US2221445A

US2221445A - Stove support

Info

Publication number: US2221445A
Application number: US247571A
Authority: US
Inventors: Ehret Clement
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-12-24
Filing date: 1938-12-24
Publication date: 1940-11-12
Anticipated expiration: 1957-11-12

Description

Nov. 12, 1940. c. EHRET 2,221,445

STOVE SUPPORT Filed Dec. 24, 1938 5 Sheets-Sheet l INVENTOR. Clement Ehret ATTORNEY.

. Nov. 12, 19406 c. EHRET 222L445 STOVE SUPPORT Filed Dec. 24, 1938 3 Sheets-Sheet 2 jfliyo I N VEN TOR.

Clement Ehret ATTORNEY.

Nov. 12, 1940.

c. EHRET 2,221,445

STOVE SUPPORT INVENTOR Clement Ehret MXWZ Patented Nov. 12, 1940 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to stoves and more particularly domestic kitchen stoves of the general character forming the subject matter of my application, Serial No. 203,760, filed April 23, 1938,

maturing into Patent No. 2,141,742, on December 27, 1938, of which this application is a continuation in part.

This type of stove is characterized generally by the provision of a stationary base on which a '10 stove body, comprising one ormore ovens and a cooking top portion, ismounted for vertical adjustment and rotation with respect to such stationary base.

The present stove provides novel and eflicient means for raising and lowering the stove body withrespect to thebase and also means whereby the stove body may-be rotated andlocked in any desired position of vertical and rotary adjustment.

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

The accompanying drawings illustrate dif-- .25 ferent practical embodiments of the invention, but the constructions thereinshown are to be understood as illustrative, only, and not as de- "fining thelimits of the invention.

Figure 1 is an elevation of a stove embodying the present invention, with portions of suchconstruction shown in vertical section.

Figure 2 is a horizontal section taken in the plane of the line 2--2 of Figure 1.

Figure 3 is a fragmental section taken in the plane of the line 3-3 of Figure 2 with certain parts shown in elevation.

Figure 4is afragmental perspectiveof a worm operating splined shaft shown in the preceding views.

Figure 5 is an end View of one of the worms, internally splined to cooperate with the shaft of Fi ure 4.

.Figure 6 is a view similar to Figure 1, but :showing amplifications in operating means.

Figure 7 isan end view of the structure shown inI'Figure 6.

The stove of the present invention comprisesa stationary base I and a stove body 2, the latter of which is rotatable and vertically adjustable with respect to the base i. The base comprises an upstanding cylindrical portion 3 into which istelescopically received a stem-4 which, in the construction of Figures1-5, is rigidly and permanently secured-to the stove body. Referring to .thesedigures.in,particularpthenstem 4 is cylindrical in form and is provided with vertically spaced apart annular grooves or channe1s5, the

spacing being substantially the same as the width of the channels. The upper end of the cylindrical portion of the base 'is flanged outwardly,

asindicated at6, to form an annular chamber or seat in "which is received a ring gear I which bears upon the base of such annular chamber andembraces the stem 4.

The ring gear 1 has worm teeth in its'outer 10 periphery and carries, on its inner periphery, one

or more projecting keys 8, rigid. with the ring 1 gear, andthese' keys are adapted to work in shallow vertical keyways 9 out intothe'stem 4 so that the stem can slide up and down through the ring 15 gear but isl'ocked against rotation thereto; Thus rotationof the ring gear will impart rotation to the stem 4 and consequent rotation to the stove body 2.

Preferably cast integral with the base l is aL20 housing ii the conformation of which is clearly apparent from Figures 1 and 2. In this'housing are located the various operating parts by means of which the stem may be selectively raised,

lowered and rotated. To provide for the vertical *25 adjustment of the stem, a shaft ii is journalled for rotation in the-housing l0 and has aflixed thereto a pinion l2 adaptedto mesh into the grooves 5 of the stem 4 which, because of the formation of these grooves, constitutes, in efiect, 30.

a cylindrical rack. Through rotation of the pinion I 2, the stem may be raised and lowered and the cylindrical character of the rack permits of rotation of the same with reference to the pinion I2. -35

