US1271815A - Heat-regulator. - Google Patents

Description

E. H. WHITE.

HEAT REGULATOR.

APPLICATION FILED IAN.10. 191e.'

Patented July 9, 1918.

2 SHEETS-SHEET l.

E. H. WHITE.

HEAT REGULATOR.

APPLICATION FILED 1AN.10| I9T6.

L27L85. Patented July 9,1918,

2 SHEETS-SHEET 2.

WiL/7e3 595 /hre/f/ for;

EVERETT H. WHITE, 0F ST. PAUL, MINNESOTA.

HEAT-REGULATOR.

Specication ofLetters Patent.

Patented July 9, 1918.

Application filed January 10, 1916. Serial No. 71,350.

To all lwhom z't may concern.'

Be it known that I, EVERETT H. WHiTE, a citizen of the United States, residin at St. Paul, in the county of Ramsey and tatev of Minnesota, have invented certain new and useful Improvements in Heat-Regulators, of which the following is a specification.

My invention relates tov heat regulators and has for its object to provide an improved device for making and breaking electric circuits governed by the temperature of theroom in which the device is set,

the vmaking -and breaking of said circuits operating damper controlling mechanism (not shown)by which the furnace is regulated. In carrying out my invention I employ an expansible chamber or set of chambers filled with ether gas as the thermostatic element,'sinceI have discovered'that the use of ether gas in such an expansible chamber gives a maximum of sensitiveness and force of movement of the circuit-controlling member. The contact making member or pointer is pivotally mounted on the support yfor the thermostatic member, which in turn is pivotally mounted, so that the entire thermostatic member may be oscillated relatively to the contact members. In this manner the thermostatic member is adjusted Aso as to operate to close the circuitsv at any desired temperature.

It is a further object of my invention to provide the ether gas containers in f the form of one or more hollow disk-shaped bodies which are held in planes parallel to the plane of movement of the Contact arm. The expansionmovement of these gas containers is a plied to lever mechanism which translates the motion into a plane perpendicular to theline of movement of the point .of application of force from `.the thermostats, this lever` mechanism `greatly simplitying such movement. i i rllhe full objects and advantages of my invention will appear in connection with the detailed description thereof and` are particularly pointed out in the claims. f In the drawings, illustratin theapplication of my invention in one orm,-

Figure 1 is a front elevational view oitf my improved thermostat with the'cover removed and some of the parts shown in dotted lines. Fig. 2 is a'longitudinal side sectional view of the same taken substantially through the center. Fig. 3 is a view similar to'Fg. 2 showing .a derent form et case with part of the same cut away. Fig. 4 is a plan view of the same device shown in Fig. 3 with a guard attached to the case. Fig. 5 is a front elevational view of a part of the device shown in Fig. 4.

My invention comprises a metal back 10 having turned-up edges 11 and 12 to which are attached an ornamental casing or cover 13. The back 10 is of heavier metal than the cover and serves to support the operating parts. APivotally attached to t-he back 10 by a screw 14 is a casting 15 having a bearing shoulder 16 resting upon the surface of back 10. This shoulder allows the casting 15 to oscillate without excess play 'and so holds the parts attached thereto in the proper relation to the other parts of the thermostat. Issuing from the central portion of casting 15 is a lug 17 which termi- ,nate's in two vbosses 18 and 19. Boss 18 is acted upon by heat to'I cause said members to spread apart in the usual manner. At the upper portion of casting 15 are a pair of parallel supports'or lugs 24 and 25 extending out beyond the thermost-atic member 22,

between which'are pivoted at 28 an L-shaped lever having legs 26 and 27. Leg 26 is arranged to be engaged by a peg 23 secured to the member 22, and leg 27 is free to os cillate betvveen'the 'supports 24 and 25 as the members 21 and 22 spread and come together. Pivotally mounted in the casting 15 and in a screw 29 inserted in the boss 19 is a spindle 30 carrying a pointer 31 and a lever32 at right angles to said pointer fast thereon. Any movement of the members 21 and 22 is communicated through levers 26 and 27 by means of a connecting link 33 'to the arm 32, thus actuating the pointer 31. As the arm 32 is relatively short the motion of the thermostatic device is multiplied so that the pointer 31 makes a substantial sweep for only a few degrees change in temperature. t will be noted that the lower end of link 33 is pivoted to arm 32, while the upper end terminates in a reduced portion 34 which loosely passes through 'the leg 27 and is so engaged by it. This expedient is used only for the facility in assembling '5 2, whih um is itself .pivoeed to eleback the device.. lEointel' '31 is'A returl'iedto the.`

