driven arms specifically arms 67 and 68 support one end of scale housing 66 while arms 79 and 80 support the same side of scale housing 66 as arms 67 and 68 but on the opposite end see fig1 similarly arms 69 and 70 support the end of scale housing 66 across from arms 67 and 68 while a fourth set of arms not shown support the same side of scale housing 66 as arms 69 and 70 but on the opposite end scale 65 further includes motor 71 which drives arms 67 68 79 and 80 and motor 72 which drives arms 69 and 70 and their corresponding arms not shown connected at the corner on the same side of scale housing 66 as arm 69 and 70 motor 71 mounts onto frame 17 and connects to drive shaft 81 to raise and lower arms 67 68 79 and 80 drive shaft 81 functions to transfer the driving force of motor 71 to arms 68 and 80 arms 68 and 80 include sleeves 73 and 74 respectively which slide over drive shaft 81 and rigidly connect to drive shaft 81 using any suitable means such as a screw or allen nut see fig1 the opposite end of arm 68 pivotally connects to one end of arm 67 utilizing pin 75 and clip 76 additionally the opposite end of arm 67 connects to scale housing 66 using pin 77 and clip 78 arm 79 connects to arm 80 which in turn connects to scale housing 66 using similar pins and clips although the connection among motor 72 the drive shaft for motor 72 arms 69 and 70 and the fourth set of.