Also journalled for rotation in the housing 10 is a worm shaft i3, capable of longitudinal reciprocation and on this worm shaft are mounted I two worms, indicated by thereference numerals i4 and i5. Theworm i4 is constantly in m'esh flo with a subjacent worm wheel l6, fixed on the shaft ll which carries the pinion l2. Theworm 15 isin constant mesh with the ring gear 7. The worms are in axial alinementand are confined against longitudinal movement between the bear- 45 .ings in the housing and they are adaptedto be independently rotated by the shaft l3. To perwheel or crank, the shaft I3 may be longitudinally shifted to engage its spline I1 with either the socket I8 of the worm I4 or the socket I9 of the worm I5. When engaged with the socket I8, as shown in dotted lines in Figures 1 and 2, rotation of the wheel 20 will cause power to be transmitted from the shaft I3, through worm I4 and worm wheel I6 to the shaft II which, in turn, will transmit power through the pinion I2 to the cylindrical rack and the stove body will be raised or lowered, depending upon the direction of rotation of the hand wheel. By virtue of the worm and worm wheel connection in this train, the stove will be automatically locked in any position of vertical adjustment when the hand wheel is released and will remain in such position until the hand wheel is manipulated to effect a positive adjustment in the manner stated.

It is be assumed that the hand wheel has been manipulated to bring about the desired vertical adjustment of the stove body, said body may be rotated at the will of the operator by shifting the hand wheel from the dotted line position of Figure 2 to the full line position, in order to shift the shaft I3 to move spline I'I into the socket I9 of the worm I5. When the parts are thus positioned rotation of the hand Wheel will impart rotation to the ring gearwhich, being keyed to the stem 4, will rotate the stove body in either direction depending upon the rotation of the hand wheel. When the hand wheel is thereafter released the worm wheel and ring gear will lock the stove body against inadvertent rotation.

It will thus be apparent that the stove body may be vertically adjusted or rotated at the will of the operator and, at the conclusion of either operation, will be locked in position, so that it cannot inadvertently get out of adjustment.

The stove body will, in practice, be provided with appropriate ovens and a cooking top, with each of which are provided suitable burners or other heating elements to which a suitable heating medium will be fed in a manner to be uninterrupted by either vertical adjustment or rotation of the stove body. The means for feeding this heating medium will vary depending upon jthe characterof such medium. For oil, gas or 4 3 other fluid heating, medium tubular connections are'employed, whereas for electricity, wiring connections are substituted.

For illustrative purposes I have shown provisions for the feed of gas, comprising a gas feed 'pipe 2| connected to

telescoping pipe'sections

22 and 23. Section 22 is rigid with the base while the section 23 is rigid with the stove body and extends to the heating elements. Suitable packing glands may be provided between these sections, but in any event they allow for the raising and lowering of the stove body, as well as its rotation, without interruption of the feed of heating medium.

The structure of Figures 6 and 7 embodies all of the parts thus far described in connection with Figures 1-5, exceptthe handwheel and, in lieu of the hand wheel, there is substituted treadle arrangements for shifting the worm shaft I3 longitudinally and for rotating said shaft in either direction. To provide for longitudinal shifting of the shaft, there is firmly affixed there- 70 7 of this collar are positioned rollers 25 carried by to a flanged collar 24 'andbetween the flanges the bifurcated upper end of a lever 26. This lever is pivoted at 27 to a bracket 28 on the base and carries at its lower end oppositely offset foot tical adjustment or rotation.

downwardly by the foot, the worm shaft is shifted to the right to engage the spline I1 with the worm I4 and when the pedal 30 is depressed by the foot, the shaft I3 is shifted to the left to engage the spline with the worm I5.

