CA1145805A - Hair straightener and ptc heater - Google Patents
Hair straightener and ptc heaterInfo
- Publication number
- CA1145805A CA1145805A CA000330876A CA330876A CA1145805A CA 1145805 A CA1145805 A CA 1145805A CA 000330876 A CA000330876 A CA 000330876A CA 330876 A CA330876 A CA 330876A CA 1145805 A CA1145805 A CA 1145805A
- Authority
- CA
- Canada
- Prior art keywords
- heater
- plate
- coverplate
- pellets
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D1/00—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
- A45D1/02—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for internal heating, e.g. by liquid fuel
- A45D1/04—Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor with means for internal heating, e.g. by liquid fuel by electricity
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D2/00—Hair-curling or hair-waving appliances ; Appliances for hair dressing treatment not otherwise provided for
- A45D2/001—Hair straightening appliances
- A45D2/002—Hair straightening appliances with combs
Landscapes
- Resistance Heating (AREA)
Abstract
HAIR STRAIGHTENER AND PTC HEATER
ABSTRACT OF THE DISCLOSURE
A heated hair straightener is provided with a handle for connecting to an electric source and has a pair of facing clamp housings pivoted for a scissors action on the handle with the housings having facing coverplate surfaces for abutment clamping of hair between them for straightening the hair. This combination is provided with an improvement in a heater components sub-assembly that fits in one of the housings and which is formed of a sandwich arrangement including an aluminum housing coverplate, a copper elongated heater plate to form a first electrode connected to one side of the electric source and insulated from the coverplate by a thin insulating film. Plural PTC heater pellets are aligned on the heater plate and held in position by an insulating locator panel having cutouts for the pellets to fix them on the heater plate. A second electrode, formed as a corrugated stainless steel springplate to cover and abut the PTC pellets, is connected to the other side of the electric source. This is followed by a phenolic or ceramic insulator member that has a recess to accommodate the corrugated springplate and abut one side of it.
Suitable alignment structure is provided to orient the heater plate, the pellet locator panel and phenolic insulator member such that all the sandwich components of the entire sub-assembly are fixed against horizontal or vertical movement while permitting flexing of the corrugated electrode and good biasing of the pellets against the electrodes.
ABSTRACT OF THE DISCLOSURE
A heated hair straightener is provided with a handle for connecting to an electric source and has a pair of facing clamp housings pivoted for a scissors action on the handle with the housings having facing coverplate surfaces for abutment clamping of hair between them for straightening the hair. This combination is provided with an improvement in a heater components sub-assembly that fits in one of the housings and which is formed of a sandwich arrangement including an aluminum housing coverplate, a copper elongated heater plate to form a first electrode connected to one side of the electric source and insulated from the coverplate by a thin insulating film. Plural PTC heater pellets are aligned on the heater plate and held in position by an insulating locator panel having cutouts for the pellets to fix them on the heater plate. A second electrode, formed as a corrugated stainless steel springplate to cover and abut the PTC pellets, is connected to the other side of the electric source. This is followed by a phenolic or ceramic insulator member that has a recess to accommodate the corrugated springplate and abut one side of it.
Suitable alignment structure is provided to orient the heater plate, the pellet locator panel and phenolic insulator member such that all the sandwich components of the entire sub-assembly are fixed against horizontal or vertical movement while permitting flexing of the corrugated electrode and good biasing of the pellets against the electrodes.
Description
14580~ .
.
HAIR STRAIGHTENER AND PTC HEATER
BACKGROVND OF THE INVENTION
1. Description of the Prior Art Self-regulating positive temperature coefficient heating systems, known as PTC heaters, are well known and have been used for electric heating of various appliances. A PTC resistor, whether of ceramic or other material, is noteworthy in that it has low resistance at ambient temperature and then gradually increases in resistivity as it is heated by electric current through the resistor. The composition of the resistor determines the top temperature that the component is capable of, especially ceramic resistors, and the resistor displays a large sharp increase in resistance thus reducing the current to the resistor to a low level sufficient to maintain it at equilibrium temperature. PTC resistors can provide a large amount of heat while being self-regulating to avoid overheating and thus lend themselves well to appliance use. These PTC resistors commonly take the form of thin discs or pellets where their flat surfaces provide a large contact surface for good thermal contact and for the passage of electrical current through them so that all parts of the resistor material are heated simultaneously. It is necessary to provide good contact with the pellet surfaces for adequate use of the PTC resistors and various arrangements have been proposed both for the heaters per se as well as the use of the heaters in appliances.
