US843093A - Heat-regulating apparatus. - Google Patents

Description

PATENTED FEB. 5, 1907.

N. E. NASH. HEAT REGULATING APPARATUS.

APPLICATION FILED NOV. 21,1905.

- Maid- 01;

NATHAN E. NASH, F TORONTO, ONTARIO, OANADAL HEAT-REGULATiNG APPARATUS- No. seegoes.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed November 21, 1905.. Serie1No-288,353.

To all whom it may concern.-

Be it known that I, NATHAN E. NASH, o

the city of Toronto, in the Province of On-' ratus' in which the Opening and closing of the' radiator-valve, or that valve which adnits steam or hot water to a radiator, is effected, primarily, by a thermostat which in its rr.ove ment consequent upon a chan e in tempera ture of the air surrounding the thermostat controls the adnission to and the discharge of air from a diaphragm ada ted to either open arran ed, the reverse movement being effecte by a spring.

The principal'object' of the resent invention is to reduce "the expen iture of compressed air used asthe motive force to actuate the. diaphragm of the radiator-valve;

and the invention consists in a peculiar eon-' struction of certain air-passages in the heatre 'ula'tin apparatus and the controllingvalves us bd in connection with the said airpassages, whereby direct communication between the tank in which the compressed air is stored and the atmosphere is only 1130- mentary or during-the period of timerequired by the said valves to pass from one extreme position to anothera period so minute as to be hardly appreciable.

In the descri tion of the improved apparatus which fol ows reference is made to the accompanying drawings, forming a part hereof, and in which- Figure 1 is a vertical side section ofthe improved heat-regulating apparatus, andFig.

2 an exterior front view of the same.

Referring now to the drawings, 1 is a shell having the inlet and outlet nozzles 2 and 3, adapted for connection by means of pipes,

(not shown,)' respectively, to a source. of supply of air under pressure, such as a tank, and

" the motor (not s own) whereby the radiatorvalve'is operated in one direction, and in the resent case that in which the valve is closed. The body of the shell 1 is shown as in two parts a and b, the former, which is provided with the nozzles 2 and 3, being designed. as a permanent fixture on the Wall of the'building or close the radiator-va ve, as may bev and'the latter removable. The two parts a andb are held together by means of screws. (Not shown.)

4 is a valve-chamber situated in part b of the shell 1 and in communication with the nozzles 2 and 3 bymeans of the air-ducts c and (1, respectively. Thesaid valve-chamber is covered by the screw-plug 5, which is provided with a polygonal head, whereby the plug is screwed into position withthe inner surface of its head closely in contact with the outer surface of the shell. 'The inner end of the ductc is adapted as a valve-seat e, and the plug 5, which has a centralaperture, f, is similarly arranged, the valve-seat being de-- noted by g. a

- 7 is a double-faced valve situated in the valve-chamber 4, having a stem h, which passes loosel through the aperture f, and provided wit a disk 9 at its end.

10 is an air-chamber situated exteriorly of and at the front of the shell 1. It is formed by a ring i and a recessed head 7', and the two parts are held to the shell 1 by means of' screws k. I

12'is an extremely thin slightly-dished dia- P g stance, .as hard- 00 per-held tlghtl between the ring '6 an the recessed hea j by screws k, and the disk 9 of the valve-stemh is 8o preferably of metalsuch, for min contact with the inner and dished surface of the said diaphragm when the valve 7 is on the seat e. i v 13 is a second valve-chamber in the part b of the shell 1. a It contains a valve 15, which, like the valve 7, is double-faced and is prosults hereinafter described.

a transverse area 18 is a passage hav ng the stern m passes, is considerably 9.5

which-is much less than that of the aperture 72}, leading from the duct c to the second valve-chamber 13, and at its endis formed a seat for the valve 15 The second seat for the valve 15 is at the inner end of the aperture n.

19 is a second passage which connects the air-chamber 10 at a point exterior of the diaphragm 12 with the valve-chamber 13 and is constantly in communication with the said chamber and at times open to the atmosphere, as hereinafter described.

is a curved thermostatic blade constructed, 7 preferably, of plates of steel and zinc, one end of which is secured in any suitable'manner to the part b of the shell 1, and the other and free end provided with a screwsleeve 0, having a comparatively coarse exterior thread and a much finer internal thread.

' 22 is a screw within the sleeve 0, the end of which is in contact with the end of the valvestem m when the apparatus is in use. l

- 23 is a cock-key whereby the duct 0 may be closed to prevent the escape of compressed air from the air-tank in case the part b of the shell, with its attachments, should have to be temporarily removedfor repair.

24. is an indicating finger or pointer secured to the sleeve 0, which may be moved circum-. ferentially by hand to alter the position of the end of the screw 22 with respect to the end of the valve-stem m, and p a dial suit ably marked with numbers representing different temperatu es.

The whole apparatus as described is covered by an ornamenal open-work casing, whereby it is fastened to the wall of the room in which a uniform and predeterminedtemseen that in the seating of the valve 15, as, described, the air which had been confined perature is to be maintained. This casing, however, is omitted from the drawings, as it embodies no part of the present invention.

