US820025A

US820025A - Electric dental furnace.

Info

Publication number: US820025A
Application number: US26178305A
Authority: US
Inventors: Daniel G Steinecke; Samuel Steinecke; William Steinecke
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-05-23
Filing date: 1905-05-23
Publication date: 1906-05-08
Anticipated expiration: 1923-05-08

Description

PATBNTBD MAY 8, 1906.

1). G. STEINEOKE, DEGD.

S. & W. STEINEGKB, ADMINISTRATORS.

ELECTRIC DENT-AL FURNACE;

APPLICATION FILED MAY 23, 1905.

' 2 SHEETS-SHEET 1.

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ATTORNEYS A I INVE/V T03 Jamel (2}. zeznecl e 2 SHEETSSHBBT 2.

PATENTED MAY 8, 1906 NOE 820,025.

D. G. STEINEOKE, DEOD.

F3. l}: W. STEINEGKE, ADMINISTRATORS.

ELECTRIC DENTAL FURNACE.

APPLIQATION FILED MAY 23, 1905- fi gi/z z/v f 34 .51 yJZZfi /L I DANIEL G. STEINECKE, OF NEW YORK, .N. Y.; SAMUEL STEINECKE AND A UNITED STATES PATENT OFFICE.

WILLIAM STEINECKE- ADMINISTRATORS OF SAID DANIEL G. STEIN- ECKE, DECEASED.

ELECTRIC DENTAL FURNACE.

Specification of Letters Patent.

Patented May 8, 1906.

Application filed May 23,1905. Serial No- 26l,783;

'a citizen. of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Electric Dental Furnaces, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to electric dental furnaces, and is an improvement on that specifically known as the Hammond electric furnace; and the object of this invention is to provide a dental furnace, as hereinafter described andclaimed, in which porcelain inlays or dental work of otherkinds and classes may be brought to a high degree of tempera ture for baking or, other similar purposes, a further object being to provide an electric furnace of this class in which the muffle is composed of two parts and is readily detachable from the furnace proper, and a still further object being to provide a mulfleforfurnaces of this class the two parts of which may be electrically energized singly or together. The invention is fully disclosed in the following specification, which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which- D Figure l is a front elevation of an electric dental furnace constructed according to my invention; .Fig. 2, a plan view thereof on the line 2 2 of Fig. 1 and showing diagrammatically a method of electrical connection; Fig. 3, a partial section oh the line 3 3 of ,Fig. 1 and showing the mechanical construction of my muffle; Fig; 4,a section of the furnace proper, taken on the line 4 4. of Fig. 3; Fig. 5, a view similar to Fig. 4, but taken on theline 5 5 of Fig. 3 and Fig. 6;.a detail view of the muflie which I employ v i 1 In the drawings formingpart ofthis speci fication I have shown a casing (7;,provided with a non-conductive top I), said top being composed of slate, marble, or other similar and suitable material, and mounted on the top I) and at one side thereof is a furnace casing c, which is secured to the top I) by able-manner.

Pivotally mounted on the top shown at b is a rheostat-arm 5 adapted to means of screws, bolts, or in any other suit-v and as engage one of a plurality of contacts bf, connected in the usual manner by means of resistance-coils, said resistance-coils bein shown at b in Fig. l and being indicated diagrammatically at b in Fig. 2 and adjacent to the rheostat-arm b is a knife-switch 11 which is in permanent communication with a binding-post b to which one Wire of a main electric circuit is adapted to be connected, and the spring-contactsof the knife-switch are in electrical communication with the rheostatarm 6 through the resistance by means of an electrical conductor 1)".

The furnace 0 comprises two vertical members c and'c which are connected with each other by means of a horizontal casing 0, open at its top, and resting-in the upper open end of the casing c is a cylinder 0 which is filled with refractory material, as shown at c, said cylinder 0", as well as the material 0 therein, extending entirely from one member 0 to the other member 0 of the furnace, and the refrac'tory material, as shown at c, is of the form known as fire-brick and closely engages the cylinder 0 at the ends thereof; but in practice I prefer to provide an air-space 0 between the cylinder 0 and the fire-brickc,

. vided with an opening e, which registers with the opening 0 in the fire-brick c, and said opening (3 is adapted to be closed by means of a pivoted cover 6 provided with a peep-hole e, and said pivoted cover 6 when in a closed position, rests on a shelf 6 formed -on the front member 0 of the furnace, and by meansof this construction it will be seenthat the mufHe a may be withdrawn from the opening 0 through the opening 6 whenever desired.

"The mufile d, asclearly shown inv Fig. 6, is comprised of an upper member (1 and a lower member (1 the lower edges of the segmentally-formed upper member (1 being formed to engage the upper edges of the horizontallyranging member (Z and the members 01 and d of themufiied are each provided with inof ll rods g ,,mouiitcd then shown diagrammatically the electrical con 2 scopes dependent windings of conductive material, through. the hottoiii memb as shown at d and (1 respectively, the ends (1, and member is accord igly heated.

of the Winding (I being provided With. tcr- Ininzil plates d and (i7, and the ends-of the Winding {Z being provided with terminal plates d and d, as clearly shown. in Figs. 4 and 5.

Adjacent to and adapted to make contact with. the terminal plates d and d", as shown in Fig. 4, is terminal plate 6 which is con nectcd to a contact e, secured in the firehrick c by means of an; electrical conductor 6 and mounted in the filtFllIlGli c at points adapted to make contact with the terminal plates (Z and d" are tcrininsl piste-s e and a, which are in. elect cal connection with contsictsf and. hy n'iccns of elect coi1- ductors f and 5;", respectively, and the co11- teats e, 7, sndf are i: ated from. the cg linder 0, in which they are mounted, by means of the fire-hricl-z or refractory i'nctcrisl c, and it Willhe by :nczms of this construction that when the motile d is 'tion for use the torwerd terminals of are both in elm contact a, Whereas the rearward terminals wini'lings {1}? in electrical comimion. with innlopsndent contacts, respec tivcly.