`` 1145805 ;'-Accordingly, it is the object of the present invention to provide a combination heated hair straightener using a specific form of PTC heater component sub-assembly to insure optimum heat transfer and heat distribution through the parts. Another object is to provide a PTC resistance heater assembly of a unique sandwich form tha~ assures optimum heat transfer and heat distribution between the parts which assembly may be used in a variety of applications. Thus, the main i0 object is to provide a PTC heater sub-assembly and such sub-assembly in a hair straightener appliance wherein the heater assembly uses a specific different sandwich construction of parts to provide optimum heat transfer and heat distribution between the parts.
SUMMARY OF THE INVENTION
Briefly described, there is provided a heated hair straightener including a handle for connecting to an electric source and a pair of pivoted scissors facing clamp housing on the handle with the handles having facing coverplate surfaces to abut and clamp hair therebetween. In this arrangement a PTC heater components sub-assembly is provided in one of the housings in a sandwich arrangement that includes the facing coverplate, a metallic heater plate forming a first electrode and insulated from the coverplate, an arrangement of PTC resistor heater means in the form of fixed pellets disposed on the heater plate and held in fixed position by an insulating locator panel. A second electrode is formed as a corrugated stainless springplate disposed over and abutting the pellets and connected to S8()5 the other side of the electric source. An insulator partition member follows the corrugated springplate and contains it in a recess. Finally, there is provided means aligning the various parts and fastening them together to compress the pellets against the electrodes by the one corrugated electrode acting as a compression spring, all to positively locate the elements against horizontal and vertical movement and provide ~ood heat distribution and optimum heat transfer for using the sub-assembly in numerous applications as in an appliance.
: BRIEF DESCRIPTION OF THE DRAWI~G
FIG. 1 is a perspective of a typical electric hair straightener appliance.
FIG. 2 is an exploded perspective of the PTC sub-assembly as used in the appliance, and FIG. 3 is a cross-section on line 3-3 of FIG. 2 showing the parts in assembled position.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The invention is described and shown in connection with a PTC heàter sub-assembly that may be used alone or may be usable in different applications and was designed for use in the hair straightener appliance shown in FIG.
1 herein and is so described.
Referring to FIG. 1, there is shown an appliance forming a heated hair straightener including plastic handle 10 that is connected by a conventional cord 12 to a suitable electric source with the handle enclosing the 11~5805 6 D 5 2 4 7 internal electrical connection and hinge structure, neither of which form part of the invention. Cooperating with the handle is a pair of facing up?er 14 and lower 16 clamp housings that are suitably pivoted in handle 10 so that they operate in a scissors action with respect to the handle.
Normally, lower housing 16 may be fixed and upper housing 14 is connected so that it opens by .humb pressure at 18 for receiving hair between the housing as straightened by comb mechanism 20. The appliance is operable as a hair straightener by closing clamp housings 14 and 16 on hair that is straightened by comb 20 and then pulling the device through the hair for straightening while applying heat to at least one of the cover plate surfaces 22, 24. The invention herein resides in the specific heater sub-assembly and as used in the appliance of FIG. 2.
It should be noted that the technology of the particular PTC heater arrangement to be described is generally know in many forms such as the internal construction described in patent 3,996,447 and a similar application of such PTC
heaters in a hair curler as disclosed in patent 3,689,736, both dealing with different PTC construction. Actual PTC pellets are commerciallly available and the instant invention is direct-ed to a sandwich construction of generally known PTC pellets in a compact sub-assembly for application to uses such as an appliance.
