Permanent magnetic retaining device to move, affix or carry ferromagnetic parts or loads with electronic switching of the magnetic flux to release the carried load

• US 4,965,695 A
• Filed: 05/20/1988
• Issued: 10/23/1990
• Est. Priority Date: 05/22/1987
• Status: Expired due to Fees

• Current Assignee: Joseph D. Baumann
• Original Assignee: Joseph D. Baumann
• Inventors: Baumann, Joseph D.
• Primary Examiner(s): Pellinen, A. D.
• Assistant Examiner(s): Osborn, David
• Application Number:
  US07/197,046
• Time in Patent Office: 886 Days
• Field of Search: 361/139, 361/142, 361/143, 361/144, 361/145, 361/147, 361/152, 361/157, 361/159, 335/289, 335/290, 335/291, 335/295, 335/292, 335/294, 335/302, 340/666, 340/685, 340/825.06, 340/636, 341/176, 307/119
• US Class Current: 361/142
• CPC Class Codes: H01F 2007/208 combined with permanent magnets
• CPC Class Codes: H01F 7/04 Means for releasing the attractive force
• CPC Class Codes: H01F 7/206 Electromagnets for lifting, handling or transporting of magnetic pieces or material electromagnets for guidance of vehicles, workpieces B65G21/2009; for magnetic suspension or levitation H02N15/00
• CPC Class Codes: Y10S 294/907 Sensor controlled device

Abstract

Permanent magnetic retaining device to move, affix or carry ferromagnetic parts or load with electronic switching of the magnetic flux to release the carried load includes a central iron core enclosed by a pair of magnet blocks secured by iron shoes, laterally joined to reinforcing plates and terminated by lateral poles with one or more compensator coils being disposed on the central core, with a sliding cover above the former, moving on a pair of guide pins surrounded by mechanical force gauges, the cover being centrally provided with a lifter eyelet. An electronic control circuit is incorporated externally in one of the side walls of a rectangular enveloping overcover wherein, at the opposite side thereof, a sensor of the electronic circuit is incorporated, to be operated manually and/or by remote control.

Claims

1. A permanent magnet retaining device to move, affix or carry ferromagnetic parts or loads comprising:

a central iron core;

a pair of magnet blocks enclosing said central iron core;

a plurality of iron shoes connected to said magnet blocks and functioning to secure said magnet blocks;

a plurality of reinforcing plates connected to said magnet blocks;

two lateral poles connected respectively to said pair of magnet blocks and spaced away from said central iron core;

a sliding cover situated above both of said poles and having a lifter eyelet;

a pair of guide pins on which said sliding cover moves;

a plurality of mechanical force gauges respectively located adjacent to said guide pins;

an overcover surrounding said two lateral poles;

an electronic control circuit situated in a side wall of said overcover;

a sensor located remotely from said electronic control circuit, said sensor functioning to receive information from said plurality of mechanical force gauges and functioning to transmit information to said electronic control circuit; and

at least one compensator coil, one of said at least one compensator coils being situated on top of one of said two lateral poles.

2. The permanent magnet retaining device of claim 1, wherein said device is

a multipolar device, with (N) of said poles, (N-2) of central iron cores enclosed by (N-1) of said magnetic blocks secured by said iron shoes laterally joined to said reinforcing plates and terminated by two of said lateral poles,

upon said (N-1) of said central cores being placed at least one of (N-1) of said compensator coils which are selecting, and (N-1)/2 of reversing compensator cores

and comprising a plurality of sliding covers, with there being at least one of said sliding covers above the (N) poles, moving on said guide pins, surrounded by said mechanical force gauges, said covers being centrally provided with at least one lifter eyelet, and

said electronic control circuit incorporated externally in said side wall of said rectangular enveloping overcover wherein, at the opposite side thereof, a plurality of sensors of said electronic circuit are incorporated.

3. The permanent magnet retaining devices of claim 1, wherein said electronic control circuit comprises

remote control transmission means comprising at least two wireless transmission channels

and provided with an overload warning alarm by means of said force gauges that operated a plurality of sensors which are electric or electronic in the electronic control system.

4. The permanent magnet retaining device of claim 1, wherein

said at least one permanent magnet and compensator coil are arranged such that permanent magnetic flux can be directed from a side of a load, thus releasing the load, or

the permanent magnetic flux can be directed by changing polarity to release the sliding cover and force all flux to the load, thereby ensuring high retaining strength of the load.

5. The permanent magnet retaining device of claim 1, wherein one of said at least compensator coils is situated on top of said central iron core.