US 2258844 A
Description (OCR text may contain errors)
Oct. 14, 1941. w. BROWN ETAL DEVICE FOR STRAIGHTENING- HAIR Filed June 22, 1940 INVENT OR.
patented ()ct. l4, i941 luo Application June 22, 1940, Serial No. 341,902
This invention relates to a new and improved device for straightening hair and more particularly to a device of this character having an electric heating unit to supply heat to theironing element.
One object of the invention is to provide a device of this character which will be simple in construction, durable and easily operated,
Another object is to provide an electrically heated device which can be plugged into the outlets of regular house wiring, without danger of over-heating the ironing element or burning out the heating unit.
Another object of the invention is to eliminate any possibiilty of burning the scalp of the person whose hair is being straightened.
A further object of the invention is to provide a new and improved heating unit, which will supply a definite amount of heat to the ironing element and which has provision for the radiation of all excess heat.
The invention, therefore, consists of the features of construction and combination of parts hereinafter described in the specification, particularly pointed out in the claims and illustrated in the accompanying drawing.
Referring to the accompanying drawing, Fig. 1 is an elevational View of a hair straightener embodying our invention, Fig. 2 is a central longitudinal view, Fig. 3 is a section on line 33, Fig. 2, Fig. 4 is a section on line 44, Fig. 2, Figs. 5, 6, '7, and 8 are perspective views of the sections which together form the support for the heating wire.
The device, in general, comprises a body or frame portion which resembles a pair of tongs consisting of crossed members which are pivoted together in the usual manner. The members, respectively, comprise a handle portion l and an arm portion H and a handle portion l2 and an arm portion [3, The connecting pivot is shown at I4. The handle portions are provided with bails, I5 and I6, respectively, which enable the device to be held open to receive the hair.
The arm portion ll, of the upper member, has mounted thereon a relatively wide plate H which forms the bottom of the casing 19 for the heating unit. The forward end of the plate I! carries a relatively large head portion H, which we may term the ironing element. This ironing element I7 is made of a solid block of metal of sufiicient size to prevent over-heating and has a smooth, flat bottom surface, which lies below the also has an upstanding shoulder portion H which forms the forward end wall of the casing for receiving the heating unit.
On the end of the arm I3 is formed a flat head I 8, which constitutes the presser plate over which the hair may be laid or stretched out. The presser plate [8 is made relatively thin, so that th hair can be engaged close to the roots. The arrangement is such that when the arms H and i3 are brought together, the bottom surface of the ironing element and the upper surface of the presser element will clamp against each other.
The heat unit comprises a plurality of small sections or blocks made of non-conductive, refractory material. Each block comprises a pair of side plates 20, a centrally arranged web portion 2| and an intermediate partition 22. Each block, therefore, provides four open sided channels for the reception of the resistance wire.
Thes sections are arranged on the plate ll end to end and in placing them the sections are alternately reversed, that is the section nearest the ironing element has the channels facing toward the top of the casing and toward the bottom of the casing and the next section has the channels facing toward th sides of the casing, and so on alternately.
The assembled sections form the core of the heating unit and it will be understood that when the sections are assembled, the four short channels of the respective blocks together form four long channels extending the full length of the core, which taken together form one continuous conduit for the reception of the resistance wire, It will be noted that due to the method of assembling the sections, what we may term the outer faces of the conduit will have open spaces and closed spaces. These open spaces permit direct radiation of heat from the resistanc wire and as they face upwardly and downwardly and sidewise the heat is distributed over the entire surface of the enclosing casing of the heating unit. This eliminates any danger of the operator receiving a burn from contact with an excessively hot part of the casing. The closed spaces, that is where the walls of the sections intervene between the open radiating spaces, provide bars which look the resistance wire in the conduit and prevent it from buckling, thereby increasing th life of the element.
The resistance wire, shown at 28, is fed in at the rear end of the core and is carried forward and backward on one side of the core, then through the core and forward and backward on plan of the arm II. The ironing element ll the opposite side of the core. The ends of the resistance wire are connected to the service wires 29, in the terminal block 21. Clamping blocks 24 and 25 are arranged at the ends of the core to hold the core sections together and are held in place by screws 26.
The employment of our device will be understood readily.
The ironing element due to its relatively large size and the construction of the heating unit will not readily get over-heated and if desired the electricity may be shut 01f and the ironing element will remain sufliciently hot for some time. The presser plate whil being used will only receive heat through its contact with the ironing element and will seldom become appreciably heated, and therefore can be placed close to the scalp at the roots of the hair. The hair is drawn over the presser plate and the presser plate and ironing element are pressed closely together and movement is imparted to the device so as to iron the hair from the roots to the outer ends thereof. 7 7
What we claim:
1. A device for straightening hair, comprising a pair of crossed members pivoted together, each member consisting of a handle portion and an arm portion, the arm portion of one member carrying a fiat head forming a presser plate, and
the arm portion of the other member carrying a large head forming an ironing element, an ele'c-' tric heating unit comprising a plurality of sections, each section having four open channels, the sections being arranged end to end and alternately reversed and together providing a continuous conduit for the resistance wire and resistance wire arranged in said conduit.
2. A device for straightening hair, comprising a pair of crossed members pivoted together, each member consisting of a handle portion and an arm portion, the arm portion of one member carrying a fiat head forming a presser plate and the arm of the other member carrying a large head forming an ironing element and an electric heating unit comprising a casing and a core arranged in said casing, said core having a conduit extending along both sides thereof, said conduit having open spaces for direct heat radiation and closed spaces to prevent buckling of the resistance wire and resistance wire arranged in said conduit, the conduit being sectional, each section having open channels with alternate sections rotated, so as to hold a resistor against displacement.
WALTER BROWN. LILLIAN B. BROWN.