Referring to FIG. 2 there is shown the breakdown of the heater component sub-assembly that is disposed, for example, in lower housing 16 to supply the necessary even 1~580S 6D-5247 heat to its coverplate 24. It could be placed in the upper housing 14 or be duplicated there although a single sub-assembly in one housing is sufficient. The sandwich construction includes the facing coverplate 24 of any S suitable material but is preferably metallic such as aluminum for good heat distribution. Immediately adjacent to coverplate 24 is a thin dielectric fil~ 26 of the same area as the coverplate. In order to supply heat to the coverplate, there is provided next a heater plate 28 which is a flat elongated plate covering a substantial portion (over half) of the coverplate and this heater plate forms a first electrode by connection with a suitable wire 30 that is connected to one side of the electrical source in handle 10. For a purpose to be explained, heater plate 28 has notches 32 at each end and the entire plate 28 abuts film 26 to insulate it from the coverplate as shown. The next item in the sandwich construction is an insulating mica locator panel 34 also with comparable notches 36 that match notches 32 in the heater plate. The locator panel is substantially coextensive with, meaning it generally covers, the heater plate although it is slightly narrower and is provided with circular cutouts 38, three being shown, the cutouts being provided to surround and locate PTC discs or pellets 40 so that the pellets do not move once they are aligned along the electrodes. As shown, three pellets are equally spaced along the heater plate for even heat distribution to the heater plate and hence the coverplate. Next to the pellets there is provided a second electrode in the form of a preferably stainless .
.
steel corrugated springplate 42 having a wire 44 connecting it to the other side of the electric source.
This corrugated electrode 42 completely covers and abuts the PTC pellets to provide a biasing spring force against the pellets and urge them against heater plate 28 for good contact and heat conductivity. Thus, the sprlngplate serves as a compression spring and an electrode as well as the means for evening out the force biasing any number of PTC pellets.
, For holding the parts thus far described together, there is a final insulating member 46 in the form of an elongated partition that is also substantially coextensive with the electrodes 28 and 42 and is generally a suitable phenolic or ceramic and is provided with recess 48 to contain and nest springplate 42 to limit horizontal movement. The partition 46 is also molded with buttons S0 that fit with notches 32 and 36 for cooperatively aligning the various parts when the sandwich is drawn together as shown in FIG. 3. Thus, locator panel 34 and the alignment means holds the entire sub-assembly fixed against any horizontal and vertical movement while permitting flexing of corrugated electrode 42.
For holding the entire sub-assembly together, as described, the parts may be suitably connected directly to the lower housing 16 or, conveniently, a mounting plate 52 is provided to complete the sandwich. The mounting plate has simple means such as ears 54 through which screws can attach the entire sub-assembly to housing 16. Also, as shown in FIG. 3, fastening means li458~5 such as rivets 56 extend through the entire sub-assembly from mounting plate 52 to coverplate 24 to hold the sub-assembly together.
The entire sub-assembly is pulled together to be held in a compact sandwich construction as shown in FIG.
3, providing a desirable minimum thermal distance from the PTC pellets 40 to the outside surface 24 of the coverplate. The spacing and alignment of the pellets with the biasing action by the corrugated electode 42 provides even distribution over the entire coverplate surface 24 and the various dielectric layers between all electrical connections and coverplate 24 prevents any possible shock by contact with the metallic coverplate.
The corrugated electrode 42 functions as a compression spring and as an electrical reliable pressure contact on the top surfaces of the pellets 40 thus functioning as a dual component of spring and electrode. Also, the large area interface between heater plate 28, dielectrLc film 26, and coverplate surface 24 assures that optimum heat transfer and heat distribution is obtained through the dielectric film 26. Finally, partition 46 provides positive location for the heater plate 28 in locator panel 34 by its aligning means and thus serves to insulate any hot metal parts from the thermoplastic housing of the appliance. This provides for minimum temperatures of any metallic parts in contac~ with the appliance housing. The compact sub-assembly therefore provides a thin assembly applicable to numerous applications, is of simple inexpensive construction and minimum parts, both obtainable by the use of the -~ S8()5 6D-5247 corrugated springplate acting as a spring and an electrode, to bias the parts into a tight sub-assembly.
