April 3, 1909 



HORTI CULTU RE. 



519 



The Castle Automatic Circulator 



The Summit of Perfection. No Device has ever been Invented for Forced Hot Water Cir- 

 culation which will do what this little machine accomplishes, for Economy in First Cost or in 

 Operation. Requires no Supervision or Manual Manipulation. Prices and Discounts on 

 Automatic Circulator, several sizes, with or without Motors, also Testimonials from Large 

 Greenhouse Establishments, east or west, furnished on Application. 



While the method of pro- 

 ducing a forced circulation 

 of liquids is the same as in 

 the Original Electric Circu- 

 lator, some modifica t i o n s 

 in construction which we 

 consider to be of vital im- 

 portance are made. 



A is a light brass v.ilvc. biui;e<l as slinwii 

 «t K, on the outer eiirt of valfe shaft fitted 

 n-ith Index pointer H, protrudinfr through 

 valve casing as shown in lialt lone. This 

 Index shows at a glanie the position of 

 the valve in the pipe. When the propeller 

 O is running the liquid is drawn in at the 

 arrow 1, follows the courses 

 shown by 2, 3, 4 and 5; as 

 it impinges on valve A. the 

 valve being very light, is 

 thrown up as shown, closing 

 the gravity system and 

 passes on into system as 

 shown by 6. Tlie instant 

 the propeller ceases to act 

 the valve A drops and 

 opens up an unobstructed 

 gravity flow from I, 7 and 

 <i to the system. It has 

 been demonstrated that for 

 ordinary and usual duty 

 there is no advantage to be 

 gained by use of three way 

 valve wiiich must be oper- 

 ated manually. Another 

 valuable feature of this 

 style of Circulator is it can 

 be readily installed b\ in^ 

 one who has the ni bun il 

 ability to cut out i 1 n-tli 

 of return pipe siitli i in t 

 take in the top 1 m w iii- 

 on the flrlngcs I I iwhi h 

 are furnished) nnl bolting ' 

 the pipe and Circulitni 

 tla/iges together 1 ht plo 

 peller chamber R is ntteil 

 to top I rigidly, consecinent 

 ly the propeller shaft E 

 cannot be sprung or cramped 

 ings T, K. L, and is always in line wnn 

 top I and return pipe. The pulley S is at- 

 tached on projecting end of shaft E and sup- 

 ported by bearing F, held in place by saddle 

 D. The bearings F. K. I. are bored out in 



The great improvement 

 of its being equipped with a 

 valve which requires no 

 manual manipulation to 

 change from forced to grav- 

 ity circulation will be at 

 once recognized as extreme- 

 ly valuable. 



absolute truth, the liackward thrust of pro- 

 peller being taken up by step M and cap N. 

 The shaft propeller and bearings are made 

 of best Tobiu brou/ie. bearings K ami I, have 

 water lubrication, V is fitted with oil cup. 



The motor ni.iy be placed wherever de 

 sired and connected by round or tlat licit 



passing of 

 •o the api 



sometimes 



:;roater 



ittMcliments 



Patent Applied Fo 



its b( 



pulley 



S. It will lie reco:_ 

 desirable feature, as the motor 

 may be located awa.v from the dust, ashes 

 and heat of the heating apparatus, also 

 obviating any necessity of insulating it to 

 prevent, in using an electric motor, the 



It of the electric current 

 which we have found 

 it the motor is not kept 

 ing [Kiwer and givhig a 

 or less intensity to any 

 itact with the Circulator 

 'i'he motor may be oper- 

 ated by an electric switch 

 placed ' in any convenient 

 place, and at a distance 

 from the boiler or fire 

 i-ooni, as the instant 

 the propeller starts into 

 action the automatic valve 

 is thrown up and the 

 water passes into the 

 boiler and system, when 

 the electric current is 

 switched oft the propeller 

 stopping the valve drops and 

 the gravity system becomes 

 operative. In cases where 

 the electric current is not 

 oibtainal)le. or too expen- 

 sive, gasolene engine or 

 water motors nia.v be used. 

 It is not necessary to run 

 Circulator contii-nously. As 

 soon as the thermometer 

 on the return shows ap- 

 jiroximately (within ten to 

 tifteen degrees) the tem- 

 lieratnre of the flow from 

 the boiler, it can be shut 

 down, the automatic valve 

 opens to full capacity, and 

 the pipes and water there- 

 in, being all heated to with- 

 AUTOJ^ATic CIRCUI-ATDR in a few degrees of each 

 other, the gravity operation 

 is so accelerated that the system will keep 

 up its heat for from one to three hours. 



The Circulators are built in three sizes, 

 Xos. 2, 3 and 4, with tops on connections 

 to returns coniplote no to eight inches in 



• W.W. Castle 



BOSTON MASS . 



■il that this 



diameter. 



A Special Bargain. 



I have on hand, complete, ready for delivery, three new No* 

 4 and one No. 3, of the original Electric Circulator 

 which will be sold at less than one-half price F. O. B. Boston. This is a genuine bargain. W e 

 should not make this offer were it not that our stock-rooms must be cleared to make room for 

 the Automatic Type which we are now making exclusively. Don't delay if you want them. 



W. W. CASTLE COMPANY, 



170 Summer Street, Boston. 



