Arm type film bridge with minimal thermal zero shift

Claim 1

A FULL BRIDGE STRAIN GAGE, COMPRISING AN INSULATING BASE MEMBER, AND A STRAIN SENSITIVE ELECTROCONDUCTIVE FILM IN BONDED RELATION TO SAID BASE MEMBER, SAID FILM COMPRISING A PLURALITY OF STRAIN SENSITIVE RESISTANCE ARMS FORMING A FOUR-ARM BRIDGE PATTERN, WITH EACH END OF EACH ARM BEING COMPOSED OF DEPOSITED ELECTROCONDUCTIVE FILM AND SHARING A TERMINAL WITH THE END OF THE ADJACENT ARM, THE ADJACENT ARMS BEING ARRANGED IN RESPECTIVELY DIFFERENT ATTITUDES WITH RESPECT TO THE DIRECTION OF STRESS APPLIED TO SAID BASE MEMBER, A VOLTAGE SOURCE CONNECTED TO ONE OPPOSED PAIR OF TERMINALS, AND MEANS SENSING THE OUTPUT VOLTAGE AT THE OTHER OPPOSED PAIR OF TERMINALS, ONE PORTION OF EACH OF THE PAIR OF ADJACENT ARMS IN THE VICINITY OF THE COMMON TERMINAL THEREOF BEING COMPOSED OF AN ELECTROCONDUCTIVE MATERIAL HAVING A SUBSTANTIALLY DIFFERENT TEMPERATURE COEFFICIENT OF RESISTANCE THAN HAS THE ELECTOCONDUCTIVE MATERIAL MAKING UP THE REMAINDER OF THE SAID ADJACENT BRIDGE ARMS, SUCH COMMON TERMINAL BEING PLACED AT A POINT PROVIDING MINIMAL VARIATION IN BRIDGE OUTPUT WITH VARIATION IN TEMPERATURE.