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| Number | Title | Issue Date |
| 4718415 | Breathing mask having a transducer movable parts coupled to a speaking diaphragm for speech transmission A breathing mask includes a carrier which has an inhalation passage and an exhalation passage and a passage over which a speaking diaphragm is extended for speech transmission from the interior of the mask to the exterior. In accordance with the invention... | 01/12/1988 |
| 4682363 | Amphibious personal audio system An amphibious personal audio system is provided. The system includes a band for encircling a person's end. An audio device is secured to the band for generating an audio signal. The audio device is hermetically sealed. Speakers are electrically coupled to... | 07/21/1987 |
| 4636592 | Speaker mounting for lined helmet Apparatus and a method for mounting a speaker in a lined helmet whereby a speaker is placed in a covered cup attached to a blade and the blade is inserted between the lining and shell of the helmet so that the speaker will be located adjacent to the weare... | 01/13/1987 |
| 4556121 | Holder A holder is provided for securing a microphone or earpiece in position inside a helmet. The holder comprises a plurality of tubular rings of soft flexible material. One ring is adapted to be connected to a shell of the helmet, and the other rings are seri... | 12/03/1985 |
| 4538034 | Earphone assembly An earphone assembly including a bracket member for retaining an earphone unit in place on the head of a user, the bracket member being formed with a channel for receiving a strap of a head gear for mounting the bracket member on the user's head, the brac... | 08/27/1985 |
| 4523661 | Earphone system for use in large-cavity earcups A sound-attenuating earcup assembly for isolating the ear of a wearer from ambient sound while affording the wearer external communication capability without doffing the earcup assembly in which a sound-attenuating earcup of relatively rigid material form... | 06/18/1985 |
| 4400591 | Simulated space helmet A helmet having a built-in modulator and amplifier for voice alteration and projection is disclosed. The helmet includes a forwardly projecting nose housing having a viewing shield and an array of light emitting diodes. The light emitting diodes are coupl... | 08/23/1983 |
| 4259747 | Protective communications helmet A protective communications helmet combining aural, visual, flying object d bump guard protective features with electronic communications including a multiple section shell comprised of a central shell to which lateral electronics compartments are removab... | 04/07/1981 |
| 4132861 | Headset having double-coil earphone A headset for use in a voice communication system which provides a common audio signal, such as a radio receiver signal, to a plurality of such headsets. The headset includes an earphone having a double voice coil and an ambient sound microphone arranged ... | 01/02/1979 |
| 4110583 | Earphone construction In an earphone construction an axially extending tubular shaped member forms a passageway or listening channel with an ear opening located between the ends of the member. A sound source is positioned in the passageway, spaced from the ear opening, for dir... | 08/29/1978 |
| 4109105 | Earphone mounting in safety helmet for motorcycle riders A sound producing helmet for motorcycle riders utilizes a pair of speakers, each secured within an opening in the lining of a motorcycle helmet. A cloth-like screen is secured to the exposed surface of the lining covering the opening. A wire-like screen a... | 08/22/1978 |
| 3999177 | Vehicle operator alert sensor and alarm Disclosed is apparatus for keeping a vehicle operator awake by means of an audible alarm or signal responsive to a nodding or tilting forward movement of the head of the operator of the vehicle. The apparatus includes a switch mounted on a hat, ear hook o... | 12/21/1976 |