Mounted on the top I) of the casing a and. possingthrrmgh the casing 0 ot the furnace c are three tithes g, (1 ind g, in each of which is a rod g", which nsulated from the tubes g, 9 and c, cleci'hr shown in the drawings, and the rods 9 are each pro ided. with contacts at their nppei .nds, the contacts 9 of the rod g in the t he ginnlzing electrical connection with the c-x i act (2, whereas the con-- tacts g of the rod: g i the tubes 9 and g are in electrical connection with the contacts f and f .rcscccti 01y, Wl'ienthccylinder c is in position.

in Fig. 2 ot the drawings 1 have shown the tubes g, 5 and g inv section, as Well the in, and I have also nections oi the parts justdcscrihcd, and also in electrical co ninunice-lion. with the contactg of tho tuhcv 5 a switch lzgwhich is sdsptod to make elect ical connection with the con tact g of the tube by means of a. terminal it, and. the switch it is in communication. with a. hinding-post h" by means of an electrical conductor hi, and said. himlingqiost serves as the electrical connection for the other Wire of the main electric circuit, and it will-ho seen that when the parts are in the positions shown in. Fig. 2 the current from the binding-post b tln'ough the knife-snitch b rheostat and rheostet-orm 1)", rod. 9' of the tube g through the Winding (Z to the contact 9 of the tube (7 and thence to the switch 1 through the electrical conductor hto the hinclinsspost h and the circuit is completed.

When the switch it is moved to the left into engagement with the terminal 72?, the current passes as just described and also passes through the winding (1 to the contact 9 of the tube g and thence to the terminal 71 and through the switch i and. to the binding-post h, End the upper member 61* of the muttlc is thereby heated, and it will he that the switch. 7: therefor controls the energizing of the winding d of the upper member a"? of the motile, it being frequc itly nec ssary or advisable in the making of porcelain inlays to have all the hea t at the bottom thereof, but none shove the same, as it is been found that better results are prod v in this manner than when both the upper and lower surfaces of thejmut'llcs heated.

t will also be seen that the .nmiile (Z nniy he removed from the l'ie hri k c at any time for s :hstitution or rsnsir, eno. it tln- Wiring; at any time should nrojoot through the inner surface of the muthc all that. is necessary is to remove the some, separate the mcmhvrs other changes in and modifications of the construction herein. described may be made Without clepeitine' tr 1). the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim new, and desire to sccurc h Lev ters Patent, is

1. In a furnace, at base having electric contacts forming terminals of en electric oircuit, standards secured to the hose, :1 casing oven at its top hctwccn said standards, a meta. cylinder resting in the open end of said casing, said cylinder being filled with retractory material snd said refractory material bein" provided with a central opening, a mu .e in said central opening and an electric heating-circuit inthe Walls of said motile and terminating in electric contacts to complete the circuit with. the source of clectricity of melting electrical connection with the said electric contsc s of the case, SLlJStQ. s ly as shown and describcd.

2. In a furnace of the class. described, a base, contacts forming terminals 09 an electric circuit on said. base, vertical standards on said lasso, a casing o enst its to and conmeeting said stands]: s, an oven 0 refractory material res sing in the open end of said citsing an electric hee.ti1 1g-circuit arranged in said oven and in. electrical cornmunicetion with said. lncls of said. electric circa-Fit, suhstcntiolly own and. described.

d of the muffle 6 3. In a furnace, a base, vertica "standards secured thereto, a casing open at its-top and V connectingsaid standards, acylinder filled with refractorymaterial resting in the open top ofbaidpasing, said refractory material being provided with a central segmental opening, a mufiie detachably mountedinsaid opening, said mufiie being composed of an upper and lower member, an electric heatingcircuit arranged in the walls of said upper member, an electric heating-circuit arranged in the walls of said lower member, and means for energizing said electric heating-circuits,

' substantially as show'hand described.

4. In a furnace, abase, vertical standards secured thereto, a casing open at its .top and connecting said standards, a cylinder filled with refractory material resting in the open top of said casing, said refractory material being provided with a central segmental opening, a muffle detachably mounted in said opening, saidmufile-being composed of an upper and lower member, an electric heatingcircuit arranged in the walls of said upper member, an electric heating-circuit arranged in the walls of said lower member, and means for energizing said electric heating-circuits independently of each other, substantially as shown and described.

5. A heater, comprising a muflie composed of two detachably-connected parts, an electric heatin -circuit in the Walls of one of said parts, an ectric heating-circuit in the walls of the other of said parts, and means for energizing said circuits independently of .each

other, substantially as shown and described.

6. In a furnace, amufiie composed of an upper and lower member, an electric heatingcircuitarranged in the'walls of the upper of said members, an electric heating-circuit formed in the walls of the lower of said members, the terminals of said electric heatingcircuits being connected at one end "and being provided with independent contacts at the 8. An electric heating-furnace provided with a mufile composed of separatedetachable top and-bottom parts, having-independ-l ent circuits, substantially as shown and de scribed.

9. An" electric heatingiurnace with a mufie com osed of top an parts, and means or heating either orboth of said parts separately, substantially as shown and described.

rovided bottom In testimony that I claim' the foregoing as I my invention I have signed my name, in pres' ence of the subscribing witnesses this 18th day ofMay, 1905.

DANIEL G. STEINECKE Witnesses:

F. A. STEWART, O. J. KLEIN.