Abstract: A control system for a chiropractic adjustment instrument comprising a microprocessor programmable to control various parameters of an adjustor head to be driven against the spinal vertebrate of a patient. A solenoid is associated with the adjustor head which is energized by a capacitor. The capacitor is charged by a charging circuit to the programmed voltage level. The pressure of the adjustor head against the patient is sensed and when the pressure reaches a predetermined level, the capacitor is discharged to the solenoid to drive the adjustor head against the spinal vertebrate of the patient.

Abstract: A chiropractic adjustor for applying an adjustment energy to a patient through a plunger having a resilient or cushioned head with the energy applied to the plunger being supplied by a solenoid assembly capable of producing an adjustable and reproducible energy or force that is transferred from the solenoid to the cushioned plunger thereby providing a chiropractic adjustor that is solenoid operated and capable of providing precisely reproducible energy settings over a wide range and the capability of providing a reproducible energy level and a reproducible contact energy or force between the adjustor and patient.