US1152803A

US1152803A - Bake-oven.

Info

Publication number: US1152803A
Application number: US84388314A
Authority: US
Inventors: August Finnila
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-06-08
Filing date: 1914-06-08
Publication date: 1915-09-07
Anticipated expiration: 1932-09-07

Description

A. FINNILA.

BAKEovEN,

AFPLICTlON FILED JUNE 8.1914- l,12,803 PatentedSept. 7, 1915.

3 SHEETS-SHEET l.

CIS 1 A. FINNILA.

BAKE OVEN.

APPLICATION FILED JUNE 8.1\9I4.

1,152,803. PaIenIedsepI. 7, 1915.

3 SHEETS-SHEET 2.

z2 5 7 UJI/Wwe@ '36 COLUMBIA PLANoGRAPH co. WASHINGTON. D. c.

A. FINNILA.

BAKE OVEN.

APPLxcAnoN FILED JUNE 8.1914.

Patented Sept. 7', 1915.

3 SHEETS-SHEET 3.

iss

rear ends of ysaid tubes, in consequence of which, the temperature of said gases is higher at said rear ends than it is at the frontv ends where the gases pass from said tubes after having parted with some oftheir heat. 1t is noted that the tubes 15 are arranged in two separate banks or series, a right series and a left series, each series being independent of the other by reason of a partition 19 that may be an arch forming the roof of the `lire box 6. The floor of the baking chamber 16 not only thickens rearwardly as clearly k shown in Figs. 3 and 5 but also thickens at the front from the center toward the sidesV as clearly shown in Fig. 2 and for this purpose the front ends of the tubes arey deflected downward increasingly from the center toward the sides, the floor slabs 17 being horizontal from the centerl to the sides, so that there will be no tendency to over heatingofgthe floor slabs at the front corners. Thebaking'chamber 16 opens at its front end through the front wall 1 and is there provided with a counterbalanced door 20. lProvision. is made for supplying steam to the baking chamber 16 and for this purpose a steam pipe 21 led from a suitable source of supply, not shown, passes through the front wall 1 into the front end of the baking chamber 16 and said pipe is provided with a suitable valve 22. By this construction the air in the baking chamber 16 may be moistened to produce any desired percentage of humidity for producing superior baked foods.

The top of the baking chamber 16 is constructed of longitudinally arranged parallel open ended flues or tubes 23,'preferably arv ranged from side to side in the form of an arch and said tubes may be formed of re tile or the like placed end to end. The tubes 23 are not all of the same length but increase in length from the sides toward the center and the rear ends of said tubes are flush with one another so that the front ends of the more central tubes are stepped forward beyond the front ends of the tubes nearer the sides. rlfhe forward ends of the tubes 23 are spaced apart from the front wall 1 to form lupper transversely extending front flues 2-1 which are separated one from the other Vby a partition 25 that ex- `tends from the front wall 1 to the rear wall 2 and that thus separates said tubesv into two banks or series, a left series and a right series.

The front walls of the upper front flues `24 are aslant forwardly from the sidesY tosented by the stepping of the tubes 23 so that the front ends of those of the tubes that are nearer the sides are spaced farther away from said'front walls than the front ends of they more central tubes, thus diminishing the inlets into said tubes from the sides toward the center so that the tubes nearer the sides will receive more heat than the tubes nearer the center, thus tending, as I have discovered, to equable heating of the baking chamber. The upper front fiues 24 open into vertical flues 26, one in each front front of the forward ends' of those bottom tubes 15 that are nearer the sides, and all of said bottom tubes being spaced apart from they front wall 1 sufficiently to form lower transversely extending front flues 27. lThe rear ends of the top lues 23 are 'spaced apart from the rear wall 2 to form upper transversely extending rear flues 28 which open into a chimney 29. The top tubes 23 are spaced apart from the top t of the oven,

the front corners is thickened.E from thek center toward the sides so also is the front wall 1 adjacent the baking chamber thickened considera-bly from the center toward the sides, as clearly shownby dotted construction lines 32 in Fig. 4t, for the purpose of obtaining even conduction of heat by said partition from the hot gases inthe lues 26. Along both sides of the lire box 6 beneath the bottom lues 15 are provided heat-insulations in the form of sand-beds 33.l The chimney 29 is provided with a damper 34 operated from the front by a damper rod 35.

