US1037573A - Electric heater. - Google Patents

Description

U. H, ALLEN.

ELECTRIC HEATER.

APPLICATION FILED MAY ze, 1911.

NVENTOR EN /N Patented Sept. 3, 1912.

A ltornejy UNITED sTATEs PaTENT oEEioE.

CHARLES H. ALLEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO TROY LAUNDRY MACHINERY COMPANY, LIMITED. OF CHICAGO, ILLINOIS7 A CORPORATION OF NEW YORK.

ELECTRIC HEATER.

and more particularly' to :electric heaters adapted to be used in connection with laun dry machinery and is herein shown installed within an ironing roll, the main object of` they invention being to provide a heater which is so constructed that greatheat will be produced with -acomparative low voltave.

t:Another object of the invention is to provide a heater which is so constructed thaty the same can be stationarily mounted withlina rotary ironing machine, thereby overcoming the diiiiculties now existing with electric heaters which have been heretofore used in connection with ironing machines.

A further object of the -invention is to provide an electric heater having a body formed of -soap-stone or any other suitable insulating material, in the periphery of which is embedded a' heating coil which7 -when thrown into the circuit of'a current, will heat the entire length of the body toa uniform temperature in order to thoroughly heat the ironing roll in-which the heater is placed.

A still further object of the invention is to provide novel means' for securing the lead and return wires to the heater proper whereby the heating coil will be in direct circuit with 'the source of suppl Another object of the invention is to provde novel means for centering and holding the heater within the ironing roll-whereby the roll will rotate freelyy around the heater upon suitable' bearings.

-Other and further 'objects and adi'antages of the invention will be hereinafter set forth andthe novel features thereof defined by the appended claims.

'In the drawings-Figure 1 is a longitudinal section through the end portion of an ironing roll showing the application .of myimproved heater thereto; Fig. 2 vis a Specification of Letters Patent.

`Application filed May 26, 1911.

Patented Sept. 3, 1912.4

Serial No. 629,550.

longitudinal vertical section. throughjthe ironing roll and heater, the end portions of the roll being 'broken away;'Fig.j 3is atop plan view of the heater detached, partly broken away; and Fig. 4 is a section taken on line 4-4 of Fig. 3.

Like numerals of reference refer to like parts in the several ligures of the drawings.

In the drawing# indicates an ironing rolly of any suitable.construction, but is herein shown having open ends in which are secured heads 2 having bearing sleeves 3 which are mounted in suitable bearings 4 formed in the standards 5 of theframe of themachine. The roll is so mounted lthat it rotates freely in the Ybearings and `at ,one end, as shown,fis provided with a gear @for -rotating the same. The heads 2 which are arranged at each end are secured in position by set-screws 7 in order to allow the heads to be detached or attached so as to place within the same heater 8 which is the essenf tial part of my invention and which will be later fully described.

The heater8 comprises a tubular core 9 formed of any suitable met-al havingl its inner face covered by insulation 10 of asbestos and said core is adapted-to be loosely ymounted within the bearing sleeves 3 of the heads 2 and lat one end extends,y outwardly' as shown. The core 9 is provided with, longitudinal slots 11 and 12 adapted to register with cut out portions 13 and 14 formed in the annular body 15 which fits snuglyon the core and is preferably formed of soap-stone but may beformed of any other suitable-insulating material. The periphery of. the body 15 is provided with a spiral groove 16 iny which is embedded a resistance oi` heating wire 17 vwhich is wound therein toforln a coil1 and is preferably formed of tungsten stee The body l5A is provided with longi- -tudinal bores 1 8 in l,alinement with each other-extending thereinffroxn each end in `which are mounted connecting plugs 20 and 21 tao-which the respective ends of the heat ing coil formed bythe wire 17 are connected by binding posts 22, the ends of saidwire passin through slots formed in thebody. The p ugs are also. provided with -bindin posts 23 at their ends to which are connected the ends of leadand return wires 24 and 25 eter of the` groove 1n which it is seated in order to allow the saine to expand.