While I have hereînbefore described a preferred form ; of the invention, obvious equivalent variations are possible in light of the above teachings. It is therefore to be understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described, and the claims are intended to cover such equivalent variations.
.
.
.
HAIR STRAIGHTENER AND PTC HEATER
BACKGROVND OF THE INVENTION
1. Description of the Prior Art Self-regulating positive temperature coefficient heating systems, known as PTC heaters, are well known and have been used for electric heating of various appliances. A PTC resistor, whether of ceramic or other material, is noteworthy in that it has low resistance at ambient temperature and then gradually increases in resistivity as it is heated by electric current through the resistor. The composition of the resistor determines the top temperature that the component is capable of, especially ceramic resistors, and the resistor displays a large sharp increase in resistance thus reducing the current to the resistor to a low level sufficient to maintain it at equilibrium temperature. PTC resistors can provide a large amount of heat while being self-regulating to avoid overheating and thus lend themselves well to appliance use. These PTC resistors commonly take the form of thin discs or pellets where their flat surfaces provide a large contact surface for good thermal contact and for the passage of electrical current through them so that all parts of the resistor material are heated simultaneously. It is necessary to provide good contact with the pellet surfaces for adequate use of the PTC resistors and various arrangements have been proposed both for the heaters per se as well as the use of the heaters in appliances.
`` 1145805 ;'-Accordingly, it is the object of the present invention to provide a combination heated hair straightener using a specific form of PTC heater component sub-assembly to insure optimum heat transfer and heat distribution through the parts. Another object is to provide a PTC resistance heater assembly of a unique sandwich form tha~ assures optimum heat transfer and heat distribution between the parts which assembly may be used in a variety of applications. Thus, the main i0 object is to provide a PTC heater sub-assembly and such sub-assembly in a hair straightener appliance wherein the heater assembly uses a specific different sandwich construction of parts to provide optimum heat transfer and heat distribution between the parts.
SUMMARY OF THE INVENTION
Briefly described, there is provided a heated hair straightener including a handle for connecting to an electric source and a pair of pivoted scissors facing clamp housing on the handle with the handles having facing coverplate surfaces to abut and clamp hair therebetween. In this arrangement a PTC heater components sub-assembly is provided in one of the housings in a sandwich arrangement that includes the facing coverplate, a metallic heater plate forming a first electrode and insulated from the coverplate, an arrangement of PTC resistor heater means in the form of fixed pellets disposed on the heater plate and held in fixed position by an insulating locator panel. A second electrode is formed as a corrugated stainless springplate disposed over and abutting the pellets and connected to S8()5 the other side of the electric source. An insulator partition member follows the corrugated springplate and contains it in a recess. Finally, there is provided means aligning the various parts and fastening them together to compress the pellets against the electrodes by the one corrugated electrode acting as a compression spring, all to positively locate the elements against horizontal and vertical movement and provide ~ood heat distribution and optimum heat transfer for using the sub-assembly in numerous applications as in an appliance.
: BRIEF DESCRIPTION OF THE DRAWI~G
FIG. 1 is a perspective of a typical electric hair straightener appliance.
FIG. 2 is an exploded perspective of the PTC sub-assembly as used in the appliance, and FIG. 3 is a cross-section on line 3-3 of FIG. 2 showing the parts in assembled position.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The invention is described and shown in connection with a PTC heàter sub-assembly that may be used alone or may be usable in different applications and was designed for use in the hair straightener appliance shown in FIG.
1 herein and is so described.
Referring to FIG. 1, there is shown an appliance forming a heated hair straightener including plastic handle 10 that is connected by a conventional cord 12 to a suitable electric source with the handle enclosing the 11~5805 6 D 5 2 4 7 internal electrical connection and hinge structure, neither of which form part of the invention. Cooperating with the handle is a pair of facing up?er 14 and lower 16 clamp housings that are suitably pivoted in handle 10 so that they operate in a scissors action with respect to the handle.
