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General Description of the Instrument
The SwingGuard Model 2-B swing indicator is different from all other swing indicators in several aspects. The Differences are due to a revolutionary gyro designed and produced by the SwingGuard manufacturer that eliminates the need for heavy flywheels, high speed gymbal bearings and pick-up contacts.

Most gyros are heavy and turn at 12,000 to 30,000 RPM or more. This is why the gyro bearings have a relatively short life.  To obtain this high speed, it is normally necessary to use a D.C. drive motor.  This requries brushes that require replacement periodically.  The gyro is normally mounted in a gymbal to which is attached a spring loaded pick-up contact. Bad Motor bearings, brushes, gymbal bearings, improperly adjusted or worn or dirty pick-up contacts  - all can cause erratic operation.  The size, weight and complexity of most swing indicators make it necessary to design two separate units - the gyro unit and the indicator unit, plus the necessary cabling between the two units.  When you have trouble with the swing indicator it is difficult to determine which unit is at fault.  Maintenance of this type of indicator is necessarily expensive.  Initial cost is also very expensive.

The SwingGuard Model 2-B uses a gyro that is A.C. driven at 3,000 RPM, weighs only a few ounces and does not require gymbal bearings, brushes, or pick-up contacts.  It also generates its own current for all other components of the indicator.  Over 90% of all wear, friction and other sources of trouble are therefore eliminated.  This makes a "single unit" design possible: 5" wide, 6.25" high, and approximately 7.5" from front to back which also makes this a very portable unit.