Hand development apparatus

A hand development apparatus comprising:

• a first housing having an interior cavity formed therein, said first housing comprising:
• a first housing portion having a first pair of sides substantially parallel to each other and a second pair of sides substantially parallel to each other, one of said sides of said first pair being disposed at an acute angle relative to one of said sides of said second pair, said first housing portion having a first width measured between two of said substantially parallel sides;
• a second housing portion which extends from said first housing portion;
• a first gripping surface coincident with one of said sides of said first housing portion;
• and
• a second gripping surface disposed on said second housing portion, said first and second gripping surfaces being adapted to fit the palm of a person's hand;
• a second housing having an interior cavity formed therein, said second housing wherein a person can selectively use one of said first and second housings that best fits the person's hand comprising:
• a first housing portion having a first pair of sides substantially parallel to each other and a second pair of sides substantially parallel to each other, one of said sides of said first pair being disposed at an acute angle relative to one of said sides of said second pair, said first housing portion of said second housing having a second width measured between two of said substantially parallel sides of said second housing, said second width being substantially different than said first width;
• a second housing portion which extends from said first housing portion of said second housing;
• a first gripping surface coincident with one of said sides of said first housing portion of said second housing;
• and
• a second gripping surface disposed on said second housing portion of said second housing, said first and second gripping surfaces of said second housing being adapted to fit the palm of a person's hand;
• a carrier alternately removably disposed within said interior cavity of one or the other of said first and second housings;
• a plurality of movable elements carried by said carrier, said movable elements being adapted to accommodate the fingers of a person's hand and being movable along a movement direction, said movable elements being carried by said carrier in a staggered relationship wherein each of said movable elements lies at a different position with respect to a plane perpendicular to said movement direction;
• and
• a spring mechanism for resisting movement of each of said movable elements along said movement direction, said spring mechanisms being disposed in said carrier and each of said spring mechanisms including a spring and means for adjusting the compression of said spring.