Brake controller and short circuit probe disconnect

A brake control for brakes in towed vehicles and connected to a source of electrical energy comprising:

• a directionalized light source;
• a light intensity monitor in the path of said light source;
• an inertially activated adjustably positioned dampened cantilever beam having a path intermediate said light source and said monitor and positionally attenuating light from said light source to said monitor;
• a power circuit activated by said monitor and gated by said monitor in proportion to the amount of light sensed by said monitor;
• a gain control adjusting the gate threshold of said power circuit;
• an indicia designating the operative condition of said power circuit;
• a constant vigil probe circuit including a magnetically operated reed switch and capacitance timer actuated on amperage surge in the load through said power circuit on to external wiring and upon surge intermittently connecting and disconnecting said power circuit and actuating said indicia so long as said amperage surge continues thereby preserving said power circuit from damage.

A safety probe for external circuits in disabling protection for brake controllers and the like comprising:

• a feed of driving power to a probe circuit from a power source common to said controller;
• an electromagnetic coil in the power line of said controller;
• a reed switch activated by said coil at a load in excess of the normal power requirements;
• a capacitance in the line with said reed switch providing time interval means;
• and
• a transistor acting as a switch for intermittent probe of said power line at the interval selected by said capacitance and continuing intermittently to restoration of normal load levels.