US1154114A - Stove. - Google Patents

Description

W. S. HADAWAY, JR.

STOVE.

APPLICATION FILED APR. 11. I914.

1,154,114. PatentedSept.21,1915.

2 SHEETS-SHEET I.

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W S. HADAWAY, IR.

STOVE.

APPLICATION FILED APR. 17. l9l4.

2 SHEETS-SHEET 2.

. I f I ll .PatentedSept. 21, 1915.

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WILLIAM S. HADAWAY, JR, OF NEW ROCHELLE, NEW YORK.

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Speoiflcatic 1 of Letters I'atent. Patented Sept. 21, 1915.

Application filed April 17, 1914. Serial No. 832,411.

To all whom it mag concern: V

Be it known that I, WILLIAM S. HADAWAY, Jr., a citizen of the United States of America, and a resident of New Rochelle,

Westchester county, and State of New York,

have invented certain new and useful Improvements in Stoves, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to stoves and heaters and has special reference to such as are electrically heated and are adapted for heating bookbinders tools.

Bookbinders and those employed on simi lar lines of work, utilize a multiplicity of different tools which are required to be heated to different temperatures, depending on the specific use to which they are put. For instance, the bookbinders tools are necessarily heated to a very high temperature for sheepskin burning, which is essentially a branding process, while other tools which are used on gold-leaf Work are heated to a relatively low temperature; in other Words, the temperatures to which the tools are to be heated vary over a wide range.

One object of my invention is to provide an electrically heated stove that shall be specially designed and adapted for bookbinders use.

Another object is to provide a simple and durable stove structure embodying a plu rality of heaters of unlike characteristics arranged to be selectively utilized, according to the conditions of service.

Other objects and advantages of my invention will be set forth hereinafter, and in order that my invention may be thoroughly understood I will now proceed to describe the same in the following specificationand then point out the novel features thereof in appended claims.

Referring to the drawings: Figure 1 is a transverse sectional elevation of an electrically heated stove arranged. and constructed in accordance with my invention. The same stove is shown in rear elevation in Fig. 2. Fig. 3 is a sectional plan view, taken on the line 3-3 of Fig. 2, certain of the parts being broken away to disclose the structure heaters which form of the electric heaters. Fig. 4 is a diagrammatic view of the circuit connections for the closed in the other figures.

Like characters of reference designate corresponding parts in all the figures.

The structure illustrated comprises a substantially rectangular body 10, a plurality of heaters 12 and 14, a selective switch 16, and a hood 18;

The body 10 comprises an outer box or casing 17 preferably formed of sheet metal, and an inner box 19 which is relatively shallow and is secured to an overturned flange 20 which extends inwardly from the outer box 17 at the top. The space between the outer and inner boxes or casings, is filled with mineral wool or some other suitable heat insulating material 21. The arrangement of parts is such that a rectangular body is produced having a relatively shallow rectangular recess centrally located in its top surface. In this recess 22 is disposed the electric heater 12 which is preferably of the radiant type, such as those shown and described in my copending application Serial No. 823,37 2 filed parts ofthe stove dis- March 9, 1914. It comprises a block 23 of soapstone or similar heat absorbent material, a zigzag resistance ribbon 24 mounted on edge and spaced at a short distance from the face of the block 23, and suitable clips 25 which are mounted on the block 23 and to which the ribbon is secured. In order to protect the resistance ribbon from injury and also to provide a rest upon which tools may be supported, a screen 26 is arranged to cover the openin of the re- 'cess 22. It comprises a frame 2 on which the wire netting is stretched, having downwardly extending lugs 28' which fit into the opening of the recess and hold the screen in position.

The heater 14 has the general form of a flat plate and may for example comprise a sheet metal top 30 and a plurality of flat heater units 31, each of which is protected by a sheet metal casing or jacket, welded or otherwise suitably secured in close contact with the underside of the sheet metal top 30. The heater unit itself may comprise a slotted ribbon 32, protected byinsu1ating to complete the circuit strips 33 of mica or other suitable material which is not injured by the heat. The heater 14 is hinge-connected at 35 to the body or base of the device so that it may be swung out of the way when not in use, as more fully explained hereinafter. It is provided with terminals 35 located near the axis of the hinge connection and protected by a terminal box 35".-

The hood or cover 18 has the general form of a rectangularbox pivoted at 36 at one side of the stove. It comprises inner and outer sheet metal shells 36 between which heat insulation 37 is packed. The cover has an openin 38 at. the front of the stove through w ich tools may be thrust without lifting the cover.

