Engine synchronizing mechanism

Claim 1

A CONTROL ASSEMBLY FOR CONTROLLING THE ROTATIONAL SPEED OF MASTER AND SLAVE PRIME MOVERS HAVING MASTER AND SLAVE CONTROL MECHANISMS, RESPECTIVELY, OPERABLE FOR DETERMINING THEIR SPEEDS, COMPRISING: FIRST MEANS CONNECTED TO THE MASTER CONTROL MECHANISM AND BEING SELECTIVELY ACTUABLE FOR ACTUATING THE MASTER CONTROL MECHANISM, SECOND MEANS CONNECTIBLE TO THE SLAVE CONTROL MECHANISM OF THE SLAVE PRIME MOVER AND BEING SELECTIVELY ACTUABLE WHEN CONNECTED FOR ACTUATING THE SLAVE CONTROL MECHANISM, A ROTATABLE MEMBER, DIFFERENTIAL GEAR MEANS INCLUDING SAID ROTATABLE MEMBER AND CONNECTED TO THE MASTER AND SLAVE PRIME MOVERS FOR SENSING THEIR SPEEDS AND FOR PROVIDING A FIRST ROTATIONAL SIGNAL VARYING IN MAGNITUDE IN ACCORDANCE WITH VARIATIONS IN THE MAGNITUDE OF THE ROTATIONAL SPEED OF THE MASTER AND A SECOND ROTATIONAL SIGNAL VARYING IN MAGNITUDE IN ACCORDANCE WITH VARIATIONS IN THE MAGNITUDE OF THE ROTATIONAL SPEED OF THE SLAVE AND FOR PROVIDING ROTATION OF SAID ROTATABLE MEMBER IN ONE DIRECTION RESPONSIVELY TO THE MAGNITUDE OF SAID FIRST SIGNAL EXCEEDING THAT OF SAID SECOND SIGNAL AND IN AN OPPOSITE DIRECTION RESPONSIVELY TO THE MAGNITUDE OF SAID SECOND SIGNAL EXCEEDING THAT OF SAID FIRST SIGNAL, CONNECTING MEANS ACTUABLE FOR CONNECTING SAID ROTATABLE MEMBER TO THE SLAVE CONTROL MECHANISM AND FOR ACTUATING THE SLAVE CONTROL MECHANISM FOR INCREASING AND DECREASING THE ROTATIONAL SPEED OF THE SLAVE PRIME MOVER IN ACCORDANCE WITH ROTATION OF SAID ROTATABLE MEMBER IN SAID ONE AND OPPOSITE DIRECTIONS, RESPECTIVELY, AND ACTUATING MEANS SELECTIVELY ACTUABLE TO ONE CONDITION FOR CONNECTING SAID SECOND MEANS TO THE SLAVE CONTROL MECHANISM AND FOR DEACTUATING SAID CONNECTING MEANS AND TO A SECOND CONDITION FOR DISCONNECTING SAID SECOND MEANS FOR THE SLAVE CONTROL MECHANISM AND FOR ACTUATING SAID CONNECTING MEANS.