US2143994A

US2143994A - Range stbuctcbe

Info

Publication number: US2143994A
Authority: US
Publication date: 1939-01-17
Anticipated expiration: 1956-01-17

Description

Jan. 17, 1939. c, T MC LONE 2,143,994

RANGE STRUCTURE Filed May 19, 1936 3 Sheets-Sheet l Jan. 17, 1939. c. T. MCGLONE RANGE STRUCTURE 5 Sheds-Sheet 2 Filed May 19, 1936 Char/es 7. /V 6 Z0 c. T. MOGLONE 2,143,994

RANGE STRUCTURE Jan. 17; 1939.

Filed May 19, l936 3 Sheets-Sheet 3 I 77, m v 1 gwuc/wto'r/ Qua e5 77w G Lone Patented Jan. 17, 1939 I 2,143,994

UNITED. STATES PATENT OFFICE 2,143,994 A RANGE STRUCTURE Charles T. McGlone, Stroudsburg, Pa., assignor to Kol-Ax Co. Inc., Stroudsburg, Pa.

Application May 19, 1936, Serial No. 80,592

7 Claims. (Cl. 126-1) This invention relates to heating devices, and Figure 8 is a sectional view taken on the line more particularly to an improved range and g 8-4! of Fig. 1. a means for maintaining a predetermined temper- Figure 9 is a detail front elevation, partly ature interiorly thereof and on the cooking surbroken away, of a modified form of this invenface thereof, and is a continuation in part of tion. my co-pending application on Range structures, Figure 10 is a fragmentary enlarged front ele- Serial No. 26,475, filed June 13, 1935. vation of the thermal control.

An object of this invention is to provide in a Figure 11 is a vertical sectional view taken range structure means for quickly heating the through the center of the blower.

w cooking surface thereof and maintaining such Figure 12 isavertical section taken transversely 10 heat at a predetermined temperature. through the fan or blower.

Another object of this invention is to provide Referring to the drawings, wherein like symin a range structure means whereby practically bols refer to like parts throughout the several complete combustion of the fuel is attained, so views, the numeral l0 des gnates generally an 15 that a low grade of fuel may be used, thus very outer casing of suitable size, which is provided 15 materially reducing the operating costs of the with an upstanding warming shelf structure [3. range. The wall of the casing Ill may be constructed of A further object of this invention is to provide uitable h a r in m erial, an a cookin a range structure and means for obtaining the top H extends substantially over the entire length desired heat from a relatively low grade fuel of the casing Ill. 20 which is controlled in a novel manner so that A grate Structure is 0 d Within the the heat generated by the fuel will be retained casing in adjacent one end, and is disposed above within the range until it has been dissipated. a combined s Chamber and air p ure c a A still further object of this invention is to A firebox M of j ed O StrHCtiOII is provide a means which may be used in the form di p s above the grate a d the inner ver- 25 of an attachment for arange structure for obtical Of this firebox I is p q ed W & taining a turbulent movement within the com- Plurahty of Spaced apart Opemngs bustion chamber of the range so that the n inner wall ll extends from the bottom It and terminates at a point spaced downwardly from holes of combustion W111 not be quickly drawn the top a L This inner wall H is Spaced from out through the smoke pipe. 3

Still another object of this invention is the g g gg ii gg firebox so that an may freely fi i g fi z iig gg tg 2 1:3 3 An inner bottom wall I9 extends horizontally turbulent movement within the firebox or comof the casing being securegi-at one end to the inner vertical wall or partition H, and at the bustlon chamber of h F other end to an end wall 20. A plurality of 35 other obJect? of the mventlon W111 be appar' ovens 2| and 22 are disposed within the casing em cm following descriptionof the present It] and supported in downwardly spaced relation preferred form of the invention taken in cont th top H so as to provide an upper heating nection with theaccompanyingdrawings,wherein: duct 23. The oven 22 is spaced from the end 40 Figure 1 is a detail front elevation of a range wall 20 and thereby provides a duct 24 which 40 structure constructed according to an embodicommunicates with the upper duct 23. The bot- 'ment of this invention. tom of the oven 22 is also spaced from the inner 1 Figure 2 is a vertical section taken longitudibottom I9 and thereby provides a lower heating nally through the range. duct 25 which communicates at one end with the Figure 3 is a vertical section taken on the line lower end of the duct 24. 33 of Fig. 2. The oven 2| is disposed in upwardly spaced Figure 4 is a Vertical Section taken 11 the lin relation tothe inner bottom l9 so-that the hot l l of Fig. 2. gases in the duct 25 may freely pass beneath 5O Figure 5 is a fragmentary sectional view taken this oven and enter a vertical duct 26 which is on the line 5-5 of Fig. 1. disposed between the wall H and the adjacent F u 615 a fragmentary Sectional w taken wall of the oven 2|. An intermediate duct 21 on the line 6-6 of Fig. 2. is disposed between the two ovens 2| and 22 and Figure 7 is a perspective view of one of the communicates at its upper end with the duct 23 bafiles within the range. and at its lower end with the duct 25.

