Portable hair drying appliance and heating element assembly therefor
AssigneeSperry Rand Corporation
InventorsSiegfried Godel, James Joseph Viola
Life of this patent
Estimating the term…
Abstract
A heater assembly for an electrical appliance such as a portable hair dryer. The heater assembly includes an elongated flexible foil resistance element having opposite longitudinal edge portions mounted on spaced disc support members. T-shaped tabs extend from the foil edges and are seated in recessed portions or notches located in the periphery of the discs with the T-end portions thereof locked to the discs by detent means provided on the discs.
Claims11
An elongated cylindrical-shaped electrical heater assembly comprising,
- a. a pair of spaced disc members,
- b. a plurality of spaced teeth formed around the periphery of each of said disc members,
- c. a cylindrical-shaped heater element extending between said disc members and formed of a flexible electrical resistance foil strip having a plurality of transverse ribs interconnected at their end portions to form a continuous resistance element, said ribs each having an air directing vane formed therein between said end portions, said end portions being mounted on the periphery of said disc members in engagement with said teeth,
- d. means contacting and cooperating with the teeth around the periphery of at least one of said disc members for containing said end portions lying between said teeth of said at least one disc member to prevent dislodgment of said end portions from said at least one disc member, and
- e. said at least one disc member having a central opening to permit airflow through the interior of said cylindrical heater assembly.
An elongated cylindrical-shaped heater assembly comprising,
- a. a pair of spaced disc members,
- b. a plurality of spaced teeth formed around the periphery of each of said disc members,
- c. a plurality of notches defined by said spaced teeth,
- d. a cylindrical-shaped heater element extending between said disc members and formed of a flexible electrical resistance foil strip having a plurality of transverse ribs interconnected at their end portions to form a continuous resistance elements, said ribs each having an air directing vane formed therein between,
- e. said ribs each having a pair of shoulders between said end portions and said vane, said end portions being T-shaped and having a cross-bar portion and a stem portion, the stem portion joining the shoulders of said ribs and the cross-bar portion being spaced from said shoulders,
- f. said stem portion being seated in said notches, while said cross-bar portion and said shoulders engage therebetween portions of said teeth for preventing lateral movement of said heater element relative to said disc members,
- g. means cooperating with said teeth of at least one of said disc members for containing said stem portion within said notches to prevent dislodgment of said stem portion from said at least one dsic member, and
- h. said at least one disc member having a central opening to permit airflow through the interior of said cylindrical heater assembly.
In an electrical appliance including in combination, a casing having air intake vents and an air discharge orifice spaced from said intake vents, a mounting member located within said casing between said intake vents and said discharge orifice, airflow generating means mounted in axial alignment with said mounting member, a cylindrical-shaped heater assembly mounted in axial alignment with said airflow operating means and comprising a pair of spaced disc members having a central opening therein to permit airflow therethrough, a cylindrical-shaped heater element extending between said disc members and formed of a flexible electrical resistance foil strip having a plurality of transverse ribs interconnected at their end portions to form a continuous resistance element, said ribs each having an air directing vane formed therein between said end portions, said end portions mounted on the periphery of said disc members, said airflow generating means being operable for generating an airstream in said casing from said intake vents through said heater assembly to said exhaust orifice and outwardly of said casing, the improvement comprising,
- a. a plurality of spaced teeth formed around the periphery of each of said disc members,
- b. said end portions of said heater element being mounted in engagement with said teeth, and
- c. means cooperating with and contacting said teeth around the periphery of at least one of said disc members for containing said end portions lying between the teeth of said at least one disc member to prevent dislodgment of said end portions from said at least on disc member.
Dependencies are inferred from the claim text.