positionv corresponding -to the temperature by a spring l35 coiled .about va peg 36 fast in casting/15 and having one end secured in said casting at 37.and.the\ othei' end 38 engaging'pointer A31 through a link 39. Adjustment of-the position 'of pointer 31 may be made by 'rotating members 21 and' 22 .to screwthe stud 20 in its bos`s18,an'd

the same maybe heldin position after' it has been set by a set-screw 73 screwed into the support17 and engaging said stud.I

' Pointer 31'f7serves as a movable contact wmember which engages a number of fixed members 40 and 41, ofxwhich member 41- is*- vthe-more extensive, and several intermediate contact members best shown in Fig. 1. The,

latter contact members comprise. two' end x-"fflnembers 42v and 43.-v Members 40 and 41 are-provided with'ears 44and .45 which are clampedtogether by` screws 46v land 47, thusholdlng all the conta/ct members together 1 and insulated from .each other. The ccmbined contact members th'us formed are ar- 4 rangedin the arc ofa circle whose center is the pivot 14 and are supported fromscrew 46 by a single angular bracket 48 attached to the back 10. The whole can thus more easily be adjusted and alined. Pointer 3 1, as best shown .in Fig. 2, is formed with a contact head 49 which engages the fixed contact members .as the temperature changes and successively .completes the various circuits Y through them. 'All of the contact members I and the pa1t49l of pointer 3.1 may be seen from without the device through a window 72in'the case 13'. 17

contact members. The means for oscillating It willnow be comprehended `that if the casting 15 is rotatedupon the4 pivot 14 the whole thermostatic device Vincluding 'the pointer` will be rotated relatively t0 the' fixed and locking the s amewill now be described.

' Castingl is provided `at'its lower extremity witha peg slidable in a' slot 51 in a lever 10 by a screw 53 passing through -a slot 54 in saidlever. .Lever-52 extends out through the bottom'of the case 13 and is bentforward on itself and terminates ina pointed head 5:5 engageable: in a notched segnient 56 secured to -theback `1 0 through'ears 5 7.l A

'dia' onally-positioned spring 58"l secured Ato 1 lthe l ack 10 andthe llevel' 52te11ds t0 draw the saine tothe right'and upward into engagev ment with the -segment 56e*Y In order to set 55 andthe casting15fshifted.

the device lfor dierent room temperatures the level-'52 is' pulled. downward by the head "israel-s tion 63 from a raised portion 64 of' the lever 52, so that as the lever 59 iskmoved downwardthe lever 52 is 'also moved downward,iandwhen .the catch 63 is near the centevi' of oscillation of -lever .52 the sam'ecom'es' out beyond the head of screw 5 3 and the pointed headv-is` released from the segment .56 and lever 52 drawn to the right by. v

catch A63 is located near screw 53' prevents Vslidingfolf the catch 63 uponfthe feg 61 and hence lfacilitates the `movement of the lever 52. [Lever 59 is given its downward motion by'the ala-rm winding stem 65 of an ordinary alarm .clock 66, removably attached to the' -thespring 58; The release of lever V52 4whenl case 13 'by a snapl lever 73, as. clearly indicated 'in the drawing.. A Alever 67, similar to l lever`52; having ahead 68 engageable in the segment 56 and a groove 69 throughwhich the; screw 53 passes, is used as a vstop fol-.pro-

curing thel desired vro'om temperature vwhen thel levei'52 -is automatically released by thev clock 66. Lever..67 can be set along segment 56 byhand andis held set by a `spring 7 0 connecting it with the back 1 0.

The contactmemlbers, as well as the pointer, are connected to a series of binding posts 72 by leads`71 running along the inside of the back 1U. AThe thermostat may be connected .byfmeans of the'binding posts 72` with any 'suitable form of operating device which Amay be employed to regulate the source of heat.

