US 3658071 A
The invention provides a hair curler wherein a bimetallic element is utilized as a temperature indicating means in conjunction with a dial arrangement so as to provide a range of temperatures for user selection based on her personal hair and/or skin characteristics.
Description (OCR text may contain errors)
United States Patent Wise 1 1 Apr. 25, 1972  HAIR ROLLER WITH RANGE 2,284,048 5/1942 Ford ..73/363.7 E I DICAT 2,866,338 12/1958 Muncheryan.... ..73/343 TEMPERATUR N 0R 3,487,197 12/1969 D'Elia et al. ..219/222  Inventor: Robert A. Wise, Edison, N.Y.
Primary Examiner-Louis G. Mancene  Assignee. svg'zs tgigglgguse Electric Corporation, Pitt Assistant Examiner cregory E McNeil Attorney-F. H. Henson, E. C. Arenz and Richardson B. Far-  Filed: July 28, 1970 ley i  Appl; 190.: 5 8,786 ABSTRACT [52.] U S Cl I 132/33 219/222 The invention provides a hair curler wherein a bimetallic eles11 nitfcl. ..A 45d 2/12 is utilized as a temperature indicating means in Conjunc-  Field 0 Search" l32/33 R 40' 41 9; 219/222 tion with a dial arrangement so as to provide a range of tem- 219/506; 116/1145; 236/94; 73/363] 343 peratures for userselection based on her personal hair and/or 1 skin characteristics.  References Cited 7 Claims, 4 Drawing Figures UNITED STATES PATENTS 3,257,541 6/1966 .lorgensen ...219/222 PATENTED R 25 I97? 3 658 O71 WITNESSES INVENTOR [I I Robert A Wise 1 Wfl,
ATTORNEY BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the hair curling art and, more particularly, relates to a hair curler having a temperature indicator means mounted on the rollers.
Description of the Prior Art It has been found important to control the temperature to which hair rollers are heated so as to eliminate discomfort resulting therefrom and alsoto limit the splitting of the ends of the hair by overheating. Prior art attempts at controlling the temperature at which curling occurred, have utilized thermostatic control of the heating means which heated all of the individual hair rollers such as shown in U.S. Pat. No. 3,486,000 issued Dec. 23, 1969 or have utilized temperature indicators on the rollers such as colored dots which change color when the hair roller has reached a desired temperature, or, alternately, have utilized latch arrangements that release the hair rollers from the heating platform once a preset temperature for hair curling has been reached such as shown in U.S. Pat. No. 3,415,254issued Dec. 10, 1968.
However, none of the aforementioned hair curler arrangements make positive provision for user-temperature preference once the hair rollers have been heated to a preselected hair curling temperature. Accordingly, it would be advantageous to provide a hair curling arrangement wherein at least one or perhaps all of the hair roller units provided a temperature range indication means so that the user could select that portion of the range most advantageous to her, personally.
SUMMARY OF THE INVENTION According to the principles of the invention individual hair rollers are provided having a bimetallic coil thermostatic element mounted adjacent each of their tops. An integral pointer, formed by a portion of the bimetallic coil, is included and a dial placed over the top which may be indexed relative to the pointer. The dial contains indications which-are related to hair quality, such as: fine, medium or coarse or such as: dry, regular or oily. Thus, a range of readings is provided so that the user may select hair rollers as they reach the temperature which is most adapted for her own particular hair characteristics.
It is contemplated, in the practice of this invention, that a plurality of sizes of hair rollers will be provided, such as: small, medium and large and that these hair rollers will be mounted on a conventional heating element including stems, integral with the base heating member so that the various sized rollers will reach the desired temperature at different rates and thereby different times. Of course, the small rollers would be first to reach the proper curling temperature, then the medium rollers and finally the large. The user could then conveniently select the rollers as they come to temperature and place them in her hair, rolling the hair around each of the rollers to finally provide a hair style arrangement suitable to her.
