Vol. 16—1962 - NorthEastern Weed Science Society

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figure 1,. Aachematic ,dr$w1Qsof the 1Q8N'~tbn1c COllOeD:-:,
tration ,spra.ver when in position for spr8.y1ng.
78
of using only small amounts of ch8lll:lciU~
With the above in mind a log-llpJ'&.Yer-.s :aes1gaid using the Ries and Terry
sprayer as the basic component.
Design Features
Tbeautbcir$j us !trig, the bas1c'Mes andTe~1BiIIIlJJ1. ~~ti!lprayer (5)/,.'hi.ve
adapted the unit 80 tbSt'a logar1thild.o dosage curve *~ Obtained. Tlie _~,.
, ifiedsprayer c'OD8ista·~nent1.a.U:y' dr ,two DaSieim1t. of! 1ll.fterent size :C6'ilbeCt­
,ed in series • The :un1t closest W~~hEi co~t$O~ 1S·.:" que.rt glassroUlld'"
milk 'b()t'Ue: Bt'ld,Sft'V'eSd~S tlledllueRt tank or 8Our~ ."'Jti, un:l..t .nearest.·'fIbe '"
bOOlll i8 a s1lllUar~1;bottle e.ndlsietVes as the,(:on~e chamber. 'l'be'''I'
pressure'soU1'Ce 'is l a COoacylinder rt'bh a, pre-set, predUH-regulating vaJ.v.~ ~'
(Fig. 1.,). ' : ',', 'If;;' ,;., , : k,
c ;'_'-'.; •..1.:\':;'
In moetlOglOSprayerselabor8te .. chanical 88itaUOn :1;8 proVided, ~;
none is incll1dedln the:present iDo4ltJ.. The mixing otJthe 861utions in the ",'
concentrate tanlt is accomplished, bytbe h;ydraul1c :force Of the diluent etttWlng
the pint bottJ.e. The inlet 1s adjacent to the outlet and this plus the faot.; ,
that there is only a relatively small volume (1 pint) in the chamber makes
6deqU&te m1xingposslble."
'"
" , The factors affecting any spray apparatus such as pressure, nozzle 81&tJ.,
speed, etc. govern the range of output of this spra.yer. Since the sprayer must
be carried by band,'walld.ilg' speed ~8an 1IlIpCrte.a\l,faCtor. Ex,per1enee.'bas
shown that walking speeds for d1etbClit8 up to 40 feetI:can be controlled qu1t":~: '
accurately without the use of any special pace setting devices. For this re&8on
it is best to keep plot sizes Within this limit unlese:llpl!!cial means ate uaedto
set a constant pace for the operator. To overcome some of the problems involved
with :walking speed, a float valv.;cons1atlng of .. roODdf'lflOOdenball has been put
in the diluent chamber. When all the liquid in this chamber is expended the
ball Sellls, off the 'outlet and' 1nataat'1,y cuts Ofttl1e~s.ure supply. ..SilLtie the
two containers are connected in series, stopping the flow of diluent 8't~, &11 '
flow from the nozzles and the dilution of the material in the concentrate tank
stops. This markS the end of the plOt, which isthell .. sONd and dosage .. ,
calculated.