US1644911A - Electric press - Google Patents

Description

Oct. 11, 1927.

A. R. BRAUN ELECTRIC PRESS v Filed March 25. 1 924 Aqu/d BY y @Vw/W RNEYS y Paienfedoa, 11, y19:27.

,. UNITED STATES' PATENT OFFICE.y

AQUILA R. BRAUN,VOF SYRACUSE, NEWVYORK, ASSIGNOR, BY MESNE ASSIGNMENTS, T THE PROSPERITY COMPANY, INC OF `SYRACUSE, NEW YORK, A CORPORATION or vimw Yom;

I nnncrnrc Piense.

Application led March 25, 1924. Serial No. 701,653.

' This 'invention relates to garment pressing machines and ironing presses and more particularly to improvements in electric presses.

An object of the invention is to produce an electrically heated pressing machine having yone or both pressing jaws thereof electricallyv heated for the Vpurpose of pressing garments or pressure ironing wash goods;

and simple construction constitutes characteristic features of my invention whereby `electrically heated presses of durable con struction may be produced at comparatively low cost. An additional object is to produce improved ironing press jaws electrically heated to avoid the expense and diiiiculty met in manufacturing hot uid pressure tight sealed pressing memberssuch as are required in steam heated pressing machines,

The accompanying drawing illustrates a preferred form of the construction and it. is understood how certain Vchanges may bel made without departing from the scope and principle of the invention..

Figures 1 and 2 illustrate a sideand front elevation of the upper makin portions of a pressing machine utilizing improved electrically heated pressing members constructed in accordance with my invention.

Figure 3 illustrates a plan view of one of the electrically heated pressing members and said member is broken across to illustrate the internal construction thereof.

Figure4 illustrates a cross-sectional view of thev pressing member as developed on the line 4 4."

Figures 5 and 6 respectively illustrate a.

plan and side sectional elevation of an iin- 40 proved attaching means employed in the installatipn of hollow lpressing member. l

Inasmucli as the p'eesent invention relates to the pressing memA rs or jaws themselves, I have omitte the pedal and ,toggle operating mechanism from theaccompanying illustrations such as is ordinarily employed in opening the. pressing 'aws or raising and lowering the pressing ead for it is understood by those conversant iiithe art how this operation is executed by em loying any approved means either manua y or power opthe heating elements within thel erated, and for thatreason' I have illustrated the parts onlyof, the pressing machine namely, the pressing members thereof, which have to do with my invention.

Referring now more particularly to the drawings fora detailed explanation of the,

principles and construction constituting my invention, there is shown pressin members in the nature of a head 10 and buc 11. One

of the members may be ixed or anchored to a frame 9 while the other member, usually the head, is carried on the forward end of a press lever 13 pivoted at 14 on the frame;

and the press lever 13 is operated by any. j

approved means for opening and closing the pressing jaws on the work. A description will now be made of one of the ressing members for it is understood how goth the head and buck may possess duplicate construction for serving the purposes ofeconom in manufacture.

^ pressing member base or shell 11 is provided with one or more channels or grooves -across' which is disposed and supported` a press plate 17 and inasmuch as my pressing members are not provided with steam heating means, the partsdo not have lto be fluid tight and therefore thepress plate 17 and base or shell plate 11 are secured together v with a relatively small number of screws thus making for low cost in production. y An electrical resistance element in the nature of a carbon rod 19 or a resistor element of any other suitable characteristics and structural composition, is coniined in each channel 12 and supported therein by such improved means as will permit the delicate carbon rod 19 to be rigidlysupported within the'hollow pressing member and yet at the same time permit the necessary expansion and contraction of parts without fracturing the heating element; and to this end, eachv end of the elements is provided with preferablya spring'closing jaw y clamp firmly grasping the extremity of the carbon rod. Each clamp 2O is anchored to a 'coil spring 21 the free end of which is usually made with an eye through Ywhich a clamp screw binding post 22 is passed.'

