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A heating pad tailored to fit the head and adnexa has been developed for persons who find it necessary to apply heat to the head but who have great difficulty in applying the ordinary heating pad to this part. Because of the circular crown, the attached flaps may easily be adjusted to any area about the head, face and neck.
The heating element consists of fine asbestos-covered nicochrome wire, mounted on a stout piece of canvas in such a way as to distribute the heat equally over the entire pad, whether it be in the crown or in the flaps. This layer is protected by a fold of heavy flannel over which is a covering of durable woolen material. It is lined with water-proof shantung silk especially prepared to resist heat. The entire fabric is easily cleansed and kept fresh with naphtha or gasoline.
There is a double thermostatic control
Fox N. HEATING PAD FOR THE HEAD AND ADNEXA. Arch Otolaryngol. 1937;25(2):212. doi:10.1001/archotol.1937.00650010234011