42o 



HORTICULTURE 



September 26, 1908 



THE CASTLE 



The Automatic Circulator. 



While the method of pro- 

 ducing a iorced circulation 

 of liquids is the same as in 

 the Electric Circulator, some 

 modifications in construc- 

 tion which we consider to 

 be of vital importance are 

 made. 



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. 



A is a light brass valve, hinged as shown 

 at K, on the outer end of valve shaft fitted 

 With Index pointer H, protruding through 

 valve easing as shown in half tone. This 

 Index shows at a glauce the position of 

 the valve in the pipe. When the propeller 

 C is running the liquid Is drawn in at the 

 arrow 1, follows the courses 

 shown by 2, 3, 4 and r,; as 

 It Impinges on valve A, Ihe 

 valve being very light, is 

 thrown up as shown, closing 

 the gravity system and 

 passes on into system 

 as shown by 6. The 

 instant the propeller ceases 

 to act the valve A drops and 

 opens up an unobstructed 

 gravity How from 1, 7 and 

 6 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 which must be oper- 

 ated manually. Another 

 valuable feature of this 

 style of Circulator is it can 

 be readily installed by any 

 one who has the mechanical 

 ability to cut out a length 

 of return pipe sufficient to 

 take in the top 1, screwing 

 on the flanges J. J., (which : " 3 

 are furnished) and bolting 

 the pipe and Circulator 

 flanges together. The pro 

 peller chamber, B, Is fitted 

 to top I rigidly, consequent- 

 ly the propeller shaft E 

 cannot be sprung or cramped In Its bear- 

 ings T, K, L, and Is always in line with 

 top I and return pipe The pulley S Is at- 

 tached on protecting end of shaft E and sup- 

 ported by bearing F. held in place by saddle 

 D. The bearings F, K, L are bored out in 



Referring to Diagram Below. 



absolute truth, the backward thrust of pro- 

 peller being taken up by step M and cap N'. 

 The shaft propeller and bearings are made 

 of best Tobin bronze, bearings K and L have 

 water lubrication. F is fitted with oil cup. 



The motor may be placed wherever de- 

 sired and connected by round or flat belt 



passing of any part of the electric current 

 to tne apparatus, which we have found 

 some times occurs if the motor is not kept 

 clean, thereby losing power and giving a 

 shock of greater or less intensity to any 

 one coming in contact with the Circulator 

 or attachments. The motor may be operat- 

 ed by an electric switch 

 placed in any convenient 

 place, and at a distance 

 from the boiler or fire 

 room, 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 off the propeller 

 stopping the valve drops and 

 the gravity system becomes 

 operative. In cases where 

 the electric current is not 

 obtainable, or too ex- 

 pensive, gasolene engine or 

 water motors may be used. 

 It is not necessary to run 

 Circulator continuously. As 

 soon as the thermometer 

 on the return shows ap- 

 proximately (within ten to 

 fifteen degrees) the tem- 

 perature of the flow from 

 the boiler, it can be shut 

 down, the automatic valve 

 opens to full capacity, and 

 the pipes and water there- 



Patent Applied For. 



W. W. Castle 



BDSTDN MASS . 



/automatic circlu-ATOT? jd, being all heated to with 



to pulley S. It will be recognized that this 

 is a very desirable feature, as the motor 

 may be located away frcm the dust, ashes 

 and heat of the heating apparatus, also 

 obviating any necessity of insulating it to 

 prevent, in using an electric motor, the 



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, 

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

 to returns complete up to eight Inches In 

 diameter. 



Couplings are Furnished with Bolts and Nuts; Asbestos Packing also if desired. Sample Coupling] 



THe Castle Compan 



170 SUMMER STRB 