Provision is made for rapidly lowering the temperature of the baking chamber 16 and for this purpose the baking chamber is provided with air vents 36 opening at their forward ends at both sides near the front end of saidl chamber, and extending upward at the sides of the chimney 29 to the top thereof so as to Provide a strong draft tending to draw hot air out of the baking chamber. The vents 36 arev provided with dampers 37 which are operated from the front by damper rods 38.

corner, vsaid flues extending downward in' They fire box 6 is provided at its rear end with a vertically extending V-shaped de-` flector 39 projecting from the rear wall 2 in the median line of said lire box so as to divide o the gases of combustion and cause them to flow in equal quantities to the right and left into the lower rear lues 18. WhenV it is desired to use the bake oven, the

doors

10, 11 will be opened and the burner 12 will be swung into the position shown in Fig. 1, and the fuel supplied by said burner will be lighted and the outer door 11 will then be closed. vThen when the oven has reached the `desired baking temperature which may be indicated by the thermometer 10, Vthe articles to be baked will be placed in the baking chamber 16.

The air passing into the fire box 6 through the grill 9 will be heated by the burning gases and together with the gases of combustion will flow toward the rear, heating the top 19 and also partly heating by conduction through the sides of the iire box the bottom tubes 15; thence to the right and left through lues 18 into the rear ends of the bottom tubes 15; thence forward in said tubes further heating the floor slabs 17 thence to the left and right in the flues 27 thence upward through the flues 26 into the front ends of the top tubes 28, thence rearward through said top tubes to heat the top of the baking chamber; thence into the i'lues 28 and thence through said flues 2S toward the center and by way of the chimney to the atmosphere.

Then the oven is sufficiently hot within the judgi'nent and experience of the baker, the fuel may be cut olf from the burner 12 and said burner may be swung into the position shown in solid lines, Figs. 5 and 6 and the inner door 10 will then be closed and the baking process will continue until the articles have been baked, whereupon said articles may be removed and other articles placed in the baking chamber' for baking, and from time to time the burner may be put into commission to maintain theoven at a desired baking temperature or to increase the temperature. If the oven is too hot and bakes too quickly, the temperature of the baking chamber' 16 will be readily lowered by opening the door 20 and operating the dampers 37 to open the vents 3G so that the hot air will be drawn out of said chamber. As the baking process proceeds the valve 22 may be opened. from time to time as desired to supply moisture to the baking chamber` so as to prevent burning of the articles being baked.

1. A bake oven comprising a lire box, a baking chamber of greater width than the fire box, the top and bottom of said chamber each being formed of a series of separate tubes, the top and bottom tubes being in communication with one anotherI at their front ends, a dead air cell along the upper' side of each of the top tubes the bottom tubes at their rear ends communicating with the fire box, and a chimney in communication with the rear ends of the top tubes.

A bake oven comprising a fire box, a baking chamber above the fire box, the top of said fire box forming a portion of the bottom of the baking chamber, the top and another portion of the bottom of said chamber each being formed of right and leftsep-` arate series of longitudinal tubes, a right vertical Hue and a left vertical flue connecting the front ends of the right top and bottom and the left top and bottom series respectiif'ely of the longitudinal tubes, the rear ends of the bottom tubes being in communication with the ire box, and a chimney communicating with the rear ends of the top tubes.

3. A bake oven provided with a baking chamber having its floor partially formed of longitudinally arranged tubes, and a iire box connected to said tubes, the top of said lire box partially forming the fluor of the baking chamber.

4f. A bake oven` provided with a baking chamberhaving its top formed of tubes, a

dead air cell along the upper side of each of said tubes and a iire box connected to said tubes.

