H - Electricity – 01 – F
Patent
H - Electricity
01
F
310/60
H01F 7/08 (2006.01) H01F 7/16 (2006.01)
Patent
CA 1123036
Electric Spool for Dry Axial Solenoid Abstract of the Disclosure An electric spool assembly for a dry axial solenoid includes a magnetic pole and a sleeve formed of non-magnetic tube material and a magnetic base. The pole has a portion which is received in axial interfitting relation with one end of the sleeve. The base has a portion received in interfitting relation with the opposite end of the sleeve thus forming a first telescopic joint between the sleeve and the pole at one end of the sleeve and a second telescopic joint between the sleeve and the base at the other end of the sleeve. The sleeve defines an axial air gap between the pole and the base forming an opening. Means are provided on the outer surface of the assembly forming an annular coil-receiving space defined at least in part by the outer surface of the sleeve. An electric coil having turns of wire wound in tension around the sleeve outer surface causes the sleeve to be physically compressed in the regions where the sleeve is telescopically interfitted with the base and the pole thereby thermally and mechanically connecting the sleeve with the hub and the base. A highly efficient thermal and magnetic connection is thus formed between the base, the pole and the sleeve and the close proximity of the turns of the electric coil to these parts not only enhances the magnetic efficiency but also enhances the thermal efficiency of the unit.
309248
Gowling Lafleur Henderson Llp
Ledex Inc.
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