US938548A - Thermostat. - Google Patents

Description

J. H. BRADY.

THERMOSTAT.

APPLICATION FILED 0011.21, 1907.

Patented. Nov. 2, 1909.

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JOSEPH H. BRADY, 0F KANSAS CITY, MISSOUR.

THERMOSTAT.

Specification of Letters Yatent.

Patented Nov. 2, 1909- .Application filed October 21, 1907. Serial No. 398,315.

perature of apartments by controlling theheating or the ventilating apparatus thereof.

My invention embraces a valve mechanism for controlling the flow of a suitable motive fluid employed in communicating the action of the thermostat to the regulating valve of the apparatus; and one object is to arrange the valve mechanism on a base so that it may be removed from the thermostat intact when it is desired to adjustor repair said valve mechanism.

A further object is to provide simple means for imparting a long` stroke to the valve of the thermostat, and with this end in View I employ two media upon which n rising temperature hasI the opposite eli'ects of expanding one and contracting the other.

. These media are arranged to move in the same direction when alt'ecled by variations in temperature, and one of them is connected to the free end of the other and the valve mechanism so that the combined movements of the media will be transmitted t-o said valve mechanism.

In order that the inventionmay be fully understood reference will now be made to the accompanying drawing,'in which z* Figure 1 represents an irregular vert-ical section of the thermostat on line l-l of Fig. 2. Fig. 2 is a side elevation of the same, partly in section on line IP-II of Fig. l. Fig. 3 is a transverse section on line lll-- Ill of Fig. l. Fig, a is a plan view of the thermostat with its cover removed to show an indicator whereby the thermostat `set to act at a certain temperature.

In carrying out the invention, l employv a bracket 1, provided at its horizontal portion with a circular shoulder 2, which is threaded to receive the threaded lower end of .a chamber 3, wherein the valve mechanism of the thermostat is inclosed to protect it from injury or from being ytampered with. The upper edge of the chamber wall has an annular ffroove 4 forming a seat for the lower end of a tubular medium 5, which is drawnV rmly to its seat by screur-threads 6. Medium 5 consists of'ebonite' or other material, which will expand when subjected to a rising temperature, and being' firmly secured at its lower end it is obvious that any movement caused by expansion will be up,

ward. The upper lfree end of medium 5 is closed by an annular cap 7 having a peripheral flange 8, which is adjusted tlghtly into contact with the upper end of the medium to form an air-tight joint. The upperv endvof cap 7 is normally closed by a removable.

chamber 3 and adapted to be connected atv its outer end to a pipe leading from the source of motive fluid not shown. Pipe 10 enters chamber 3 through bracket l terminates in a goose-neck 11, provided at its discharge end with a nipple 12 having a valve-seat in its lower terminal.

13 designates a tubular screw'extenidmg into chamber 3 through the horizontal portion of the bracket and provided at its upper terminal with a valve-seat arranged in ver tical alinement with the valve-seat in nipple 12.

14 designates a valve having attenuated terminals adapted to alternately engage thel valve-seats for the purpose of shutting ott the [low of fluid into chamber 3 and medium 5, or permittingV its escape from the same, after beine` used, through the exhaustport 15 extending' through screw 13, which latter may be adjusted toward or away from the valve to time the seating of the same. Nipple 12 is likewise adjustable on the gooseneck for the same purpose.

Valve 1st is pivoted to one end of a lever 16, fulcrume-d between the jaws 17 of a stem 1 8 and arranged in about the proportioirof to one, so that its valve-carryirrg end will have considerable more' throw than its opposite end.

19 designates another stem having a pair of jaws 20, between which the lever extends so that the same cannot move laterally and ing preferably of the following ingredients; nine parte lead, two parte antimony, and'one part bien'iuth. Said medium extends lnpwardly into medium 5 where it is provided With a guidedisl which loosely engagea the inner vertical surface of .medium The upper end et medium .21 has a tl'ireaded here 2% for the reception of the lower end of a screw extending upward through cap T and provided with a pointer 2G, 'which in conjunction with a circular 2i", stamped on the Cap, forms an indicator for setting the thermostat to act. at any desired degree of temperature. Pointer QG rests upon. a sleeve 28 and fits upon the rectangular portion 29 of screw 25, so that when. it is turned te the right orlet't it will turn the screw therevith and ez ufo it to raise or lower medium 2l for the purpose of adjusting' Valve 14 in proper relation to nipple l2 and tubular ser/eu7 13. Screw 25 is prevented from moving` upv or down with medium 2l hy an integral shoulder SO, engaging' the underside of eap?, and a nut 3l on the npper end ofrscrew Q5, hearing upon a Washer 32 interposed between the cap and the pointer.

33 designate` an outlet pipe leading,y from chamber 3 to the valve of the heating, or Ventilating` apparatus, t not shown).

i-issurnineV that the thermostat has heen setto :1ct at seventy degrees, medium 5 will expandv and lift medium 2l when' the teinperature rises above this point. Medium 2l. Will in turn contract and the nieve-@nent of the media is upward valve lflwill be unseated i'roxn nipple l2 and seated in screw l, eo that. the.. motive Huid will he tree to enter chamber 3 and niediuin and [low thence through pipe to the valve of the appura tus which is thereby closed and shuts oif the heating' agent-. When the temperature fallei below seventy degrees medium 5i cont 'acts VWhile medium 2l expanda/so that the con)A bined movements of both-will seat valre ll in nipple 12 anduncover port l5. The motive fluid in chamber 3 and medium 5 will then exhaust through port l5 and Ipermit the valve of the apparatusto open. Fur- ,ther expansion or contraction of the media ai'terfvalve le has become seated is permitted by medium 21 which is curved at 21 so that ih may yield more or less. f

