Mechanical back scratcher

A back scratcher for use with a vertical wall and comprising:

• first and second vertical spaced parallel bars disposed in front of the wall and secured thereto in fixed position;
• a vertical hollow housing disposed between the bars and secured thereto;
• first and second vertical spaced parallel shafts disposed between the bars extending slidably through the housing, the top ends of the shafts being disposed above the housing, the bottom ends of the shafts being disposed below the housing, said shafts being movable vertically in their axial direction between a raised position and a lowered position at which the top ends of the shaft approach the housing;
• four coil springs, each spring being disposed concentrically about a corresponding shaft adjacent a corresponding end thereof, said springs being disposed outside of the housing;
• a horizontal track secured to both shafts and disposed inside the housing at the rear of the shafts, said track having a rear disposed horizontal groove;
• a rotatable vertical disc in the housing at the rear of the track;
• a horizontal stud secured at one end to the disc in an off center position, the other end of the stud engaging said groove;
• an electric motor disposed at the rear of the housing and having a horizontal drive shaft extending into said housing and secured to the center of the disc whereby rotation of the drive shaft imparts vertical reciprocating motion to said vertical shafts;
• and
• scratching means secured between the ends of the vertical shafts.