US1161522A - Cooking apparatus. - Google Patents

Description

R. M. G. PHlLLlPS. 000mm; APPARATUS APPLICATION FILED AUGJU, m4.

Patented. Nov. 23, 1915. 4 SHEETS-SHEET 1.

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R. M. G. PHILLIPS. COOKING APPARATUS APPLICATION FILED AUGJO, 1914. I v

Patented Nov. 23, 1915.

4 SHEETS-5;;ET 2.

COLUMBIA PLANDGR AIN C0..WASHINHTON. D. C

R. M. G. PHILLIPS. COOKNG APPARATUS APPLICATION FILED AUG.IO. 1914.

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.COLUMBIA PLANOORAPH CO.,\VASHINDTON, n. c.

" apparatus in their open positions.

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COOKING Arrhenius.

Specification of Letters Patent.

Patented Nov. 23, leis.

Appncati'on mea August 10,1"914. s'efiafivofs5'e045.

To all whom it may concern Be it'known that 1, Ross G. PHILLIPS, a citizen of the United States, residing at West Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Cooking Apparatus; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings CQilStlttltG part of this application and represent, in

Figure 1 a view partly in right hand side elevation and partly in vertical section, of a cooking apparatus constructed in accordance with my invention, the food-compartment'being sealed. F i 2 an underside view thereof, the legs being broken away. Fig. 3 a broken view in vertical section of the lower end of the food compartment on the line a .7) of Fi 2 and showing the shutter of the ingress air passage in its closed position. Fig. 4 a bro-kendetail view showing the means for raising the outer end of the shutter against its seat. Fig. 5 a broken view in front elevation of the lower end of the apparatus showing the preheater in its centered position. Fig. 6 abroken detail sectional view of the bL'irner-swivel. Fig. 7 a broken detail view in vertical section showing the lower end of the timing apparatus, and showing the means employed for.

holding the shutter and the damper of the Flg. 8 a-view in right hand side elevation showing a cooking apparatus of the oven type with my improved means applied to 1t. Fig. 9 a plan view thereof. F1g.10 a broken view in vertical section on the llne cZ of Flg.

'7 showing the dam oer eni 310 ed to close the air egress passage of the-modified apparatus. Fig. 11 a broken detail v ew showmg the relief-valve with which the valve 71 closing the egressdraft-passage is provided. Fig. 12 a correspondmg view of thereliefvalve with which the damper of the modified form shown in Figs. 8, 9 and 10 is provided.

My invention relates to an improvement in cooking apparatus of the type in which a food-compartment vis provided with ingress and egress draft-passages which are automatically closed for the sealing of the compartment after the samehas been heated for a predetermined time, the object being to produce a simple, convenient and eco no'n'iical apparatus of the character de-' scribed. i

.lVith these ends in view, my invention consists in a cooking apparatus having o'ertain details of construction and combinations of parts as will be hereinafter described and pointed outin the claims.

Incarryingout my invention as shown in 1 to 7 inclusive, I employ. a normally stationary but removable, cylindrical foodcontainer 2 having a cooking-coinpartment 3, formed in its bottom with a concentric ingress draft-passage 4 and provided with a double-walled insulatedcover having a concentric egress draft-passage 6. As shown, thefoodcontainer 2 has an inner wallfor shell 7 and outer wall or shell 8, the annular space between these walls being filled with any suitable insulating material 9, such as a compound of asbestos.

The inlet draft passage 4. is closed and sealed by meansof a horizontally arranged closure or shutter having oscillating and vertical movement. The said shutter is furnished at its inner end with a dependinghub l1 turning upon a "stud 12 upon which it is held by a nut 13 applied to the threaded,

lower end of the said stud the upper end of which is screwed into the edge of a circular plate lit formed upon its lower face with an annula'r sealing-rib 15 which is set into a circular opening 16 ronaeain a rectangular sheet metal. base 17 supported upon legsv 18. The said plate 14- is formed initsupper face with a shallow, circular recess 191 c? ceiving an insulating ring 20 of asbestos or other. material upon which the food-container 2 is seated as clearly shown in Fig. 3. The said hub 11 is enci cled a helical spring 21 arranged to, exert a constant effort to swing the shutter 10 into position to close the ingress draftpassage 4, this swinging lnovei'nent being arrested by a stop-lug 22 upon the lower faceof the platelet.

