US2365933A - Grate bar - Google Patents

Description

Dec. 26, 1944. A; E, BI DER 2,3 5,933

GRATE BAR Filed May'lS, 1942 Patented Dec. 26, 1944 v UNITED STATES PATENT OFFICE GRATE BAR Adolph E. Binder, Spokane, Wash.

Application May 13, 1942, Serial No. 442,803

1 Claim. ((31. 126-168) This invention relates to grate bars and constitutes an improvement over the construction disclosed in my prior Patent No. 2,008,660, issued July 16, 1935.

The invention consists briefly of a bar or frame carrying grate sections which are removably supported upon the bar and it is One object of the invention to so form the grate sections that when they expand and contract they will remain in their proper positions upon the bar and not force each other out of place upon the bar.

Another object of the invention is to provide the grate sections with confgonting end faces having beveled upper edges which will prevent a scraper from becoming caught between the grate sections during use of the scraper.

- Another object of the invention is to provide a grate bar of the improved construction which is so constructed that the grate sections may be easily applied or removed but will not be liable to accidentally slip out of place upon the bar or frame.

The invention is illustrated in the accompanying drawing, wherein:

Fig, 1 is a top plan view of the improved grate bar.

Fig. 2 is a perspective view of theimproved grate bar with some of the grate sections removed.

Fig. 3 is a sectional view taken transversely through the grate bar on the 1ine 33 of Fig. 2.

Fig. 4 is a view showing an end portion of the improved grate bar partially in section and partially in side elevation.

This improved grate bar has a frame I consisting of side walls 2 and end walls 3, bracing webs 4 being provided between th side walls in longitudinally spaced relation to each other. The end walls are formed with recesses 5 leading from their lower ends to receive lugs 6 extending from hanger brackets I and' provided with heads 8 at their outer ends to prevent the grate bars from slipping out ofengagement with the lugs. The brackets rest on the sill or sills 9 of a stove or furnace and it is to be understood that the grate bar illustrated is only one of a number forming a complete grate. While lower edges of the side walls 2 have been shown arcuate longitudinally and curved downwardly, it is to be understood that the specific outline of the lower edge of the side bars may be changed as desired.

Upper edges of the side bars are formed with depressions or recesses 10 and projections ll between the recesses, upper ends of the projections of the side bars l5 of the grated members between which'extend the cross bars I 6 and it should be noted that the cross bars extend diagonally between the side bars with their end portions projecting from outer sides of th side bars. End portions of the grate members rest upon the fiat upper faces I2 of the projections ll of the frame with the projection I3 fitting within the recesses l0 and dimensions of the extensions and the recesses are such that edges of the extensions are spaced from margins of the recesses to provide spaces l1 through which air may pass. Outer ends of the grate members I 4 are cut straight across parallel to confronting faces of the brackets I but inner ends of these grate members and confronting ends of an intermediate grate member have the portions l8 of their ends between the side bars I5 extending diagonally with extremities of their end faces disposed at right angles to the side bars. Therefore, when the grate members are expanded by action of heat and make contact with each other, the portions I9 of their end faces extending at right angles to the side bars I 5 willhave flat face to face engagement with each other and thrust will be longitudinally of the grate sections parallel to the side bars. Therefore, cam action which might be created by engagement of the-diagonally extending portions of the grate sections engaging each other will be overcome and thegrate sections will be prevented from becomingwedged in the grate bar i. It will thus be seen that the grate members may shrink and return to their normal positions as they cool. By forming ends of the grate sections with beveled upper edges 20 a scraper will b prevented from catching between ends of the grate members. While the grate bar has been shown provided with one intermediate grate member, it is to be understood that additional intermediate grate members may be provided if found desirable in large grate bars.

Having thus described the invention, what is claimed is:

In a grate bar, a frame having side walls spaced from each-other transversely of the frame and having flat horizontally extending upper edge faces and V-shaped recesses between said upper edge faces, and grate members removably supported upon the upper edge faces of the side walls in end to end relation to each other and depending V-shaped webs fitting into said recesses, said grate members having confronting end faces each formed with a diagonally extending intermediate portion and straight end portions disposed at right angles to the length of the frame to prevent shifting of the grate members transversely of the frame by cam action of the diagonal intermediate portions of the end faces when the grate members are expanded by heat,

ADOLPH E. BINDER.

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