' In some cases it will be found that it may beV desirable to-have the thermostatic members 21 and 22 in the open,and to this endrll modifythe casing 1 3 to appear asshownfin Fig.- 3. vThe thermostatic' members 21 and A 22 and all the actuating' mechanism within the casing may be the samev as that of the form shownv in Figs. 1 and 2. The case 75 in this form is made with a perfectly .hat

face having an 'aperture 76 ih the same foi' allowing member 22 to protrude out through said case...- Aperture 76-is formed at 77, as

seen in Fig. 5, to permit the supp0rt`15 to' freely oscillate as before described, and

-member 21' fits'l`0osely vinto the aperture`76v to substantially. inclose the operati-ng mecha# nism from the exterior. This form of casing may have a guard 78 attached to its sidesas shown in Figs. 4 ands@ .which'guard-upasses about the thermostatic members 2 1 and 22,y .f

protecting them from injury,"and stillallows currents of air to pass up and'down through itsopenends7 9 and'80 to actuate thejdevice,

and may .also have a thermometer 81 attached to its exterior. L A l.The advantages of my invention are mani-v fest. Placing the thermostatic members in a plane parallel t0 the backl reduces the space occupied by the'device. The 'arrangement of the contact members permits of easy7 ad] ustment of the same. 'The number of parts and theirconstruction renderV the de- 'vice less expensively constructed and insures more positive action.

I claimt.

l..A thermostat comprising a back, an arm formed near the center of said back and spaced therefrom, a thermostatic member secured to said arm,` a pointer pivoted between said arm and said back, a support -formed on the upper portion of said back extending outward beyond the planeof said thermostatic member, a bell crank pivoted to said support having one arm engaging the center of the outer surface of said thermostatic member and the other arm extending at right angles thereto along said support, and a link connecting said bell crank and said pointer and extending between the arm and thermostatic member and said back for operating the pointer. I

v porting member pivotally secured to said Aso back, a thermostatic member fixed on said supporting member, a pointer pivoted upon said supporting member and actuated by said thermostatic member, contact membersv fixed upon said back and engaged by said pointer, a lever slidably pivoted to said back,

a notched segment, a head on said lever en-l pointer, a lever for oscillating said supporting member, means for automatically oscillating said lever, and anadjustable stop for limiting said oscillation.

4. A thermostat ,comprising a back, a supporting member pivotally secured to said back, a thermostatic member fixed on said supporting member, a pointer pivoted upon said supporting memberandv actuated by said thermostatic member, ,contact members fixed upon said back and engaged by said pointer, a lever slidably pivoted to said back, a notched segment; a head on said lever engaging' said segment, a spring for causing said head to engage said segment'and for oscillating said lever in one direction, means for automatically sliding said lever to disengage said head from said segment and release the lever, and an adjustably-positioned stop for limiting theoscillation of said lever.

2. A thermostat comprising a back, a sup- 5. A thermostat comprising a fixed member, a supporting member rotatably mounted thereon, a thermostatic member xed on said supporting member, a projecting member attached kto said supporting member, a bellcrank pivoted to said projecting member having one arm thereof engaging the thermostatc member and the other arm extending toward said supporting member, `a pointer pivoted to said supporting member, a link connecting said last mentioned arm and said pointer, contact members on said xed member engaged by said pointer, a lever movably mounted on said fixed member, a pivotal connection between said lever and said supporting member, means for holding said lever in a definite position, means tending to move said lever in one direction, and means for automatically releasing said lever to permit it to move into another position. 1

6. A thermostat comprising a fixed member, a supporting member rotatably mounted thereon, a thermostatic member fixed on said supporting member, a pair of lugs attached to said supporting member extending beyond said thermostatic member, a bell-crank pivoted to'said lugs having one arm thereof engaging the n thermostatic member and the other armextending toward said supporting member, a pointer pivoted to said supporting member, a link connecting said last mentioned armand said pointer,contact members on said iixed member engaged by said pointer, a lever slidably pivoted to said fixed member, a pivotal connection between one end of sald lever and said supportlng member, a notched'segment secured to said fixed member, a head on the other end of said lever` for 'engaging said segment, a spring for causing said head to enga ethe notches of said segment and for turning said lever in one direction, a U-shaped lever pivoted to said fixed member having one leg thereof engaging a projection on the slidable lever for sliding the same, means associated with the other leg of said U-shaped lever for automatically operating the same to release said slidable lever, andan adjustably positioned stop for limiting the movement of said slidl able lever. i

In testimony whereof I ax my signature in presence of two Witnesses.

' v EVERETT H. WHITE. Witnesses:

F, A. WHiTELnY, H. A. BowMA'N.

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