US962846A - Draw-off device for explosive liquids. - Google Patents

Description

L. KESSLER. DRAW OPF DEVICE FOR EXPLOSIVE LIQUIDS. APPLICATION FILED JUNE 14, 1909. 962,846, 7 Patented June 28, 1910.

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L. KESSLER. DRAW-OFF DEVICE FOR EXPLOSIVB LIQUIDS. APPLICATION FILED JUNE 14, 1909.

L. KESSLER.

DRAW-OFF DEVICE FOR EXPLOSIVE LIQUIDS. APPLICATION rum) JUNE 14, 1909.

962,846, Patented June 28, 1910.

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L. KESSLBR. DRAW-OFF DEVICE FOR EXPLOSIVE LIQUIDS.

APPLICATION FILED JUNE 14, 1909.

962,846. Patented June 28, 1910.-

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LOUIS KESSLER, OF CHICAGO, ILLINOIS.

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Specification of Letters Patent.

Application filed June 14, 1909. Serial No. 502,032.

To all whom it may concern: I

Be it known that I, LOUIS KEssLnR, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Draw-Ofl Devices for Explosive Liquids, of which the following is a specification.

My invention relates to improvements in draw-off devices for explosive liquids and more especially to that class of tanks used by retail dealers for the purpose of holding highly explosive and volatile oils, such for instance as gasolene, benzin, naphtha and the like, to enable varying-quantities to be withdrawn from time to timefor supplying customers.

My object is to provide a construction of draw-off device for explosive liquids of the character referred to whereby means shall be afforded for reducing to the minimum the possibility of loss of the oil, either through evaporation or other cause of waste, and as well, to effectually guard against the possibility of explosion of the contents, and provide for the convenient and economical handling of the oil.

In the accompanying drawings which illustrate my improved construct1onFigure 1 is a view in side elevation of a tank equipped with my improvement; Fig. 2 is an enlarged view in sectional elevation taken on the irregular line 2, Fig. 1; Fig. 3 is a still further enlarged view of the lower or valved-end of a suction pipe taken on line 3, Fig. 2; Fig. 4 is an enlarged broken view in vertical section of the pump, measuring andoverflow device taken on line 4, Fig. 2, and Fig. 5 is a broken view in vertical section in the same longitudinal plane as Fig. 4, though at the opposite end of the tank and showing a valved safety and vent-device.

A tank 6, which may be of any desired shape, though preferably of cylindrical form as shown in the drawings, is stably supported on a suitable base 7, and adjacent to one of its ends is provided with a threaded ring 8 attached to the top of the tank in an opening therein. A safety-device 9 having a hollow head 10 is securedto the tank by a threaded engagement of the head with the ring. The head is provided with a circumferential series of openings 11 which are covered by a metal screen 12 (such as wiregauze), and has a downwardly projecting,

. hollow, annular flange 13 from which depends a tube 14 equipped at its lower end with a metal screen 15, preferably of the same material as the screen 12. The head also has extending from it a thimble 16 which, to providefor the insertion of the screen, is made as a separate piece and screwed into the head, and upon the upper end of the thimble is screwed a cap 17 provided with a series of holes 18 and a central aperture 19. A safety-valve 20 provided with a sealing-disk 21, preferably of leather, has a depending hollow stem 22 which passes loosely through the aperture 19 and carries at'its end a flanged tip 23 to confine between it and the cap 17 a spring 24' surrounding the stem, for the purpose of seating the valve upon the cap to normally close the holes 18. Within the stem is formed a valve-seat 25 and a vent, or air-intake, or check valve 26 is normally held against the seat by a spring 27 to close the passage through the stem. As oil is drawn from the tank, in the manner hereinafter explained, the partial vacuum thereby produced opens the intake-valve to Patented June 28, 1910.

permit air to pass into the tank and replace the oil being withdrawn, and as the vacuum is relieved, the spring 27 acts instantly to again sealthe valve. The safety-device thus described forms the subject of my application Serial No. 499,57 7 filed June 1, 1909.

In longitudinal alinement with the ring 8, and secured in lace in like manner, is a similar ring 28 or seating a flanged'ca 29 screwed into it and forming a part 0 an oil-draw-off device; and a gasket 30 is provided as packing between the cap and ring,

to seal the connection. A pump 31 of the preferred ordinary oscillatory type having two similar nipples 32 surmounts the cap and is con-necteditherewith through one of the nipples which is screwed into the .cap, and a suction-pipe 33in alinement with the nipple extends from the cap into close proximity to the bottom of the tank'where it is provided with a gravity-seating valve 34, Fig. 3.

Screwed upon the other nipple is a fitting.

35 provided with a disk 36 having an annular flange 37 and from the center of the disk' rises an oil-inlet pipe 38 surmounted by a glass measuring-dome 39 having a graduated measuringvscale 40, the glass being sealed about its circumferential edge on the disk within the flange 37. By providing the pipe 38 as described, it insures a constant and unvarying column of oil above 'isino the pump and by introducing oil into the dome in this manner, undue agitation is prevented, with the result that the level of the oil is more clearly defined while the pump ration.

