Wearable transmitter with optical tamper detection

A transmitter assembly including a tamper detection circuit and attachable to a buckle for completing said circuit optically around an appendage of an individual;

• said assembly comprising:
• a housing defining a chamber and a side of said housing having at least one aperture from said chamber through said side;
• means supporting said tamper detection circuit in said chamber, said tamper detection circuit including a light emitter and a light sensor projecting through said at least one aperture in said housing side;
• means for sealing said chamber closed against water, including said at least one aperture;
• and,
• means on said side of said housing for pivoting said housing into latched position on the buckle, said pivoting completing said circuit optically from said emitter around the appendage to said sensor.

A transmitter assembly wearable on an appendage of an individual and comprising:

• a housing defining a chamber and at least one aperture from said chamber through said housing;
• a tamper detection circuit in said chamber, said tamper detection circuit including a light emitter and a light sensor extending through said at least one aperture in said housing;
• means for sealing said chamber closed against water, including said at least one aperture;
• a strap including first and second ends and an optical fiber running through said strap from said first end to said second end;
• and,
• a buckle including a) locating means independent of said housing for locating said first and second ends in first and second predetermined positions on said buckle, and b) fastening means for securely fastening said transmitter to said band with said optical fiber completing an optical circuit between said emitter and said sensor.