Pipes 10, 33, screw 1B, and the valve Ineehy anisrn is carried by bracket l so they may he removed together with said bracket when it is desired to repair or adjust any of the parte, und in order to effect this removal it is' only "necessary 4to disconnect screw Q5 from `medium 2l, or unscrew nut 3l from .the upper end of screw 25 so that medium' Qi `mny be removmlwith brackets l and the parte carried thereby. lVhen the parts leplucqpl guide centers the upper end of medium YI nuthin medium .e0 that 1t may be en by the screw or if' Said screw be removed with the dium the guide will hold the screw in line with. the central open ing in eap 7 so that the screw will reaelily enter id opening. A

llavine thuis described my invention, what .l claim W l.; n thermostat coneietin oi a hollow niediuni which. expande under a riaing tem peratnre, a chamber communicating with the lower end et said niedinnn un inlet pipe 'for conductingv motive .tlnid to vid chamber, terminati: in a goosenecli having a valve seat in it tering the chamber having an enanst-pert and a valveseat in axial line ivigh the iirstnientiemxd valve-seat, a valve for alternately ing the ralrescata a second inediuin which contracts under a rising temperature and connected. at its ends to the free end of the tiret niediuni and the valve, so that the added movements of the niedia will be transmitted to :raid valve, and an outlet pipe for conducting the inotire luid ironi. the chainber to the point ot nee.

9.. A thermostat consisting oit' a hollow inediuln which expande under a rising temu Jerature, a chai'nber cennniunioatinr with the loner end oit Said medium, an inlet pipe t'or conducting motive lluid to Said chamber, ter- Initiating in a gooee--ileek,` a member adjustahly engaging one end of Said gooseneclr and terminating in a valve-seat7 a screw entering the einher having' an exhaustport and a Valve-Seat in axia line with the tirstnnentioned valveseat, a twoefaeed valve for altmnately eiigaging the vali/escats5 a lever to one end ot which said valve is pivotved, u second medium which contracte under a fising temperature and is connected at its and outlet pipes for tendnoting` motive fluid to and from th chamber, and having an eX- haust port. leading from the chamber, said 1 inlet pipeentering Suid chamber' adjacent said exhauet port and being .irovided with a mouth suspended concentriezdly opposite said exhaust port, a Avalve having opposite faces adapted to alternately close the inlet pi e and the exhaust port7 means for holdingtiie inlet and outlet pipes and the valve meehanisrn from which the expansihle medium may be removed and means connecting the valve to the tree end of the medium.

e. A thermostat conaiat-inl;c of a hollow medium which expande under a rising tempera? ture and ie provided at ite` upper engi? with lowntnrned endTv a member ena second medium contractible as saidfirst an annular scale, a removable base having a cylindrical extension supporting said hollow medium and forming a closed chamber therewith, Valve mechanism carried within said extension, and means connecting said valve mechanism with lsaid expansible medium, said valve mechanism comprising a goose necked inlet pipe provided at its downturned end with a valve seat, an adjustable exhaust port pipe also provided with a valve seat in axialalinement with said inlet valve seat, an outlet pipe and a two way valve plug operable by said connecting means to alternately open and close said inlet and exhaust port pipes.

5. A thermostat consisting. ot' a hollow medium which expands under a rising temperature, bodily removable valve mechanism supported at one end of said medium within a chambered base, and means connecting said medium with said valve mechanism whereby to utilize the expansion and contraction of said medium to operate said valve mechanism, sa'id valve mechanism comprising an inlet pipe having a downturned adjustable valve seat, an exhaust port pipe also provided with a valve seat disposed oppositely to said inlet valve seat, an outlet pipe and a valve operating. between said exhaust port and inlet valve seats to alternately open and close said outlet and inlet, with the expansion and contraction of said medium.

A thermostat comprising an expansible medium, a chambered base at its lower end, the chamber thereof being open to said medium, valve mechanism inclosed by said chambered base, said valve mechanism comprising outlet, inlet and exhaust pipes, said inlet and exhaust pipes being concentrically and oppositely disposed, a valve operative between said inlet and exhaust pipes and a pivoted lever adapted to move said valve,

medium is expansible supported by said irst I medium at its upper end', and connecting it with said valve mechanism whereliy to utili ize the resultant of their added movements when affected by heat to operate said valve.

7. A thermostat comprising a medium expansible under caloric iniuence, a second medium contractible when said first medium is expansible and valve mechanism supported in operative relation thereto, said valve mechanism comprising outlet, inlet and exhaust pipes, said inlet and exhaust pipes being concentrically and oppositely disposed, a valve operative between said inlet and exhaust pipes, anda pivoted lever adapted to move said valve, whereby the resultant of their added movements when affected by caloric influence may be utilized to operate said valve mechanism.

8. A thermostat comprising in combination with a hollow medium expansible under action of heat,` a base portion supporting said medium and comprising a' chamber,

valve mechanism mounted in said chamber .comprising an inlet, outlet and an exhaust.

ort pipes, anoscillating valve operating )etween said inlet and exhaust port pipes, and a second medium contractible under the action of heat, said second medium connecting said first medium. with said oscillating valve whereby to utilize the resultant of the added movements of said mediums under the action of heat to operate said valve, said second medium comprising a rodconnected at its upper end to the upper end of said first `medium and connected at its lower end to said oscillating valve, and having means for adjusting said rod at its upper end and -having intermediate its .length an ott'set portion whereby to compensate tor the expan-' sion of said medium after said valve is seated. A

In testimony whereot I attix my signature` in thil presence of two witnesses.

'JOSEPH Il. BRADY.

W'itnesses F. Gr. Fisonlcn, M. Cox.

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