Normally, lower housing 16 may be fixed and upper housing 14 is connected so that it opens by .humb pressure at 18 for receiving hair between the housing as straightened by comb mechanism 20. The appliance is operable as a hair straightener by closing clamp housings 14 and 16 on hair that is straightened by comb 20 and then pulling the device through the hair for straightening while applying heat to at least one of the cover plate surfaces 22, 24. The invention herein resides in the specific heater sub-assembly and as used in the appliance of FIG. 2.
It should be noted that the technology of the particular PTC heater arrangement to be described is generally know in many forms such as the internal construction described in patent 3,996,447 and a similar application of such PTC
heaters in a hair curler as disclosed in patent 3,689,736, both dealing with different PTC construction. Actual PTC pellets are commerciallly available and the instant invention is direct-ed to a sandwich construction of generally known PTC pellets in a compact sub-assembly for application to uses such as an appliance.
Referring to FIG. 2 there is shown the breakdown of the heater component sub-assembly that is disposed, for example, in lower housing 16 to supply the necessary even 1~580S 6D-5247 heat to its coverplate 24. It could be placed in the upper housing 14 or be duplicated there although a single sub-assembly in one housing is sufficient. The sandwich construction includes the facing coverplate 24 of any S suitable material but is preferably metallic such as aluminum for good heat distribution. Immediately adjacent to coverplate 24 is a thin dielectric fil~ 26 of the same area as the coverplate. In order to supply heat to the coverplate, there is provided next a heater plate 28 which is a flat elongated plate covering a substantial portion (over half) of the coverplate and this heater plate forms a first electrode by connection with a suitable wire 30 that is connected to one side of the electrical source in handle 10. For a purpose to be explained, heater plate 28 has notches 32 at each end and the entire plate 28 abuts film 26 to insulate it from the coverplate as shown. The next item in the sandwich construction is an insulating mica locator panel 34 also with comparable notches 36 that match notches 32 in the heater plate. The locator panel is substantially coextensive with, meaning it generally covers, the heater plate although it is slightly narrower and is provided with circular cutouts 38, three being shown, the cutouts being provided to surround and locate PTC discs or pellets 40 so that the pellets do not move once they are aligned along the electrodes. As shown, three pellets are equally spaced along the heater plate for even heat distribution to the heater plate and hence the coverplate. Next to the pellets there is provided a second electrode in the form of a preferably stainless .
.
steel corrugated springplate 42 having a wire 44 connecting it to the other side of the electric source.
This corrugated electrode 42 completely covers and abuts the PTC pellets to provide a biasing spring force against the pellets and urge them against heater plate 28 for good contact and heat conductivity. Thus, the sprlngplate serves as a compression spring and an electrode as well as the means for evening out the force biasing any number of PTC pellets.
, For holding the parts thus far described together, there is a final insulating member 46 in the form of an elongated partition that is also substantially coextensive with the electrodes 28 and 42 and is generally a suitable phenolic or ceramic and is provided with recess 48 to contain and nest springplate 42 to limit horizontal movement. The partition 46 is also molded with buttons S0 that fit with notches 32 and 36 for cooperatively aligning the various parts when the sandwich is drawn together as shown in FIG. 3. Thus, locator panel 34 and the alignment means holds the entire sub-assembly fixed against any horizontal and vertical movement while permitting flexing of corrugated electrode 42.
For holding the entire sub-assembly together, as described, the parts may be suitably connected directly to the lower housing 16 or, conveniently, a mounting plate 52 is provided to complete the sandwich. The mounting plate has simple means such as ears 54 through which screws can attach the entire sub-assembly to housing 16. Also, as shown in FIG. 3, fastening means li458~5 such as rivets 56 extend through the entire sub-assembly from mounting plate 52 to coverplate 24 to hold the sub-assembly together.
The entire sub-assembly is pulled together to be held in a compact sandwich construction as shown in FIG.
