Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means
Reexamination Certificate
1999-08-19
2001-08-21
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With monitoring, signalling, and indicating means
C187S414000
Reexamination Certificate
active
06276493
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a shaft magnet assembly for generating shaft information of an elevator installation, wherein at least one shaft magnet arranged in an elevator shaft changes the switching state of a magnet switch, which is arranged at an elevator cage, during travel of the elevator cage in the elevator shaft.
2. Discussion of the Prior Art
Magnets arranged in the elevator shaft serve, together with magnet switches arranged at the elevator cage, for the generation of shaft information. During travel of the elevator cage in the elevator shaft the magnet switches the magnet switch, which is usually constructed as a bistable switch, from one switching state into the other switching state, wherein the instantaneous position of the elevator cage in the elevator shaft is determined for the elevator control from the position of the relevant magnets. The magnets arranged, for example, in the region of stories of floors are usually arranged at fastening means, for example at rails with grooves, into which groove blocks are laid. The magnets are displaceable along the rails and are firmly screw-connected to the groove blocks of the rails by means of screws.
A disadvantage of the known equipment is in that expensive fastening means for the magnets is necessary in the region of each story, which causes substantial cost and mounting time.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a shaft magnet assembly which does not require expensive fastening means. Pursuant to this object, and others which will become apparent hereafter, one aspect of the present invention resides in a shaft magnet assembly having at least one shaft magnet that is arrangeable in the elevator shaft so as to change a switching state of a magnet switch which is arranged at the elevator cage during travel of the cage in the shaft. A holder is provided for holding the magnet in the shaft. The holder and/or the shaft magnet are arranged at a component of the elevator shaft without outside fastening means. The invention meets the object of avoiding the disadvantages of the known equipment and of bringing about a simplifying of the mounting of the shaft magnets.
The advantages achieved by the invention are essentially to be seen in that the means for mounting the magnets are cheap in manufacture and simple in mounting. Further, it is advantageous that the magnets can be mounted without effort at any desired shaft height.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, and specific objects attained by its use, reference should be had to the drawing and descriptive matter in which there are illustrated and described preferred embodiments of the invention.
REFERENCES:
patent: 1680675 (1928-08-01), Gale
patent: 1710066 (1929-04-01), Orcutt
patent: 1920590 (1933-08-01), Federsen
patent: 4203506 (1980-05-01), Richmon
patent: 5798490 (1998-08-01), Vairio et al.
patent: 1 203 436 (1965-10-01), None
patent: 54-122546 (1978-03-01), None
patent: 405254755 (1993-10-01), None
Cohen & Pontani, Lieberman & Pavane
Inventio AG
Salata Jonathan
LandOfFree
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