Cordless curling iron with separate electric heating station

• US 4,803,341 A
• Filed: 06/19/1987
• Issued: 02/07/1989
• Est. Priority Date: 10/30/1985
• Status: Expired due to Fees

• Current Assignee: Braun Aktiengesellschaft
• Original Assignee: Braun Aktiengesellschaft
• Inventors: Helbig, Gunter, Barowski, Karlheinz
• Primary Examiner(s): Bartis, Anthony
• Application Number:
  US07/071,280
• Time in Patent Office: 599 Days
• Field of Search: 219/222-226, 219/230, 219/242, 219/521, 219/385, 219/495, 219/241, 132/7, 132/9, 132/33 R, 132/33 G, 132/37 R, 132/37 A, 132/117, 132/118
• US Class Current: 219/222
• CPC Class Codes: A45D 1/20 External heating means for curling-tongs or curling-irons

Abstract

An indirectly heatable curling iron (10) has a curling mandrel (12) inserted into the cradle (17) of an electric heating assembly (18) of a separate heating station (11) to establish an intimate thermal contact therebetween for heating the mandrel (12) to a temperature of between 100° C. and 200° C. First and second force components of relatively opposite direction act directly on the inserted curling mandrel such that the first force component, provided by a spring (21) or gravity, causes disengagement of the mandrel (12) from the heating assembly (18), while the second force component causes the mandrel (12) to intimately contact the assembly (18). The second force component is produced by magnetic interaction of a ferromagnetic body (15) on the mandrel (12) with a magnet (20) on the heating station (11), such that for temperature below an adjustable desired value, the second component exceeds the first component, while for temperature above the desired value, the first component exceeds the second component. The temperature of the heating assembly is set to a value of between 200° C. and 500° C.

Claims

1. An indirectly heatable curling iron and heating station comprising

a curling iron (10) having an elongated curling mandrel (12),

a separate heating station (11) which includes a heating assembly (18) having a cradle (17) for removably receiving said curling mandrel (12) of the curling iron for heating the mandrel (12) to a desired temperature prior to use, said cradle (17) providing direct intimate thermal contact between said mandrel (12) and the heating assembly when the mandrel (12) is inserted therein,

said curling iron (10) and heating station (11) including

means for producing first and second force components of relatively opposite direction and acting upon said mandrel (12) of the curling iron (10) when inserted into the cradle (17) of the heating assembly (18) of the heating station (11),

such that the first force component causes disengagement of the curling mandrel (12) from the heating assembly (18) to break intimate thermal contact therebetween while the second force component causes the curling mandrel (12) to engage the heating assembly (18) to establish said intimate thermal contact,

said means for producing the second component of force comprising a permanent magnet (20) arranged in the lateral boundary area of the cradle (17) of the heating assembly (18) and a ferromagnetic body (15) arranged on the curling mandrel (12) of the curling iron (10), the Curie point of the ferromagnetic body (15) corresponding substantially to the desired temperature of the curling mandrel (12),

said permanent magnet being embedded in a recess of said heating station (11) and said permanent magnet (20) and said ferromagnetic body (15) lying opposite each other when the curling mandrel (12) is inserted into the cradle (17) of the heating assembly, such that no direct contact exists between said permanent magnet and said ferromagnetic body (15),

the second force component varying in dependence upon the temperature of the curling mandrel (12), such that for temperatures of the curling mandrel (12), below a selected desired value, the value of the second force component exceeds the value of the first force component,

while for temperatures of the curling mandrel (12) above the adjustable desired value, the value of the first force component exceeds the value of the second force component, and that the temperature of the heating assembly (18) is set to a value above the desired temperature of the curling mandrel.

2. A curling iron and heating station as claimed in claim 1, characterized in that the ferromagnetic body (15) is configured as at least one ring embracing the curling mandrel (12).

3. A curling iron and heating station as claimed in claim 1, characterized in that the spring force of a spring element (21) acting between the heating assembly (18) and the curling mandrel (12) is utilized as the first component of force, said spring element (21) being a wire element for receiving the curling mandrel (12) of the curling iron (10) and being secured to the heating station (11) above the heating assembly (18).

4. A curling iron and heating station as claimed in claim 1 or 3, characterized in that said housing has a shoulder (29) and a protection cap (14) is provided at one end of the curling iron (10), said protection cap being pivotally mounted in said shoulder (29) when the curling mandrel is inserted into the cradle of the heating assembly, said shoulder (29) being arranged relative to the heating assembly (18) in such a manner that the curling mandrel (12), following its disengagement from the heating assembly (18) as caused by the first component of force, has no direct thermal contact with the heating assembly (18).

5. A curling iron as claimed in claim 1, characterized in that the curling mandrel (12) is fabricated at least in part of materials with latent heating accumulating properties.

6. A curling iron and heating station as claimed in claim 1, characterized in that the heating assembly (18) of the heating station (11) has an operating temperature in the range of between 200°

C. and 500°

C.

7. A curling iron and heating station as claimed in claim 1, characterized in that the desired temperature of the curling mandrel (12), by way of the material properties of the ferromagnetic material, is set to values in the range of between 100°

C. and 200°

C.