US2316537A

US2316537A - Overfall sampling device

Info

Publication number: US2316537A
Application number: US415261A
Authority: US
Inventors: Bertram H Hendrickson
Original assignee: CLAUDE R WICKARD
Current assignee: CLAUDE R WICKARD
Priority date: 1941-10-16
Filing date: 1941-10-16
Publication date: 1943-04-13
Anticipated expiration: 1960-04-13

Description

April 13, 1943;

B. H. HENDRICKSON OVERFALL SAMPLING DEVICE 5 Sheets-Sh eet 1 Filed Oct. 16, 1941 "wag B.H.HENDRICKSON ATTORNEYS April '13, 1943'.

B. H. HENDRICKSON OVERFALL SAMPLING DEVICE Filed Oct. 16. 1941 I 5 Sheets-Sheet 2 INVENTBQ B.H.HENDRICKSON ATTORNEYS nim) I a-z-l April 13, 1943.

5.1-1. HENDRICKSON I 2,316,537 OVERFALL SAMPLING DEVICE I 5 She ets-Sheet :5

Filed Oct. 16, 1941 INVENTQR B H HENDRICKSON ATTORNEYS April 13, 1943- B; H. HENDRIICKSON 2,316,537

OVERFALL SAMPLING DEVICE FiledOct. 16, 194; 5 Shee ts-Sheefl 4 E l l I E l l INVENTOR B.H.HENDR|CKSQN ATTORNEYS A ril 13, '1943.

B. H. HENDRiQKSON' OVERFALL SAMPLING DEVICE 5 Sheets-Sheet 5 Filed Oct. 16, 1941 INVENTORC" B;H.HENDRYICKSON ATTORN EYS Patented Apr. 13, 1943 UNITED STATES PATENT OFFICE 1 QVERFALL SAMPLING DEVICE Bertram H. Hendrickson, Athens, .Ga., assignor to Claude R. Wickard, as Secretary of Agriculture of the United States of America and to his successors in oflice (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 O. G. 757) Claims.

This application is made under the act of March 3, 1883, as amended by the act of April 30,

1928, and the invention herein described, if patented, may be manufactured and used by or for the Goverrm'ient cf the United States of America for governmental purposes without the payment to me of any royalty thereon.

This invention relates to a device which is adapted to be placed in a fluid overfall, the'general object of which is to collect a substantially constant fraction of the fluid, which may be Water that contains soil, for the purpose of obtaining a sample of the fluid to be submitted to analysis. v

A specific object of this invention is the provision of such a device which is automatic in operation and which willcollect a substantially constant fraction of the overfall overwlde ranges of discharge fluctuations thereof.

. In the accompanying drawings, there is illus- I trated an embodiment of my invention, in which:

the embodiment illustrated comprises a suitable frame structure II in which there is mounted a waterwheel or turbine l21' ixed to an axle l3, said axle being rotatable in bearings l4 and l5 on frame members l6 and I1. Above the waterwheel I 2 ismounted a trough l8 which guides the overfall to a point over the waterwheel so as to impingepupon its blades and rotate it, thereby rotating the axle l3. Splash walls I9 and are mounted between the sides of the frame structure and the waterwheel I2.

Between'the waterwheel I2 andthe trough l8,

which a belt 25, preferably of the V type, travels. Around the belt 25 there are spaced a number of projections 26, such aspieces of wire, which travel through. the slot 22 and scavenge it of any deposits which might prevent the passage of fluid through the slot into the housing 2|.

Through the bottom of the housing 2i, near the forward end, an outlet 21 is provided, which outlet is connected to a tube 28, such as a common rubber hose, to carry off fluids which collect in thehousingZl. V I

The pulley 241s fixed to a horizontal shaft 29 which projects through bearings 30 and 3 l in the side walls of the housing 2|, in which bearings said shaft is rotatably mounted and extends on both sides therefrom where the ends of said shaft are rotatably ,mounted in bearings, 32 and 33 attached to thelower end of vertical supporting members and 35. The upper ends of the sup.- porting

members

34 and 35 are connected to a horizontal bar 36, to which there is attached" grooved ro1 1er s,,3'l and 38 which ride on a horizontal tracker runner 39secured to brackets Ail and ll depending from the frame of the device. Therollers 31 andf38 are held on the track 39 by means of atrunnion roller 42 which abuts the underside of ,a horizontal runway 43 secured to the track 39'. This roller 42 is mounted on a bracket 44 which, is attached to the horizontal bar 36.

. The belt 2 5,is driven by power, appliedto the pulley 23 from ahoriz ontal shaft 45. The shaft 4.5is .of a. square cross-section or of some other suitable non-circular shape, and engages a com- .plementaryaperturejfi through the pulley 23.

The pulley23, however, is not fixed tov the shaft 45, but is axially slidable thereon. The shaft 45 is rotatably, mounted in

bearings

41 and 28, at

which points it may be of a circular cross-section, on frame members 49 and50, which are disposed in a direction parallel to the slope of the housing 2|; Acrossthe frame members 49 and 50 there is disposed a fiat bearing surface, such as a plate 5|, upon which a roller 52 travels laterally, which rollersupports the rearward end of an extension 53 of the housing'2l. The rearward end of the extension 53 is also swiveledto the mounting 55 of a pulley.55 by. means of a bolt 56, which pulley engages' a horizontal track 57 secured across back frame members 58 and 59. The pulley 55 is maintained in contact with the track 51 by means of .a spring. 60,,one end of which abuts the end of the extension 53. and the other end of which abuts themounting 54.