The operation of the apparatus is as follows: Supposing-the various parts of the apparatus to be arranged with respect to. each other, as shown in the drawings, with the radiator-valve held open by its spring, and that the temperature of the surrounding atmosphere is to be maintained at the sleeve is turned until the pointer indicates 70 on the dial. The screw 22 is then withdrawn from contact with the valve-stem m until the atmosphere of the room reaches the predetermined temperature of 70, when the said screw turned in a reverse direction until the valve 15 closes the passage 18. It'will be above the diaphragm 12 in the chamber 10 has now free access to the outer air by means of the passage 19, the valve-chamber 13, and the aperture n. Consequently no resistanceis offered to the outer movement of the said diaphragm, as hereinafter described. The valve 15 being seated as described, the full pressure of the compressed air acts on'the valve 7 and causes that device to be forced from its seat e and brought into contact with its outer seat g, the dia hragm 12 being lifted in the movement. he compressed air then passes through the duct d to the diaphragm of the radiator-valve, and the valve, which up to this time hadbeen open, is closed,

thus preventing further admission of steam.

to'the radiator. As soon as the temperature of the air surrounding the apparatus is slightly lowered by radiation the contraction of the zinc element of the thermostatic blade causes the pressure of the screw 22 on the valve-stem m to be reduced and the valve -15 is unseated. I have before stated in subaperture '11,, and 15 the area of the stem m of the valve 15, and that the air-pressure is ten pounds per square inch. When the valve 15 has closed the passage 18, the force necessary to keep the valve seated would be represented by 100, which figure is obtained by multiplying the area 10 of the passage 18 by the pressure per square inchviz., 10thus 10 X 10 100; but the moment the valve is unseated it is subjected to a pressure represented by 150, this figure being'arrived at by multiplying the area 15 of the valvestem by the air-pressure of ten pounds per squareinch, thus: 15 X 10 150. 1n this case the area of the aperture 6 niust not be takeninto consideration. The valve 15 is then moved rapidly outward and suddenly closes the aperture n, and the end of the thermostatic blade 20 being elastic is pushed outward in the movement through the medium of the screw 22. As soon, however, as the aperture 71. is closed, the area of the valvestem m ceases to be a factor in the operation and has not to be taken into consideration. Consequently the valve 15 is held to its second or outer seat by a pressure represented vby 200 and securely held in' its new posi tion, or that shown in the drawings. The pressure 200 is found by multiplying the area 20 of the aperture n by the pressure 10, thus: 20 X 10 200. ,It will be understood that when the aperture n is closed by the valve 15 communication between the outer surface of the diaphragm 12 and the atmosphere is suspended, and the fullforce of the compressed air acts on the said surface, which causes the diaphragm to move inward, thus seating the valve 7 on its seat e, whereby the duct 0 is again closed and the air which had been keeping the radiator-valve shut escapes through the channel 27, thereby admitting of the action of the spring, which then opens the radiator-valve. From the foregoing description it will be understood that practically no air escapes directly from the air-tank, and the only air that does es cape is that which is confined at each opera- Iio tion of the apparatus above'the diaphragm apparatus the room has risen'slightly above 70 a reverse action of the thermostatic blade takes place, with the result that when the pressure of the screw 22fupon the valve-stem m is increased beyond 200 the valve 15 is un-v seated, and then, in view of the difierential areas of the stem m and the aperture n, the

resistance is lowered from 200 to 150, which change ractically assists the bladein effecting the cibsure of the passage 18. The, is now in the condition injwhich steam is again out ofl? from the radiator, and it remains cut ofl until the temperature falls I below the predetermined point.

I claim as my invention' I 1. In aheat-regulating apparatus comrising a valve-chamber-having a assage eadingtherefrom to a source of supp y ofair under pressure, and an aperture extending from the said valve-chamber to the outer air, the transverse area of the passa 'e' be" less than that of the aperture, a oubleaced valve situated within the said valve-chamber having a stem which extends through the a erture to the outer air, and a thermostatic b ade to directly actuate the said valve through the medium of itsste'm, andin its vibrationclose either the said passage or the outletraperture, substantially as specified.

2. In a heat-regulating apparatus, ashell having an inlet and an outlet air-duct, which ducts converge in a valve-chamber, an airchamber n communication with the valve over the end of the valve-stem, combined with a second valve-chamber having an airescapea erture and apassage leading to the I outer si e of the said diaphragm, adouble 45 faced valve situated within the second valve chamber having a'stem which asses throu h the said air-escape aperture, t e two doubifaced valves coacting to prevent a continu ous escaEe of air from the source of air-sup-. o

- 1 to t e atmosphere, and a thermostatic lade which i its vibration due to chan e in temperature o the air, operates to esta lish communication between the inlet-duct and v the air-chamber at a point above the dia- 5 5 phragm, or "to cutofi such communication and expose the outer side of the diaphragm to the air, substantially-as specified.

" NATHAN E. NASH.

Witnesses: c

THOMAS G. HULL, WM. T. HOWARD.

leading-to the air-chamber and a 40

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