US2140852A - Sadiron - Google Patents

Description

Dee. 2o, 193s. E. D. PERRY 2,140,852

SADIRON Original Filed Oct. 5l, 1932 INVENTOR Edward' D. Perry.

Patented Dec. 20, 1938.

-UNITED vSTATES smmoN Edward D. Perry, Watertown, Conn., assignor, byE

mesne assignments, to Stern-Brown, Inc., Long Island City, N. Y., a corporation of New York original application october 31, 193e, serial No. 640,383. Dividedand this application April .3, 1936, serial No. ,72,512

2 Claims.l

This invention relates to electrically heated at irons or sad-irons, and'more particularly.to

the type having a metal sole-plate and an atp One object of this invention is to provide an electric sad-iron of the above nature in which the weight is concentrated near the toe or point of the iron where the greatest working pressure is required.

A further object is to yprovide a device of the above nature, which may be placed upright upon its rear end in an elevated position to avoid scorching the surface upon which lt rests.

A further object is to provide a device of the above nature which will be simple in construction, inexpensive to manufacture, easy to Inanipulate, ornamental in appearance, and very eicient and dmahle in use.

With these and other objects in view, there has been illustrated in the accompanying draw-- ing one form in which the invention may be conveniently embodied in practice.

In the drawing: Y

Fig. i represents a longitudinal sectional view of an electric sad-iron embodying the invention.

Fig. 2 is a half sectional plan view of the same, the lower part of said figure showing a longitudinal section taken on the line 2-2 in Fig. l, and the upper part a view of the interior of the iron with the handle and hood removed.

Fig. 3 is a rear end view of the sad-iron clearly showing the three-point support for the iron when arranged in an upright position.

'it is customary in many electric sad-irons to attach a metal bracket at the rear of the hood, which, 'together with a projection on or near the plug-guard forms a stand upon which the iron may be rested in an upright position when not in use. Owing to the heat conductivity of the metal of which these parts are usually constructed there is a tendency for the supporting points to become overheated, so that the iron may Scorch or burn the surface upon which it rests.

By means of the present invention, the above and other disadvantages have been overcome.

Referring now to the drawing, in which like reference numerals denote corresponding parts throughout the several views, the numeral IIB indicates a metal sole plate made relatively thin so as to facilitate the iiow of heat into the ma- Y terlal being ironed, said sole plate being secured in Apositionon the lower side of a filler block I5, asby bolts i! and I2. The bolts if and I2 are preferablyattached to the sole plate Ill-by spinningor staking a pair of upstanding annular ribs I3 and i4 inwardly upon the conical heads of the bolts il and i2, as fullyA described in a co-pending application for Letters Patent, Serial No. 551,640, patented June 23, 1936, under Number 2,045,284.

Resting upon and in intimate thermal contact with the sole plate ill is a relativelyheavy metal filler block-or weight I5, having perforations for receiving the bolts II and I2, and also-having i upon its lower surface a Vishaped shallow groove i5 adapted to receive a V-shaped flat heating element il to be described later. The ller block I5 has a deep stepped longitudinal recess I8 in itsupper rear part and slopes downwardly from front to rear so that the vcenter of gravity of the iron will lie well forward of the longitudinal center, andthe weight of the block will be con' adapted to rest upon flat seats formed in the up-A per surface of the filler block and is engaged by the bolts II and i2 vwhich, pass through holes Y therein `near its ends. Nuts 20 and 2l serve to retain the bridge piece I9 securely upon the ller Y adapted to nt in the groove i6 on the lower side of the filler block i5. Secured above and below the core strips 23 are a pair oi' thin plates of mica 24, preferably made slightly wider than the core strips 23, said plates 2li serving to provide electrical insulation between the conducting ribbon 22 and adjacent metal parts of the iron sole plate i0 and the iiller block i5. By reason of the V-shaped construction of the heating element il, as shown in the drawing, it will be seen that there is developed greater intensity of heat per unit area of the sole plate Ill toward the toe of the iron than toward the hee1". Also, due to the shape of the filler block, a greater amount of heat will be ,stored at the front than at the rear of the iron.