Provision is made-for a slight vertical movement of the hubll upon the stud 12 so that the spring 21 eXert s an upward pressure on the shutter for the purposeof firmly seating the upper face thereof against the sealing-rib 15. This p lfpvlslql l for ,the vertical moveinent of the shutter. also makes its oscillating movement easier, compensates for wear and inetjuali'tie's of fitting.

ter against the rib '15, I by preference provide the outer end of the shutter with a .liftin'g finger 23 which engages with a spring-finger 24 securedby screws 25 to the lower face of the plate 14, and shaped to act as a lifting-cam when the finger 23 rides up over it, whereby the outer end of the shutter islifted just before it comes to a stop and jammed against the lower face of the sealing-r1615. For the same purpose, I employ a corresponding lifting-finger 26 fastened by screws27 to the base 17 and arranged in po sition to lift theinner end of the shutter just before the same comes to a stop. The screws 25 and 27 pass upward through the base17 into theplate14, but this detail is immaterial. I V

For oscillating the shutter, I employ, as shown, a link 28 pivoted to it near its hub 11 and connected with the arm. 29 of a bellcrank lever fastened to the lower end of a rockshaft 30 the upper end of which is providedwith a lever .31 connected with the rear end of a horizontal link 32 the forward end of'whi chis pivoted to the inner end of an operating-rod or manual 33 passing through the lower end of the casing 34 of a timing mechanism and furnished at its projecting forwardpend with an operating-handle 35. Toprovlde for automatically shutting off the gas simultaneously with the closing of the draft-passages 4 and 6, the saidlink 32 is formed with a slot 36 receiving a couplingstud 37 carried by an arm 38 connected with the valve-plug 39 of a gas-cock 40 entered at one end by agas-supply pipe 41 and having its opposite end connected by an elbow 42 with a short nipple 43 entering a chambered bracket 44 depending from the base 17 to ,which it is fastened. The said bracket 44 is formed with a depending tapering trun- 45 the trunnion 45, and being held thereupon nion 45 upon which a yoke-like burner-carr er 46 turns as a swivel, the said burnerca'rrler havlng a tapered opening to receive by a screw 47. short nipple 48 mounted in the burner-carrier 46 enters a' mixingchamber 49 locatedat the outer end of an arm 50 of the preheater or burner 51 which is additionally supported by means of a heavy wire frame 52 held in place by lugs 53 upon the bottom of the burner, and having their outer ends fastened in the respec tive arms of the burner-carrier 46, one end of the wire being furnished with a handle 54 by means of which the burner is manually swung into its heating and lighting positions, it being necessary, or at least highly desirable, to adapt the burner to be swung to one s deaway from the food-containerinto thevop en air at the time of lighting it to avoid danger of explosion due to a possible accumulation of air and gas in the food-contamer The said bracket 44 is formed, as

is provided to offset this excess of movement.

To provide for closing the egress air-passage 6, in the cover 5, simultaneously, or substantially simultaneously with the closing of the ingress draft-passage 4-, the short arm 57 of the bell-crank lever aforesaid is connected with a rearwardly extending link 58 attached to the crank-arm 59 of a rock-shaft 60 ournaled in brackets 61, 62, upon the under face of the base 17. At its inner end, the said rock shaft 60 is provided with a liftingarm 63 engaging with the lower end of a vertically arranged lifting-rod 64 inclosed in a vertical tube 65 resting at its lower end upon the base 17. The pro ecting upper end of the rod 64 carries a yoke 66 receivingbetween its arms the outer end of a rockinglever 67 hung on a stud 68 in a bracket 69 fastened to the top of the cover The inner end of the lever 67 has mounted in it, the stem 70 of a suitable valve 71 closing the egress draft-passage 6 in the cover As shown, the stem 70 is provided with a knob 72. he said cover 5 is held in place upon the food-container 2 by pivotal clips 73 of any approved construction.

