US1717637A

US1717637A - Observation window for furnaces

Info

Publication number: US1717637A
Application number: US51959A
Authority: US
Inventors: Ray P Vastine
Original assignee: GEORGE M VASTINE
Current assignee: GEORGE M VASTINE
Priority date: 1925-08-24
Filing date: 1925-08-24
Publication date: 1929-06-18
Anticipated expiration: 1946-06-18

Description

Jun 18, 1929. v s-n 1,717,637

OBSERVATION WINDOW FOR FURNACES Filed Aug. 24, 1925 5 Sheets-Sheet 1 y l 20 H L h 40 A I I I A 9 7 I I I 1 I 1 1 (:5 I 1 I [4 /Z Z7 257K I v *7 5 June 18, 1929.

R. P. VASTINE 1,717,637

OBSERVATION WINDOW FOR FURNACES Filed Au 24; 1925 5 Sheets-Sheet 2 June 18, 1929. R. P. VASTINE 1,717,637

OBSERVATION WINDOW FOR FURNACES Filed Aug. 24, 1925 5 Sheets-Sheet 4 WQ T 62 57 5a June 18, 1929. p, VA$T|NE. 1,717,637

OBSERVATION WINDOW FOR FURNACES Filed Aug. 24, 1925 5 Sheets-Sheet 5 gu tar-27:72": BgyPU&sZ-ine.

Patented June 18; 1929.

UNITED STATES amen eArsnrorriee;

RAY P. VASTINE, OF CHICAGO, ILLINOIS, ASSIGNOR TO GEORGE M. VASTINE, OF

1 CHICAGG, ILLINOIS.

OBSERVATION WINDOW FOR FURNACES Application filed August 24, 1925. Serial No. 51,959.

This invention relates to a device for perniitting the interior of a furnace or the like to be viewed from without, without necessitating the iu cning of any doors or closures. it is particularly desirable to view the interior of furnaces or the like to ascertain the character of the combustion or the manner in which the heat therein isetfecting the elements being treated without having to open a door or a peep hole, as such opening causes a loss in elliciency due to either the cold draft on the heated parts in the furnace or a flare back of the heat from said furnace. Ordinarily no transparent material r such as glass will stand the high heat of the furnace in order to permit its use in a device of this kind. In my copending application, Serial No. 746,962, I described a manner in which he heat might be so rechiced near the exterior of the opening in a side of the furnace so that glass or similar substance might be used in said opening for the closure thereof.

it is an object of this invention to provide an improved means for reducing the heat near the exterior of the opening.

It is further an important object of this invention to provide a device of the class described in the above mentioned copenijling application which will provide a maximum view of the interimof the furnace. It is also an object of this inventim'i to provide a device of this type which is simple and rugged, which may be economically manufi'ictured and conveniently installed and used. c

it is further an important objectof this invention to provide a device of this type having a forced draft circulation for reducing the heat transferred to the outer end of the observation passage.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a detail side elevational view of a device embodying this invention, with parts omitted and detached from the furnace.

Figure 2 is an enlarged horizontal fragmentary section with parts removed taken at the line II-II of Figure 1. t

Figure 3 is an enlarged fragmentary frontelevational view with parts omitted of the device shown in Figure 1 showing the same attached. to a furnace. i t

Figure 4 is an enlarged verticallongitudinal fragmentary section with parts omitted taken at the line 1V-IV of Figure 3.

Figure 5 is a, transverse vertical section with parts omitted'taken at the line V-V of Figure 1. y

Figure 6 is a detail enlarged fragnicntary vertical transverse section with parts omitted taken at the line VI-VI of Figure 4.

Figure 7 is-a side elevational view of a modified form of the device embodying this invention showing the same in position in the side of the furnace.

Figure 8 is a vertical longitudinal fragn'ientary' enlarged section with parts omitted of the device shown in Figure 7.

Figure 9 is an enlarged detail fragmentary view with parts omitted of means for automatically controlling the flow of air around the outer glass plates otthe device.

Figure 10 is an enlarged detail horizontal fragmentary sectional view taken at the line X X of Figure 8 with parts omitted.

As shown on the drawings:

Referring to Figure l which illustri ites a device embodying this invention for use on furnace doors, there shown a hollow outer casing l of rectangular flaring cross section which din'iinishcs the intensity of radiation from the furnace aswell as increases the view obtainable therethrough. The casing 1 is provided with transverse integral annular ribs 2 on its exterior to provide a greater surface to radiate the heat conducted through the walls thereof. The outer end of the casing 1 provided with an integral flange 3 and the inner end of said casing is provided with an integral annular flanged. An annular supporting member 5 receives therein on the right side thereof flange 3 and on the left side thereof it receives a rectangular shaped rim 6. (3' (Figure 3) extend through the rim 6,

the annular member 5 and the flange 3 for clamping said annular member lJiet-ween said a rim and said flange. At the upper end of the rim 6 is a pair of forwardly extending integral supports 'Twhrch pivotally support Suitable bolts.