The shaft 45 extends through the bearing 41 to receive a pulley 6|, which is belt-connected to another pulley 62 fixed to the axle l3, substantially as shown. In this manner rotation of the waterwheel 12 causes the shaft 45 to rotate.

The housing 2! is urged to one side of the waterwheel l2 by means of

weights

63 and 64 attached to one end of

cables

65 and 66 the other end being attached to the extension member 53 and the bar 36, respectively, said cables operating over pulleys or sheaves '61. and 68 on the frame of the device.

On the side of the device opposite the weights B3 and 64, means are provided for moving the housing 2| across the width of the overfall against the action of said weights. These means comprises a pulley 69 fixed to the shaft 45 which is belt-connected to a pulley of. the axle l3. There is also mounted on the shaft 45 acam H, preferably of a hyperbolic curvature, which is. fixed to the pulley" 69, by means of bolts 12 soas to rotatetherewith. lThecam "H. operates against a roller l3v fixed to the end ofa lever M, the other end. being pivoted. at l5 torthelframe of the device. .Below the lever 14 another lever 16 is pivoted. at one end to the frame beneath the pivot and. is connected to thelever-"M by.

an arm TL which is pin-connectedat 18 to the lever 14 and at 19 to the lever 15.. Theother end of the lever 16 extends forwardly towhich there is attached the ends of cables'8illand8l. Said cables pass over pulleys 82. andv Bland. are attached to the bar and extension 54,. respectively.

In operation the overfall is directed through the trough I8 from whence itimpinges upon the blades of the 'Waterwheel l2 causing it to rotate. This. also causes. the shaftto rotate, which. is belt geared to the axle l3. Rotation of. the shaft 45 causes the pulley 23 to rotate whichcdrives thebelt 25 to. which. theprojections- 23-a1 e attached. 'Rotation of the shaft 45..also causes the cam TI. to rotate, Whichoscillatesthe roller 13. This. oscillation is transmittedsto the .lever. 16. The weights E3-and64 urge thehousing 2| to the left, as viewed in Figure 3; 7 'When the. cam H operates to force the roller 13 downward,.the cables 8ll and 8| pull the housingZ I. in the opposite direction against the action of the weights 63 and- 64 until the roller .l'3.is in. itsextreme As the housing 21 movesfirst tothe right and r then to the left across the width of .theovetfall, it receives a small fraction of'fluid from .the overflow through the slot 22 which .is constantly being scavenged .or cleaned by v.the projections 28' so that. a. true sample of the overfallisobtained at all times. In moving. from one side to the other the pulley 23 slides axiallyover-the shaft 45 while the rollers'31 and. 38 travel over the track 39. Atthe same time .the trunnion roller 52 rides on the plate-filland the pulley 55 rides againstthe track 51..

Variations in-the disohargeof the overfall varies the speed of the waterwheel: l2 whichin turn varies the scanning speed. .of the housing 2|. In. this manner the device collects substan tially the same percentage or. fraction of the overfall at different discharges, assumingithatithe head of the overfall remainsconstant.

1. A device for obtaining a sample of a fluid overfall comprising a waterwheel actuatable by the overfall, a housing having a slot opening therethrough narrower than the width of the overfall intersecting the trajectory of the overfall, said housing being movable from one side of the overfall to the other, means urging said housing to one side of said overfall, and means actuated by said waterwheel for intermittently Having thus described'my invention, I claim:

.movingsaid housing to the other side of the overfall against the action of said first-mentioned means.

2. A device for obtaining a sample of a fluid overfall comprising a waterwheel actuatable by the overfall, a housing having a slot opening therethrough narrower than the width of the overfall intersecting the trajectory of the overfall, said housing being movable from one side of the-overfall to the other, means urging said housing to one side of said overfall,.means actuatedby said Waterwheel for. intermittently moving said housing tothe other. side ofthe overfall against the action ofsaid firstementioned means. and means for continuously recovering the fluids which collect in said housing.

3. A device for obtaining a sample of a'fluid overfall. comprising. a waterwheel. actuatable. by

the overfall, a .housinghaving a slot opening therethrough narrower than the Width of the overfall intersecting the trajectory of the'overfall,

.said housing being movable fromone sideof the overfall to the other, .meansurgingv said housing to one side of said overfall, means actuated by said waterwheel. for intermittently moving said housing. to the other side of the overfall against the action of said first-mentioned meanaand means actuated bysaid waterwheelffor continuously scavenging said slot.

4. A. device forobtaining. asample of fluid overfall comprisinga waterwheel actuatable by the overfall, ahousing having .ajslotopening therethrough narrower than the width of the overfall intersecting. thetrajectoryrof the overfall, said housing .being movable from. one side of the overfall to the other,.means urging said housing to one side of .said. overfall, means actuated by said waterwheel. for' intermittently moving saidhousing tothe other. side of ltheoverfall against the action of said first-mentioned means, means for continuously recovering the fluids which collect in said housing, and ,means actuated bysaid waterwheel f0r.coritinu0l1sly scavenging saidslot.

.5.'A device for obtaining asample otafiuid overfall comprising awaterwheel actuatable by the overfall, a housing having a slot opening hear" the ends of the slot, a belt frictionally engaging said pulleys, pins secured to said belt in spaced relation vthereabout, said pins extending outwardly from said belt to project through said slot and scavenge it, and means for applying power from said waterwheel to rotateone of said pulleys.

BERTRAM H. HENDRICKSON.