Instead of fastening the lifting-arm 63 directly to the rock-shaft 60, itis mounted loosely thereupon, and furnished with a stop-finger 63 co-acting with a corresponding stop-finger 63 formed upon a collar 63 fastened upon the shaft 60, the said fingers 63 and 63 being normally held in contact by a helical spring 63 encircling the shaft 60 and engaged at one end with the under face of the arm 63, and at the other end fastened to the shaft. The train of parts employed to close the valve 71 have a movement in excess of the movement required to merely seat it, this excess of movement being compensated for by the spring 63 which, as the movement of the parts passes the amount required to seat the valve, results in the separation of the stop- fingers 63 and 63*, leaving the valve 71 seated under the tension of the spring 63.

To provide for automatically closing the ingress and egress draft-passages 4 and 6 and for shutting off the fuel-supply at a predetermined time, I employ as herein shown, a timing apparatus which may, however, be replaced by any automatic means, such, for instance, as a thermostat. The timing-apparatus herein shown is constructed on the principle of the timing apparatus fully shown and described in my pending application filed August 1st, 1913, Serial No.

782,245, and therefore need not be detailed herein. ilhesaidtimingapparatus so far as hereinshown, isinclosed in axcasin '34 mounted upon theright hand cornerofzthe front of thebase 17 It is provided with a graduated timing-dial (Fig. 5) :sweptby :a pointer 75 at the:upperiendsofsa'setting lever .76.]1ung upon the projecting outer end of a center-arbor ,77 and provided .at 'its lower end with a handle .78. Thesaidarbor 77 carries .a timing-disk :80 having :radial timing-slot 81' receiving a timing-pin 82 moiuited in a itimingdever 83 hung .upona stud 84 and :furnished at its opposite end with a handle 85 projecting through asegmental slot 86 in the casing 34. The said timing-lever 83 is connected by a link 87 with a releasing-lever or :trigger 88 hung upon a :pivot 89, provided with .a forestalling handle 90 projecting through the casing '34, .and formed with a notch 91 which, as it were, shuts down into a trigger-notch 92 in the operating rod as shown in Fig. 7, so that the shoulder 93 of "the notch "92 i'nay be brought to a bearing upon :the adj acent face of the lever 88 which acts as a latch for holding the shutter in :its open position with respect to the ingress draft-passage 4, and the valve 71 in its open position with respect to the egress draft-passage 6, and

also acts to maintain the gas-cock in its open position. At the expiration of the time to which the timing apparatus has been set by means of the setting lever 76, a spring 94 lifts the timing-lever 83 through a distance represented by :the length of the slot 81, whereby the link 87 abruptly lifts the lever 88 out of engagement with the shoulder 93 of the rod 33 which-is now retracted by a helical spring 95, the outer end of the rod at this time moving through a bore 96 in the base 97 of the casing 34 as shown in Fig. 7.

As herein shown, the cylindrical food-com tainer 2, though normally locked upon the base 517, is adapted to be removed therefrom by its-provision at itslower end with locl ing-pins 98 which are entered into. inclined channels in the upper ends of retainlng-arms 99 cast integral with the plate 14.

Preferably I employ a thermostone 100 supported above the bottom of the food-compartment 3 upon steps 101 by means of which it is raised sufficiently not to interfere with the ingress draft. As shown, the thermostone 100 provides a mounting for a foodrack 102 provided at its upper end with a thermostone 103. Either or both of the thermostones may be employed as desired, or both may be dispensed with. The food rack 102 as shown, has handles 104.