A bake oven provided with a baking chamber having its .floor and top formed of tubes placed side by side, said tubes communicating with one another at their front ends, an upper and a lower dead air cell along the upper side of each of the top tubes and a fire box connect-ed to the rear ends of the floor tubes.

6. A bake oven, comprising a baking chamber having its floor formed o-f tubes, said floor increasing in thickness at the front end from the center toward the sides, and a fire box connected to the rear ends of said tubes. c

7. A bake oyen, comprising a baking chamber havingits floor formed of tubes, said floor increasing in thickness from front to rear and also increasing in thickness at the front from the center toward the sides, and a fire box connected to the rear ends of said tubes.

8. A bake oven comprising a tire box, a baking chamber having its top formed of longitudinally arranged tubes and communicating with the lire box through inlets diminishing from the sides toward the center so that the tubes nearer the sides will receive more heat than the tubes nearer the center, and a chimney connected with the rear ends of said tubes.

9. A bake oven comprising a baking chamber having its top formed of longitudinally arranged tubes, the forward ends of the tubes being spaced apart from the front wall to form transversely extending fines and the front ends of the more central tubes being stepped forward beyond the forward ends of the tubes nearer the sides, a lire box connected with the forward ends of the tubes, and a chimney connected with the rear ends of said tubes.

10. A bake oven comprising a fire box, a

baking chamber above the level of said fire boxand having its top and the side portions of its bottom formed of tubes, the top of the fire box forming the median portionfof said bottom, partitions separating said tubes into right and left series for both top and bottom,vthe ends of the top tubes being spaced apart from the front and rear walls to form upper front iues and upper rear flues respectively and the ends of the bottom tubes y 'u nected with the upper rear flues.

11. A bake oven comprising a fire box, a baking chamber above the level of said fire box and having its top and bottom formed of tubes, partitions separating said tubes into right and left series for both top and bottom, the ends of the top tubes being spaced apart from the'front and rear walls to form upper front fines and upper rear flues respectively and the ends of the bottom tubes being spaced apart from the front and rear walls to form lower front flues and lower rear flues respectively, said lower rear flues opening into the lire box, a vertical flue at each front corner opening into the upper and lower front ,-iues, the floor of the bak-k ing chamber being thickened from front to rear and said floor alsoincreasing in thickness at the front end from the center toward the sides and the front wall adjacent the bakingchamber beingk thickened from the center toward the sides, and a chimney connected with-the upperrear flue.

12. A bakekoven comprising a longitudinally extending fire box,a baking chamber of greater width than and above the level of the fire box andy having its top and floor formed of open ended tubes, said top tubes being spaced apart from the top of the oven by dead air cells and said floor being aslant c upward from front to rear and thicker at the rear end between the bores ofthe Hoor tubesv and the baking chamber than at the front end, flues connecting the front ends of the top tubes to the front ends of the door tubes, and a chimney connected to the rear ends of the top tubes, the rear ends of the floor tubes communicating with the lire box.

13. A bake oven `comprising a baking chamber, fiues above and below the baking chamber connected with one another, a re box connected with said flues and opening through the front wall of the oven, an inner and an vouter door spaced apart from one another at the open end of the fire box, and a burner mounted in the space between the inner and outer doors.

111. A bake oven comprising a fire box, a baking chamber above the fire box and separated therefrom by al partition forming a portion of the floor of thebaking chamber, tubes on both sides of the partition forming other portions of the floor ofthe baking chamber and separated thereby into right and left series, separate flues connecting the fire box to the rightand left series respectively, a chimney, and other separate flues connecting the chimney to the right and left series respectively.

15. A bake oven comprising a baking chamber havingits top constructed of hollow tiles end to end to form an arch, each having separated bores and the lower bores forming flues and the upper boresforming dead air cells, a fire box connected to the front ends of said flues, and a chimney connected to the rear ends of said flues.

In testimony whereof, I have hereunto set my hand at Los Angeles, California this 1st day of June 1914.

AUGUST FINNILA. In presence of- JAMES R. ToWNsnND, GEORGE H. Hines.

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

\ Washington, D. G. l