The screw 22 is yconfined in an insulator bushing 23 passing through the wall of the press head or buck; and on the outer end thereof an electrical feed wire l2451s connected. The heating elements are therefore placed in circuit with the current supply line 24 and vheat the entire pressing member. The yieldable spring supports 21 perfor the-double purpose of supportlng and fee ing current to the resistance elements.

Each end of the plurality of electrical.

- resistance rods' is -thus s ecurely attached by heating the pressing members.

lture -without fracturing the heating bers.

I 21 contracts-and expands to permit the cast iron or steel head and buck to contract and expand in the rising and falling temperaelements for itis to be understood that the -delicate .electrical resistance elements 19,'

whether constructed of carbon' or of other suitable resisting compounds, wouldv be broken in the severe usage to which pressingmachines are put and during the heatand cooling operation unless they are delicately suspended by the improved sprinu' and clamp anchorage members 20-21 whic constitutes a feature of my invention.

The channels 12 afford s ace for each heating element without un ulyincreasing the size or thickness of the Apressing mem- The -said. base plates 11 are usually cast so the heating element channels may be inexpensively formed, and the pressing face an sidesin t plates 17 may to 'good advantage be constructed of steel or bronze for in the manufacture .of ironing presses it ordinarily follows that )one of the pressing members,-

'usually the head, is made .with an exposed highlyA olished -pressing and ironing surd) thus the` steel or bronze provides .such surface and especially so when plate 17 is made; of bronze for in this case it readily takes a polished nickel iron' surface.

An improved feature of my invention ree simpleconstruction of the presslneath side ofthe pressing surface plate 17 acaricia ing members, for pressing machines now largely in use are invariably 4iiuid heated and necessarily must be steam and pressure tight which necessitates expensive construction in the finishing of the parts as well as the assembly thereof. But 1n `my improved 'pressing members I avoid such expensive construction by reason of the fact that I employ electrical heating elements suspended within the hollow two part pressing member, and inasmuch as the electrical re-- sistance bars are not placed in contact with the wall of the pressing members it follows that the pressing members are not overheated in any one place. The heat as radiated from the electrical heating elements sets up acirculation of air which rapidly diffuses the heat throughout the pressing members and raises the temperature thereof toa workingand-pressing heat. Press heads and bucks constructed in accordance with my invention are much lighter in weight and contain less metal than steam heated members with obvious advantages. Furthermore a steam boiler is not required which constitutes ay large saving in many respects.

It is to noted that the electrical heatingl elements may be installed onV the underlate itself and that any suitable number o resistances may be employed in this construction to either extend longitudinally or transversely within the hollow member. Inasmuch as the air space clearance between the plate and shell may be very limited, lit follows that a' rpress plate constructed asset forth is very vthin which presents a machine of improved appearance.

In some types of ressin machines it has been ound esirable to the hollow ironing or pressing jaw with a suitable refractory material and in this connection the'reference character Rdesi silica sand, soap stone, or other lillin and packing material lling the member s own inFigure 4.' The refractory material fills the entire air space within the hollow mem ber and rapidly conducts the heat from the heating elements to all parts of the pressi member and acts to Securely hold the heaters in position without interfering in any way with the relative contraction and expansion of parts; and the granular material employed in this connection readily flows to all parts of the member when the parts are assembled and produces a substantial .solid and unitarystructure.' Furthermore, the refractory material constitutes an insulator positively holding the heating elements away from the metal wallsof the heating member, and enables the manufacturer to and ironm v gnates.

place a large numberof heaters in close relation if desirable without dan r of commgmv contact with one another, fwhich member being lprovided with I bers, means constitutes advantages in' function and structure over other electrically heated pressing members. I

What I claim is:

1. A pressing and ironing machine comrising cooperating hollow pressing memrs, means' for electrically. heating the pressing members embodying an electrical resistance suspended within the hollow pressing member, a contractible and expansible anchorage means connected to the resistance and to the pressing member to hold the resistance in suspended position, and a current feed line connected to the anchorage means.