In the modified construction shown by Figs. 8 to 10 inclusive, my invention is shown as applied to a cooking apparatus of the stationary oven type. As shown, a rec'- tangular double-walled insulated oven 105 on legs 106 is formed in its {bottom with an ingress"draft passage 107, and-in the middle of-itsupper-rear edge with'an egress draftpassage 108. The said passage 10? is closed and sealed by an oscillating and lifting shutter 109, *while the passage 10S is closed and sealed by a closure. in the form of a damper 110.

iFor the-operation of the ' shutter 109, 1 employ a link 1111 pivoted to it and at its opposite :end to an arm 112 on the lower end of a vertical rock-shaft 113 provided at its upper :end with an arm 114 connected by a link 115 with the reduced latch portion 1 16 of an operating-rod 1 17 entering thecasing 118 of-a timing mechanism o f any approved construction, the said latch portion 117 of 'the rod being provided with a setting-handle 119. The rock-shaft 113 is also provided with an arm 120 connected by a link 12 1 to a cranlearm 122 at the upper end of the valve-plug 123 of a gas-cock 124 entered ibya. gas-pipe 125 connected by an elbow126 anda T-connection 127 with agassupply pipe 128. At its opposite end, the gas-cock 124 is attached to an elbow 129 connected by a. nipple 130 with a fitting 131 formed with a tapering-trunnion 132 on which the burner-carrier 133 is swiveled, the details of the gas-passages in the "trunnion and carrier being the same as already described. The said burner-carrier 133 carries a short nipple 134 entering a. mixingchamber 1 -35 at the outer end of a burnera-rm 136 the inner end of which terminates in the burner or preheater 137 which is in part supported by a heavy wire frame 138 the inner ends of which pass through the rm-s of the said burner-carrier, one end of the wire ibein-g extended to form the handle 129. The shutter 109 .is provided with a helical spring 140'by means of which it is swung into its closed position. The same means may be employed for lifting the shutter 1 09 as already shown and described. For the closure of the egress draft-passage 108, the link 115 is furnished with a swiveled head 141 connected by a long rod 142 v with an arm 143 upon a rock-shaft 144 adapted toraise the'damper or closure 110.

\Vithout going further into details, it will be understood that in the modified or oven form of my apparatus, the ingress and egress draft-passages and the gas-cock are simultaneously operated at the expiration of av predetermined time for the sealing of the oven, the ingress draft-passage being sealed by means of a shutter interposed between the said passage and a preheater located on the outside of the oven.

The two forms of apparatus are, however, substantially the same and operate on the same principle. The details of this construction'may, of course, be widely varied without departing from my invention. The

ing a vent-passage 156.

modified form of my improved apparatus [as shown in Figs. 8 to 10' inclusive is not shown as furnished wlth thermostones,'but

it may befurnished with either, the upper or thelower, or both upper and lower thermostones as shown for the apparatus of the preceding figures. Y

By preference, thoughnot necessarily, the valve 71 employed {for the closure of the egress draft-passage 6' (Fig. 1) is provided with a relief-valve to permit the escape of steam rising from the food. As shown in Fig. 11. this relief-valve comprises a ballvalve 14 5 held in place bya plate 146 having-a seat 1&7 and a vent 14:8, The ball 145 is located in a valve-chamber 149 opening into a vent passage 150 in the valve-stem 70. The relief-valve shown in Figs. 10 and: 12 consists of a threaded nipple 151 mounted in the damper 110 and having a relief-passage 152 opening into a valvechamber 153 containing a ball-valve 154.

supported by a cup 155 screwed upon the projecting lower end of the-nipple and hav- The two reliefvalves shown by Figs. 11 and 12 may, of course, be replaced by relief-valves of different character and construction, and may be omitted altogether if desired.