A bafile 28 is rockably mounted on a shaft 29 having a handle 30 at one end, and this bafile 28 may be provided with openings 30 so as to eliminate any dead space between the two ovens 2i and 22 when the bafile 28 is disposed in the position shown in full lines in Fig. 2. This bafile 28 permits cutting ofi the oven 22 and also shortening of the heated portion of the top H.

A rear flue 32 extends along the rear of the casing I 0, and has an outlet 33 which is controlled by a damper 34 operated by a damper rod 35 which extends forwardly and is provided with a handle 36 for operation thereof. A suitable smoke pipe or carry-off pipe may be connected to the nipple or outlet 33.

The air pressure and ash chamber 31 which is disposed below the combustion chamber 38 is provided with a door 39 which is preferably imperforate and is normally held in tightly locked position. The usual draft controlling members are eliminated from this air chamber 31.

A fan or blower structure, generally designated as 40 is mounted in the chamber 4| between ,the inner bottom l9 and the bottom l8, and an air duct or pipe 42 is connected at one end to the blower 40 and at the other end to the inner wall I! within 'the air chamber 31. The blower 40 comprises a housing 43 having a perforate plate 44 secured to one side thereof and disposed axially thereof, air being freely admitted to the housing 43 through the perforations of this plate 44.

The blade structure for the blower 40' comprises a pair of opposed spaced apart truncated members 45 and 46 having annular flanges 41 and 48, respectively. Radial blades 49 are positioned between the bases of the truncated members 45 and 46 and are secured to a hub 49a which is fastened to a drive shaft 50 carried by a motor 5|. Intermediate blades 52 are disposed between the blades 49 and are shorter in length than the blades 49, their inner ends being disposed farther away from the hub 49a than the blades 49. orificebetween the fan -blades at the periphery of the fan structure the air is given a rotary or turbulent motion which continues within the P pe 42 and within the air chamber 31.

The motor 5|, which is an electric motor, is connected as by a conductor 53 to a thermal switch 54 which is mounted on the front wall 55 of the casing l0 and which is provided with a projecting portion 56 extending into the interior of the oven 2|. The switch 54 may be connected to a suitable source of electric current supply.

In Figure 9 there is shown a modified form of this invention wherein the blower 40' is connected to the air chamber door 31'. The motor 5| is connected as by a conductor 53' to a thermal switch 54 which is secured directly to the door 51 of the oven. In this form the blower means is used as an attachment for a range structure l0.

In the use and operation of this device, the fuel may be placed in the firebox l4 above the grate l2, and during the starting of the fire the damper 34 is opened. The thermal switch 54 is then set for the desired-temperature within the oven 2|, which will also provide the desired temperature on the top H. After the fire has been started the damper 34 is closed so as to cut off the uptake of the gases.

The air from the blower 40 will pass into the air chamber 31 in a turbulent stream, and a portion of this air will pass upwardly through the By providing a reduced discharge ai iaaei fuel while another portion of the air will pass upwardly between the inner wall l5 of the grate l4 and the partition l1. This latter air will then enter the combustion chamber 38 in a horizontal movement counter to the movement of the rising gases so that additional air is mixed with the hot gases which are retained within the combustion chamber a sufficient length of time to insure substantially complete combustion. The hot gases will then pass horizontally through the duct 23, heating the top 23 and the top of the ovens 2| and 22. Assuming that the baffle 28 is closed, the gases will then pass downwardly through the duct 24, and then return along the bottom duct 25. The hot gases in the duct 25 .will heat the bottoms of the ovens 2| and 22 and will then enter the duct 26 and pass back through the flue 32. The flue 32' will effect a heating of the rear portion of the top I I, the temperature of the rear portion of the top H being lower than that portion of the top I l overlying the duct 23 so that articles may be kept warm when resting; on the rear portion of the top H. The damper 34 is provided with the usual gas passages so that a reduced quantity of gas may pass therethrough when the damper 34 is closed.