The tting 35 is provided with a draw-ofl cock 41 and a hole 42 is formed in the disk 36 so that oil pumped into the dome may be drawn therefrom through the cock to be discharged through a nozzle 43. On the cap 29 is formed a boss 44 into which is screwed one end of a T-coupling 45 which carries at its outer end a can-support 46 centrally disposed relative to the nozzle 43, and from which rises an annular flange 47 forming a cup. A valve-seat 48 is formed in a passage 49 through the body-portion of the support and a valve 50 is normally held against the seat'by a s ring 51. This spring surrounds the stem 0 the valve and is confined between the valve and a cap 52 which is screwed into the body-portion of the can-support. The valve is provided with an upwardly-projecting spider or wingextension 53 to which is attached a perforated concave disk 54 which forms the rest proper for a receptacle (not shown), to be filled from the nozzle 43.

It will be apparent that when a can or other receptacle for holding oil is laced upon the disk 54 to be filled, the va ve 50 wlll be automatically opened either by the weight of the can alone, or as its weight is,

supplemented by that of the inflowing oil. Should the oil from the dome overflow the can, such overflow will run down the can and pass either through the erforations in the disk or over its edge an be conducted back into the tank through a passage 55 leading from thevalved-passa e 49 through the coupling and ca 29 and finally be discharged into the ta through a small pipe 56 depending from the cap 29. The passage from the pipe 56 is completely covered by a metal screen 57 (such as wire gauze), to prevent the possibility of a flame passing through it into the tank to i 'te the contents and explode the can. ading from the fitting 35 is a by-pass pipe 58 connected with the T-coupling 45 and containing a drain-cock 59, so that oil from the dome may be drawn oil through this connection into the tank, for the purpose hereinafter explained.

As shown in Fig. 4, the pump is provided with a face-plate 60 having a stufling-box 61 through which the stem or shaft 62 passes,

' and the latter is equipped at its outer end with an operating-handle 63. In Fig. 2, the pump is represented with the face-plate removed and showin pump-blades 64 extending from the sha and two similar segmental stationary abutments 65, between which the blades oscillate. This type of pump being old in the art and of well known construction and operation, it is unnecesialrys utizitii describe it lhereifn in detail. It will cient to exp ain or resent urposes that,-as shown by dotted liiies in fl ig. 2, a passage 66 leads from the suction-pipe 33 to the lowermost abutment 65 and a pasage 67 leads from the uppermost abutment 65 to the pipe 38. It wi be understood that the passages through the abutments are suitably valved as is the practice in pumps of this type and that the blades contain the usual openings throu h them so that as they are caused to osc' ate between the abutments through the rocking of the shaft, oil will be sucked throu h, the pipe 33 and be discharged throug the pipe 38 into the dome 39.

A tank equi with my invention is used in the f0 owing described manner: With the cocks 41 and 59 closed, oil is pumped from the tank into-the domeuntil the esired quantity has been introduced therein; should the oil, however, be in excess of the amount required, as shown by the scale, such excess may be drawn oil through the drain-cock 59. A receptacle is then placed upon the disk 54 to open the valve 50 and by turning the cock 41 to the o n position, the contents of the dome are ed into the rece tacle through the nozzle 43, and as before escribed, in the event of overflowing of the receptacle, waste of such overflow is prevented, since it is conducted back into the tank. Obviously, the air contained in the dome will be compressed by the inflowing oil, but in practice it has been found that such compression is negligible, since ample space is left in the dome to permit of such compremion, as oil is never intended to rise in the dome to a level above the 38.

Upon each withdrawal of o from the tank, a partial vacuum will thereby be formed therein and as this overcomes the force of the spring 27 the valve 26 will be opened and air rush into the tank to relieve the vacuum, replace the oil withdrawn and prevent the tank from becoming air-bound. Should an undue pressure be generated in the tank as in case of fire, such pressure will be relieved through the safety-valve 20. As the overflow oil or escapin gas is very liable to become ignited, the ame is prevented from entering the tank or back-firing and the resultant explosion of the can guarded against. This is accomplished by covering the openings 11, pipes 14 and 56 with a. metal screen (such as wire-gauze). Upon the evacuation of the tank it may be again filled' through the ring 8 upon first removing the safety-device.

-What I claim as new and desire to secure by Letters Patent is- 1. In combination with a tank of the character described, a draw-ofl device connected therewith and comprising a pump, a

suction-pipe extending into the tank and communicating with the pump, a measuring dome into which the pump discharges and a draw-01f cock leading from the dome, of a can-support extending from said device and containing a passage communicating with the tank, a spring-pressed valve in sald support, and a can-rest carried by the valve, whereby pressure exerted upon the can-rest will open the valve to said passage, for the purpose set forth.

2. In combination with a tank of the character described, a draw-oil device connected therewith and comprising a pump, a suction-pipe extending into the tank and communicating with the pump, a measuring dome into which the pump discharges, provided with a passage leading therefrom, and

' a draw-ofi' cock in said passage,'a by-pass communicating with said passage and with the tank, said by-pass being closed to the atmosphere and a cock in said by-pass, for the purpose set forth. a

communicating with the pump, a measuring dome into WhlCh the pump discharges, provided with a passage leading therefrom, and a draw-off cock in said passage, of a can-support extending from said device and containing a passage communicating with the tank, a by-pass communicating with said first-named passage and with said secondnamed passage, a cock in said by-pass, a. spring-pressed valve in said support, and -a can-rest carried by the valve, whereby pressure exerted upon the can-rest will open the valve to said passage, for the purpose set forth.

LOUIS KESSLER.

In presence of CHAS. E. GAYLoRn, R. A. SCHAEFER.

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