Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Having electrical actuator
Patent
1987-07-13
1988-09-13
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Having electrical actuator
623 53, 623 57, A61F 248, A61F 268
Patent
active
047706627
ABSTRACT:
A sensory input discrimination system for use with a prosthetic limb such as a prosthetic hand having five digits. The discrimination system includes pairs of sonic frequency generators in electrical communication with pressure transducers which are disposed proximally to each other and within the extremity of corresponding digits of the prosthetic hand, the frequency generators having discrete sonic frequencies. The electrical communication between each frequency generator and the pressure sensor is open in the absence of contact pressure, and closed in the presence of contact pressure. Such closure generates a discrete sonic frequency output from the digit to which the contact pressure has been applied. In the prosthesis, a power unit amplifies the frequency outputs and provides power for the operation of the frequency generators and pressure transducers. The power unit exhibits an output including a voltage and a sonic frequency. The sonic output signal of the power unit is placed into sonic proximity of a sonic contact in, and vibratory receptors on, a bone stump, both at the amputation site corresponding to the connection of the prosthetic limb. Such receptors will generate neutral impulses having a signal pattern correlative to the sonic output signlas of the power unit, thus producing impulses which will travel from the stump to the posterior columns of the spinal cord and, therefrom, to the brain where discrimination of the impulses generated by the sonic signals will be accomplished to recognize the digit-location of the pressure-related stimuli.
REFERENCES:
patent: 2582234 (1952-01-01), Conzelman, Jr. et al.
patent: 3751733 (1973-08-01), Fletcher et al.
patent: 3820168 (1974-06-01), Horvath
Frinks Ronald L.
Silverman Melvin K.
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