Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
The method of making a permanent magnet which comprises: a. introducing a quantity of hardenable resinous material into a hollow mold, b. spinning said mold about an axis thereof to force said material against an internal surface of said mold, c. introducing premagnetized particles of powdered permanent magnet material into said resinous material while said mold is being spun, the rate of spinning of said mold being sufficient to cause said particles to be uniformly distributed around the circumference of said resinous material and throughout its length and to become densely concentrated in a region of said body of resinous material in the vicinity of its peripheral surface while leaving a lower concentration of said particles in the region of the inner surface of said body, d. exposing said particles to a magnetic field while they are being introduced into and distributed throughout said resinous material to align said particles magnetically, e. and hardening said resinous material while said mold is spun to form a body thereof in which said particles are magnetically aligned to form an effective permanent magnet structure.
Claim 2
Independent Claim
181 words
The method of making a permanent magnet which comprises: a. introducing a quantity of hardenable resinous material into a hollow mold, b. spinning said mold about an axis thereof to force said material against an internal surface of said mold, c. introducing premagnetized particles of powdered permanent magnet material into said resinous material while said mold is being spun, the rate of spinning of said mold being sufficient to cause said particles to be uniformly distributed around the circumference of said resinous material and throughout its length and to become densely concentrated in a region of said body of resinous material in the vicinity of its peripheral surface while leaving a lower concentration of said particles in the region of the inner surface of said body, d. exposing said particles to a magnetic field while they are being introduced into and distributed throughout said resinous material to align said particles magnetically, e. and hardening said resinous material while said mold is spun to form a body thereof in which said particles are magnetically aligned to form an effective permanent magnet structure.
Claim 3
Dependent Claim
52 words
The method of claim 1 in which said particles of permanent magnet material are of sizes in the range from 2 to 10 microns and in which the rate of spinning said mold is such as to produce forces on said particles which are in the range from 375 to 3000 G.
Claim 4
Dependent Claim
58 words
The method of claim 1 in which said particles have been premagnetized by exposing them to a magnetic field of the order of 100,000 Gauss or greater, and in which said particles are subjected to a magnetic field of the order of 1000 Gauss or greater while they are being introduced into and distributed throughout said resinous material.
Claim 5
Dependent Claim
22 words
The method of claim 1 in which said particles of magnetic material comprise an alloy of a rare earth metal with cobalt.
Claim 6
Dependent Claim
15 words
The method of claim 1 in which said particles of magnetic material comprise samarium cobalt.
Claim 7
Dependent Claim
26 words
The method of claim 1 in which said resinous material comprises a thermosetting plastic and in which hardening thereof is effected by the application of heat.
Claim 8
Dependent Claim
20 words
The method of claim 1 in which said resinous material comprises an epoxy resin including a catalyst for hardening it.
Claim 9
Dependent Claim
13 words
The method of claim 1 in which said resinous material comprises a cyanoacrylate.
Claim 10
Dependent Claim
30 words
The method of claim 1 in which said particles of permanent material are introduced into said resinous material by entraining them to a current of air directed into said mold.