US1412717A - Brick for fireless cookers - Google Patents
Brick for fireless cookers Download PDFInfo
- Publication number
- US1412717A US1412717A US457669A US45766921A US1412717A US 1412717 A US1412717 A US 1412717A US 457669 A US457669 A US 457669A US 45766921 A US45766921 A US 45766921A US 1412717 A US1412717 A US 1412717A
- Authority
- US
- United States
- Prior art keywords
- brick
- fireless
- cookers
- heat
- fireless cookers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
Definitions
- the object of my invention is the production of a brick which shall overcome this objection and. will, therefore, continue to supply heat of a high temperature throu hout a period much in excess of what as previously been the case.
- phenanthrene a hydrocarbon whose chemical formula is C H and which is graphically represented as fol ows:
- the boiling point of this phenanthrene is found to be approximately 330 C., and consequently at too high a temperature to be reached by a gas stove such as is used for heating fireless cooker bricks. It is in no danger, therefore, of vaporizing and causing loss of its own substance, or of exploding the container.
- FIG. 1 is a plan view of brick embodying my in vention
- Fig. 2 is aside sectional view of the same.
- the jacket 1 is illustrated as circular to conform to the fireless. cookers now on the market, and is preferably composed of aluminum because of its lightness and noncorrosive nature, and more especially because of its high specific heat. To ensure the free conductivity of heat from the -material 4; to the exterior of the container 1,
- the jacket 1 and its ribs 5 may be cast complete with a cover 6, an opening 2 closed. by a screw plug 3 being provided for the removal of the core used in the casting, and for pouring the material 4: therein.
- the phenanthrene as it comes from the dye-works is a mass of flakes, but, by first heating it to its melting point, it can be poured into the jacket until full, and then the plug 3 screwed firmly in place.
- a brick for fireless cookers and the like 1
Description
E. Z. STOWELL.
BRICK FOR FIRELESS COOKERS.
APPLICATION FILED APR.1,1921- 1,412,717. Patented A r; 11, 1922,
2 s E 1 1 s 1 l Li Fig.2 5 1 Fig.1
[five min,
Elbriqge Z. S fiweU UNITED STATES PATENT OFFICE.
ELBBIDGE Z. STOWELL. 0F TUFTS COLLEGE, MASSACHUSETTS, ASSIGNOR 0 F TWO- FIFTHS TO WILLIAM F. MAGCORMACK, OF MALDEN, MASSACHUSETTS.
BRICK FOR FIRELESS COOKER/S.
Application filed April 1,
To all whom it may coacem:
Be it known that I, Ennmncn Z. STOWELL, a citizen of the United States, and a resident of Tufts College, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Bricks for Fireless Cookers, of which the following is a full, clear, and exact specification.
In fireless cookers, as is well known, the heat for the baking and stewing is received from a hot object usually designated as a brick but in reality a block of soapstone, introduced within the non-conducting box. The main trouble found in connection with such blocks is their failure to give out heat at a sufiiciently high temperature and for a suflicientl long time to properly cook many kinds of cod.
The object of my invention is the production of a brick which shall overcome this objection and. will, therefore, continue to supply heat of a high temperature throu hout a period much in excess of what as previously been the case.
In accomplishing this, I take advantage. of the latent heat evolved during the change of a fluid to a solid, and thereby add materially to the heat emitted by the simple cooling of the body. The difficulty. however, is the discover of a substance which changes from solid to liquid at a temperature proper for cooking, but does not, on the other hand, vaporize at a temperature so low as to render such a process possible during the heating of the brick; for did such vaporizing occur, either the material would escape, or the receptacle be burst th ereby. Further, it must not decompose by frequent use, and, finally, it must not to be too expensive for" family After considerable study and experiment, I have discovered that a certain waste product resulting from the production of aniline dyes from coal-tar, termed phenanthrene, a hydrocarbon whose chemical formula is C H and which is graphically represented as fol ows:
1 l The melting point of this by-product is Specification of Letters Patent. Patented Apr. 11, 1922.
1921. Serial No. 457,669.
approximately 120 C., or about 248F., and consequently a good cooking temperature, so that after it has cooled down enough .to solidfy, it givesout a large amount of heat during the process. Further, this latent heat is far in excess of most other substances which might in some ways be available, and hence the material is ideal in this direction also.
The boiling point of this phenanthrene, moreover, is found to be approximately 330 C., and consequently at too high a temperature to be reached by a gas stove such as is used for heating fireless cooker bricks. It is in no danger, therefore, of vaporizing and causing loss of its own substance, or of exploding the container.
