Apparatus for controlling an electric motor-actuated linear drive in the form of a furniture drive, for adjusting moveably mounted parts of lying and seating furniture, comprising - at least one drive train which is disposed in a housing and comprising an electric motor, a reducing transmission connected downstream thereof and a threaded spindle driveable by the transmission for displacement of a stroke element for raising and lowering the respective moveable furniture part, - a switchable claw coupling which is provided in the drive train and which is held in engagement by means of a spring mechanism, - a switching mechanism equipped with a switching element for opening and closing the claw coupling, and - a separately actuable blocking mechanism with which the claw coupling can be arrested in its opened position, characterised in that - the blocking mechanism has a blocking slider which is guided displaceably relative to the housing and is connected directly or indirectly to the switching element and is spring-loaded in the direction of the closed position of the switching element, - the blocking slider is displaceable with a separate actuating mechanism in opposition to the spring loading in the direction of the opened position of the claw coupling, - a latching element is provided on the blocking slider, - fixed moveably to the housing is a locking pawl which is latchable behind the latching element of the blocking slider when the slider has reached its position corresponding to the opened position of the claw coupling, and - in addition there is provided a sliding portion which is moveable relative to the housing and with which the locking pawl is releasable from the latching element in the lowered condition of the corresponding furniture part. - at least one drive train which is disposed in a housing and comprising an electric motor, a reducing transmission connected downstream thereof and a threaded spindle driveable by the transmission for displacement of a stroke element for raising and lowering the respective moveable furniture part, - a switchable claw coupling which is provided in the drive train and which is held in engagement by means of a spring mechanism, - a switching mechanism equipped with a switching element for opening and closing the claw coupling, and - a separately actuable blocking mechanism with which the claw coupling can be arrested in its opened position, - the blocking mechanism has a blocking slider which is guided displaceably relative to the housing and is connected directly or indirectly to the switching element and is spring-loaded in the direction of the closed position of the switching element, - the blocking slider is displaceable with a separate actuating mechanism in opposition to the spring loading in the direction of the opened position of the claw coupling, - a latching element is provided on the blocking slider, - fixed moveably to the housing is a locking pawl which is latchable behind the latching element of the blocking slider when the slider has reached its position corresponding to the opened position of the claw coupling, and - in addition there is provided a sliding portion which is moveable relative to the housing and with which the locking pawl is releasable from the latching element in the lowered condition of the corresponding furniture part.