The heater 14, as shown in Fig. 1, is pivoted at the rear of the stove while the cover is pivoted at one side of the stove, the arrangement of parts being such that the cover may be closed as shown in Fig. 1 when the heater 14 is in service, or swung back to permit the heater 14 to be swung out of the way, and then utilized for covering the stove when only the'radiant heater 12 is in use. The terminals of the device are mounted on the stove at the rear as shown at 39 and are protected by a terminal box which has an opening 41 at one end through which the leads may extend. At the front of the stove is a switch which may be constructed in any suitable manner and is intended for the purpose of selectively connecting one or the other of the heaters in circuit, depending upon the position occupied by the heater 14, that is to say, when the heater 14 is swung upwardly into an inactive position the switch completes the circuit for the heater 12, but when the heater 14 is swung down into an active position it actuates the switch to interrupt the circuit for the heater 12 and for the heater 14.

The switch illustrated comprises a pair of spaced stationary contacts 43 and 44 and a slidably supported moving contact 45, in a suitable opening 46 of the body of the device. The moving contact has a pin 47 which extends upwardly through the top flange 20 of the outer casing and is adapted to be engaged by the heater 14 and pushed downwardly thereby in opposition to a spring 48. The spring tends to hold the movable contact 45in engagement with the stationary contact 43 but the weight of the heater 14, in its active position, holds the movable contact in engagement with the stationary contact 44. The spring is held in position by a projection 49'which extends downwardly through, and makes contact with a terminal member 50.

The circuit conductors and terminal leads are not shown in the structural views of the device but are clearly-shown in the diagram of Fig. 4, to which reference may now be had. Assuming that the heater 14 is in its lnactive position, circuit is completed from positive line conductor 55, through a terminal 50, contacts 45 and 43, heater 12, and conductor 56 to opposite line conductor 57. When .the heater 14 is returned to its active position the spring 48 is compressed and circuit is completed from line conductor 55, through a terminal 50, contacts 45 and 44, heater 14 and conductor 58 to line conductor 57 It is thus evident that the heaters are selectively energized without necessitating any attention from the operator except such as must necessarily be given to move the heater 14 according as it is wanted or not wanted.

' As hereinbefore outlined, a very high temperature is required in a certain part of the bookbinders work, such as for burning sheepskin or for heating tools for use in connection with aluminum leaf which requires a high temperature to make the sizing for the letters, hold securely. By utilizing my invention the heater 14 is merely thrown back like the lid of a box, the heat insulating cover restored to prevent loss of heat and the tools inserted through the opening 38 and placed on the screen 26, the input of the radiant heater 12 being insufficient to heat the tools to a high temperature in a relatively short time. The. high temperature produced by the radiant heater 12 is so much higher than is needed for a large proportion of the bookbinders work that it would be wasteful of energy and would cause arapid deterioration of the heater if this heater alone was utilized.

When low temperature work is to be done with the apparatus of my invention, the heater 14 is lowered into operative position and the tools placed directly plate of the heater. The amount of energy expended under these conditions is relatively low and the heater may be utilized continuously without appreciable deterioration.

Each of the heaters 12 and 14 is preferably controllable to produce three dliferent heats in a well-known manner, by manually operated switches (not shown). By this means not only a wide range of temperature is attainable but also intermediate temperatures may be readily selected to accommodate any particular service condition.

Structural variations may be effected within the spirit and scope of my invention and I intend that only such limitations be imposed as are indicated in the appended claims.