DRAWING DESCRIPTION For a better understanding of the invention, reference may be had to the preferred embodiment, exemplary of the invention, shown in the accompanying drawings, in which:
FIG. 1 is a perspective view of the hair rollers arranged on their heating platform;
FIG. 2 is a partial cross-sectional view of a single hair roller embodying the invention;
FIG. 3 is a top plan view of the heated hair roller of FIG. 2; and
FIG. 4 is a top plan view of another type of dial which may be utilized in carrying out the principles of the invention.
2 DESCRIPTION OF THE PREFERRED EMBODIMENT There is shown in FIG. 1 a series of hair rollers 10 which include my invention mounted on a heating platform 12. The heating platform 12 has a series of metallic stems 14 protruding through a top plate 13, with these stems being of such diameter to accommodate the smallest and largest sized rollers 10. Top plate 13 has disposed, beneath it and within a shell-like enclosure 16 of heating platform 12, a heating element (not shown) which transfers its heat to the metallic stems 14 for eventual heating of the rollers 10. The rollers 10 receive heat through conduction and radiation from the stems 14. The shell-like enclosure 16 also conveniently may mount a thermostat (not shown) which is set to open at some upper limiting temperature to prevent the overheating of the base 12 or melting the hair rollers 10.
The rollers 10 are comprised of a hollow cylindrical body 18 made of a plastic material such as glass filled polypropylene with a single, closed end 20 and with this end spaced somewhat inwardly from the outer termination of the roller 10. Extending generally axially centrally relative to the linear extent of the roller 10 is a stud member 22 formed integral with the body portion 18 and'integrally attached thereto at the end 20 to extend outwardly therefrom. The stud member 22 terminates short of the outer termination of the roller 10. The body 18 of hair roller 10 is completed by a series of outwardly extending teeth 24 formed integrally with the body 18 and spaced around the outer periphery of the roller so as to provide a means for engaging and catching within the hair being curled therearound.
In carrying out the principles of my invention, a thermoresponsive means 26 is disposed adjacent the outer ends of the hair rollers 10. This thermoresponsive means consists essentially of a bimetallic spiral 28 which is mounted on the stud member 22 by being inserted in a diametrical groove 30 formed therein. An inner straight end 32 of the bimetallic spiral 28 is received within this groove and the remainder of the bimetallic spiral is disposed in a series of even larger coils that extend around the stud member 22. At the outer periphery of the bimetallic spiral 28 a generally straight end 34 is provided that extends substantially outwardly at a right angle from tangency with the closest adjacent portion of the outer coil 33. This end of bimetallic spiral 28 forms the indicating means or pointer for temperature reading by the user of the hair roller 10.
Because of the inward displacement of the end 20 of the body 18 from the outward termination thereof, a space 36 is provided within which the bimetallic spiral 28 is mounted for movement of its end 34. This space is then sealed by an indicator dial 38. The indicator dial 38 is placed in a non-removable manner on and within the body of the roller 18 by means of a flange 39 which is formed in the said body, this flange being generally annular so as to fixedly retain the indicator dial 38 with the body 18. The assemblage of these two elements is obtained by inserting the indicator dial 38 in an annular bore or enlarged bore portion 40 formed in body 18 and terminated by a face 41 so that the space 36 represents a stepped bore before assembly. of the indicator dial 38. The indicator dial 38 is held therein (in the bore 40) against the face 41 by a pressurized heating operation which turns the flange 39 downwardly against the indicator dial 38. The periphery of the indicator dial 38 is thereby fixedly held and retained to the body 18 by the flange 39. Just prior to this assembly operation, the hair roller 10 is calibrated by rotating the dial 38 so that it is located relative to the end 34 of bimetallic spiral 28 so as to give a proper reading of temperature as the hair roller is heated.
The dial 38 itself, may include a series of indications thereon such as F, M" and C" indicating that the temperature setting is for fine, medium and coarse hair. A portion of the dial shown at 42 may be blanked out as is shown in FIG. 3 and FIG. 4 so that the bimetallic spiral 28 is not observable through the transparent dial 38 except for the extending end 34 which serves as the indicator means that moves between the aforesaid indices F," M and C as the roller heats from hot to hotter.
