1904 



KM'YrHM'KDlA OF PRACTICAL I lOiri'lClM/l'UKK 



shaped types of spray nozzles. When 

 divided into classes according to their 

 construction, several fairly balanced 



3-sil iiv 



Fig. 2:;. (lill Disc nozle. Tlie simple striiiglit- 

 liascd disc nozzle, slmwint; tlie gradual cliaiif^e 

 of direction of flow of tlie liquid and tlie 

 large openings permissible witli tliis t.vpe of 

 no/.zie. (.SS) A variable modified Verraorel 

 nozzle. Tbe bead of the degorger, which is 

 threaded and lits loosely in the threaded bar 

 rel, may lie shifted in position to form a 

 hollow cone spray when above the supply 

 orifice, and a solid stream when below thi.«! 

 opening. Packing under the nut prevents 

 leakage around the degorger stem. (33) A 

 modified Vermorel nozzle in which the whirl 

 Is imparted lo the IPpiid in tbe whirl cham- 

 ber by the spiral an the head of tlie degorgei-. 

 A packing nut prevents leakage around the 

 stem of the degorger. Note the number of 

 changes of direction of flow, the abrupt angles 

 and narrow orifices through which the liquid 

 must pass In becoming a si)ray In all of the 

 Vermorel nozles in comparison with the pass- 

 age-ways of the simple disc nozzle. (?A) A 

 Vermorel nozzle. The outside aiipr-at-anci' 

 gives very little idea of the inner foiiiH-rlirin. 

 Note the shape and pro.iecting [laris wbicb 

 catch over limbs. r.'!.">i A sectional view <if 

 a true Vermorel nozzle. The bead of the 

 nozzle may be set at an angle by turning it 

 around on the threaded stem. Tbe liipiid 

 enters the whirl chamber through a hole at 

 one side of the chamber which gdves it the 

 whirling motiim around the needle of the 

 degorger. Packing imder the nut iirevenls 

 any leakage around the needle stems and the 

 Hprlng holds the needle back leaving tbe way 

 to the hole in the cap tinobstructed. t.'UIt A 

 sectional view of a Self fleaner nozzle show- 

 ing the narrow passageways anil tbe needle 

 which cleans the hole In the cap when the 

 head of the nozzle is pushed Iiack. 



groups are lorined, wliiili ;iiv known as 

 Disc, 22, (31), Vermorel, (32) and (33), 

 Modified Vermorel, (34) and (35), Self 

 Cleaner. (3G), Cap. Bordeaux, Cyclone, 

 and Solid Stream nozzles. This classi- 

 lication follows the trcuil of names with 

 which we are more familiar, and these 

 give some idea regarding construction. 



Different nozzles are suited to liil'ferent 

 worlv, and, as tlieir efficiency sometimes 

 (ieiieuds upon the amount of pressure 

 used, care must he talien not to select a 

 nozzle which will be unsuited to the ma- 

 chine with which it is to he used. Some 

 nozzles are of very large capacity and 

 should not be used with pumps whose 

 capacity per minute is less than that of 

 the nozzle. The Disc nozzles are larger 

 in capacity than most of the Vermorel or 

 Self Cleaner types; more compact, lighter 

 in wei.ght, less liable to clog, and do not 

 have an projecting ])arts to catch over 

 limbs and make trouble. AKhough Disc 

 nozzles have been on the market for only 

 a few years, they are rapidly superceding 

 the older and more common types. 



Most of the Vermorel and Self Cleaner 

 nozzles are of small cap.acity, largely be- 

 catise the small orifices through which the 

 liquid must pass, and the abrupt changes 

 of direction which it must make, reduce 

 its speed and nullify the effects which 

 should be obtained if no hindrance was 

 liresent. The Bordeaux nozzles, strongly 

 advocated by many western orchardists, 

 usually make a flat, fan-shaped spray 

 which is coarse and much heavier in the 

 center of the fan than at the edges. These 

 are also of large capacity and can be 

 adjusted to throw a solid stream of liquid. 



Cap nozzles of small capacity are suit- 

 able for bucket pumps and small hand 

 sprayer.-!. They are often miniature types 

 of Disc nozzles. Those of large capacity 

 tire preferable to the Vermorels. Solid 

 Stream nozzles are best suited for spray- 

 ing tall trees, and, because of their ex- 

 tremely large capacity, cannot be used 

 with any of the smaller power machines. 

 This observation applies es|iecially to the 

 Worthley nozzle, which has been develop- 

 ed for use in spraying for the control 

 of the gypsy and brown-tail moths in 

 Massachusetts. 



