US2141742A - Stove - Google Patents

Description

C. EHRET Dec. 27, 1938.

STOVE Filed April 25, 1938 2 Sheets-Sheet l O lll zeiL.

INVENTOR. Clement Ehre't 50M Mai ATTORNEY.

C. EHRET Dec. 27, 1938.

STOVE Filed April 23, 1958 Sheets-Sheet 2 |||I|||It l llllll:

YI hiya 3 ,INVENTOR. Clement Ehret BY [9W WA ATTORNEY.

Patented Dec. 27, 1938 UNITED STATES PATENT OFFICE s'rovs Clement Ehret, White Plains, N. Y. Application April 23, 1938, Serial No. 203,760

8 Claims.

This invention relates to stoves and is directed more particularly to kitchen stoves for domestic use, the structure being such as to permit of raising and lowering movement of the stove body with 5 respect to a normally stationary base, and to also provide for relative rotation of the various parts of the stove with respect to such base.

The present stove provides for a stationary base with a rotatably and vertically adjustable stove body having a relatively rotatable stove top. These various movements and adjustments may be accomplished without interfering with the feed of fuel to the burners or heating elements of the oven or stove top. The heating elements or burners may be supplied with a heating medium of any kind, such as gaseous or liquid fuel or electric current, as will be hereinafter more fully explained.

The object of the invention is to provide a stove 20 which is extremely convenient to use and one which is perfectly safe in its operations.

Features of the invention, other than those adverted to, will be apparent from the hereinafter detailed description and claims, when read in conjunction with the accompanying drawings.

The drawings illustrate diiierent practical embodiments of the invention, but the constructions therein shown, are to be understood as illustrative, only, and not as defining the limits of the invention.

Figure 1 shows a gas stove embodying the present invention with" parts thereof in section and other parts thereof in elevation.

Figure 2 is a section on the line 2-2 of Fig- 35 ure 1.

Figure 3 is a view similar to Figure 1, but showingthe invention as carried out in an electric stove.

Referring first to Figures 1 and 2, the stove is 40 here shown as comprising a base I and a stove body 2. The base has an upstanding cylindrical portion 3 into which is telescopically received a stem 4. The stove body 2 has a centrally located depending cylindrical trunnion 5 rigid with the stove body and extending into the stem 4 to rotatably mount the stove body on the stem. The trunnion may, however, be locked to the stem against rotation by a set screw 6. 50 The ,stem 4 is provided at one side with an upright slot and in this slot is fixed a rack I rigid with the stem so as to move therewith. With this rack meshes a pinion 8 fixed on a shaft 9 which is supported for rotation in a housing I formed on the upstanding cylindrical portion 3 of the base and forming therewith a closed chamber adapted to receive and house a lubricant.

Also fixed on the shaft 9 is a worm wheel II which meshes with a worm l2, journalled in the casing in and carried by an operating shaft l3. This shaft extends out through the wall of the housing and is adapted to receive a crank, hand wheel or other suitable operating means, shown as a crank l4 in Figure 2.

It will be apparent that, as a result of this 10 construction, the rotation of the crank IE will cause the stem 4 to be raised or lowered to any desired elevation or adjustment in order that the stove may be positioned at the most convenient height for the particular person who is to use it and, when the crank is released, the worm will lock the worm wheel, so that the parts cannot inadvertently get out of position. In practice, the casing i0 may be packed with grease or other lubricating material, so that the parts will be lubricated to operate without noise and without appreciable wear.

The stove body 2 may be of any desired shape and is provided with one or more ovens closed by appropriate doors IS. The upper part of the stove body has anti-friction rollers l6 adapted to support a rotatable top H comprising a top plate I8 with an annular peripheral ring IS, the lower edge of which bears upon the anti-friction devices 16 to mount the top for rotation.

One or more braking devices are preferably secured on the stove body and are in the form of leaf springs l6 bearing against the under edge of the rotatable top ring [9 to exert a slight braking actionthereon and thereby retard too rapid or free rotation of the rotatable top.