' edge of the. rim 6 through a recess in the upper edge of a vertically extending integral portion 13011 the annular member and into said chamber 10. Integral with the annular.

member 5 and 'coi'nn'iunicating with the chamber 10 1S a hollow portion 1 l. The portion 14 is flanged at its bottom edge and 'is provided with hearing members near its lower edges forsupporting a transversely extending rodi15 (Figure 6) which has pfivotally mounted thereon a circular clo sure plate 16. The plate 16 is balanced by an integral arm 17 which is deflected out of the plane of said plate. lVhen the plate 16 is closed, the arm 17 will extend upwardly and when the plate 16 is open the arm 17 will assume a horizontal position. Secured to theflange on'the lower edge of the portion 14 is a plate 18. The plate 18 is provided with a circular aperture 19 on the right side thereof as viewed in Figure 6 which when the plate 16 is closed communicates with the bottom side of the latter and is closed thereby. The plate 18 is also provided with an integral hollow cylindrical member 20 communicating with'the'interior of the portion 14cfby a suitable opening in "said plateheneath the arm 17 so that when the latter is in horizontal position it will abut the plate 18 at the left edge of said opening. I

Extending inwardly from the rim (3 integraltherewith and communicating with the outer side thereof by a central opening therein is aninner casing 21 spaced from the outer-casing to provide a space or passage thcrebetween for the circulation of a cooling medium. The casing 21 converges from its outer end-to its inner end in the same inanner as the outer casing 1 and is of rectangular cross section, the sides thereof being substantially parallel to the sides of the outer casing 1. Longitudinal outwardly eX- 7 tending ntegral 1ll)S 21 are provided on the 7 sides of the casing 21'. Extending across of the interior of the furnace.

the outer opening of the inner casing21 is a grid 22, which tends ,to further decrease the radiation toward the glass without mate" riallyobstructing observation therethrough are provided on opposite vertical sides of the grid 22 for securing said grid to the rim her 10.

Flanges 23 ally extending apertures 26 near its inner end.

The inner frame 9 has mounted therein a rectangularly shaped glass or substantially transparent plate 27 which is aligned with the

grids

22 and 24 but which is considerably larger in area. than the outer end of the casing 21. The frame 9 is also provided with a horizontal transverse aperture 28 in its upper portion anda similar aperture 29 in its lower portion. The rim 6 is formed with a recess 30 communicating with the aperture 2S) and having its edges snugly fitting the inner edges of the latter. A horizontal transverse aperture or port 31 in the rim 6 connects the recess 30 with the cham- Surrounding the bolt 12 at its inner end is a compression spring 32 held against rearward movement on said bolt by a diametrically positioned pin 33 inthe end of said bolt. A washer 34 surrounds the bolt 12 inwardly of the upwardly extending portion 13 and is ahutted by the forward end of the spring 32. A suitable dog 35 is formed on the outer end of the bolt 12 and is adapted to engage with depending lugs 36 on the lower ed ge of the outer frame 8 for holding both frames closed against the rim 6. The

plates27 and 37 are spaced apart to provide a passage for the circulation of a cooling medium as explained hereinafter.

Rotatably secured on the lower end of the cylindricalmember 20 is one end of an elbow connect-ion 3'8. Rotatably secured on the. other end of the connection 38 is a hollow cylindrical member 39 which slidably receives a second hollow cylindrical member 40. The latter is rotatably secured to one end of a second elbow connection 411. The second elbow 11 has rotatably secured thereto at the other end thereof a'cylindrical member 42. The member 42 is rigidly secured to a flange l3. j Y I The device may be'connected to a furnace as shownin Figure 1, the flange 4 being secured to th e'ou'ter wall of'said furnace. The wall of the furnace should be apertured to communicate'with the interior of the casing 1, said aperture diverging from beneath the flange a toward'the interior of the furnace. The flange 43 may be connected to i the side of the furnace. A cooling medium, air, for instance, may be forced up through the flexible connection comprising the members to 42 inclusiveand the member'20 for entering the hollow portion 14 by connecting the cylindrical member 42 to a separate blower, or in case the closed ash pit system of forced draft is used by connecting said member 42 to the ash pit. In'case the closed the room system of forced draft or natural diaft is used, the air may enter the portion 14 through the aperture 19, the plate 16 being light enough to be lifted by the air. From the interior of the portion 14 the air will flow upwardly into the chamber 10, some of it flowing rcarwardly around the outer pei'i liery of the inner casing 21 and over the rear edge of the latter through-the grid 24 into the'furnace. Some of the air which flows rearwardly around the outer periphery of the casing 2l. will flow through the holes 26 into the interior of said casing and thence through the grid 24 to the furnace. A large portion of the air will flow through the aperture 31 to the aperture 29, thence between the

plates

27 and 37 through the aperture 28 and downwardly past the rear sideof the plate 27. From the rear side ofthe plate 27 the last mentioned portion of air. will flow through the grid into the casing 21 and out through the grid 24- to the furnace.

