US1932243A - Sectional heat resisting metallic surface - Google Patents

Description

Oct. 24, 1933 J. O'F. CLARK 1,932,243

SECTIONAL HEAT RESISTING METALLIC SURFACE Filed April 28. 1932 Patented Oct. 24, 1933 Mar sEc'rioNAL HEAT RESISTING METALLIC SURFACE I John OFallon Clark, University City, Mo., as-

signor to American Manganese Steel Company, Chicago Heights, llL, a corporation of Maine Application April 28, 1932. Serial No. 607,931

3 Claims.

This invention relates to improvements in sectional heat resisting metallic surfaces such as,

causing unequal expansion throughout the area' of the surface;

The nature of the present improvements will "be more readily understood by reference to pa ents of Frank A. Fahrenwald, 1,629,689, 1,643,765, and 1,798,460, which issued, respectively, May 24, 1927, September 27, 1927, and March 31, 1931. The Fahrenwald patents disclose sectional heat resisting metallic surfacesof the same general type'and the manner of using such structures.

The heat resisting surfaces are formed from special heat resisting alloys of suflicient thickness and surface area small enough to prevent warping of the plates. 1

The present improvements are particularly directed to heat resisting surfaces which form substantially vertical barriers and in which the individual metal plates are gravitally supported in sealing relation with respect to each other, as in the Fahrenwald Patents 1,529,689 and 1,643,766, although the features of novelty may haveutility for use in a substantially horizontal heat resisting surface, such as in the Fahrenwald Patent 1,798,460.

It is an object of" the present invention to connect a pair of sectional plates, which together build up the heat resisting surface, by forming the lower edge of an upper plate with a pro jecting ledge and forming the upper edge of a lower plate with a continuous overlap adapted to rest upon the projecting ledge of the upper plate for gravital support of the lower plate.

It is further a feature of the present invention that in associating the plates as above described the plates are sealed againstpassageof gas by a sealing edge at which the plates contact for gravital support with respect to each other and an additional sealing edge due to the gravitally supported plate hanging in such a manner that its upper marginal edge contacts with the lower marginal edge of the supporting plate.

It is further an object of the present invention to provide cooperating lugs upon the respective plates for preventing relative separation, which are so positioned that the plates may be readily assembled or disassembled by a relatively short sliding movement which will move the lugs out of interlocking engagement with respect to each other.

Further objects and advantages of the present improvements will be more readily apparent from the following description taken in connection with the attached drawing, in whic'h Figure 1 is a rear elevation of the sectional plate assembly; r

Figure 2 is a detail section taken on the plane indicated 2--2 in Figure l, and

Figure 3 isa detail section taken on the plane indicated 3'3 in Figure 1.

Figure l is a rear view of a portion of a damper composed of a plurality of sectional plates 10., The front faces 11 of the plates are smooth plane surfaces which together constitute a smooth substantially continuous surface which, in the case of a damper assembly, may be presented to the region of the highest temperature, The respective plates 10 are gravitally supported or suspended in series' Thus in Figure l the middle plate is suspended from the upper plate and the lower plate is suspended from the middle plate,

This gravital suspension of the plurality of plates is obtained in the following described manner. 7

Each of the plates is formed with a continuous ledge 12 projecting from the rear face 13 of the plate. The upper face 14 of the ledge 12 is slightly inclined downwardly towards the front face 11 of the plate. The lower marginal edge of the plate 10 is formed to present an inclined surface 15 substantially parallel to the inclined surface 14 of the ledge 12. It will be noted that the surfaces 14 and 15 are offset, both vertically and horizontally, with respect toeach other.

Each of the plates 10 is formed at its upper edge with a hook-shaped portion or overhang 16 which may, as shown, be continuous throughout the entire length of the plate. The overhang 16 is adapted to overlap the projection 12 upon the lower edge of the plate thereabove and it will be noted that the lower face of the extremity 17 of the overhang 16 is adapted to, rest upon and contact in sealing engagement with the top face 14 of the projection 12. Since the center of gravity of the plate 10, which is gravitally supported by its hook-shaped portion 16, is offset with respect to the contact at the face 14 of the projection 12,

there will be a tendency for the supported plate plate. The overhang 16 is separated from contact with the projection 12 between the sealing contacts 14 and 15 as at 19 to permit expansion.

In order to hold the plates against accidental separation a plurality of spaced lugs 20 are provided on the continuous overhang 16, which are adapted to interlock with a plurality of depending lugs 21 on the rear face of the supporting plate. It will be noted that the lugs 20 and 21 will interlock to prevent separation of the plates in a direction at an angle to the plates. Since the lugs 20 and 21 are arrangedat spaced points with respect to the length of the plates, it will be noted that it is only necessary to slide one of the plates with respect to its connected plate in order to bring the lugs 20 and 21 out of line and permit separation of the plates. The assembly of the plates is the reverse of the separation thereof, as will be readily understood.

The advantage of this arrangement is that it is unnecessary to slide one plate the entire length of a connected plate as is required in some previousconstructions. If the plates are very large it is difiicult to assemble the plates when it is necessary that each plate must be slid the entire length of a connected plate.

I have also disclosed means for holding the plates against relative longitudinal sliding movement. A socket 22 is formed in the hook-shaped portion 16 and a vertical key 24 is adapted to fit in the socket. 22. The key 24 is positioned be tween a pair of lugs 26 on the supporting plate and may be welded theretoas shown at 28.

I claim:

l. A sectional heat resisting metallic barrier composed of a plurality of plate sections assembled in a substantially common plane, each of said plates being formed with an over-hang portion at its upper edge for suspension of the plate and a ledge at its lower edge for gravitally supporting the plate therebelow through cooperation with the over-hang portion thereof, a plurality of spaced lugs on each of the plates, said plates being assembled by relative sliding movement to bring said lugs into cooperating relationship to prevent separation of the plates in a direction at an angle to the plane of the plates and means for holding the plates against-relative sliding movement to prevent longitudinal separation thereof. V

2. A. heat resisting metallic barrier composed of a plurality of plate sections suspended in series arrangement, said plates presenting a substantially smooth continuous surface on one side, a continuous supporting ledge adjacent the bottom edge of each of said plates, a continuous overhang portion along theupper edge of each of said plates adapted to fit over and rest upon the supporting ledge of a plate thereabove, said plates being brought into sealing contact at their meeting marginal edges due to the suspended weight of the plates and cooperating lugs on adjacent plates for preventing separation of the plates in a direction at an angle to the plane of the plates.

3. A sectional heat resisting metallic barrier composed of a series of suspended plate sections,

a continuous supporting ledge extending along loo above for gravital suspension thereon, the adja cent marginal edges of the plates forming contact faces parallel with the contact face on the sup porting ledge, said plates being brought into sealing contact at the marginal edges through the JOHN OFALLON CLARK.

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