The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1977
Filed:
May. 27, 1975
Michael E Halleck, Boulder, CO (US);
Thomas H Thomson, Longmont, CO (US);
Staodynamics, Inc., Longmont, CO (US);
Abstract
A transcutaneous nerve stimulator as disclosed that is useful for suppression of organic pain. The stimulator device is relatively small in overall dimensions and is therefore portable yet provides a rectangular waveform with the output signal produced being sufficient to drive a capacitive resistance load of at least 2.2K ohms in parallel with 0.1Mfd with a maximum rise and fall time of 12 microseconds. The device is powered by a pair of NI-CD batteries providing a 2.5 volt input and produces a maximum 80 volt peak pulse output having a maximum duration of .10 milliseconds at a pulse rate between 20pps and 180pps. Potentiometers are provided to vary the pulse rate, the duty cycle, and output pulse amplitude as is necessary or desirable for a particular patient. The device includes an oscillator that controls the pulse rate of the output from a variable one-shot multivibrator with the output pulses from the multivibrator being coupled through a power amplifier to the primary winding of a step-up transformer, the secondary winding of which transformer is connected through a voltage clamp and variable I.E. mode circuit to the output leads from the device. The disclosed method includes generating a rectangular waveform and producing an output that is sufficient to drive a capacitive resistance load of at least 2.2K ohms in parallel with 0.1Mfd with a maximum rise and fall time of 12 microseconds.