Fibre optic security and communications link
First Claim
1. A body strap for retaining a radio frequency beacon disposed in a housing to a body, comprising an optical fiber for encircling a body part, the housing having at least one light transmissive wall region, the ends of the optical fiber abutting an outside surface of said wall region, means for applying light energy to an inside surface of said at least one wall region whereby said light energy may be coupled through said wall region of the housing into one end of the optical fiber, and said coupled light energy may be received in the housing through said at least one wall region of the housing from the other end of the fiber.
12 Assignments
0 Petitions
Accused Products
Abstract
A beacon is contained in a waterproof housing which is devoid of any electrical contact points. At a location at which a signal is to be applied to or received from the beacon, the housing is made sufficiently thin to allow light to pass therethrough. A light energy transmitter coupled to receive the signal to be transmitted into or out of the housing is located immediately adjacent or abutted against the translucent portion of the housing. A light energy receiver is similarly disposed adjacent or abutted against the other side of the housing, to receive the light energy. In this manner no electrical contacts need pass through the housing, and the beacon circuit is entirely protected by the waterproof housing, from water, soap, sweat, body oils, etc.
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Citations
14 Claims
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1. A body strap for retaining a radio frequency beacon disposed in a housing to a body, comprising an optical fiber for encircling a body part, the housing having at least one light transmissive wall region, the ends of the optical fiber abutting an outside surface of said wall region, means for applying light energy to an inside surface of said at least one wall region whereby said light energy may be coupled through said wall region of the housing into one end of the optical fiber, and said coupled light energy may be received in the housing through said at least one wall region of the housing from the other end of the fiber.
- 2. A beacon and comparator disposed in a housing for attachment to a person or object, comprising a strap retaining an optical fiber for encircling a body part or said object with said strap, the housing having at least one light transmissive wall region, the ends of the optical fiber being abutted to an outside surface of said at least one wall region of the housing, means for generating light energy inside the housing adjacent an inside surface of said wall region for transmission through said at least one wall region into one end of the optical fiber, and means in the housing for receiving said light energy from the other end of the fiber through said at least one wall region, whereby a comparison may be made by the comparator of the generated and received light energy and thus the presence, absence of malfunction of the optical fiber determined.
- 9. A waterproof housing for retaining and protecting an electronic circuit, the housing having at least one wall portion which is comprised of translucent material, and means for coupling light energy modulated with a signal to be transmitted out of said housing or into said housing via said translucent material from one side of said translucent material to the other, disposed adjacent one side of said translucent wall portion, and means for receiving said light energy disposed adjacent the other side of said translucent wall portion, whereby said light energy may be coupled through the material of said translucent wall portion of said waterproof housing.
Specification