| Patent Number |
Title Of Patent |
Date Issued |
| 4800122 |
Siloxane-based tintable coating |
January 24, 1989 |
| An abrasion-resistant coating composition for use on transparent plastic substrates and the like is formed from a first component derived by partial hydrolysis from a hydrolyzable epoxysilane and a second component comprising the reaction product of a non-silane-based aliphatic polyamine |
| 4778638 |
Method of making ballistic helmet |
October 18, 1988 |
| A method of making a ballistic helmet and a helmet made by the method in which each of the plies making up the body is formed from a hexagonal blank cut from ballistic cloth and provided with slits extending from the apices thereof toward the center to form a central area and segments |
| 4748694 |
Spring device for earcup assemblies of protective helmet |
June 7, 1988 |
| An improved binaural earcup assembly for use with a protective helmet in which the earphone of each of the left and right sound attenuating subassemblies is supported by a relatively rigid member in the hard outer shell of the subassembly at a location adjacent to the wearer's ear and in |
| 4713844 |
Protective helmet with face mask sealing means |
December 22, 1987 |
| An arrangement in which a toggle mechanism on the outside of a proective helmet acts on an end of a nape strap outside the helmet to shorten the effective length of the nape strap within the helmet to move the wearer's head forward to bring the wearer's face into engagement with the face |
| 4700410 |
Pneumatic adjustment means for earcups in helmets |
October 20, 1987 |
| A protective helmet assembly in which a manually operable pump carried by the helmet outer shell is accessible from outside the shell to inflate two inflatable bodies disposed between the shell and respective sound-attenuating earcup subassemblies suspended from the shell adjacent to |
| 4698956 |
Composite yarn and method for making the same |
October 13, 1987 |
| A continuous process of making a blended yarn of staple fiber and long-fiber or filamentary material in which the long-fiber or filamentary material is passed through a rupture zone to produce lengths thereof which are fed directly into an air stream with the staple fibers to produce an |
| 4680576 |
Photoelectric smoke detector and alarm system |
July 14, 1987 |
| An improved photoelectric smoke detector and alarm system which may be incorporated in a single station, completely self-contained unitary structure, or which may be incorporated in a multi-station detector system that is capable of self-contained operation but which can also be inte |
| 4677977 |
Mask for pressure breathing |
July 7, 1987 |
| A face mask for pressure breathing. The mask has a body with a sealing boundary shaped to fit over the bridge of a wearer's nose, downward past the sides of his nose and mouth and across his mental protuberance. The sealing boundary includes a reflective primary seal and a secondary seal |
| 4676236 |
Helmet airflow system |
June 30, 1987 |
| An airflow system for use with a helmet includes a face piece adapted to enclose the eyes of the wearer to form a first cavity and to enclose the nose and mouth of the wearer to form a second cavity isolated from the first cavity. Filtered air normally flows through an inlet to the first |
| 4607383 |
Throat microphone |
August 19, 1986 |
| A throat microphone has an outer resonant diaphragm which is adapted to be secured against the throat of a wearer and which cooperates with a housing to form an outer chamber. An electret microphone element disposed inside the outer chamber includes an electret diaphragm acoustically cou |
| 4596056 |
Helmet shell fabric layer and method of making the same |
June 24, 1986 |
| A ballistic helmet shell layer in which a plurality of identical fabric segments, each formed with a pointed end and an arcuate end on the locus of a circle having its center at the pointed end, first are laid flat with portions of the edges extending from the pointed ends of adjacent se |
| 4580875 |
Electronic control system for automatic rearview mirrors for automotive vehicles |
April 8, 1986 |
| An electronic control system for automatic rearview mirrors for automotive vehicles, the control system being effective to detect and compare the relative brightness of light forwardly and rearwardly of the vehicle and respond automatically to annoying glare from the rear of the vehicle |
| 4550059 |
Method of forming a tintable abrasion-resistant coating on a substrate and article produced ther |
October 29, 1985 |
| A tintable abrasion-resistant coating is formed on a substrate such as a lens or other optical article by applying a radiation-curable coating to the surface of the substrate and partially curing the applied coating by exposure to radiation so as to produce from about 20% to about 80% |
| 4523661 |
Earphone system for use in large-cavity earcups |
June 18, 1985 |
| 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 forms a sound-attenuating cavity havi |
| 4508936 |
Local external communication system |
April 2, 1985 |
| A local external communication system for use by a person wearing a mask covering the nose and mouth and in sealing engagement with the face in which an assembly secured to the outer surface of the mask without in any way affecting the integrity of the mask seal generates an output signa |
| 4488777 |
Remotely actuated rearview mirror for automotive vehicles |
December 18, 1984 |
| An improved inside rearview mirror for automotive vehicles, the mirror including a reflective element having a full reflectance mode and a partial reflectance mode, and also incorporating improved means including a conveniently situated, manually actuatable electrical switch for inde |
| 4475036 |
Dual photoelectric cell assembly |
October 2, 1984 |
| A dual photoelectric cell assembly incorporating a unitary dual element photoelectric cell having first and second light sensing areas, the assembly also including a plurality of light reflecting surfaces. The dual element photoelectric cell and the reflecting surfaces are potted in |
| 4443666 |
Electret microphone assembly |
April 17, 1984 |
| An electret microphone assembly in which an insulating support disposed between the apertured front and back walls of a conductive housing has an enclosed portion contained in the housing and an exposed portion extending out of the housing through an opening formed in the side wall there |
| 4443057 |
Automatic rearview mirror for automotive vehicles |
April 17, 1984 |
| An improved inside rearview mirror particularly adapted for use with automotive vehicles, the mirror incorporating improved means for detecting and comparing the relative brightness of light forwardly and rearwardly of the vehicle and improved means responding automatically to annoying g |
