Seven-speed planetary transmissions with a stationary interconnection

A multi-speed transmission comprising:

• an input shaft;
• an output shaft;
• first, second and third planetary gear sets each having first, second and third members;
• said input shaft being continuously interconnected with a member of said third planetary gear set, and said output shaft being continuously interconnected with another member of said third planetary gear set;
• a first interconnecting member continuously interconnecting said first member of said first planetary gear set with said first member of said second planetary gear set and with a stationary member;
• a second interconnecting member continuously interconnecting said second member of said first planetary gear set with said second member of said second planetary gear set;
• a first torque-transmitting mechanism selectively interconnecting a member of said first planetary gear set with a member of said third planetary gear set;
• a second torque-transmitting mechanism selectively interconnecting a member of said second planetary gear set with a member of said third planetary gear set;
• a third torque-transmitting mechanism selectively interconnecting another member of said first planetary gear set with a member of said third planetary gear set;
• a fourth torque-transmitting mechanism selectively interconnecting another member of said second planetary gear set with a member of said third planetary gear set;
• a fifth torque-transmitting mechanism selectively interconnecting a member of said first or second planetary gear set with a member of said third planetary gear set, said pair of members interconnected by said fifth torque-transmitting mechanism being different from the pair of members interconnected by said first, second, third or fourth torque-transmitting mechanisms;
• and
• a sixth torque-transmitting mechanism selectively interconnecting a member of said first, second or third planetary gear set with said stationary member or with another member of said first, second or third planetary gear set, said pair of members interconnected by said sixth torque-transmitting mechanism being different from the pair of members interconnected by said first, second, third, fourth or fifth torque-transmitting mechanisms;
• said torque-transmitting mechanisms being engaged in combinations of two to establish at least seven forward speed ratios and at least one reverse speed ratio between said input shaft and said output shaft.