Where it is desired to cut ofi the oven 22 the baflie 28 may be raised so that the gases in the duct 23 will pass downwardly through the duct 21 into the bottom duct 25. In the event that the air pressure within the air chamber 3'! is too high so that the gases will be forced out through the top plates of the top I I, the pressure may be reduced by means of a damper 58 mounted in the pipe and secured to a rod 59 having a handle 60 disposed on the outer side of the front wall 55. Air is admitted to the chamber 4| through a perforate plate 6| which is removably secured .to the front of the range adjacent the blower structure so that when desired this blower structure may be serviced without undue inconvenience.

The range structure herein disclosed has been placed in numerous hotels where quick heating is necessary, and in every instance the range structure has effected an economy in operation suflicient to supplant other types of ranges using gas, oil or electricity as a heating medium. The fuel used in this range may be a relatively low grade of anthracite or bituminous coal and in actual use it is found that an entire day's operation of the range will produce only about two handfuls of ashes. The efiicient operation of the I range has been attributed partly to the turbulent action of the air and gases, and also to the fact that the range is operated in a manner opposed to the normal operation, that is, in a normal range when a hot fire is desired so as to produce the desired temperature along the cooking surface, the smoke pipe damper is left open, whereas with the present range structure the damper is closed.

Furthermore, the operation of the blower is controlled by means of the thermal switch 54 which is connected to the oven 2|, and in this manner the temperature of the oven 2| will regulate the temperature of the entire range. The thermal switch 54 may be of any suitable construction, it being only necessary that it operate within the temperature range required.

It is apparent that various changes may be made, especially in the details of construction, within the scope of the claims appended hereto.

What is claimed is:

1. A range comprising an outer casing, an oven disposed in the casing, a duct extending about said oven, a grate in the casing, a firebox in the casing above said grate and provided with air openings above said grate disposed in a position to provide a counter current within the upper portion of the firebox, electrically operated air pressure means below the grate, and thermally responsive-means projecting into the oven and connected to said air pressure means for regulating said air pressure means dependent upon the temperature of said oven. I

2. In a range having an oven, a grate, a combustion chamber above said grate, and a chamber below said grate; a blower connected to said latter chamber, an electric operating means for said blower, and a thermally responsive member connected to said operating means and project-' ing into said oven whereby to regulate said operating means dependent upon the temperature of the oven.

3. A range structure comprising an outer casing, a cooking top carried by' said casing, an oven within the outer casing \and having the walls thereofspaced from the walls of the outer casing and the cooking top to provide ,a duct thereabout, an inner wall within the casing spaced from the adjacent wall of the oven, an outlet duct carried by the casing, a damper within said outlet duct,

a grate supported within the casing between the inner wall and the adjacent outer wall of the outer casing, a pressure chamber below said grate, a combustion chamber above the grate communicating with said duct at the top of the oven and below said cooking top, a firebox extending above said grate having an inner wall thereof spaced from said first-named inner wall whereby to provide an air passage communicating at its lower end with said pressure chamber, said firebox having openings in the inner wall thereof communicating with said air passage and with the combustion chamber, the air from said pressure chamber rising vertically through said grate and firebox and then passing horizontally beneath said cooking top, the air from said air passage discharging horizontally into said combustion chamber in a direction counter to the movement of air and gases beneath said cooking top whereby to effect a swirling motion of air and gases within the combustion chamber, means for discharging air under pressure into the pressure chamber, and thermally responsive means forsaid latter means.

4. In combination, a range structure having discharging air into the chamber below said grate, a thermally responsive means projecting partly into said oven and partly exteriorly or said oven, and means connecting said thermal means with said blower whereby the operation o said blower is' dependent upon oven temperature.

6. In combination, a range structure comprising an oven, a duct extending about said oven, a grate, a firebox extending above the grate, a combustion chamber communicating with said firebox and with one end of said duct, said firebox having openings in the inner wall thereof, an air chamber below the grate, a duct communicating with said air chamber and with said air openings, an electrically operated blower discharging into said air chamber, a thermally responsive means projecting partly into said oven and partly:

,exteriorly of said oven, and means connecting said thermal means with said blower.

7. In combination, a range including a combustion chamber and an oven, a blower in communication with the combustion chamber, and a thermostat carried by the range oven and connected to the blower for controlling the operation of the latter by the oven temperature.

CHARLES T. McGLONE.