The Specific Adjusting Machine

History of The Specific Adjusting Machine (cont.)

Dr. Zimmerman's practice grew rapidly and there were two engineers, former Stanford classmates, among his patients. As early as 1941, Zimmerman discussed with them the possibility of developing a machine to adjust the upper cervical vertebrae. These men encouraged him to pursue the idea. They proposed two machine designs for duplicating the motion of the hands in making an adjustment.

In 1947, the number of patients in Dr. Zimmerman's practice had increased to slightly over 5, 000. Also there had been a gradual increase in the time between adjustments for patients; but the problem in his own neck had not yet been solved.


Dr. Luigi H. Canepa, D.C.
1160 Homestead Road
Santa Clara, CA 95050


Telephone: (408) 244-6335


In the summer of 1947, Dr. Zimmerman discussed with an engineer the idea of making a time-motion study of hand adjustments. After much planning, high-speed pictures were taken by Three Crown Productions under the direction of two engineers. 'Analysis of "Specific Adjustments"', was the resulting twenty-seven page report to determine exactly what Dr. Zimmerman was doing, by hand, in making adjustments on the atlas (or axis) vertebra.

This study was an exhaustive investigation into what happened when an adjustment was made by hand. High-speed motion pictures were made of patients being adjusted by hand. In the first high-speed film sequence, Dr. Zimmerman's hands, the patient's neck, a stop watch and depth gauge were in view. This facilitated exact measurements of time, speed and motion of the hand adjustments on the patient's neck. Six such sequences were run on different patients. Some with thin necks, some with thick necks, some male, some female.


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