The shaft I3 extends beyond the flanged collar and carries thereon a ratchet wheel 3| and a pawl carrier 32. The ratchet Wheel 3I is keyed to the shaft I3, so that when the ratchet is rotated, the-shaft is rotated, but the pawl carrier 32 is freely rotatable on the shaft. The pawl carrier 32 has an upstanding arm 33 to which is pivoted a double acting pawl 34, rigid with its pivot spindle 35. This spindle 35 projects through an arcuateslot in the housing I I] and carries a handle 36 by means of which it may be manually tripped over from the left hand position shown in Figure '7 to the right hand position in order that it may be conditioned to operate the ratchet wheel 3| in either direction. The ratchet carrier has aifixed thereto, exteriorly of the housing, a lever 3'! and secured to this lever isalso a pedal link 39 having a foot pedal 49. The lever 31 preferably has an upturned end portion projecting into readily accessible position and provided with a handle 38 whereby it may be grasped and directly operated. The 1ink39 is guided at its lower end by a guide rod 4| slidably projecting intoa guide, 42 on the base. By this means the lever 31 may be oscillated in a vertical plane, either by a hand directly gripping the handle 38 or by foot operation of the pedal 40. Downward pressure of the foot will depress the lever while a spring 43 will elevate it. Through manipulation of the lever either by the hand or foot as described, the pawl position of the pawl 34, which may be manually moved from one side to the other to control the direction in which it positively operates upon the ratchet wheel 3|. I

It will thus be apparent that in theconstruction of Figures Sand 7 a single treadle may be used to serve the dual purpose of vertically adjusting and rotating the stove body, while additional foot operated means selectively controls the delivery of power to bring about either ver- If desired, however, I may provide independent means for rotating and vertically adjusting the stove body and this means may be hand operated or treadle operated. For example, I may drive one of the worms I4 by a crank, lever, or treadle, to obtain vertical adjustment and use an entirely separate crank lever or treadle to operate the worm I5 to rotate the stove. In such case, the worms I4, I5 might well be fixed on their own individual shafts with the operating means connected to each shaft. Likewise the vertical adjustment means of Figures 6 and 7 may be incorporated in a structure without including the means for rotating the stove body and, conversely, the means for rotating the stove body may be incorporated in a construction without providing the means for vertically adjustin the same.

In the forms of the invention which I have thus far described, the ring gear is keyed to the stem 4, so that there is a positive drive from the ring gear to the stove body. I may, however,

eliminate the sliding key connection between these parts and line the inner periphery of the ring gear with friction shoes or some suitable friction material, such as leather, fiber or the like, so that the ring gear will have sufiicient friction with the stem to drive the latter through such friction connection. The advantage of this arrangement is that if it is desired to quickly rotate the stove body, it may be grasped and turned against the friction between its stem and the ring gear.

For the purpose of illustration I have shown in the drawings a gas stove, but I wish it understood that this invention is not limited to gas stoves as it may be used for oil stoves, vapor stoves or electric stoves. Similarly, the shape of the base, stove body and other parts may be varied within wide limits according to the taste of individual designers without departing from this invention.

The foregoing detailed description sets forth the invention in its preferred practical forms, but the invention is to be understood as commensurate with the appended claims.

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

1. A stove body support comprising a base, a body supporting stem telescoping with respect to the base and having a coaxial cylindrical rack, a ring gear supported on the base and embracing said cylindrical rack for rotation therewith, a pinion supported by the base and meshing with said rack, a worm wheel rigid with said pinion, a pair of Worms arranged in coaxial relation and meshing respectively with the worm wheel and ring gear and each worm having a clutch member, a common operating shaft extending through both worms and provided with a clutch member adapted, through longitudinal movement of the shaft,to engage with the clutch member of either worm selectively, and means for rotating said shaft.

2. A stove body support comprising a base, a body supporting stem rotatably supported on the base, a ring gear keyed to the stem for rotation therewith and for sliding movement with respect thereto, means for rotating the ring gear to rotate the stem, and means for vertically moving the stem while the ring gear remains stationary.

3. A stove body support comprising a base, a body supporting member mounted on the base for vertical adjustment and for rotation with respect thereto, a vertical rack carried by said member and rigid therewith, an annular gear embracing said member for relative axial movement and for rotation therewith, a pinion supported on the base and meshing with the rack to raise and lower the member, and a pinion mounted on the base and meshing with the annular gear to rotate said member.

4. A stove body support comprising a base, a stove supporting stem telescoping with respect to the base, a vertical rack on said stem, an annular gear secured against rotation to the stem with respect to which the stem is axially movable, a single operating shaft supported on the base for rotation,, and means for selectively connecting said shaft to the annular gear and to the rack whereby operation of said shaft may rotate the supporting stem or vertically adjust the same as may be desired.

CLEMENT EI'mET.