2. A pressing and ironing machine comprising-cooperating hollow pressing memfor electrically heating the pressing members embodying an electrical resistance sus ended within the hollow pressing mem er, said hollow pressing within which the aforesaid resistance element is suspended, a flat cover pressing plate anchored over the channels, -a contractible and expansible anchorage means connected to the resistance and to the pressing member to hold the resistance in suspended position, and a current feed line connected to the anchorage means.

3. A pressing member comprising a hollow flat surface metal part, a plurality of electrically heated resistance rods suspended therein in spaced relation :from the walls of.

' the hollow part, and resilient anchorage means secured to the hollow 'pressing member to permit contraction o r. expansion of the resistance rod and pressing member relatively one to the other.

4. A pressing member comprising a'hollow flat surface metal part, a plurality of electrically heated resistance rods suspended therein in spaced relation from the walls O f the hollow part, a sprin support conductor .l attached to each end o the resistance rod,

and abinding post anchored to the pressing member and supporting the end of thel spring conductor to hold the resistance rod in suspension within the -hollow Ipressing member.

5. An electrically heated pressing member comprising a shell made with channels,

formed therein, a binding post and electrical terminal anchored to the pressing member at each end of the channels, a spring 'current conductor fixed to each binding post terminal, and a carbon rod electrical resistance element having each end attached to .the spring conductor and suspended Jin the said c annel.

6. An electrically heated pressing member constituting a hollow shell having a pressing surface,` a plurality of bindingposts anchored in the shell and'projecting through the wall thereof, a current supply wire conchannels pended electrica nected to the binding posts, coil 'spring suspension supports having one end fixed to the said binding post within the shell, and an electrical resistance element supported by and between the free ends of the spring conductors' in suspended relation closely arranged but spaced from the pressing surface.

7 A pressing member electrically heated, comprising a base plate having a marginal rib extending therearound, resilient current conductors having one end ixed to the press- -ingmember and the other end left free, a

carbon rod heater, aclamp holding the ends of the carbon rod in connection with current conductors, and a plate anchored to the marginal rib covering over the heating elements and acting as a presslng.

8. A pressing member comprising a base plate having a marginal rib extending therearound, said member provided with a plurality of channels reaching to the marginal rib, a carbon rod resist-ance element disposed within each channel, a spring having one end anchored' to the extremity of the carbon rod, a binding post support holding l the other end of the spring thereby suspending the carbon rod in the channel in spaced relation from the wall of the pressing mem- 'ber, and a press plate secured to the marginal rib covering over the heating elements.

A pressmg Amember such as a jaw, comrlsing a cast shell, a marginal rib raised on the shell, a cover pressing plate secured to the rib and held in closely spaced relation to the wall of the cast shell thereby providing a space between the shell and cover, said shell wall being provided with .a groove or channel therein providing additional-clearance between the pressing, late and shell wall, a carbon rod suspen ed within the groove and spaced from the cover plate and shell, a spring conductor support fixed to each end of the carbon rod and resiliently suspending the said rod in the channelA 'thereby permittingvrelative contraction and expansion between the pressing member and the carbon rod, and a current conducting bindingsu port anchoredy to the' pressing member and adapted' to feed current through thespring support to the carbon rod.

'10. A'pressing-and ironingmachine comprising cooperating hollow pressing members, pressing members embodying an electrical resistance suspended. within the hollow pressing' member, a contractible and expansible anchorage meansconnected to the resistance and to the pressin' member to hold the resistance in suspended position, a current feed line connected to theA anchorage means, and refractory material vfilling' the hollow member acked around the said susresistance to hold them in place and conduct the heat therefrom to th walls of the pressing members.

means for electrically heating the 11. A preing member comprising a hollow flat. surface metal part, a plurality of electrically heated resistance rods suspended therein in spaced relation from the walls of the hollow part, a granular refractory material illingthe hollow member and packed aroundv the said resistance rods to securely hold. them in place and conduct the heat to Lemmi the walls of the preilug member, and reor expansion of the resistance rod and press- .ing member relatively one to the other.

In testimony whereof I aix my signature.

AQUILA R. BRAUN.

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