US1615464A - Electric sadiron - Google Patents

Description

Jan. 25, 1927.

y@ INVENTQR BY l,@J'roRNIaY Patented Jan. 25, 1927.

UNITED STATES JOHN E. HASDEN, I' PHILADELPHIA, PENNSYLVANIA.

ELECTRIC SADIRON.

' appiieatam mea september 24, im. seriei ne. sans.

l1`his invention relates to electric sadirons i and more particularly to devices of that naregulated.

ture having automatic means for regulating the temperature of the iron.

Among the objects of this invent-ion lis-to vprovide an electric sadiron or the like comprising atliermostat arranged to o erate 1n conjunction with means for contro ling the -ow of current to the heating coil whereby the temperature of the iron is automatically Anotherobject of this inventionis to provide an electric sadiron or the like comprising a shoe arran ed for normal co-operation with the iron an in such manner that the ex- )ansibility of the body of the iron is utilized i or retaining the shoe tautl when the iron is the shoe and other'i heated up and thus reventing warping of l 1l) effects.

*Another ob'ect of the invention is to provide an electric sadiron having a body comprising a mass of heat conducting material arranged yto give` weight to the sadiron, a

layer of insulation extending along said body and arranged to contain devices for controllin the low of current to the heating coil o the sadiron, a shell being provide for the outside of the iron, and novel fasteners co-operating to retain the different parts of the iron in engagement with each other and to revent any strain from going upon the insu ating material.

Still another object of this invention is to provide an electric sadiron which comprises a heating, coil and automatic means for controlling the flow of current theretofdepend-` ing upon the predetermined desired .temperature of the iron, the v,various parts of the .iron being especially arranged to permit of rapid assembla of manufacture at low cost, and

4to rovi e particularly a sadiron which is foo -proof in operation and Iis adapted for long and continuous use.

With the foregoing and other objects in view the invention consists in the arrangement and combination of partsy hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accom anying drawings inwhich like lreference c aracters designate the same parts in the several views, and in whichn Fi re .1 is a vertical section of the sadiron s owing the operating mechanism therein, approximately on the line 1-1 of Fig. 2. Fig. 2 is a section approximately on the line 2-2 of Fig. 1. 1 Fig. 3 is a section on the line 3-3 of 1I Fig. 4 is an end lview of the interior structure of the iron and showing a step in the assemblage thereof.

Fig. 5 is a diagram of the circuit. Fig. 6 is a plan view showing the heating coi Fig. 7 is a section on the line 7-7 of Fig. 6. Referrin' now more specifically to the drawings show my invention as comprising a sadiron having a shoe 10 of relatively thin `material and a mass of heat conducting material 11 extending alon the iron to which the shoe is secured 1n any suitable lma-nner. Thelayer of iron 1'1 is provided layer as by meansof a screw 14, the thermoy v stat being arranged to lie preferably directly adjacent to the shoe so as to be readily responsive to the temperature thereof.

. The body 11 is formed with novel engaging means extending along the outside thereof near the bottom of the iron, the shoe 10 having engagement with said means in such mannervas to lie snugly along the iron. To provide for simplicity of construction said engaging means takes preferably the form of a projection 15 extending continuously around the iron, the shoe 10 being beaded to en age over said projection whereby a neat an rigid fastening is provided for.Y While the block 11 may be formed of any suitable metal -i't is preferably made of cast iron 'while the shoe 10 is composed of a metal of such a heat conductivity with relation to the heat conductivity of the member 11 that the than that of the shoe and will operate to prevent war in1 thereof and to retain the same in er ect y smooth flat condition. A shell 16 1s provided to inclose the sadiron, said shell being formed of relatively thin material and of any suitable metal, novel fastening means being provided operative between the base portion of the iron such as the member 11 and the top portion of said shcll so as to secure said shell in 'fixed relation tcrthe iron and in spaced position'relatively thereto to prevent said shell from being subjected to any undue stress, said fastening means having preferably engagement dlrectly with a handle 17 whereby the weight of the member 11 is borne directlv by the handle. More specifically. said fastening means includes a bolt 18 which is threaded into the member 11. said bolt extending continuously upward through the shell and into engagement with said handlel as by means ofA the nuts 181. suitable spacing means being provided such as the sleeves 19 for the purpose setfort-h hereinber'ore.