What I claim is:

1. A stove comprising a body, a radiant electric heater secured thereto and an armored electric heater pivotally connected with the body and adapted to be swung on the top heater adapted to operate at a high tempera ture, and a flat armored electric heater pivotally connected to the stove and adapted to be used alternately with the exposed heater and to operate at a relatively low temperature.

mored relatively low-temperature electric 3. A stove comprising a body having a high temperature exposed radiant electric heater, and a flat, protected relatively lowtemperature' electric heater adapted to be placed over the exposed heater and to be used alternately. therewith.

4. A stove comprising a body having a high temperature exposed radiant electric heater secured to the body and a flat arheater hinged to the body and adapted to be swung over the exposed heater and to be used alternately therewith.

' 5. A stove comprising a high temperature heater, a relatively low temperature heater hinge-connected and adapted to lie over the high temperature heater when in use, and means dependent upon the position of the low'temperature' heater for energizing the high temperature heater.

6. A stove comprising a heat insulating body having a recess in its top surface, an electric heater disposed in the recess, a screen covering said heater, a low temperature electric heater hinge-connected to the body and adapted to rest upon the screen,

and a switch for heaters.

7. A stove comprising a heat insulating body having a recess in its top surface, a radiant electric heater disposed in the recess, a flat low temperature electric heater selectively energizing the hinge-connected to the body and adapted to rest upon the screen, and a switch for selectively energizin the heaters.

8. A stove comprlsing a heat insulating body having a recess in its top surface, a radiant electric heater disposed in the recess, a screen covering the radiant heater, a flat low temperature electric heater hingeconnected to the body and adapted to rest upon the screen, and a switch automatically dependent upon the position of the low temperature heater for selectively energizing the heaters.

9. A stove comprising a heat insulating body having a recess in its top surface, an electric heater disposed in the recess, a screen covering said heater, a low temperature electric heater hinge-connected to the body and adapted to rest upon the screen, and a switch actuated by the low temperature heater and dependent upon the position thereof for selectively energizing the heaters.

10. A stove comprising a heat insulating body having a recess in its top surface, an electrlc heater d sposed in the \recess, a screen covering sald heater, nd a low tem- I upon the screen,- and a switch biased to connect the high temperature heater in circuit and actuated by the low temperature heater in its active position to disconnect the. high temperature heater and connect the low temperature heater in circuit.

12. A stove comprising a heat insulating body having a recess in its top surface, a radiant electric heater disposed in the recess, a flat low temperature electric heater hingeconnected to the body and adapted to rest upon the screen, and a switch automatically dependent upon the position of the low temperature heater for selectively energizing the heaters.

13. A stove comprising a heat insulating body having a recess in its top surface, a radiant electric heater disposed in the recess, a flat low temperature electric heater hingeconnected to the body and adapted to rest upon the screen, and a switch biased to connect the high temperature heater in circuit and actuated by the low temperature heater in its active position to disconnect the high temperature heater and connect the low temperature heater in circuit.

14. A stove comprising a heat insulating body having a recess in its top surface, a radiant heater disposed in -the recess and comprising a slab or block of heat absorbing material and a zigzag resistance strip supported by and spaced from the top surface of the block, a screen covering the radiant heater, a flat low temperature heater hingeconnected to the body and adapted to rest upon the screen, and a switch for selectively energizing the heaters.

15. A stove comprising a heat insulating body having a recess in its top surface, a radiant heater disposed in the recess and comprising a slab or block of heat absorbing material and a zigzag resistance strip supported by and spaced from the top surface of the block, a flat low-temperature heater hinge-connected to the body and adapted to rest upon the screen, and a switch for selectively energizing the heaters.

16. A stove comprising a body, a heater mounted therein, a second heater hinge-connected to the body at one side and adapted to cover over the body heaterwhen active, and a heat insulating hood hinge-connected to the body and arranged to cover the stove In witness whereof, I have hereunto set irrespective of which heater is active. my hand in the presence of two subscribing 17. A stove comprising a substantially rec- Witnesses, this 15th day of April, 1914. tangular heated body, a heater hinge-con- WILLIAM S. HADAWAY, JR. 5 nected to the body -at one side, and a hood Witnesses: hinge-connected to the body at an adjacent R. J. DEARBORN,

side. F. GRAVES.

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