arranged to-dpress said stem and float downwardly, an in lcatin device, and operative connections from. sai sector to said device.

In testimony whereof we have aflixed our signatures.

FOSTER A. BURNINGHAM.

HUGH K. MOORE.

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