Safety switch device
AssigneeK. A. Schmersal GmbH & Co.
InventorHelmut Letzel
Life of this patent
Estimating the term…
Abstract
A safety switch device for monitoring the position of a protective cover, the cover being pivotable about an axis into and out of a closed position. The safety switch device includes a fixed position switch unit which houses at least a first electrical signal generator which will be switched between states in response to movement of the protective cover from the closed position, the signal generator being operated by an actuator which rotates about an axis. The switch device also includes a fastener element which is adjustably mountable to the protective cover and an articulated mechanical coupling which extends between the fastener element and the signal generator actuator, the coupling element being movable in at least two planes.
Claims20
In a safety switch device for generating signals commensurate with the position of a protective cover which is pivotal about an axis, the switch device including at least a first electrical signal generator, the position of the signal generator relative to the axis about which the cover pivots being fixed, the switch device further having an actuator which rotates about an axis, rotation of the actuator between first and second positions causing the signal produced by the signal generator to change, the improvement comprising:
- a fastening element;
- means for affixing said fastening element to said pivotal protective cover whereby the fastening element will be positioned on and move with the cover;
- and
- motion transmitting means connected to said fastening element and to the actuator of the switch device for establishing an articulated mechanical connection between said fastening element and the actuator of the switch device, said motion transmitting means being movable in at least two planes whereby the position of said fastening element on the protective cover is independent of the axis about which the protective cover pivots and alignment of the axis of rotation of the switch actuator with the connection between said motion transmitting means and said fastening element is not required.
A safety switch device for generating signals commensurate with the position of a protective cover, the cover being pivotal about an axis between open and closed positions, said safety switch device comprising:
- at least first and second electrical switches, each of said switches having at least two states whereby each of said switches will provide at least two output signals, the positions of said switches relative to the axis about which the protective cover rotates being fixed;
- a first actuator cam for controlling the state of said first switch, said first actuator cam being rotatable about an axis;
- a second actuator cam for controlling the state of said second switch, said second actuator cam being rotatable about the same axis as said first actuator cam, said first and second actuator cams being axially displaced from one another along their common axis of rotation;
- a fastening element;
- means for affixing said fastening element to a pivotal protective cover whereby the fastening element will be positioned on and move with the cover;
- and
- motion transmitting means connected to said fastening element and to said cams for establishing an articulated mechanical connection between said fastening element and said first and second actuator cams, said motion transmitting means being movable in at least two planes whereby the position of said fastening element on the protective cover is independent of the axis about which the protective cover pivots and alignment of the axis of rotation of said actuator cams with the connection between said motion transmitting means and said fastening element is not required.
In a safety switch device for generating signals commensurate with the position of a protective cover which is pivotal about an axis, the switch device including at least a first electrical signal generator, the position of the signal generator relative to the axis about which the cover pivots being fixed, the switch device further having an actuator which rotates about an axis, rotation of the actuator between first and second positions causing the signal produced by the signal generator to change, the improvement comprising:
- a fastening element;
- an axle mounted in said fastening element, a first end of said axle projecting from said fastening element;
- means for preventing relative rotation between said axle and said fastening element, said rotation preventing means securing said axle to said fastening element and permitting selection of the length of said axle first end which projects from said fastening element;
- means for affixing said fastening element to a pivotal protective cover whereby the fastening element will be positioned on and move with the cover;
- and
- motion transmitting means connected between said first end of said axle and to the actuator of the switch device for establishing an articulated mechanical connection between said axle and the actuator of the switch device, said motion transmitting means engaging said first end of said axle and being movable in at least two planes whereby the position of said fastening element on the protective cover is independent of the axis about which the protective cover pivots and alignment of the axis of rotation of the switch actuator with the connection between said motion transmitting means and said axle is not required.
Dependencies are inferred from the claim text.