3, providing a desirable minimum thermal distance from the PTC pellets 40 to the outside surface 24 of the coverplate. The spacing and alignment of the pellets with the biasing action by the corrugated electode 42 provides even distribution over the entire coverplate surface 24 and the various dielectric layers between all electrical connections and coverplate 24 prevents any possible shock by contact with the metallic coverplate.
The corrugated electrode 42 functions as a compression spring and as an electrical reliable pressure contact on the top surfaces of the pellets 40 thus functioning as a dual component of spring and electrode. Also, the large area interface between heater plate 28, dielectrLc film 26, and coverplate surface 24 assures that optimum heat transfer and heat distribution is obtained through the dielectric film 26. Finally, partition 46 provides positive location for the heater plate 28 in locator panel 34 by its aligning means and thus serves to insulate any hot metal parts from the thermoplastic housing of the appliance. This provides for minimum temperatures of any metallic parts in contac~ with the appliance housing. The compact sub-assembly therefore provides a thin assembly applicable to numerous applications, is of simple inexpensive construction and minimum parts, both obtainable by the use of the -~ S8()5 6D-5247 corrugated springplate acting as a spring and an electrode, to bias the parts into a tight sub-assembly.
While I have hereînbefore described a preferred form ; of the invention, obvious equivalent variations are possible in light of the above teachings. It is therefore to be understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described, and the claims are intended to cover such equivalent variations.
.
.
Claims (4)
1. A heated hair straightener including a handle having power supply means for connection to an electric source, a pair of facing clamp housings pivoted on said handle for a cooperative scissors action therebetween, the housings each having a coverplate facing the coverplate of the other housing for abutment and clampings of hair therebetween and a heater component sub-assembly in at least one housing for heating the coverplate thereof, said heater component sub-assembly comprising a sandwich arrangement of:
the coverplate of said housing;
a metallic heater plate forming a first electrode connected to one side of said power supply means, said heater plate overlying said coverplate and comprising a flat elongated plate covering a substantial portion of said cover-plate;
a thin dielectric film between said heater plate and said coverplate for insulating said heater plate therefrom;
PTC heater means comprising multiple spaced pellets each having opposed terminal means and aligned on said heater plate with one of the terminal means of each pellet in elect-rical contact therewith;
a second electrode formed as a corrugated spring plate having one side covering and electrically contacting the other terminal means of each pellet, said spring plate being connected to the other side of said power supply means ;
an electrically insulating locator panel substantially coextensive with said heater plate and provided with cutouts surrounding and locating said pellets between said heater plate and spring plate;
an electrical insulator member abutting the other side of said spring plate;
means aligning said PTC heater means, electrodes, and member in fixed assembled relation to one another, and means fastening together the parts comprising said heater component sub-assembly with said electrodes compressed against the terminal means of said pellets, and means adjacent said member securing said heater component sub-assembly in said housing.
the coverplate of said housing;
a metallic heater plate forming a first electrode connected to one side of said power supply means, said heater plate overlying said coverplate and comprising a flat elongated plate covering a substantial portion of said cover-plate;
a thin dielectric film between said heater plate and said coverplate for insulating said heater plate therefrom;
PTC heater means comprising multiple spaced pellets each having opposed terminal means and aligned on said heater plate with one of the terminal means of each pellet in elect-rical contact therewith;
a second electrode formed as a corrugated spring plate having one side covering and electrically contacting the other terminal means of each pellet, said spring plate being connected to the other side of said power supply means ;
an electrically insulating locator panel substantially coextensive with said heater plate and provided with cutouts surrounding and locating said pellets between said heater plate and spring plate;
an electrical insulator member abutting the other side of said spring plate;
means aligning said PTC heater means, electrodes, and member in fixed assembled relation to one another, and means fastening together the parts comprising said heater component sub-assembly with said electrodes compressed against the terminal means of said pellets, and means adjacent said member securing said heater component sub-assembly in said housing.