The plugs 20 and 21 are held in position. by keys 26 which are forced into position by head plates 27 having their inner faces lined with asbestos as shown at 28 and said head plates are forced against the end of the body and locked by set nuts 29 mounted on the threaded portions 30 of the core 9. By this construction, the keys and plugs can be readily detached by removing the head plates.

ln order to allow the ironing roll to ron tate freely around the heater and at the same time to hold the heater centrally therein, l provide the ironing roll l with rings 31 carrying ball races 32 which co-act with'4 balls 33 carried by ball races 34- mounted upon the core of the heater asclearly shown, said rings being'secured in position by set screws 35 in order to allow the same to be detached to install the heater therein.

From the foregoing description, it will be seen that l have provided an electric heater comprising a body of insulating material having a spiral groove formed in its periphery in which is seated a heating and resistance coil. 1t will also be seen vthat the ends of the heating coil are connected to plugs 'mounted in the body to which the lead and return wires are connected, leadu ing .from any suitable. source of supply, whereby the coil, when thrown into the circuit ot a current having a comparativelyl low potential, will become lheated in the well known manner which, in turn, will heat the body to a uniform temperature throughout its length so as to give out the greatest amount ot heat possible in order to thoroughly heat the ironing roll.

Having described my invention and set forth its merits what l claim and desire to secure by Letters Patent is'- 1. lin electric heater comprisingV a tubular core, a bodyol insulating material ar ranged on said coreyconnecting plugs detachably mounted in the opposite ends of said bodya heating coil arranged around said body, la lead wire connected to one oi:l said plugs, a return wire connected to the other oit said plugs, said wires passing through the tubular core, and means for securing said plugs in position within said body.

2. An electric heater having a central tubular core provided with an insulated inner face, said core having slots formed therein, av body of insulating material arranged over said core having slots registerinsurers ing with the slots of said core and provided. with plug sockets in communication with said slots, said body having a spiral groove inf its periphery, detachable connecting plugs arranged in said sockets, a heating coil arranged in said spiral groove having its ends connected to said plugs, and' a lead wire and a' return wire extending into said core from one end thereof and connected respectively to said connecting plugs.

3. An electric heater comprisingatubular core having an insulated inner faceand provided wit-h longitudinal slots and threaded portions, an annular body arranged on said core having a spiral groove in its periphery, said body being provided with plug sockets, connecting plugs arranged within said sockets, a lead wire lconnected to one of said plugs and a return wire connected to the other plug, said :wires extending through the slots of said core, and a heating coil ar ranged' within the groove of' said body having its ends connected respectively to the plugs.

4. An electric heater comprising a tubular core having an annular body provided with a spiral groove in its periphery, said.

body being provided with plug sockets coinrnunicating with slots formed in said body, a heating'coil'seated in said groove, plugs mounted in said sockets connected to the ends of said coil, lead and return wires connected respectively to said plugs, keys engaging said plugs, and head plates carried by said corey having insulated inner faces engaging the ends of said body and said keys.

5. An electric heater comprising a tubular core having an annular bodyarranged thereon termed of insulating material, a heating` coil arranged on said body. con- 'nectinn` plugs mounted in the ends of said body connectedl to said coil. said connecting plugs being connected respectivelyeto a lead and a return wire. keys engaging said plugs. said core having threaded portions. and head plates arranged on the ends of said body and secured in position thereon b vnuts mounted Aon the threadedportions of said core.

6. An electric heater comprising a tubular core having threaded end portions, an annular body arranged on said core provided with a spiral groove in its periphery, a heating coil arranged on said body in said groove, connecting plugsmounted 'in said body connected to the respective ends of said coil, lead and return wires connected respectively to said connecting plugs, head 'plates arranged on said corey against said body, and nuts mounted on the threaded portions of said core engaging said head plates.

7. An electric heater comprising a tubular core having an insulated inner face, an

annular body provided with spiral grooves In testimony whereof I aiix my signature arranged on'said core, said body and core in presence of two witnesses. bein provided with communicating s1ots,a heating coil seated in said grooves, and lead y CHARLES H' ALLEN' 5 and return Wires extending through the slots vWitnesses:

of said body and core and connected to the J. HOERMANN, respective ends of said coil. WM. KROGMAN.

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