US 1901385 A
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March 14,- 1933. H K WARNER Er AL .1,901,385
ELECTRIC IRON Filed March 1'7, 1951 Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE L HORACE xINToN WARNER AND GEORGE ROBERT ELLIOTT, E, AUCRLAND, NEW
ZEALAND, ASSIGNOBS T0 WARNELL PATENTS LIMITED, ZEALAND, A COMPANY 0F NEW ZEALAND Y OF AUCKLAND, NEW
e ELECTRIC IRON Application tiled March 17,1931, Serial No.
Y f of electric iron for the purpose of 4control- Vling the current supply to cause it to be au- .tomatically turned on when the iron handle is grasped by the hand, kas in the `use of the Y iron, andy to beturned off when such grasp is loosened. Also these means are of such a nature as to provide for the iron being rested on its heel and by so doing, at the will of an operator, to either leave the current off, or to turn it on, as may be desired.
The invention comprises the combination within the iron handle, of switch mechanism that is interposed within the current supply lead tothe iron, and is so made that in normal conditions the switch is open to stop the current flow, but is closed when the handle is grasped in the users hand and thus to provide for the supply to the iron heating element. This switch mechanism has embodied therewith means whereby the switch may be closed when the irony is resting on its heel, in order thus to providejfor the heatingk of the iron preliminary to its use.
In fully describing the invention reference will be made to the accompanying drawing, in which Figure 1 is a side elevation of the complete iron.
Figure 2 is a longitudinal side sectional elevation of the iron handle and the switch mechanism arranged therein.
Figure 3 is a cross sectional elevation on the line 3 3 of Figure 2.
Figure 4 is a plan showing the iron handle in section and the switch mechanism in plan.
In giving effect to the invention the handle 10 is made hollow, as by being made in upper and lower halves secured together by means of screws 11. The space enclosed by the vupper and lower halves is continued rearwardly out through the handle end in the form of a central bore 12 and two side wire grooves 13 formed in the upper surface of the lower half and which are closed in The lower half of the handle is also formed 523,328, and in New Zealand J'uly M, 1930.
with a slot 14 extending longitudinally therein and opening down through to the bottom. e
A horizontal base board 15 of suitable insulator material isailixed to the upper surface of the lowei` half ofthe handle so that it extends within the hollow space thereof, and this plate at its rear end is fitted with two terminal screws 16, one near each'side and in the lines of the respective grooves 13. Near its forward end, the plate is fitted with vtwo contact studs 17, one near each side, which are electricallyconnected respectivelywith the terminal screws 16 on the corresponding edges of the base board, as for instance by means of the metallic strips 18 let into the surface of such board.
The connecting flex for the iron is led to it in the usual manner by attachment to the two point plug 19 but the supply lead of vthe flex, instead of being connected directly to its terminal in such plug, is carried first in through one of the grooves l13and is attached to one of the terminal screws 16, and the plug terminal is then connected to the other terminal screw 16. Thus thesupply circuit isgbroken, but it may be closed by the electric bridging of the two studs 17. The, mechanism devised provides for this being done under the circumstances before-V mentioned.`
This mechanism comprises ay switch plate or disc 20 that isv arranged upon the base board 15 by being mounted on a centrally disposed pivot 21, and is so made that in one position of its turningkmovement it bridges the studs 17, while in another it frees them from connection. A stem piece 22 is mount- `ed in suitable guides 23 to extend longitudinally along above the base board and above the switch plate 20. This is connected to the switch plate by means of a spring connection 24lvattached to the plate at a distance from its centre and so arranged and made that upon an inward movement of the stem, a pull is exerted on'the spring to turn the switch plate on its pivot in the direction to bridge the studs17, and onthe reverse movement, toV turn it` reversely to break such connection. The turning of the switch 'plate is made sufficiently resistant to provide that they spring requires tensioningv before the plate will turn in order thus that quick make and break of the kswitch is effected in the workingioffthe apparatus. y v n The stem 22 iskept normally lforced outwardly to turn the switch plate to the offy position, by means of a spring 25 surrounding `it and arranged Vin compression between the guide 23 and a shoulder upon the stemY end. When thereforethe stem is free, the switchV is open to cut oil the power supply. A bell crank lever is pivoted in the rear end offthe baseboardl, such :lever having one arm 26 extending upwardly and fitting looselywit'hin a slot 27 formed in the'rear f end oi the stem 22, and its 'other armi-28 extending downwardly into the slot .14ct vthe iron handle. A :bow shaped lever 29 is arranged to extend valong within this slotV and has its front end pivotedito the'forward end of the base board 15 while its rear `end isarticulated to the arm 28 of the .bell crank lever. 'This bow lever/has its .bow extending downwardly, and it is designed on up,- ward movement being given to it, to 'turn the bell crank lever and to .force the stem 22 in a "forward direction to close the switch. The amount of .this downward curve is such as to cause the lever to project beyond the survface of th'ehandle bottom in order thus thatv when the handleis grasped by the 'hand vclosing upon it, the lever is turned upward to i 1close the switch and retain it Vclosed so long as v'the grasp visfretained.V On the grasp being releasechthe switch will automatically open under the action of thenspring 25.
VThus .the desiredefect of keeping the rcurrent vsupply on while the iron isbeing used, vand* automatically turning it oli' when the v use ceases, is obtained. f
- `To provide for ,the switch being closed when the iron yis turned up on its heel, a presser bar 8O is provided and mounted to slide inthe handle bore 12 so that one end engages .the rear of the stem 22 while 'its other endprojects "afdistance beyond the rear ofthe handle. `When the iron v"is turned up torest on its heel, this Vbar. will engage :the .surface on which kthe A'iron rests, and
base board and interposed in the current supply lead to the ironheating element, av bridging plate or disc mounted to rotate on such board and adapted in one position to connect the studs and in other to disconnect them, a stem piece mounted vto slide `longitudinally in the handle above the base board, connected to such .bridging iplate or disc vby `a .tension spring, .adapted when .mov-
ed iorwardlyto V.turn .it Lto the `connecting position, a spring acting on the stem piece and forcing it to the rearward, or disconnecting, position, a bell crank lever mounted to extend vertically in the handle and having an upwardly extending armengaging Vthe rear endoi the stem piece and its secondV arm 'extending rearwardly and downwardly,
and a bowshaped lever arranged to extend along beneath 1the handle'withits bowdownfc ward, and having its for-ward endpivoted in the handle and its :rear end :articulated to the second arm of th *Said be Canjk lever. f S
" 2."In electric irons according to claim '1,
a presser bar fitted to slide within the rear end oit thehandle, having its forward end `arranged to engage the rearendyoi' the said stem .piece and its rear fend to project beyondthe'handle end.
yHORACE K-I-NTONk WARNER. vGEORGE ROBERT ELLIOTT.
arrangedwithin such hollow, a pair of contact studs fixed 'upon 'thefsurfa-cejof 'such In testimony whereof, we aliixour signai