US1001627A - Art of cooking. - Google Patents

Description

A. c. Mmmm.

'ABT or COOKING.

APPLICATION FILED APBM, 1911.

Patentad Aug.29,1911.

AUSTIN C. DUNHAM, OF EARTEOFD, CONNECTECUT.

ART .GF CUGKNG.

Specification of Letters Patent.

)Patented ning. 2Q, 19ML.

Application filed April 14, 1911.. Serial No. 621,088.

To all whom 'it may concern:

y Be it known that l, AUSTIN C. lDUNHAM, I

- current for light and power purposes can, profitably to itself, furnish means for cooking food at such `very low rate as to bring its cost within the reach of people in modest nancial circumstances.

i. To accomplish this object the cost of the apparatus, the cost of installing it, and, more especially, the cost of the operating current, must be so lo-W that it will meet the competition of apparatus utilizing coal, oil or gas as fuel, otherwise it will not be Within the reach of the consumer oflim-ited means. ln order to effect this lat a prolit `to the produc-ing company, .the apparatus must be simple to manufacture, and the conditions of use must be such that the current can be supplied Without necessitating an increase of the generating and distributing equipment of the central station. It is well known that a central station must have hpparatus sufficient to sup-ply current to meet the maximum demand or'the peak of the load.7 The peak4 of the load .comes at various times under different conditions, for instance, in a system devoted solely 4to lighting, the load is heaviest during the evening hours. The remainder of the twenty-four hours of the day the load is light. ln a power plant the peak occurs during the working hours of the day, while with a plant furnishing-current for both light and power the peak is reachedduring' the short period when motors and lamps are both being used at the same time. A compa-ny can supply current profitably, at a low rate to `the consumer, if the demand is uniform and is extended throughout the twenty-four hours of the day, for this raises the .so-called average load line or tends toward the theoretical condition of economy, which is what is known as the hundred per cent. load factor striven for by central stations. ln other words, if .a demand is spread over twenty-four hours, the increased income derived from the many hours of lowdemand more than makes up for `the additional cost of the increase at the short time of the peak.

Certain degrees of heat are desirable to satisfactorily cook food.. lit is a self eVident fact that if the required degree of temperature is once obtained, it is only nec-essary to supply the heat lost by absorption and radiation in order" to maintain that tem-- perature. duced to practically nothing, the amount of energy necessary to maintain a specific degree of temperature once obtained will be very small. Consequently, in carrying out this invention a simple oven chamber is constructed in such manner that, at the desired internal cooking temperature, the loss of heat by radiation is very slight, in fact practically nothing. rlhis chamber is provided with simple mea-ns which merely supplies enough heat to compensate for 'the loss due to external radiation and the absorption by the food to be cooked. This slight amount of heat necessary to keep the temperature uniform is developed by a small quantity of electric current, but in order to accomplish this result with the low current factor, the current is supplied continuously for twenty-four hours, thus keeping the temperature uniform and eliminating the lf the loss by radiation is re-y necessity of extra amounts of current that A would be necessary if the chamber were allowed to cool .olf and which probably would be Wanted at the time of heaviest demand on the system. This equalizes the load on the operating plant, and it is only in this manner that the central station company, with profit to itself, can furnish current for cooking at sufficiently low rates to bring it within the purchasing power of consumers of limited means.

This invention has been developed to meet the requirements of a central station, and

the a paratus illustrated in the accompanying rau/ings has been used foi-'some time for bakin roasting and boiling foods'V in order to demonstrate the practicability of this invention.

Figure 1 shows a front elevation of such an ap aratus. Fin. 2 shows a vertical section o the same. llig. 3 shows a horizontal section. Fig. e shows a plan on larger form current of electricity of less'than 150 be treated in, and silibjecting them to the Watts.. z

`G. The method of constantly maintaining has heet non-conducting walls and which is the interior of it heat insulated cooking provided with an electrical heating resistchanber at a .uniform erii'cient cooking temance of small capacity through which there peinture, which consistsindeveloping heat is a continuous flow of electricl current of therein by continuously-v passing there- 10W Wattage. through anniform electric currentof 10W AUSTIN C. DUNHAM. Wattage. 1

7. The treatment of foodv substances which consists in placing the substances t0 Witnesses:

RALPH D. CUTLER, H. R-` WILLIAMS.

Copies of thispatent may be ebtained for lfive `cents each, by addressing the Commissioner of Patents,

. i Washington, D. G.

uniform temperature of, :i chamber which.

Images