US1060841A - Baker's oven and the like. - Google Patents

Description

G. F. HUMPHREY. BAKERS OVEN AND THE LIKE. APPLIOATION FILED JAN. 2, 1913.

. 1 0 0 41 Patented May 6, 1913.

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WITNESSES: [NVENTQR Y G. F. HUMPHREY.

. BAKERS OVEN AND THE LIKE.

APPLICATION FILED JAN. 2, 1913.

1,060,841. Patented May 6,1913.

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COLUMBIA PLANDURAPH 60., WASHINGTON. 'D'. c.

UNITED STATES I ATENT FFC.

GEORGE FREDERICK HUMPHREY, OF LONDON, ENGLAND.

BAKER/S OVEN AND THE LIKE.

Specification of Letters Patent.

PatentedMay 6, 1913.

Application filed January 2, 1913. Serial No. 739,725.

ments in Bakers Ovens and the Like, of

which the following is a specification.

It has heretofore been set forth in patents that flowing steam or other gaseous fluids, hereinafter designated steam, for convenience, may be superheated without material increase in pressure but with increased velocity of motion or by allowing suitable increase in volume, or both, and this broad idea has been utilized in ovens, rapidly moving low pressure steam being superheated, to increase its velocity, then reduced in velocity in a radiator, of larger cross-sectional area, where it gives up heat, and then discharged.

The present invention involves using a plurality of radiators through which the same heating fluid passes in succession being superheated after passing each radiator, to restore the heat which it has lost. It is found that by properly proportioning the different portions of the conduit no material back pressure is produced by such superheating, and an important saving in fuel results, while by the use of proper adjuncts steadiness of any desired heat and perfection of cont-r01 are attained.

In the accompanying drawings, Figure 1 is a diagrammatic elevation of a plant having double deck ovens with top and bottom heating elements, or radiators, in each oven. Fig. 2 is a diagrammatic plan of the plant of Fig. 1, the radiators, for clearness, being arranged around the superheaters. Figs. 3 and 4e are sectional elevations the sections being in planes perpendicular to each other.

In these figures, (1 represents a boiler or other source of supply for low pressure steam which passes through a pipe 6, e, a header 5, superheater coils 0 located in a casing b, a header d and pipe f to a header 9, coils in and header 2" of a radiator, designated as a whole by I. From the header i a pipe e leads to a second superheater similar to the first and consisting of a header b coils c and header d From this latter header the steam passes by a pipe f to a second radiator II, like the first, and then to the header 6 of a third superheater, and so on, four radiators, I, II, III, IV, being shown, although moreor less may be used.

From the last radiator the steam is discharged through a pipe 6 The superheater coils c, 0 etc., are separately heated from a space 5 by gaseous or other heating agent. The delivery pipes from the superheaters are provided with valves 6 permitting steam to be blown ofl while the corresponding superheater is being brought up to working condition, and by common devices, not shown, any radiator or pair of radiators may be cut out when desired; and the temperature of the ovens may be regulated, within somewhat Wide limits, by throttling the steam passing therefrom.

The temperature of the steam in different parts of its path is not the same yet its pressure varies but little and back pressure is practically avoided, a peculiar result essential to the proper operation of the series arrangement and one not ordinarily thought obtainable. In practical use of the apparatus I have secured a great saving of fuel over ordinary oven arrangement and over apalogous devices with the radiators in para lel.

It is evident that since the steam supplied to all the superheaters after the first is at a higher temperature than when it is delivered to the first superheater by the boiler, less heat is required for these heaters than for the first. It has been found that in order to secure the proper velocities and temperatures at all points the proportions of the cross-sectional areas may be 1 for the pipe 6, 9 for the headers and coils Z), d, h, for the coils c, 4 for the pipe f, and 2 for the pipe 6 What I claim is:

1. The combination with an oven provided with a plurality of fluid heated radiators arranged in series of independent means for superheating the fluid between successive radiators.

2. In oven construction, the combination with two radiators located in the baking space and adapted to be heated by fluid flowing through them, of two fluid superheaters without said space and having their cross-sectional fluid-passage areas materially less than those of said radiators, a conduit from the first superheater to the first radiator, a conduit leading from the first radiator to the second superheater, a conduit leading from the second superheater to the second radiator, and a conduit leadsages of less cross-sectional area than the 10 ing from the second radiator out of said passages of the radiators.

space. In testimony whereof I have signed my 3. The combination with a plurality of name to this specification in the presence of ovens provided with internal radiators, of two subscribing witnesses.

conduits connecting all the radiators in sei GEORGE FREDERMJK HUMPHREY. ties with a source of low pressure steam, and Witnesses:

super-heaters interposed in said conduits be- SAMUEL JOHN CLARKE,

tween successive ovens and having fluid pas- EDWARD ALLBRIGHT ROBINSON.

Copies of this patent may be obtained for five cents each, by addressing the "Gommissioner of Patents, Washington, D. G.

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