The stove shown in Figure 1 is of the type adapted to burn liquid or gaseous fuel and is provided with burners or other heating elements 20 supported on a rotatable top and selectively fed from an annular header 2| through individual control cocks 22. Fuel is fed to the header through a pipe 23 which is rigid with the header and extends radially inwardly to the axis of rotation of the stove body and is there connected through a pivotal joint 24 to a pipe 25 which extends across the top of the oven, thence down the side and across the bottom of the stove body beneath the oven to the axis of the stove and there connects with an upright pipe 26. The pipe extends downwardly and has a slip connmtion with an upright pipe 21 connecting with a horizontal pipe 28 leading out through the base to a source of gas supply. The pipe 26 has a sliding fit within the pipe 21 and suitable glands or packiii ing may be associated with these two pipes to preclude leakage but to permit of relative rotation or coaxial sliding movement between them. At the upper end of the pipe 26 a branch pipe 29 leads to the oven burner 30 and the supply of gas thereto is controlled by a cock 3|.

This arrangement allows the stove body to be raised and lowered and also rotated with respect to the base and also permits the rotatable top of 'the stove body to be rotated with respect to the stove body, all without interfering with the supply of gas to the burners or 30.

One or more of the anti-friction devices I5 is provided with a clamping handle 32, so that it can be locked against rotation when it is desired to secure the rotary top against rotation relative to the stove. The set screw 6 provides for locking of the stove body against rotation with respect to the shank 4. The tie bolt 33 looks the rotatable top to the stove body, so that it cannot be inadvertently lifted off.

The structure shown in Figure 3 is similar to that of Figures 1 and 2, but differs therefrom in that Figure 3 shows a stove wherein the heating medium is electricity. The stove of Figure 3 has a base I with the upstanding cylindrical portion 3 and the telescoping shank 4 as before, these parts being vertically adjustable by the rack and pinion, worm and worm wheel connections described.

The stove body 2 has a rotatable stove top I! adapted to be.'clamped against rotation by the locking handle 32 and said stove body has the depending trunnion 5 adapted to be locked against rotation when desired by the set screw 5.

However, it will be noted that the rotatable top has electric heating units or burners diagrammatically shown at 34, while the roasting and broiling oven has one or more heating units or burners, diagrammatically shown at 35. These units and the wiring connections therefor are so associated as to permit of relative rotation of the several parts of the stove and also allow of vertical adjustment of the stove body. This is accomplished in the manner next to be described.

An electric feed cable 31 enters the base through an opening 36 and this cable is looped within the base to provide sufiicient slack to allow of vertical adjustment of the stove body. The two wires 38 and 39 of the cable are separated and one passes upwardly through a central passage through the stem 4, in insulated relation thereto, and is connected to a center contact 4D fixed at the center of an insulating member 41. The other wire 39 passes upwardly through an off center channel 42 and is connected to a conductor ring 43 concentric with the center contact 40 and insulated therefrom. The trunnion 5 carries two spring pressed brushes 44 and 45, respectively, insulated from one another and bearing against the contact 40 and the conductor ring 43, respectively, so as to permit the trunnion to rotate while maintaining the electrical connections. From the brushes 44 and 45, wires 46 and 41, respectively, lead to a coaxial contact 48 and a conductor ring 49 insulated from one another and positioned on the top of the stove body beneath the rotatable top. The rotatable top carries an insulating block 50 in which is supported a center brush 5| and an off center brush 52 which two brushes respectively engage the contact 48 and the ring 49 and with these brushes the heating elements 34 are connected in multiple with control switches 53 included in the circuits, so that said elements can 'be individually controlled. Across the wir s 46 and 41 is a shunt circuit 54 including the oven heating element or elements 35 and a control switch 55.

With this arrangement the rotatable top H is free to rotate with respect to the stove body and the stove body is free for rotation or vertical adjustment with respect to the base, all without interfering with the feed of electrical current to the respective burners.

It will thus be seen that in stoves of this invention, the top may be rotated while the body and base remain stationary, or the body and the top may be rotated collectively or the body may be rotated with the top remaining stationary, while in the position of fixed vertical adjustment or during vertical adjustment. Furthermore the stove body may be vertically adjusted without concurrent rotation of either the body or the rotatable top thereof. Also the body may be locked with respect to the base by the set screw 6 and the top can be locked to the body by the handle 32.

In the accompanying drawings the vertical adjustment of the stove is carried out by novel me-' chanical means which permits of the raising and lowering of the stove body with respect to the stationary base. However, this vertical adjustment may be accomplished hydraulically or pneumatically without departing from this invention.