'lo provide for'additional heat capacity of the iron, l use a member 20 formed of metal and extending along the member 11, a heating coil 21 being positioned directly between said members. The member 20 is provided with holes 22 through which the bolts 18 pass freely, nuts 23 being screwed down upon the bolts after the same have been -said insulating means being ,threaded into the base member 11 so as to retain saidmembers in rigid engagement with each other and the heating coil in eiiicient heat conducting relation to said members. The spacin sleeve 19 which is mounted upon said bei has abutment against the upper part of the nut 23 and against a re-enforcement or anchor member 24 provided upon the shell 16 and through which the bolt is 4arranged to pass into engagement with the handle. fit will -be seen that this arrange ment provides particularly for a sadiron having suitable mass and weight and arranged to be neatly and rigidly secured togetherio prevent undue strain of any part of the iron and thus eliminate the possibility of any parts of the interior becoming loose and causing dissatisfaction.

'insulating means 25 is provided within` the shell 16 extending along the layer 20, so arranged as to contain a suitable make and break mechanism which controls the flow of current to the heating coil. Thus it will be seenA that the layer is hollowed out to provide a. chamber 26, and receives a make and break contact mechanism including av spring 27 and a bracket 28, the spring and bracket being mounted in any suitable manner as upon the insulation, novel contact vmeans being prov1ded borne by said springend said bracket,

' the contacting face 29 of said contact means being inclined at an angle to the direction of movement of the spring so as to give an e'ective wiping contact and insure a proper and effective electrical action. Means 1s provided to render the operation of the thermostat-effective to said make and break con; tact, said' means taking the form of a. pin

30 which extends through the members 11 and 20 and is arranged slidably therein and for direct abutment as between the spring and the thermostat.v Thus it will be seen from Fig.' 5 that when the iron is heated up and the thermostat operates the pin bccomes effective for breaking the contact. The pin 30 is constructed preferably of square cross section while holes 31 through which it is arranged to pass are of round formation. thus minimizing the frictional vcontact between the pin and the surroundmember 20 has a cut out 35 at the rear of' theiron to facilitate the fastening of the coil to the conductor 34. A conductor 36 is provided likewise having contact with the bracket 28 and extending into engagement with a contact bar 37 of the socket connection 38.

Said socket connection comprises a pluralit7 of the contact pins 37 which arepositioned in spaced relation to each other and are suitably insulated as by means of plates of insulation 39 and by means of the insulation sleeves 40. A bracket 41 is provided to support said socket, said bracket being secured directly to the member 20 as by means of screws 42. The socket comprises a shell 43 while contact pins 37 are formed withthe integral nuts 44 so that thesocket may be assembled directly by u a wrench upon the nuts 44, the lower ends o said pins being threaded to engage into the nuts 44", thus securing the parts of the electrical socket in connection with each other and to the electric conducting members and in position upon the bracket 41.

The method of assemblage of the iron as thus far described may be seen by observing Fig. 4 whichY shows the shoe fastened upon the member 11 while the member 20 is secured down by means of thebolts 23, the socket bein likewiseA fastened in position. It will nowe necessary merel to fasten the make and break mechanism into the layer of insulation and to position the same upon the iron, and finally to slip the shell 16 into l osition and fasten the handle 17 in place y means of the nuts 18".

The heating coil 21 is constructed in a novel manner, ther` winding being formed of wire 45-of iiat cross sectionQwound uponra 'supporting member 46 which may be comthe wire back by means of a bend as lshownatflt'l toward the crotch of the U and then continuing the winding along the other side of the U inembcr toward the end thereof. An insulating plate 4) is inserted beneath the portion 4b to insulate the same from the rest. ot' the winding.. 'lt willthus be seen that the heating coil ,is particularly adapted for compact construction and that extensive wear or cutting action upon the mica plates 4o and 5() is prevented inasmuch as the wire is disposed with the larger sides thereof extending along said platcs'so that thc bearing action of the members l1 and 20 upon the heating coil tending to conipress the mica plates against the wire will be eliminated.

It will be seen that the shoe'l() constitutes what is in effect a veneer for the sadiron covering the relatively rough surface of the cast iron block 11. Machining or finishing of any kind is eliminated. Moreover, said shoe is made of rustless, stainless. metal and can be highly olished and in general worked more satisfactorily than the block ,11 could be.

