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US 5,691,687 AGranted
Contactless magnetic slip ring
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsHiroyuki Kumagai, Joe D. Deardon
Life of this patent
Estimating the term…
Abstract
A contactless magnetic slip ring is disclosed having a primary coil and a secondary coil. The primary and secondary coils are preferably magnetically coupled together, in a highly reliable efficient manner, by a magnetic layered core. One of the secondary and primary coils is rotatable and the contactless magnetic slip ring provides a substantially constant output.
Claims14
A system for coupling electrical signals and power between transmitting and receiving equipment one of which is rotatable and the other of which is stationary, said system comprising:
- (a) a primary coil having a predetermined number of wrapped wires each of a predetermined wire gauge, said wrapped wires having first and second ends that are connected to one of said transmitting and receiving equipment;
- (b) at least one secondary coil spaced apart for said primary coil and having a predetermined number of wrapped wires each of a predetermined wire gauge, said wrapped wires having first and second ends that are connected to the other of said transmitting and receiving equipment, said primary and secondary coils each having an opening which is concentric with each other;
- (c) means for mechanically coupling one of said primary and secondary coils to the rotatable equipment;
- (d) inner and outer cores with the outer core comprising layers of sheets of magnetic metal and the inner core having a diameter which is dimensioned to be and is inserted into each of said opening of said primary and secondary coils and yet to be spaced apart from each of said primary and secondary coils, said outer core being dimensioned to encompass a portion of each of said primary and secondary coils.
1 more element
A magnetic slip ring comprising:
- (a) a primary coil having a predetermined number of wrapped wires each of a predetermined wire gauge, said wrapped wires having first and second ends that are capable of being connected to one stationary and rotatable equipment;
- (b) at least one secondary coil spaced apart for said primary coil and having a predetermined number of wrapped wires each of a predetermined wire gauge, said wrapped wires having first and second ends that are connected to the other of said stationary and rotatable equipment, said primary and secondary coils each having an opening which is concentric with each other;
- (c) means for mechanically coupling one of said primary and secondary coils to the rotatable equipment;
- and
- (d) inner and outer cores with the outer core comprising layers of sheets of magnetic metal and the inner core having a diameter which is dimensioned to be and is inserted into each of said opening of said primary and secondary coils and yet to be spaced apart from each of said primary and secondary coils, said outer core being dimensioned to encompass a portion of each of said primary and secondary coils.
2 more elements
A magnetic slip ring comprising:
- a) a primary coil having a predetermined number of wrapped wires each of a predetermined wire gauge, said wrapped wires having first and second ends that are capable of being connected to one stationary and rotatable equipment;
- (b) at least one secondary coil spaced apart for said primary coil and having a predetermined number of wrapped wires each of a predetermined wire gauge, said wrapped wires having first and second ends that are connected to the other of said stationary and rotatable equipment, said primary and secondary coils being dimensioned to be concentric to each other with one being placed inside the other;
- (c) means for mechanically coupling one of said primary and secondary coils to the rotatable equipment;
- and
- (d) inner and outer cores with the outer core comprising layers of sheets of magnetic metal and the inner core having a diameter which is dimensioned to be and is inserted into each of said opening of said primary and secondary coils, said outer core being dimensioned to encompass a portion of each of said primary and secondary coils.
2 more elements
Dependencies are inferred from the claim text.