I have hereinbefore referred to the stove body as provided with an oven with which is associated suitable heating elements in the form of burners or resistance windings. I wish it understood that by reference to this oven, I mean to include either or both the roasting oven and a broiling oven, or a combination thereof and that the heating elements associated therewith will be appropriate to the particular use of the oven.

Some of the subject matter disclosed in this application is claimed in my copending application Serial No. 140,115.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. A stove comprising a base, a stove body rotatably supported on said base, a stove top rotatably supported on the stove body, an electric heating element supported on and carried by the stove top, electric current feeding lines 4 extending through the base upwardly through the body to the heating element and provided with relatively rotatable coaxial current carrying contacts arranged between the base and the body and between the body and the stove top to permit of relative rotation between said base, body and top without disturbing heating medium current supply for said heating element.

2. A stove comprising a base, a stove body rotatably supported on the base, a stove top rotatably supported on said body, electric heating elements supported on and carried by the stove top, cooperating upper current carrying contacts carried by the stove top and by the stove body and yieldably engaging one another, the current carrying contacts of the stove top being electrically connected to the heating elements, additional cooperating lower current carrying contacts carried by the stove body and by the base and yieldably engaging one another with the lower contacts of the stove body electrically connected to the upper contacts of the stove body and the contacts of the base connected with a suitable source of current supply.

3. A stove comprising a base, a stove body rotatably supported on the base, a stove top rotatably supported on said body, electric heating elements supported on and carried by the stove top, cooperating upper current carrying contacts carried by the stove top and by the stove body and yieldably engaging one another, the current carrying contacts of the stove top being electrically connected to the heating elements, additional cooperating lower current carrying contacts carried by the stove body and by the base and yieldably engaging one another with the lower contacts of the stove body electrically connected to the upper contacts of the stove body and the contacts of the base connected with a suitable source of current supply, an oven in the stove body, an elecric heating element for the oven, and electrical connections between the lower stove body contacts and the heating element of the oven.

4. A stove comprising a base, a stove body having an oven and supported on the base for rotation and vertical adjustment with respect thereto, a stove top rotatably supported on the stove body, an electric heating element supported on and carried by said stove top, an additional elec tric oven heating element supported on and carried by the stove body, electric heating medium supply connections extending from the base through the stove body to the heating elements of both the stove body and stove top and provided with relatively rotatable coaxial connections between the base and the body and between the body and the stove top to permit of relative rotation between said base, body and top without disturbing the feed of the electric heating medium, said connections being also provided, within the base, with a loop to permit of vertical adjustment of the stove body with respect to the base.

5. A stove comprising a base, a stove body having an oven and supported on the base for rotation and vertical adjustment with respect thereto, a stove top rotatably supported on the stove body, a heating element supported on and carried by the stove top, an additional oven heating element supported on and carried by the stove body, a heating medium supply conduit extending from the base through the stove body to the heating elements of both the stove body and the stove top and proyided with relatively rotatable and vertically extensible connections between the base and the body to permit of rotation and vertical adjustment of the body with respect to the base and with rotatable connections between the body and stove top to permit of relative rotation between the top and the stove body without disturbing the heating medium supply.

6. A stove comprising a base, a stove body provided therein with an oven and rotatably supported on the base, means for locking the stove body against rotation relative to the base, an independently rotatable stove top externally of the oven and superimposed on the stove body, and other means for locking the stove top against rotation relative to the stove body.

7. A stove comprising a base, a stove body provided therein with an oven and rotatably supported on the base, means for locking the stove body against rotation relative to the base and in any desired angular position thereon, an independently rotatable stove top externally of the oven and superimposed on the stove body, and other means for locking the stove top against rotation relative to the stove body and in any desired angular position thereon.

8. A stove comprising a base, a stove body having an oven and supported on the base for rotation with respect thereto, a stove top rotatably supported on the stove body, a heating element supported on and carried by the stove top, an additional oven heating element supported on and carried by the stove body, a heating medium supply conduit extending from the base through the stove body to the heating elements of both the stove body and the stove top and provided with relatively rotatable connections between the base and the body to permit of rotation of the body with respect to the base and with rotatable connections between the body and the stove top to permit of relative rotation between the top and the stove body without disturbing the heating medium supply.

CLEMENT EHRET.

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