Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
An implantable heart pacer for stimulating the heart of a patient, said pacer comprising a pacer circuit including a multiturn potentiometer, said potentiometer including a shaft which when turned controls a continuous change in the rate at which stimulating pulses are generated by the pacer circuit, magnet means fixed to the potentiometer shaft for controlling the turning thereof as the magnet is rotated, said magnet means being rotated by rotating magnetic flux lines emanating external of said patient, a magnetically permeable, hermetically sealed, package encapsulating said pacer circuit for allowing rotating magnetic flux lines which flow through said package to said magnet means to cause said magnet means to rotate, a magnetically permeable can for housing said magnet means, and bar means electrically disconnected from said circuit and made of soft magnetic material disposed on said can for braking said magnet means from rotating more than one half-turn in the absence of externally emanating rotating flux lines.
Claim 2
Dependent Claim
157 words
An implantable heart pacer for stimulating the heart of a patient, said pacer comprising a pacer circuit including a multiturn potentiometer, said potentiometer including a shaft which when turned controls a continuous change in the rate at which stimulating pulses are generated by the pacer circuit, magnet means fixed to the potentiometer shaft for controlling the turning thereof as the magnet is rotated, said magnet means being rotated by rotating magnetic flux lines emanating external of said patient, a magnetically permeable, hermetically sealed, package encapsulating said pacer circuit for allowing rotating magnetic flux lines which flow through said package to said magnet means to cause said magnet means to rotate, a magnetically permeable can for housing said magnet means, and bar means electrically disconnected from said circuit and made of soft magnetic material disposed on said can for braking said magnet means from rotating more than one half-turn in the absence of externally emanating rotating flux lines.
Claim 3
Dependent Claim
20 words
A heart pacer in accordance with claim 1 wherein said can includes bearing means for mounting said magnet means therein.
Claim 4
Dependent Claim
30 words
A heart pacer in accordance with claim 2 wherein said magnet means is a diametrically magnetized disc magnet whose axis is in line with the axis of said potentiometer shaft.
Claim 5
Dependent Claim
39 words
A heart pacer in accordance with claim 1 wherein said magnet means is rotated by rotating magnetic flux lines emanating external of a patient and said pacer circuit further includes a magnetically permeable can for housing said magnet means.
Claim 6
Dependent Claim
20 words
A heart pacer in accordance with claim 4 wherein said can includes bearing means for mounting said magnet means therein.
Claim 7
Dependent Claim
30 words
A heart pacer in accordance with claim 1 wherein said magnet means is a diametrically magnetized disc magnet whose axis is in line with the axis of said potentiometer shaft.
Claim 8
Dependent Claim
55 words
A heart pacer in accordance with claim 6 further including magnet means mounted for rotation external of said magnetically permeable package, said potentiometer shaft magnet means and said external magnet means being fluxlinked to each other, and means responsive to the insertion and rotation therein of a needle tool for rotating said external magnet means.
Claim 9
Dependent Claim
31 words
A heart pacer in accordance with claim 7 wherein said external magnet means is a diametrically magnetized disc magnet whose axis is in line with the axis of said potentiometer shaft.
Claim 10
Dependent Claim
28 words
A heart pacer in accordance with claim 8 furtheR including a can for housing said external magnet means in a plane parallel with said potentiometer shaft magnet means.
Claim 11
Dependent Claim
55 words
A heart pacer in accordance with claim 1 further including magnet means mounted for rotation external of said magnetically permeable package, said potentiometer shaft magnet means and said external magnet means being fluxlinked to each other, and means responsive to the insertion and rotation therein of a needle tool for roating said external magnet means.
Claim 12
Dependent Claim
28 words
A heart pacer in accordance with claim 10 further including a can for housing said external magnet means in a plane parallel with said potentiometer shaft magnet means.