| 4439645 |
Sound attenuating earcup assembly with outside communication capability |
March 27, 1984 |
| A sound attenuating earcup assembly having ambient communication capability without the necessity of removing the assembly in which a cup or shell adapted to fit over the wearer's ear is made of a relatively hard sound attenuating material and is formed with three wall openings each exte |
| 4432099 |
Individually fitted helmet liner |
February 21, 1984 |
| An individually fitted helmet liner includes a plurality of superposed contacting layers, each of which consists of a thermoplastic sheet formed with an array of pockets which are open and unfilled to allow their deformation in response to compressive contact with an adjacent layer. The |
| 4412358 |
Individually fitted helmet liner and method of making same |
November 1, 1983 |
| An individually fitted helmet liner includes a plurality of layers, each of which consists of a thermoplastic sheet formed with an array of pockets receiving the major portions of energy-absorbing spheres, the spheres of one layer being in register with the spaces between the spheres of |
| 4374301 |
Local external communication device for enclosed helmet and mask assembly |
February 15, 1983 |
| A local external communication system for use with an enclosed helmet and mask assembly covering the head, ears, nose and mouth of the wearer and provided with earphones and a microphone and a plug for connection with a radio or intercom system, in which a housing adapted to be carried o |
| 4345338 |
Custom-fitted helmet and method of making same |
August 24, 1982 |
| A custom-fitted helmet in which a preformed elastomer sack containing a resin-bead composite adapted to rigidify in response to mechanical deformation accommodates a single rigid outer shell to various individual head sizes. The underside of the sack is formed with circular channels |
| 4325058 |
Pre-intrusion detection and alarm system |
April 13, 1982 |
| A self-contained pre-intrusion detection and alarm system for doors and other closures, the system including an rf oscillator circuit incorporating a tank circuit which includes an antenna. The system also includes a detection and processing circuit effective to detect and amplify a |
| 4310225 |
Ophthalmic lens series |
January 12, 1982 |
| An ophthalmic prescription lens series in which each lens has a concave rear base curve selected from a family of curves, differing in nominal power by steps of 0.50 D, in such a manner as to minimize the maximum in absolute value of the astigmatic error for distant points, the positive |
| 4290149 |
Method of making an individually fitted helmet |
September 22, 1981 |
| An individualized helmet assembly and method of and apparatus for making the same in which a helmet liner having a plurality of apertures is removably secured inside a fixture in the form of a rigid template simulating a helmet shell and having apertures registering with the aperture |
| 4239106 |
Individually fitted helmet and method of and apparatus for making the same |
December 16, 1980 |
| An individualized helmet assembly and method of and apparatus for making the same in which a helmet liner having a plurality of apertures is removably secured inside a fixture in the form of a rigid template simulating a helmet shell and having apertures registering with the aperture |
| 4231117 |
Helmet assembly for accurately positioning visual display system |
November 4, 1980 |
| A helmet assembly which accurately positions a portable visual display unit carried by the helmet shell thereof in a predetermined position relative to the eye of the wearer. The outer shell and an inner helmet assembly adapted to fit relatively closely over the wearer's head each have |
| 4181818 |
Personal amplifier system |
January 1, 1980 |
| A personal amplifier system wherein sound attenuating ear defenders provided with earphones ideally exclude all airborne sound and permit only electronically reproduced sound to be heard. A pair of spaced microphones are coupled to the earphones through amplifying channels, the gains of |
| 4170042 |
Readily releasable powered visor-and-lock assembly for helmet |
October 9, 1979 |
| A readily releasable powered visor-and-lock assembly for a helmet in which the visor is spring-biased for movement from a raised position behind a cover plate spaced from the helmet shell to a lowered position in front of the upper portion of the wearer's face. The cover plate is formed |
| 4136265 |
Hand-held microphone assembly |
January 23, 1979 |
| A hand-held microphone assembly for use with two-way communications equipment in which an electret-capacitor microphone is mounted in the upper surface of the barrel portion of a pistol-shaped casing. A push-to-talk trigger disposed at the end of the barrel actuates a double-pole, do |
| 4132861 |
Headset having double-coil earphone |
January 2, 1979 |
| 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 to receive sounds from the su |
| 4087653 |
Sound attenuating earcup assembly provided with receivers and contact microphone |
May 2, 1978 |
| A head gear assembly including first and second sound attenuating earcups and means for supporting the earcups over the ears of a wearer and in which each of said earcups has an earphone therein, one of said earcups has a contact microphone therein and switch means is provided for enabli |
| 4023209 |
Protective helmet assembly with segmental outer shell |
May 17, 1977 |
| A protective helmet assembly includes a flexible inner helmet designed to fit relatively closely over a wearer's head and fitted with one or more impact-absorbing pads, and a hard rigid ballistic outer shell comprising a frontal portion releasably secured over the forehead area of the in |
| 3994023 |
Simplified protective helmet assembly |
November 30, 1976 |
| A simplified protective helmet of the type in which a molded relatively rigid frame for supporting the helmet headband, chin strap and crown assemblies is formed with an upwardly opening outer peripheral channel for receiving the edge of an outer ballistic shell and with a continuous |
| 3952295 |
Alarm system for cargo box |
April 20, 1976 |
| An alarm system for a cargo box made up of a plurality of panels adapted to be assembled to form the box, in which each panel is provided with a conductor distributed throughout the panel, and in which the conductors of adjacent panels are connected in series when the box is assembled to |
| 3943572 |
Helmet retention system |
March 16, 1976 |
| A protective helmet having a rigid shell with a headband and crown suspension system and provided with readily adjustable sound-attenuating earcup assemblies, in which right and left hand flexible fabric earcup assembly supports are secured at locations adjacent to the upper ends the |
