US1168852A - Grate for gas-ranges. - Google Patents

Description

R. B. CAVERLY.

GRATE FOR GAS RANGES.

APPLICATION FILED JULY 20, I915.

1,168,852. Patented Jan.18, 191s.

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ATTORNEY 7 THE COLUMPIA PLANOGRAPH co., WASHINGTON, D. c

UNITED STATES PATENT UFFIFL ROBERT B. GAVERLY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HALE AND KILBURN COMPANY,, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF DELAWARE.

GRATE FOR GAS-RANGES.

Specification of Letters Patent.

Application filed-Tilly 20, 1915. Serial No. 40,816.

To all whom it may concern:

Be it known that I, ROBERT B. CAVERLY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphla and State of Pennsylvania, have invented certain new and useful Improvements in Grates for Gas-Ranges, of which the following is a specification.

My invention relates to top grates for gas ranges, and particularly to a top grate having a bafiie plate adapted to extend downwardly inside the opening in the top frame of the gas range or stove, the grate resting on its outer edge portion on the top frame adjacent to this opening. By means of the bailles referred to, the edges of the opening in the top frame are protected from the heat rising from the burners, the heat thereby being concentrated at the burner openings of the grate with a resultant coo-ling of the top frame of the range. By this means, the economy of the operation of the range is materially increased, while at the same time the top frame of the range or stove is prevented from becoming excessively hot, because of which fact I am enabled to provide the top frame with a flat enamel finish, which would be ruined if the top frame were permitted to become as hot as it would if my improve ments were not used. I preferably use the baffle plates referred to in connection w1th a pressed metal top grate which consists of a pressed metal structure formed of a single sheet with downturned flanges around the outside edges, one or more openlngs, preferably star-shaped, and a plurality of stiffening flanges or corrugations which extend across the surface of the grate. These corrugations are so placed upon the plate as to give stiffness to the structure, so that the same will not warp under severe heat tests, as well as securing other advantages. The grate rests upon its downturned edge flanges upon the surface of the top frame, the area of contact between the grate and the top frame being small. The baffies referred to preferably comprise angular strips secured to the under side of the grate having flanges extending downwardly, as stated, ad acent to but out of contact with the inner edges of the top frame. Preferably, a pair of grates are used together, mounted over the opening in the top frame with their inner edges abutting, each grate having baiiie plates'secured adjacent to the three outside edges thereof so that the baflie extends entirely around the pair of grates.

In order that a clearer understanding of my invention may be had, attention is hereby directed to the accompanying drawings forming part of this specification and illustrating certain embodiments of my invention.

In the drawings, Figure 1 represents a plan View of a pair of grates mounted together, Fig. 2 is a vertical section taken on line 22 of Fig. 1, showing also the adjacent portions of the top frame of the range upon which the grate is mounted, Fig. 3 is a vertical section on line 33 of Fig. 1, and Fig. 4 is a partial bottom plan view of one end of one of the grates.

Referring to the drawings, the grates 1 and 1 are each formed, as stated, of a single sheet of pressed metal, the edges of each plate being flanged downwardly all the way around. The flanges at the outer sides and ends of each grate 2, 8 and 2, 3, respectively, may be made of the same height, while the flanges at the abutting inner edges 4 and 4 may be made of greater depth. Each grate is provided with a plurality of openings, such as the star point openings 5, 5, and the simmer openings 6, 6, the metal of the grate being flanged downwardly Patented Jan. 18, 1916. i

around the lower edges of each opening, the

metal of each grate also being pressed into a plurality of stiffening corrugations, such as is shown at 7, 7.

The top frame of the stove may suitably comprise a horizontal surface 8, as shown in Fig. 2, having an offset portion 9 on which the grates are adapted to rest, and a vertical flange 10 extending downward around the inside. This construction of top frame is, of course, not essential for my invention, the top frame with which I prefer to use my grate being, however, preferably a pressed metal structure of the character referredto.

The grates are mounted in position with their edge flanges 2, 3, 2, 3 resting on the offset portion 9 of the top frame. The baffles comprise strips 11, 12, 11, 12 secured to the under sides of the grates adjacent the ends and the outer side edges respectively. The horizontal flanges of these baffle plates are secured by any suitable manner, such as welding, to the under sides of the grates adjacent to the edge flanges thereof, and have downwardly extending flanges 13, 13

at their inner edges. These flanges 18,13 extend downwardly inside the inner flanges 10 of the top frame, but out of contact therewith. The height of the edge flanges :2, 2, 3, 3 of the grates is greater than the thickness of metal comprising the horizontal portions of baffles 11, 12, 11, 12,so that the grates have contact'with the top frame only along the edges of their contacting flanges 2, 3, 2 and 3, whereby the area of contacting surface through which heat may pass by conduction is reduced to a minimum.

Because of the provision of the baffles, as described, the inner edges of the top frame are protected from heating, the heat from the burners underneath the grates being concentrated at the openings in the grates. Because of'this the topframe of the range is maintained at a much lower temperature than isusual in gas ranges, and the concentration of heatat the burner openings is'such as to result in most economical operation. The baffle plates are preferably applied in the manner shown in Fig. 4, in which the strips 11, 12 are shown as spot Welded at 11,

" 12 to the under side of the grate with their downturned flanges 13, 13 abutting at the corners.

Having described my invention, what I claim as new therein and desire to secure by Letters Patent is:

1. The combination with a top frame of a range adapted to be given a flat enamel finish and having an opening therethrough, of a grate mounted across the opening, comprising'a single sheet of pressed metal having openings therethrough, downturned edge flanges resting on said top frame adjacent the opening therein to form the support for the grate, and having baffle plates secured to its under surface, said baffle plates having said edges and from said downturned edge flanges, substantially as set forth. 7

2. The combination with a top frame of a range having an opening therethrough, of a pair of grates mounted across the opening side by side with abutting inner edges, said grates having openings therethrough, downturned outside edge flanges resting on said top frame to form the supports for the grates and having baffle plates extending downwardly from their under surfaces parallel to but spaced from the edge flangeson the three outer sides of each, to form a complete baffle around the two grates, said baflie plates extending into the top frame opening adjacent to but spaced from the edges thereof, substantially as set forth.

3. A top grate for gas ranges formed of a sheet of metal having openings therethrough and pressed to shape with its edges turned down to form supports for the grate, adapted to rest on a top frame of a range adjacent to the opening therein, and flanged baflie plates secured to, the under side of the grate parallel to three edges thereof, said baffle plates having downwardly extending flanges joining at the corners, spaced suffi ciently from the downturned edges to permit the same to extend into the opening in the top frame adjacent to the corresponding edges thereof, substantially as set forth.

This specification signed and witnessed this 16th day of July, 1915.

ROBERT B. GAVERLY;

Witnesses:

MARGARET T. PEEPELS, WM. J. EARNSI-IAW.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. I i

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