In Fi ures 7 to inclusive there is shown a modihed form of the device. In this form an outer casing 44 of rectangular cross section is provided, said casing having longitudinal integral outwardly extending ribs 44 on the sides thereof. The casing 44 extends into a suitable converging recess 44 in the side of the furnace wall. "An inwardly diverging aperture 45 in the furnace wall communicates with the inner end of the reccss 414. The outer end of the casing 44 is provided with an annular flange 46 having an integral forwardly extending rim 47 on the outer periphery thereof. A rectangularly shaped rim 48 suitably secured to the outer end of the casing 44 within the rim 47 and spaced from the flange 46 by means of a shoulder (not shown) in the latter to form with said flange and said rim 47 an annular recess.

Connected to the bottom side of the flange 46 and the rim 48 and comn'iunicating with the above mentioned annular recess contained therebetween is a removable box 49 containing a valve such as that shown in Figure 6. The valve in the box 49 may con'nnunicate with either {ll separate forced draft means or the atmosphere in the fire room as desired in the same manner as in the previous embodiment.

Rearwardly extending from the rim 48 and integral therewith is a rectangular cross sectioned inner casing 50 having longitudiat the inner end of the casing Forwardly extending lugs are provided at the lower edge of the rim 48 for supporting a shaft 03 on which are pivoted an inner and'an outer door or fran'ic 54 and 55 respectively. The

fran'ies

54 and 55 are provided with

glass plates

54 and 55, respectively, similar to the plates 27 and37 respectively of the previous embodiment. A pair of forward ly extending bolts 56 are oppositely support- .ed at the upper sides of the rim 48 by means of a pair o'l'bapertured laterally extending cars 57 on said rim. "Rearwardly positioned from each car 57 and aligned therewith is an ear'58 secured lo the rim 47. Compression s n'ings 59 surrounding each bolt 56 are compressedbetween the

cars

57 and 58. A washer 60 is mounted on each bolt 56 between the forward end of its respective spring and car A diametrical pin (llextends through the end ofeach bolt and is abutted by the rear end of its respective spring for holdingsaid bolts rcarwardly against said ears 58. Dogs62 on the forward ends of the bolts 56 engage with lateral lugs 63 on the outer frame 55 for holding the same in closed position.

The inner frame 54 is provided in its lower. side with av horizontal transverse aperture 64 and in its upper side provided with a similar aperture 65. The rim48 is provided with a recess 66 adjacent the aperture and has a plurality of apertures or ports 67 0X- tending therethrough communicating with said recess. A transverse rod 68 is supported inwardly of the apertures 67 in a pair of oppositely disposed guide members 69 secured to the inner side of the rim 48 by flanges 70. The guide. members 69 have sloping recesses therein for permitting the rod 68 when released to slide downwardly in said recesses and close the apertures 67; 'A. pair of rearwardlyextending pins 7]. se'curedjto the frame 54 and normally extending through the recesses 66 and. apertures 67 adapted to hold the rod 68 away from said apertures 67 when said frame is in closed position. A removable plate 72 is adapted to close an opening between the forward upper edge of the rim 47 and the upper edge of the rim 48. The on or frame 55 is provided with a horizontal transverse recess 73 adjacent the outer end of the aperture 65 and a similar recess 74 adjacent the outer end of the aperture 64. The rim 47' at the vertical edges thereof is provided with a pair of apertures which are i'iormally closed by means of removable plates 7 5. The air may flow up through the box 49 into the space between the inner and outer casings past rod 68 through the apertures 67, the recess 66, the

aperture 65, the recess 73, downwardly between the glass plates 1n the frame 54 and '55, past the recess 74 through the aperture 64 upwardly past the inner face of the glass plate in sa d frame 54, through the grid 51 .and into the furnace in opposition to the thermal radiation therefrom. If the frames are opened, the pin 71 secured to the frame 54 willflallow the rod 68- to close the apertures: G7 and thus prevent the flow of air through said apertures,'thus protecting any one who might open said frames from a flare of hot air through saidapertures, without.

discontinuing or affecting the iiow of the cooling air thru the supporting casing. In case natural draft s used, the flow of air may be increased by removing the plates 72' and 7 5 and even the box 49 and connections thereto. It will be apparent to those engaged in the operation and construction of furnaces and the like. that I have'provided a device whichmay be. economically manuvention, and I therefore do not purpose limgrids.

iting the patent granted hereon. otherwise than necessitatedhy'the prior art.

