Hygienic audition pitch. (Machine-translation by Google Translate, not legally binding)

摘要

Hygienic hearing port, characterized in that being able to be coupled to a glass partition or the like, in which a window has previously been cut to house it, it is essentially constituted, by a metal frame composed of two bolted pieces, which leave one another the receiver channel of the partition and bearing hinged inside, by means of easily removable pins, a door, which can be kept closed by a latch that exists in the frame, said door of a ring, also metallic, open inferiorly, and joined their edges by an articulated pressure screw that allows the attachment of a ring or nail, which is attached to a subtle transparent sheet that constitutes the eardrum of the device, said eardrum being protected, at the end of service, by a metal plate, which is interposes between it and the frame, on which it rests, which is easily practicable through a hole circular available. (Machine-translation by Google Translate, not legally binding)