US1759696A - Balance for oven doors - Google Patents

Description

May 520, 1930.

. J. w. HEARL BALANCE FOR ovsu moons 3 sheets-sneak 1 Filed June 15. 19 28 gmwnto v May 20, 1930.

J. W l -{EARL B ALINCE FOR OVEN DOORS Fihd June 15, 1923 s sheet -sn g 2 II III a: llllll l l l l ldq May 20, 1930. J. w. HEARL BALANCE FOR 0323 D'ooRs.

Fild June 15, 1928 s Sheets-Sheet s Patented May 20, 1930 JOHN W. HEARL, OF BALTIMORE, MARYLAND, ASSIGNOR TOA. WEISKITTELK: SON

00., or BALTIMoREjMARYLANn,

A. CORPORATION OF DELAWARE."

snmmonron ovEN DOORS Application filed June 15, 1928. Serial a... 2 5,514.

This invention relates to improvements in door hangings and balancesffor cook ng ovens.

One object of the invention is to provide an improved Construction of hanger for an oven-door whereby when the latter is swung down to a horizontal open position, it will beyieldingly'checlredl Another object is to provide an improved construction of balance'for oven doors which will be completely concealed, and

A further object is to provide an adjustment for 'oVe'n doOr balances which'will be lo'cated on the outer sidev of the oven and removed from the intense heat therein whereby more uniform accuracy in the balance may be maintained. r

" With these, and other objects in; view, the

. invention is illustrated in the accompanying drawings, wherein,

Fig. 1 shows a gasrange in front elevat on embodying my invention; i

' Fig. 2'illustrates a vertical-sectional detail on an enlarged scale, taken through the'oven structure'on the line 2'-2 ofF-ig. 1;

Fig. 3 shows another vertical's'ectional detail through the oven with "the inner side wall of the oven rcn'o'oved Fig. 4 illustrates a' horizontal cross-seetional detail through the oven,''the section being taken on the'line' 4%4 of Fig. -3"hut' with the inner o'venwa'lls in place.

Fig: 5 shows a diagrammatic PBISPGClJlVB In the structure shown, thej'invention' is 'suflicient thickness tO PI V I' B t es applied to an oven ofagas 'range ofconven tional form wherein the cookingtop l3 is lo'eated 'at' oneside of 'th'e oven with the usual gas 'suppl'y pipe lflifand burner valves shown'infront elevation in-i Fig; 1 ofth'e' drawings.

perspective, the de The particular construction of' the oven is not essential to the'invention, but in this'instance, there are upper and lower oven chain bers 16=and17 separated bysuitable ' parti tions 18, 19 and 20 which latter form respec: tively a bottom for the upper chamberjjan air-space and a top for the lowerch'amber.

'A rear vertical plate provides ade'ad air-space at the rear "of-the oven-chambers, while side plates 21 and 22' servethe same function at opposite sides so as to produce one vertical sideair-sp'ace 23" at ones'ide and another vertical side air space "24catpthe opposite side of the oven-chambers.

A top-plate 25 also produces an air-space over the upper oven chamber. A bottom- 26 is provided in the lower oven-chamber.-

The entirefrontoftheoVen from the top of the upper chamber to the b-ott'om'of thev lower chamber is closed by a front cast metal frame 27 which is shown detached and in perspective in Fig. 6- of the drawing."-

It is not essential to the invention as to just how the oints are e'fl'ected'between the walls and to the top by bolts 29, as shownin Figs. 3 and 4 of the drawings.

The bottom of the front frame has-a depending flange 30 which projects down on the inner side of the band. or strap12'as can beseen in Figs. 2 and 30f the drawingsi 31 and a lower opening 32 horizontal cross-bar 33.

a Each upper and lower opening is providecl with a door-receiving recess'34 with top, side and. bottom "stop-flanges 35,? and in the opposite lower corners of the said'open ings, the side and bottomstop flangesare cut away to forma notch 3.6 andtozalsoenable a rounded bearing face 37 to be formed onthe upper sides and-ends of the cross-bar33 at said corners, for apurpose that will presently be explained.

The doors 38, are of the drop type,.inithat each is mounted at its loweredge to the front frame and swings down to a horizontal position at said front openings.

The doors 38 have two side bars 39, whose inner ends project beyond the inner edge 40 of thedoor proper, as clearly shown in Fig;

' .5 and each of these inner projecting ends has a bearing-head 41 with a rounded bearing notch 42 at its under side and with a stopshoulder 43 at its upper side and slightly to the rear of said notch.

The bearing-notch 42 in each head corresponds in shape to and fits and seats upon the bearing-faces 37 at the end of the cross-bar 33 of the front frame, while the rear edge of each notch has a hook formation 44 which extends around the bearing face .37 far enoughto prevent the door, from drawing forward and becoming disengaged from said bearing faces when the door is swung down,

as shown in Fig. 3 of the drawings.

- When the; doors are in place, the bearing 7 heads 41extend through the notches 36 ber neath the vertical side stop-flanges 35, and

' door has a laterally-projecting pin 47 while the bearing-head 41 at the opposite side of 'the lower oven-door has asimilar lateral pin 48,the purpose of which 48 will presently 'be explained. Below the bottom 26 of the lower oven-and pins 147 and V secured against-theloutermost side wallsare its two stud- plates 49 and 50 respectively.

