Spring balance with load support incorporating two springs - has one spring which is disconnectable and adjustable and has parallel linkage

摘要

The balance has a load support guided by parallel linkage, two weighing springs for different weighing ranges, and a switch for connection and disconnection of the second spring. One end of the second spring is connected to a swivelling support, and the other to the load support when it is connected. The spring support (31) can be moved in steps by the switching device (27), so that the second spring (26) can have at least two definite pretensioned or not pretensioned states when connected to the load support (14).