Speed limiter for lifts provided with catch device

The combination of a rotatable drive element for an elevator and apparatus for regulating the rotational speed of said drive element, the drive element being supported for rotation on, and about, a fixed shaft, comprising:

• annular braking means including first and second spaced parallel portions fixedly mounted on said shaft and biased together to form a clamping means, and an annular third portion, supported for rotation about said shaft and said first and second portions, said third portion including a radially outer engagement surface and a radially inner part disposed between and fractionally engaging said clamping means formed by said first and second portions,
• at least two annular means, disposed radially outwardly of said annular third portion, for selectively engaging said third portion engagement surface,
• pin means fixedly secured to said drive element for each of said engaging means, each of said engaging means being eccentrically supported by said pin means, in spaced relation to said drive element, for rotation about said pin means, whereby each of said engaging means can be rotated into a position of engagement with said third portion engagement surface, and
• centrifugal means, connected to each of said engaging means and supported for movement radially outwardly relative to said shaft in response to the rotational speed of said drive element, for rotating said engaging means about said pin means into said position of engagement when said rotational speed of said drive element exceeds a predetermined value,
• whereby when said predetermined speed is attained, and said engaging means is rotated into said position of engagement, said drive element is effectively connected with said third portion, and the frictional engagement of said third portion with said clamping means causes reduction of rotation of said drive element.