Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
156 words
A permanent magnet solenoid device comprising, in combination, a pair of substantially identical permanent magnet means arranged in axially aligned and axially spaced opposing relation, each permanent magnet means including a central cylindrical pole of one polarity and an annular pole of the opposite polarity forming, with the central pole, an open annular groove separating the two poles; an inner substantially circular pole piece interposed between the facing ends of said cylindrical poles; an outer annular pole piece interposed between the facing ends of said annular poles; said inner and outer pole pieces defining therebetween an annular air gap having a very small radial dimension; a substantially cylindrical moving coil winding means positioned in said air gap; a mechanical operator connected to said winding means for axial movement with the latter; and circuit means connected to said winding means to apply an electric potential thereacross to effect axial movement of said winding means and said operator.
Claim 2
Dependent Claim
156 words
A permanent magnet solenoid device comprising, in combination, a pair of substantially identical permanent magnet means arranged in axially aligned and axially spaced opposing relation, each permanent magnet means including a central cylindrical pole of one polarity and an annular pole of the opposite polarity forming, with the central pole, an open annular groove separating the two poles; an inner substantially circular pole piece interposed between the facing ends of said cylindrical poles; an outer annular pole piece interposed between the facing ends of said annular poles; said inner and outer pole pieces defining therebetween an annular air gap having a very small radial dimension; a substantially cylindrical moving coil winding means positioned in said air gap; a mechanical operator connected to said winding means for axial movement with the latter; and circuit means connected to said winding means to apply an electric potential thereacross to effect axial movement of said winding means and said operator.
Claim 3
Dependent Claim
104 words
A permanent magnet solenoid device, as claimed in claim 1, in which said pair of substantially identical permanent magnet means comprises a pair of substantially identical cylindrical permanent magnets each having a base interconnecting its central and annular poles at the ends of the permanent magnet remote from the other permanent magnet, and forming the base of an open annular groove separating its two poles; and connecting means interconnecting said winding means and said operator and extending through the annular groove and through apertures in the base of one of said permanent magnets; said operator being located axially outwardly of said one permanent magnet.
Claim 4
Dependent Claim
72 words
A permanent magnet solenoid device, as claimed in claim 2, in which said winding means comprises a winding form of non-magnetic material and a moving coil winding wound on said form; said connecting means including pins of non-magnetic material connected to said winding form and extending outwardly through apertures in the base of said one permanent magnet, and including means interconnecting the outer ends of said pins and connected to said operator.
Claim 5
Dependent Claim
95 words
A permanent magnet solenoid device, as claimed in claim 3, in which said winding form and said pins are formed of electrically conductive, non-magnetic metal; a ring of dielectric material positioned axially adjacent said winding form and having apertures closely embracing said pins; a further pin secured to said ring and terminating thereat, said further pin extending outwardly through an aperture in the base of said one permanent magnet; one terminal of said winding being electrically connected to said winding form and the other terminal of said winding being electrically connected to said further pin.
Claim 6
Dependent Claim
80 words
A permanent magnet solenoid device, as claimed in claim 4, including a cylindrical casing closely enbracing said permanent magnets and said outer annular pole piece, and having a closed bottom wall seating the base of the other of said permanent magnets, said casing having an open outer end; and a cover enclosing said open outer end of said casing and sealed to said casing; said cover being formed with an aperture and said operator extending outwardly through said cover aperture.
Claim 7
Dependent Claim
30 words
A permanent magnet solenoid device, as claimed in claim 5, in which said pins extend through dielectric bushings seated in the apertures of the base of said one permanent magnet.
Claim 8
Dependent Claim
36 words
A permanent magnet solenoid device, as claimed in claim 6, including a dielectric guide ring adjacent the outer surface of the base of said one permanent magnet and formed with apertures through which said pins extend.
Claim 9
Dependent Claim
108 words
A permanent magnet solenoid device, as claimed in claim 5, in which said means interconnecting the outer ends of said pins comprises a plate of electrically conductive material; the open outer end of said casing being forMed with an annular shoulder on its inner surface; and a sealing washer seated in said annular shoulder and including a sealing diaphragm having a central aperture therethrough; said operator comprising a substantially cylindrical metal member having its inner end secured to said electrically conductive plate and extending through the aperture in said diaphragm and the aperture in said cover; said operator being sealed to said flexible diaphragm at said aperture therein.
Claim 10
Dependent Claim
63 words
A permanent magnet solenoid device, as claimed in claim 8, in which said sealing washer comprises a relatively rigid ring of dielectric material seated in said annular shoulder; said diaphragm comprising a thin sheet of elastomeric material stretched across and sealed to said last-named dielectric ring; and an O-ring sealed to said diaphragm concentrically with the opening therein and sealed to said operator.
Claim 11
Dependent Claim
29 words
A permanent magnet solenoid device, as claimed in claim 9, in which the outer end of said operator is formed for mechanical connection to means operated by said device.