Rapid-stopping system for transmissions

Claim 2

A rapid-stopping installation for an electric range selector mechanism in an automatic transmission having a selector lever to be displaced into a position adjusted at a pre-selector means, characterized in that a permanent magnet motor means is drivingly connected with the selector lever, said motor means being an oxide magnet motor and having supply terminals for connection with a power supply voltage, and in that de-energization of the oxide magnet motor upon reaching the pre-selected selector lever position is coupled with control circuit means for immediately short-circuiting its supply terminals, said control circuit means controlling the energization and de-energization of said motor and including two relay means being operable as shifting relays for the reversal of the direction of rotation of said motor, said two relay means each having a movable contact member adapted to connect a first fixed contact point selectively with one of two other contact points, one of the two other contact points of each relay means corresponding to the same condition of energization of the respective relay means being connected with each other and with one supply terminal while the other of the two contact points of each of the two relay means are connected to the other supply terminal, said fixed contact points being connected with the armature of the motor means so that in the de-energized condition of the two relay means the armature is short-circuited to effect braking of said motor, said two relay means being arranged for simultaneous de-energization and energization so that in both the de-energized and energized conditions of said two relay means, the armature is short-circuited to effect braking of said motor.

Claim 3

An installation according to claim 1, characterized in that a hydraulic control slide valve means is actuated by way of the selector lever.

Claim 4

An installation according to claim 2, characterized in that a transmission means with a relatively large transmission ratio is provided between the rotating shaft of the motor and the control slide valve means so that rotation of the motor during braking does not adversely affect the position of the control slide valve means.

Claim 5

An installation comprising an automatic transmission, a selector lever for controlling the automatic transmission in accordance with the position thereof, preselector means for preselecting a desired position for the selector lever, permanent magnet motor means drivingly connected with the selector lever, said motor means being an oxide magnet motor having supply terminals for connection with a power supply voltage and being energized for controlling the positioning of the selector lever in accordance with the preselected selector lever position, the de-energization of the motor upon reaching the preselected selector lever position being coupled with control circuit means for immediately short-circuiting the supply terminals of said motor means, said control circuit means controlling the energization and de-energization of said motor and including two relay means being operable as shifting relays for the reversal of the direction of rotation of said motor, means for energizing and de-energizing said two relay means individually or together, said two relay means each having a movable contact member adapted to connect a first fixed contact point selectively with one of two other contact points, one of the two other contact points of each relay means corresponding to the same condition of energization of the respective relay means being connected with each other and with one supply terminal while the other of the two contact points of each of the two relay means are connected to the other supply terminal, said fixed contact points being connected with the armature of the motor means so that in both the de-energized and energized conditions of the two relay means the armature is short-circuited to effect braking of said motor.

Claim 6

An installation comprising an automatic transmission, a selector lever for controlling the automatic transmission in accordance with the position thereof, preselector means for preselecting a desired position for the selector lever, permanent magnet motor means drivingly connected with the selector lever, said motor means being an oxide magnet motor having supply terminals for connection with a power supply voltage and being energized for controlling the positioning of the selector lever in accordance with the preselected selector lever position, the de-energization of the motor upon reaching the preselected selector lever position being coupled with control circuit means for immediately short-circuiting the supply terminals of said motor means, said control circuit means controlling the energization and de-energization of said motor and including two relay means being operable as shifting relays for the reversal of the direction of rotation of said motor, means for energizing and de-energizing said two relay means individually or together, said two relay means each having a movable contact member adapted to connect a first fixed contact point selectively with one of two other contact points, one of the two other contact points of each relay means corresponding to the same condition of energization of the respective relay means being connected with each other and with one supply terminal while the other of the two contact points of each of the two relay means are connected to the other supply terminal, said fixed contact points being connected with the armature of the motor means so that in both the de-energized and energized conditions of the two relay means the armature is short-circuited to effect braking of said motor.

Claim 7

An installation according to claim 4, further comprising a control means actuated by the selector lever.

Claim 8

An installation according to claim 5, wherein said control means is a hydraulic control slide valve means.