Thermal time delay relay for switching and protecting start and phase windings of motors

Claim 1

A SWITCHING DEVICE COMPRISING A BASE; SAID NORMALLY CLOSED CONTACT AND SAID NORMALLY OPEN CONTACT BEING MOUNTED ON THE BASE; A PAIR OF NORMALLY CLOSED CONTACTS; A PAIR OF NORMALLY OPEN CONTACTS; A CREEP-ACTING THERMALLY RESPONSIVE ELECTRICALLY CONDUCTIVE MEMBER MOUNTED ON THE BASE AND; A CONTACT-CARRYING MEMBER MOUNTED ON THE BASE HAVING FIRST AND SECOND PORTIONS, SAID FIRST PORTION MOUNTING ONE OF SAID NORMALLY CLOSED CONTACTS FOR MOVEMENT AWAY FROM THE OTHER OF SAID NORMALLY CLOSED CONTACTS IN RESPONSE TO MOVEMENT OF SAID THERMALLY RESPONSIVE MEMBER IN ONE DIRECTION UPON THE LATTER BEING HEATED TO A FIRST PREDETERMINED AMOUNT BY THE FLOW OF CURRENT THERETHROUGH, SAID SECOND CONTACT-CARRYING MEMBER PORTION ALSO MOUNTING ONE OF SAID NORMALLY OPEN CONTACTS FOR MOVEMENT INTO ENGAGEMENT WITH THE OTHER OF SAID NORMALLY OPEN CONTACTS IN RESPONSE TO FURTHER MOVEMENT OF SAID THERMALLY RESPONSIVE MEMBER IN SAID ONE DIRECTION UPON THE LATTER BEING HEATED TO ANOTHER PREDETERMINED AMOUNT BY THE CURRENT FLOW THERETHROUGH TO SHUNT OUT SAID THERMALLY RESPONSIVE MEMBER UPON MUTUAL ENGAGEMENT OF SAID NORMALLY OPEN CONTACTS, ONE OF SAID FIRST AND SECOND PORTIONS OF SAID CONTACT-CARRYING MEMBER BEING ENGAGED BY SAID THERMALLY RESPONSIVE MEMBER FOR MOVEMENT THEREWITH; MEANS ELECTRICALLY INSULATING AND INTERCONNECTING ONE OF SAID FIRST AND SECOND PORTIONS OF SAID CONTACT-CARRYING MEMBER TO SAID THERMALLY RESPONSIVE MEMBER AND OVER CENTER SPRING MEANS INTERCONNECTING SAID FIRST AND SECOND SAID CONTACT-CARRYING MEMBER PORTIONS FOR SNAP MOVEMENT OF ONE OF SAID FIRST AND SECOND PORTIONS RELATIVE TO THE OTHER IN RESPONSE TO FIRST PREDETERMINED MOVEMENT OF THE THERMALLY RESPONSIVE MEMBER AND FOR CREEP-MOVEMENT OF ONE OF SAID FIRST AND SECOND CONTACT-CARRYING PORTIONS RELATIVE TO THE OTHER IN RESPONSE TO SECOND PREDETERMINED MOVEMENT OF SAID THERMALLY RESPONSIVE MEMBER.