These stud-plates 49- and 50 are located at opposite sides andnear the front of the'oven structure but directlybeneath the side air spaces 23. and 24.

The plate 49 has a stud 51 while the plate 50 has a stud 52,.and these studs carry levers 53 and 54 respectively whose functions are quite similar to those of bell-crank levers, as

' will presently more fully appear. I

- The bell-crank lever 53 has a rod '55,]connecting one end of it with the stud-47, of bearing-head 41'on the'upper door while the bell-crank lever? 54 has a short link-rod-56,

; p n ct ng ity and the stud 48 of the bearing-head on the lowerdoor.

' It will be understood that the lever and :rod connectionto the upper door is at the left-hand side of the oven and door while the lever and rod connection to the lower door is atthe right-hand side of the oven and door so that one connectionwill' not ink terfere withthe other. a

The bell-crank lever 53 hasits other end connected to a coil spring 57 while. bell;

crank lever 54 has its other end connected to a similar coiled spring 58. j i

These twocoiled springs 57 and 58extend horizontally beneath the bottom 25 of the lower oven in a direction from front to rear of the ovens and the rear ends of these springs are attached to screw-threaded rods 59 which i extend rearwardly'andhorizontally and pass through the band or strap 12 at the rear of the stove. YVing nuts 60 are provided on the rear ends of the rods 59', at the outer side of the strap whereby the rods may be drawn rearwardly by adjusting the wing nuts at the rear of the stove and on the rod-ends to stretch the coil springs 57 more or less, and thereby adjust the tension of the latter.

57 and 58 are connected indirectly to the upperv and lower oven doors'respectively andiby pulling on the bellscrank levers 53 and 54,

and through them drawing the rods 55 and 56 downwardly serve as checks when the doors are opened and also serve, when the doors are closed, tofhold the latter in the closed positions.

It Will further be noted that the 10611 It will thus be seen that the coiled springs cranks, hangers, springs and adjustable rods are 'allremoved from the heatof the ovens wherethe tendency of the springs to expand 1 and contract is reducedto a ininimum and a 7 more uniform and constant pull is maintained.

It will further be seen that the adjusting a '95 wing-nuts 60 are alsolocated on the exterior of the stovejand at therear thereof where they are accessible for adjustment at anytime,

- so that these adjustments may. be made without detaching spring casings or removing oven linings. 7 .7

Having described my invention, I claim,-

1. In a stove oven structure the combinalllOIlWltll an oven with vertlcal air spaces'at opposite sides thereof, of an oven-front provided with a door-opening which opening has bearing surfaces at opposite sides of its lower edge, a door-having two side bars whose in ner ends project inwardly beyond thehingeedge of the door proper and eachof saidprojecting bar-ends. having. a bottom. 'edge;'

notch,'the said bottom edge-notches. engaging the side bearing surfaces at the lower edge of the oven-front door-openingand in ver-- 1 'tical alinement with the air-spaces at the sides V V of the oven, 2. stud-plategsecured to the outer wall of the oven structure below the side I air-spaces, a bell-crankqlever carried on said stud-plate and movable in a 'verticalgpl'an'e parallel with-said side air spaces,ia connection between one end of the bell-crank lever and one projecting end; of af door above'it and a coiled spring extendingi'in' a direction" between the front and rear 'of the stove and 4 having its front end connected'to the other end of the said bell-crank lever.

tion with outer and inner spaced walls form;

ing'an ovenwith vertical side airspacesbe tween the same and with horizontal partitions to form an upper and aloweruoven-i 12s '2. Ina stove oven structure "the combine 1 I I chamber, of a front for said oven having upper and lower door-openings, a door for each of said openings and each door being hung at its lower edge so as to swing up to close its opening and down to expose said openings and each door having two side bars whose inner ends project inwardly beyond the hinge-edge of the door and form bearing heads the said bearing. heads extending edgewise into the vertical air spaces at the sides of the ovens, a stud-plate secured to one outer side wall below the lowermost oven and below the side air space at one side thereof, another stud plate secured to the other outer side Wall and also below the said lowermost oven and the side air space at the opposite side of the oven, a bell-crank lever carried on each stud-plate and each lever swinging in a vertical plane parallel with the side Walls of the oven, a connection extending upwardly from one end of one bell-crank lever at one side of one door above and engaging the bearing head of one door, a connection extending upwardly from the other bell-crank lever and at the opposite side of the doors and engaging the bearing-head on'the opposite side of another door above, two coiled springs ex tending horizontally between the front and back of the stove below the lower oven-chamber,*one spring having position directly beneath one side air space and the other directly beneath the opposite side air space, and one spring engaging an end of one bell-crank lever while the other engages an end of the other bell-crank lever, separate rods engaging the other ends of said springs and each rod projecting rearwardlyto the back ofthe stove, and means at the rear ends of said rods to adjust the same and vary the tension of the coiled springs.

In testimony whereof I afiix my signature.

JOHN W. HEARL.

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