Automatic control of the temperature of the sad-ironis effected by means of a thermostat 255 positioned in the recess i8, said thermostat consisting of a lower horizontal bimetallic Contact arm 26 and an upper metal spring 21 interleaved with insulating plates 2s and secured to a. boss 29 on the filler block 5, as by screws 30. Coacting electrical contacts 3| and 32 carried upon the bent-over extremity of the arm 26 and the end of the spring 21, respectively, are disposed in such a manner that as the temperature of the bimetallic arm 26 rises, the contacts 3| and 32 are caused to separate from each other, thus opening the heating circuit. Regulation of the temperature of the iron is effected by means of an adjusting screw 33, threadedly engaged with the bridge-piece |9 with itspoint bearing upon an insulated abutment 34 mounted upon the metal spring 21. The adjusting screw 33 projects upward and terminates in a, handle 35 secured in place as by a screw 36. The handle 35. is adapted to be manually rotated to change the setting of the spring 21 in relation to the contact arm 26,v thus varying the temperature at which the contacts 3| and 32 of the thermostat will separate.

In order to form a cover for the ller block I5, the bridge piece I9, the thermostat 25, and assoelated parts, provision is made of a thin stamped metal hood 31, the bottom edge of 4which is adapted to fit against'the edge of the sole plate I0, said hood being firmly held in position by screws 38 passing through the hood and threadedly engaged with the bridge piece |9.

For the purpose of establishing electrical connection between the heating element and `the outside circuit, provision is made of a pair of contact pins 39, mounted at the rear end of and passing through perforations in the 'hood 31, to which they are secured as by nuts 40. Insulation is provided by washers; 4| of mica or the like. The spacing of the pins 39 is such as to fit a conventional standard socket (not shown) connected to a source of current.

'I'he electrical parts within the sad-iron are connected by suitable conductors 42 in such a manner as to place the heatingy element l1, the thermostat 25 and the contact pins 39 in series. Mounted upon the exterior top surface of the hood 31, and secured thereto as by the screws 38, is a formed substantially lil-shaped metal frame 43, which, in turn, supports a tubular handle 44 of wood or similar thermal insulating material held in position by a bolt 45 and nut 45a. In order to secure a good operating balance, the handle 44 is positioned well'fo-rward, so that its middle point will come substantially in `a perpendicular line above the center of gravity G of the assembled sad-lron.

Secured to the upper part of the rear end of the hood 31, is an elliptical metal guard member 46, surrounding the projecting contact pins 39 in such a manner as to form a housing for the electrlcal socket, and said guard member is prevented from displacement by a forwardly extending upturned lip or hook member 41 engaging .in a slot 48 formed in the rear arm of the U-shaped frame Projecting rearwardly and upwardly from the guard member 46 is an inclined tongue 49 formed integral therewith and having a vertical upper end 50 upon which is secured, as by a bolt 5|, a knob 52 of wood or similar thermal insulating material, adapted to form one element of a three-point support for the iron when tipped backward intoan upright position. The other two elements of the three-point support are formed by a pair of enlarged ends 53 and 54 of a spool 55 of wood or the like, said spool being mounted in an inclined bracket 56 formed integral with the rear end of the hood 31. `The knob 52 and spool 55 are so positioned relatively to one another that the plane A-A (Fig. 1) is lntersected at a point B by a line G--B drawn perpendicular thereto through the center oi` gravity G of the sad-iron, said line lying well`within 'the triangle formed by the three supporting is shown for the purpose of illustration only, and

that the invention is not to be limited to the speclfic disclosures, but may be modified and em bodied in various otherforms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is desired to secure Letters Patent, is:

l. In a sad-iron, a body structure, said body structure being of relatively great mass and height at the forward end of said sad-iron and being o f diminishing mass and height toward the rear of said sad-iron, a sole plate secured to said body structure, a protective hollow downwardly concave hood closely adjacent said body structure and covering said body structure and being located above said sole plate, said hood sloping downwardly toward the rear and following the contour of said body structure, a handle for manipulating said sad-iron, a support for said handle connected to said body structure through said hood, support means extending rearwardly from said handle support, said hood having an integral rearward extension above said sole plate and below said support means, said extension and sli'd support means providing, when the sad-iron is tipped up on end out of use, a stable temporary rest with the mass of said sad-iron concentrated between said support means and said rearward extension.

2. In a sad-iron, a body structure, said body structure being of relatively great height at the forward end of said sad-iron and being of diminishing height toward the rear of said sad-iron, a sole'plate secured to said body structure, a

protective hollow downwardly concave hood.

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