44 



Ninety Degrees" says the Regulator 



And that will be the unchang- 

 ing temperature of your bath 



XT the top of the contrivance here 

 A\ illustrated, a little lever sUdes over 

 a small, circular and graduated 

 scale. Set this 

 lever at any 

 point you like — 

 the scale reads in 

 degrees Fahren- 

 heit — open a valve 

 and forthwith your 

 bath water comes 

 out at the right 

 temperature. Once 

 having set this 

 lever, you may let 

 the water run an 

 hour or more; in 

 fact, any length of 

 time, and still the 

 temperature re- 

 mains unchanged 

 — this in spite of 

 the fluctuation in 



the supplies of hot and cold water fed to 

 the contrivance. And hot and cold sup- 

 plies do fluctuate, as anyone who has 

 ever stood under a shower bath knows. 

 Alternate freezings and scaldings are not 

 pleasant. 



The illustra- 

 tion shows the 

 principal work- 

 ing parts and 

 their functions. 

 The big cyhndri- 

 cal coils of the 

 machine are 

 made of two un- 

 like metals weld- 

 ed or riveted to- 

 gether to form a 

 thermostat. The 

 metals expand 

 or contract with 

 changes in tem- 

 perature very 

 much as does 

 the hairspring 

 on a watch at 

 each tick. The 

 regulating lever 

 at the top con- 



Even the baby enjoys a bath in which the 

 temperature of the water does not change. 

 Look at the happy expression on his face 



BEGTJLATIN'G LHT^TR 

 CONTROLS TF-MPERATUHB 

 OF ■WATER 



TEMPERATimZ SCALE 



SWINGING YOKE 

 GEAR OPERATED 

 BY MOVEMENTS 

 OF COILS 



Pn'OT ON WHICH 

 BALANCED VALVE 

 SWINGS 



HOT WATER INLET 



The principal parts of the water regulator and their 

 functions. There are six metal thermostat coils 



279 



trols the amount of this expansion or 

 contraction just as does the "fast" and 

 "slow" lever on a 

 time-piece. Thus 

 the temperature of 

 the water is con- 

 trolled. The mo- 

 tion of the spirals 

 with changes in 

 temperature are 

 passed along to the 

 balanced valve at 

 the bottom of the 

 machine by means 

 of a yoke hidden 

 in the interior. As 

 a result of the 

 thermostat's ac- 

 tion, the balanced 

 valve can open the 

 hot and cold water 

 supplies only to 

 the right degree 

 and proportion necessary to produce the 

 temperature desired. 



The machine is of great use in hospitals 

 where many baths of widely varjdng tem- 

 perature must be given to patients. 



Laundries also 

 find the con- 

 trivance of 

 value in control- 

 ling the hotness 

 of water used on 

 fine fabrics. 



Several sizes 

 are manufac- 

 tured, from a 

 small one suited 

 to the home, to 

 others of large 

 capacity adap- 

 ted to the needs 

 o f sanitariums, 

 hotels, Y.M.C. 

 A.'s, and similar 

 users. Having 

 only a lever to 

 set, and a valve 

 to open, the ma- 

 chine is easily 

 operated. 



VALVE WHEEL 

 CONTROLS AMOUNT 

 OF WATER 



DASH POT 

 CONTROLLING 

 MOVEMENTS 

 OF COILS 



BALANCING YOKE 

 OPERATED BY 

 THERMOSTAT 

 THROUGH GEAR 



VAXVES LINKED 

 TO BALANCING 

 YOKE. THEREBY 



SENSITIVE TO 



ALL MOVEMENTS 

 OF COLLS 



COLD WATER INXET 