2. Apparatus as described in claim 1 wherein said insulator member is an elongated partition substantially coextensive with said heater plate and corrugated spring plate and wherein said means for securing said heater component sub-assembly in said housing includes:
a separate coextensive mounting plate disposed against the side of said partition opposite said spring plate;
said mounting plate having means for securing it to the rest of the sandwich sub-assembly and to said clamp housing.
a separate coextensive mounting plate disposed against the side of said partition opposite said spring plate;
said mounting plate having means for securing it to the rest of the sandwich sub-assembly and to said clamp housing.
3. A PTC resistance heater assembly comprising a sandwich arrangement of:
a coverplate ;
a flat elongated first electrode heater plate covering a substantial portion of one side of said coverplate;
said heater plate having means for connecting the heater plate to a source of electric power;
a thin dielectric film coextensive with said coverplate between it and said heater plate;
multiple PTC heater pellets each having opposed terminal means, said heater pellets being spaced along said heater plate with one of said terminal means of each pellet in electrical contact therewith, an electrically insulating locator panel substantially coextensive with said heater plate and having cutouts surrounding and locating said pellets;
a corrugated second electrode spring plate, said spring plate having means for connecting the spring plate to a source of electric power;
said spring plate abutting said pellets to bias them against said heater plate and electrically contacting the other terminal means of each pellet;
an electrically insulating partition with a recess therein covering and nesting said corrugated spring plate electrode; and a mounting plate coextensive with and covering said partition and having means fastening together said coverplate, insulating partition , and mounting plate together with said heater plate and spring plate compressed against the terminal means of said pellets.
a coverplate ;
a flat elongated first electrode heater plate covering a substantial portion of one side of said coverplate;
said heater plate having means for connecting the heater plate to a source of electric power;
a thin dielectric film coextensive with said coverplate between it and said heater plate;
multiple PTC heater pellets each having opposed terminal means, said heater pellets being spaced along said heater plate with one of said terminal means of each pellet in electrical contact therewith, an electrically insulating locator panel substantially coextensive with said heater plate and having cutouts surrounding and locating said pellets;
a corrugated second electrode spring plate, said spring plate having means for connecting the spring plate to a source of electric power;
said spring plate abutting said pellets to bias them against said heater plate and electrically contacting the other terminal means of each pellet;
an electrically insulating partition with a recess therein covering and nesting said corrugated spring plate electrode; and a mounting plate coextensive with and covering said partition and having means fastening together said coverplate, insulating partition , and mounting plate together with said heater plate and spring plate compressed against the terminal means of said pellets.
4. Apparatus as described in claim 3 wherein said coverplate is an aluminum plate;
said locator panel is a mica panel; and said insulating partition is a phenolic or ceramic, and each of said heater plate, panel, and partition having cooperating aligning means;
whereby the sandwich components of the entire heater assembly are all fixed against horizontal and vertical movement while permitting flexing of said corrugated electrode spring plate to act as a compression spring for electrical pressure contact against said pellets.
said locator panel is a mica panel; and said insulating partition is a phenolic or ceramic, and each of said heater plate, panel, and partition having cooperating aligning means;
whereby the sandwich components of the entire heater assembly are all fixed against horizontal and vertical movement while permitting flexing of said corrugated electrode spring plate to act as a compression spring for electrical pressure contact against said pellets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000330876A CA1145805A (en) | 1979-06-29 | 1979-06-29 | Hair straightener and ptc heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000330876A CA1145805A (en) | 1979-06-29 | 1979-06-29 | Hair straightener and ptc heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1145805A true CA1145805A (en) | 1983-05-03 |
Family
ID=4114579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000330876A Expired CA1145805A (en) | 1979-06-29 | 1979-06-29 | Hair straightener and ptc heater |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1145805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011055116A2 (en) | 2009-11-06 | 2011-05-12 | Jemella Limited | Hair styling apparatus |
-
1979
- 1979-06-29 CA CA000330876A patent/CA1145805A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011055116A2 (en) | 2009-11-06 | 2011-05-12 | Jemella Limited | Hair styling apparatus |
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