1. In a cooking apparatus, the combination with a itood-compartment having an ingress draft-passage, of a. heater, a closure interposed between the said passage and heaterand having movement in one direction for closing the said passage, and movev ingress draft-passage, or a heater, a closure interposed between the. said passage and heater and movable in one planefor closing the said passage and in a'plane at a right angle ;to its closing movement forsealing the said passage, cocking means for maintaining the closure in its open position,

means for automatically releasing the cocking means to permit the closure to close, means for moving the closure intoits closed and sealing position, and means for manually opening the said closure and for setting the said cocking means subject to the action of the said releasing means.

3. In a" cooking apparatus, the combina tlon with a food-compartment having a heat ingress passage, of a heater movable into heating and. lighting positions with respect to the said passage, a closure interposed between the heater and passage for closing the latter, means for automatically controlling the closing movement of the said closure, and means for manually opening the said closure to permit the use of the heater in heating the compartment.

at. In a cooking apparatus, the combination with a food compartment having an ingress draft-passage, of a heater, a closure interposed between the said passage and heater and having swinging and right line movement, cocking means for .maintaining the closure in its open position, means for automatically releasing the said cocking means to permit it to swing into its closed position, and means for manually opening the said closure and setting the said cocking means subject to the releasing action of thesaid automatic releasing means.

5. In a cooking apparatus, the combination with a food compartment having an ingress draft-passage, of a heater, a closure interposed between the said passage and heater and having closing movement in one plane and sealing movement in another plane, cocking means for maintaining the said closure in its open position, means for automatically releasing the cocking means to permit the closing of the closure, means for manually opening the said closure and setting the said cocking means Subject to the action of the said automatic rel easing means,

and a .fuehvalve for the heater adapted to be manually opened, and to be automatically controlled in being closed to accord with the closing of the said closure.

6. In a cooking apparatus, the combina tion with a food compartment having an ingress draft-passage and an'egress draftpassage, of a heater, a closure interposed between the said ingress draft-passage and the heater, and having closing movement in one direction and sealing movement in another direction, cocking means for maintaining the closure in its open position, means for automatically releasing the said cocking means to permit the closure to close, and means for manually opening the said closure and setting the cooking means subject to the releasing action of the said automatic releasing means.

7. In a cooking apparatus, the combination with a food compartment having an ingress draftpassage, of a heater, a closure interposed between the said passage and heater and having swinging movement in the plane of the passage for closing the same, and right line movement to the plane of the passage for sealing the same, cocking means for maintaining the closure in its open position, means for automatically releasing the said cocking means to permit the closing and sealing movements of the closure, and means for manually opening the said closure and setting the said cockmg means subJect to the releaslng action of the said automatic sealing means.

8. In a cooking apparatus, the combination with a food-compartment having a heat-ingress passage, of a heater, a closure interposed between the said passage and heater, cam mechanism for moving the closure against the said passage at the end of its closing movement, means for automatically controlling the closing movement of the said closure, and means for manually opening the closure to permit the use of the heater for heating the food-compartment.

9. In a cooking apparatus, the combination with a food compartment having an ingress draft-passage and an egress draftpassage, ot' a heater, a closure interposed between the said heater and ingress draftpassage and having movement in one direction for closing the said passage and movement in another direction for sealing the same, a closure for the egress draft-passage, cocking means for maintaining the said closures in their open positions, means for automatically releasing the cooking means to permit the closing of the said closures, means for manually opening the said closures and setting the said cocking means subject to the action of the automatic releasing means,

and a gas-valve automatically controlled in closing by the said releasing means and adapted to be manually opened.

10. In a cooking apparatus, the combination with a food compartment having an ingress draft-passage, of a heater, a closure interposed between the said passage and heater and having movement in one direction for closing the said passage and movement in another direction for sealing the same, cocking means for maintaining the closure in its open position, means for automatically releasing the said cocking means to permit the closure to close, means for manually opening the said closure and set- ,ting the cooking means subject to the action of the said releasing means, and a fuel-valve automatically controlled in being closed to accord with the closing of the said closure and adapted to be manually opened after the setting of the said cocking means.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ROSS M. G. PHILLIPS.

Witnesses:

CLARA L. WEED, HAROLD D. PEARSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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