I claim as my invention: 7

Lb a device of the class described, a casing, a second casin within said first casiiig, a pair of separately movable transparent doors supported at the outer end of one of said casings for normally closing the same and means foradmitting air to the space between said casings, there being means communicating with said space for circulating air between said doors.

2. In combination, a combustion chamber enclosure having an opening therethrough, heat reducing meansin said opening, and a plurality of separatelymovable observation closures hingedly mounted to normally close the outer end of said means.

3. In a device of the character described, a pair of'spaced casings, and a pair of independently movable closures pivotally mounted on the outer end of one of said casings to normally close. the same.

4. In a device of the character described, tubular means, a plurality of grids graduated with respect to their planar areas spaced in said tubular means, a transparent closure for said tubular 'means, and means for admitting a cooling medium through said grids from passages individual to said 5. An observation device for combustion chamber enclosures including comprising an outer casing, an inner casing spaced from said outer casing, said inner casing having an open inner end, a grid disposed in the outer end of said inner casing, a grid disposed in the inner endof said outer casing, and an observation. closure for one of said casings. '6. In combination, a furnace including a wall having an'opening therein, a tubular spaced member. disposed in said opening, and an observation closures for said member supportedby and, spaced from the inner and means responsive to theopening of said closure for cutting on the communication between said passages.

8. In a device of the class described, a casing, a second-casing disposed within and spaced from said first-mentioned casing to provide an air passage therebetween, an annular outwardly-extending rim on said'sec- 0nd casing, a pair of observation closures hinged to said rim, said closures having a second air passagetherebetween, said rim having apertures therethrough establishing communication between said air passages, a rod in. inclined supports, and means connected to said closures to hold said rod away from said apertures when said closures are closed and to permit said rod to close said apertures when said closures are opened.

'9.*In a device of the class described, a first and outer casing, a second casing partially disposed within said outer casing and spaced therefrom to provide an air passage therebetween, a pair of observation closures hinged to one of said casings adjacent the outerend thereof, said closures being spaced apart toprovide an air passage therebetween in communication with said first-mentioned air passage,resilient' means to maintain said closures in closed position, and means communicating with said passages permitting the use of either natural or forced draft.

10. In combination, a combustion chamber enclosure having an opening therethrough,

a casing communicating with the interior of said chamber through said opening, a second casing in said first mentioned casing and spaced therefrom to provide an air passage therebetween, means for admitting air to said passage, a. pairof substantially transparent closures adjacent the outer end of one of said casings, said closures defining an air space therebetween, said air space being in communication with said passage and means for automatically closing off said communication when said closures are opened.

11. In combination, a combustion chamber enclosure having an opening therethrough, a casing extending into said opening, means for maintaining said casing in spaced relationship to the walls of said opening, means for admitting a cooling medium in the space between said casing and said walls, a pair of movable closures adjacent the outer end of said casing, said closures having a space therebetween for the circulation of a cooling medium, said spaces being in communication with each other, and means cutting ofl said communication when said closures are opened.

12. In combination, a combustion chamber enclosure having an opening therethrough, a casing extending into said opening, means for supporting said casing in spaced relationship to the walls of said opening, a substantially transparent closure for said casing, and means for admitting a cooling medium between said casing and said walls and to said combustion chamberthrough a plurality of paths.

13. In a device of the character described, nested casings in spaced relationship, a plurality of apertured grids in said casings, said grids decreasing in their planar areas in an inward direction, a substantially transparent pair of movable closures for one of said casings having a space th'erebetween in communication with the space between said casings, means fol-admitting a cooling medium into the space between said casings, and means responsive to the opening of said closures for cutting off said cooling 'medi um from the space between said closures.

14. In a device of the character described, a pair of substantially nested casings, the inner casing substantially closing the outer end of the outer casing, and aplurality of independently movable closures pivoted to the outer portion of said inner casing.

15. In a device of the character described, a pair of substantially nested casings spaced apart to provide a passage therebetween, a pair of observation closures hinged to one of said casings for. closing the outer end thereof, said closures having a passage therebetween in communication with said first mentioned passage, and means for admitting a cooling medium into one of said passages.

In testimony whereof I havehereunto subscribed my name.

RAY P. VASTIN E.