The handle 17 is spaced from the shell 16 of the sadiron by means of the washers 24 to provide an air space to retain the handle iii as cool condition as ossible.

The projecting -ortion 15 provides a sadiron which is particularly facilitated for the ironing of frills, rutlles and the like where the edge portion of the iron must be'used. Vhile the projecting member extends wholly about the iron to simplify the construction it will be understood that my invention contemplates any specific arrangement` of this member in regard to size'or position as may be desired.

The insulation member 25 will be understood as having suitable strengthening materia-l to atord the necessar strength thereto. Said block of insulating material is provided with cutouts 51 and holes 52 to receive the bracket 41 and the heads of the screws 42 res ctively, the latter being directly accessi le through said holes as by mea-nsof a screw driver for en-4 gaging thebracket to the block 20 if desired.l The invention contemplates preferably a factoryfadiustment for the switch mecha-v nism, the p m 30 being altered length until rigidity and the test condition is-met. The pin is readily tiled down or otherwise shortened for this purpose. The make and break contact de#- vice being positioned in the chamber 26 within the insulation block is. retained under uniform (perating conditions and against disturbance ue to changes in the ,atmosphei'e, such as an increase in humidity which would promote arcing across the contacts, or an increase in circulation of the air about the iron which would cool the upper part thereof more rapidly and change the expansion and relative position of the partsot` the make and break contact device, thus altering the gap between the contacts and consequently the adjustment ot said device relative to the thermostat.

The liet form of the wire used in the heating coil possesses numerous advantages in that an increase in heating efficiency of the coil is obtained since a greater surface for the transmission of the heat of the coil to the case iron blocks is provided for. The excessive drop in the temperature as between tlie heating coil and the body of Ithe iron is thus eliminated, permittingthe coil to be operated at somewhat lower temperaeating coil is thus obtaine While any type of connection can be used at the heating coil, I use preferably an angle member 53 connected to said coil by means of a bolt 54 and to the socket by the nut 44. Likewise an angle ,member 55 is used with bolts 56 and 57, the former to connect with the heating coil and the latter with the conductor 34.

I claim:

1. In an electriesadiron, the combination of a body, an electric heating coil, a thermostat, and make and break contact means in the body co-operative with said thermostat to re ulate the flow of current to said coil said gbody comprising insulation serving to enclose said make and break contact means to make the same more uniformly res onsive to the heat .of said coil, the make an break contact means including aspring contact member.

2. In an electric sadiron, the combination of a body having a mass of heat conducting matrial at the base oithe iron, and a layer of insulation along the top of the iron, a shell 4enclosing said body, fasteners having engagement with said mass of heat conducting material, spacing sleeves surrounding said fasteners to retain the shell in s aced predetermined relation to said mass o heat conducting material and prevent said layer of insulation from being subjected to stress, the upper end of said fasteners extending through said shell, and a handle secured to said ends. i Y y 3. In a sadiron, the combination of a body ture of the iron. A loncgerl life of the lll() llu of relatively strong rigid material having an engaging portion extending along the sides .of the iron near the base thereof, and a shoe of relatively thin sheet material `for the iron having engagement with said engaging portion and whereby the shoe is retained in taut condition 'along the body.

4. lhe combination as Set forth in claim 3 wherein said shoe is composed of a metal having a lower expansibility under heat than said body.

5. A sadiron comprising a. block of rigid heat conducting material, and a sllo'e having engagement with the block, said shoe being made of stainless metal covering the outside i of said block and constituting a veneer, said shoe having engagement with the block around the side surfaces thereof and/having a lower co-ellicient of lexpansion than the block to grip the same snugly when the iron is heated up.

6. In a sadiron, the combination of a body of relatively strong rigid material having a flange portion extending along the sides of the iron near the base thereof, and a shoe of relatively thin sheet material of a. lower the engagement of the anges as aforesa1d serving to retain the shoe in engagement with the bodyv as when the iron is cooled and the body contracts lmore than the shoe eliminating frietional engagement along the side edges of the body flan e.

In testimony whereo I afiix my signature.

JOHN E. MARsDEN.

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