Inasmuch as this by-product possesses no other known value, but is a waste in the manufacture of certain aniline dyes, its cost is almost-nothing.
I have further found that continued heating and cooling of this phenanthrene fails to decompose it or otherwise render it unfit to perform its required function.
Since it liquefies at a comparatively low temperature-or only 36 F. above the boiling point of water,-it is necessary to confine it in a'fluid-tight jacket, as set forth in the accompanying drawings. in whichFig. 1 is a plan view of brick embodying my in vention, and Fig. 2 is aside sectional view of the same.
The jacket 1 is illustrated as circular to conform to the fireless. cookers now on the market, and is preferably composed of aluminum because of its lightness and noncorrosive nature, and more especially because of its high specific heat. To ensure the free conductivity of heat from the -material 4; to the exterior of the container 1,
The jacket 1 and its ribs 5 may be cast complete with a cover 6, an opening 2 closed. by a screw plug 3 being provided for the removal of the core used in the casting, and for pouring the material 4: therein.
The phenanthrene as it comes from the dye-works is a mass of flakes, but, by first heating it to its melting point, it can be poured into the jacket until full, and then the plug 3 screwed firmly in place.
What I claim is:
A brick for fireless cookers and the like, 1
comprising 'a jacket containing phenanthrene.
Intestimony that I claim the foregoing invention I have hereunto set my hand this 29th day of March, 1921.
ELBRIDGE Z. STOWELL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US457669A US1412717A (en) | 1921-04-01 | 1921-04-01 | Brick for fireless cookers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US457669A US1412717A (en) | 1921-04-01 | 1921-04-01 | Brick for fireless cookers |
Publications (1)
Publication Number | Publication Date |
---|---|
US1412717A true US1412717A (en) | 1922-04-11 |
Family
ID=23817668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US457669A Expired - Lifetime US1412717A (en) | 1921-04-01 | 1921-04-01 | Brick for fireless cookers |
Country Status (1)
Country | Link |
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US (1) | US1412717A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2640478A (en) * | 1948-11-23 | 1953-06-02 | Margaret Thurston Flournoy | Heat storing cooking utensil |
US2690743A (en) * | 1947-08-09 | 1954-10-05 | Margaret Thurston Flournoy | Heat storing serving dish |
US2808494A (en) * | 1952-04-22 | 1957-10-01 | Telkes Maria | Apparatus for storing and releasing heat |
US3019783A (en) * | 1957-10-14 | 1962-02-06 | Mealpack Corp | Covered dish and tray combination |
US3148676A (en) * | 1962-12-10 | 1964-09-15 | Crimsco Inc | Unit for maintaining food at a constant temperature |
US3320408A (en) * | 1964-05-04 | 1967-05-16 | Hooker Chemical Corp | Heat storage apparatus |
US4215670A (en) * | 1978-06-30 | 1980-08-05 | Sunergy Corporation | Cooking grate |
US4398593A (en) * | 1980-09-15 | 1983-08-16 | James E. Harrell | Heater plate assembly |
US20070246037A1 (en) * | 2004-04-30 | 2007-10-25 | Cantu Homaro R | Cooking and serving system and methods |
-
1921
- 1921-04-01 US US457669A patent/US1412717A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2690743A (en) * | 1947-08-09 | 1954-10-05 | Margaret Thurston Flournoy | Heat storing serving dish |
US2640478A (en) * | 1948-11-23 | 1953-06-02 | Margaret Thurston Flournoy | Heat storing cooking utensil |
US2808494A (en) * | 1952-04-22 | 1957-10-01 | Telkes Maria | Apparatus for storing and releasing heat |
US3019783A (en) * | 1957-10-14 | 1962-02-06 | Mealpack Corp | Covered dish and tray combination |
US3148676A (en) * | 1962-12-10 | 1964-09-15 | Crimsco Inc | Unit for maintaining food at a constant temperature |
US3320408A (en) * | 1964-05-04 | 1967-05-16 | Hooker Chemical Corp | Heat storage apparatus |
US4215670A (en) * | 1978-06-30 | 1980-08-05 | Sunergy Corporation | Cooking grate |
US4398593A (en) * | 1980-09-15 | 1983-08-16 | James E. Harrell | Heater plate assembly |
US20070246037A1 (en) * | 2004-04-30 | 2007-10-25 | Cantu Homaro R | Cooking and serving system and methods |
US7690294B2 (en) | 2004-04-30 | 2010-04-06 | Cantu Homaro R | Cooking and serving system and methods |
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