An alternate indicator dial 44 is shown in FIG. 4 wherein the indications utilized are D, R and These indications may be related to dry, regular and oily hair and may alternately be used as a guide by the consumer in the proper use of the roller 10. Removal of the roller from the metallic stems 14 then may be had when the indicator 34 has moved to or close to that indication which best serves for the setting of the users hair.
The operation of the hair roller 10 is rather simple. The consumer may be guided in its usage by the indicator end 34 moving into the proper temperature range as indicated by the indices F, M and C" or D," R" and O," contained on the dials 38 or 44. Essentially the operation is as follows: the hair rollers 10 are placed upon the base 12 and the heating element contained therein (not shown) energized to provide a heating effect through the metallic stems 14 to each of the hair rollers 10. The smaller hair rollers 10 will obviously reach curling temperature first so these would be the first ones selected by the user. They would be removed from the base 12 as the indicator end 34 reached that temperature range in which the user had found the proper hair curling temperature. Next, the intermediate sized hair rollers 10 would be removed and these wouldbe utilized, and finally the large size hair rollers 10 would be removed and utilized. Thus, each series of rollers would be removed from their metallic stem 14 upon the temperature range being reached which was best for the user of the hair curling appliance.
It should be obvious that the hair rollers 10 and indicating dial arrangement provided therein offers a temperature selector range for the user which is not available in prior art hair curlers and that such a range provides a large number of different temperatures which the user of the appliance may select for proper hair curling temperature. It should also be obvious to one skilled in the art that many modifications can be made to the invention described and that many of these modifications will fall within the spirit and scope of the description offered.
What is claimed is:
l. A hair roller including:
a. an integrally molded cylindrical, substantially hollow body;
b. an integrally molded end cap for said body, said end cap displaced from the termination of said body;
0. a space provided between said end cap and said termination of said body;
d. a stepped bore provided by said space; including an enlarged bore portion,
. an index means disposed over said end cap and substantially enclosing said space;
f. said index means being disposed in said enlarged bore portion and being maintained in integral molded cylindrical, substantially hollow body by an inturned flange formed in the outer termination of said enlarged bore portion;
g. a bimetallic spiral thermostatic means disposed in said space; and
h. an end of said bimetallic spiral means providing an indicator for readout of a series of temperatures of said hair roller.
2. The hair roller set out in claim 1 wherein:
a. said index means is rotatable in said enlarged bore portion for positioning with respect to said indicator formed by said bimetallic spiral means; and
b. said inturned flange is then formed for holding said index means in a selected position relative to said indicator formed by said bimetallic spiral means.
3. The hair roller set out in claim 1 wherein:
a. said bimetallicspiral means has an inner and an outer end;
b. said inner end is fixed to said body; and c. said outer end provides a movable indicator for indicating temperatures. 4. The hair roller set out in claim 3 wherein: a. said end cap includes an integral stern; and b. said stem fixedly mounts said fixed inner end of said bimetallic spiral. 5. The hair roller set out in claim 4 wherein: a. said stem includes groove means; and b. said fixed end of said bimetallic spiral is disposed in said groove means. 6. A hair roller including: a. a cylindrical, substantially hollow body; b. an end cap for said body displaced from the termination of said body; a space provided between said end cap and said termination of said body; an index means placed over said end cap and enclosing said space;
a bimetallic spiral thermostat means disposed in said space; said bimetallic spiral thermostat means including a moving end, said moving end providing a pointer means for indicating for readout of a series of temperatures of said hair roller. 7. A hair roller including: a. a temperature indicating means; b
. a hair roller body;
. said temperature indicating means mounted in said body and including a pointer means for movement proportional to an attained temperature; and
d. an index means for relating attained temperature to a desired temperature range for hair curling purposes.