Magnetically operated switches and methods of making magnetically operated switches

Patent metadata

Field	Value
Publication number	US-10980996-B2
Application number	US-201816139013-A
Country	US
Kind code	B2
Filing date	Sep 22, 2018
Priority date	Apr 19, 2014
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

Magnetic orientation-independent magnetically actuated switches may be made by producing an outer cylinder and an actuator cylinder from ferromagnetic sheets and non-ferromagnetic sheets in alternating order. A first ferromagnetic body is attached to an end of the outer cylinder. The actuator cylinder is positioned within a first bore of the outer cylinder, the actuator pin is positioned within a second bore of the actuator cylinder and a third bore of the first ferromagnetic body with a portion of the actuator pin extending beyond the third bore of the first ferromagnetic body. A second ferromagnetic body is attached to the portion of the actuator pin, thus forming the magnetic orientation-independent magnetically operated switch.

First claim

What is claimed is:

1. A method of making a magnetic orientation-independent magnetically operated switch, comprising:
producing an outer cylinder and an actuator cylinder by stacking ferromagnetic sheets and non-ferromagnetic sheets in alternating order and bonding the ferromagnetic and non-ferromagnetic sheets together;
creating a first bore within the outer cylinder sized to receive the actuator cylinder and producing a second bore within the actuator cylinder sized to receive an actuator pin;
attaching a first ferromagnetic body having a third bore to an end of the outer cylinder so that the third bore of the first ferromagnetic body is aligned with the first bore of the outer cylinder;
positioning the actuator cylinder within the first bore of the outer cylinder;
positioning the actuator pin within the second bore of the actuator cylinder and the third bore of the first ferromagnetic body with a portion of the actuator pin extending beyond the third bore of the first ferromagnetic body; and
attaching a second ferromagnetic body to the portion of the actuator pin, thus forming the magnetic orientation-independent magnetically operated switch.

2. The method of claim 1 ,
wherein producing the outer cylinder and the actuator cylinder comprises cutting the outer cylinder and actuator cylinder from a single stack of alternating ferromagnetic and non-ferromagnetic sheets formed by the stacking of claim 1 .

3. The method of claim 2 , wherein the cutting comprises watercutting.

4. The method of claim 2 , wherein the cutting comprises wire erosion.

5. The method of claim 2 , wherein producing the outer cylinder and actuator cylinder comprises turning down the alternating ferromagnetic and non-ferromagnetic sheets to produce an intended diameter of the outer cylinder and an intended diameter of the actuator pin.

6. The method of claim 2 , wherein creating the first bore within the outer cylinder sized to receive the actuator cylinder and producing the second bore within the actuator cylinder comprises turning the alternating ferromagnetic and non-ferromagnetic sheets.

7. The method of claim 1 , wherein bonding comprises applying a bonding agent.

8. The method of claim 7 , wherein the bonding agent comprises an epoxy.

9. The method of claim 7 , wherein the bonding agent comprises a cyanoacrylate.

10. The method of claim 1 , further comprising providing a spring loaded conductor coupled to the outer cylinder and the actuator cylinder so that movement of the outer cylinder or the actuator cylinder moves the spring loaded conductor.

11. A magnetic orientation-independent magnetically operated switch that is created by acts comprising:
producing an outer cylinder and an actuator cylinder by stacking ferromagnetic sheets and non-ferromagnetic sheets in alternating order and bonding the ferromagnetic and non-ferromagnetic sheets together;
creating a first bore within the outer cylinder sized to receive the actuator cylinder and producing a second bore within the actuator cylinder sized to receive an actuator pin;
attaching a first ferromagnetic body having a third bore to an end of the outer cylinder so that the third bore of the first ferromagnetic body is aligned with the first bore of the outer cylinder;
positioning the actuator cylinder within the first bore of the outer cylinder;
positioning the actuator pin within the second bore of the actuator cylinder and the third bore of the first ferromagnetic body with a portion of the actuator pin extending beyond the third bore of the first ferromagnetic body; and
attaching a second ferromagnetic body to the portion of the actuator pin, thus forming the magnetic orientation-independent magnetically operated switch.

12. The magnetic orientation-independent magnetically operated switch of claim 11 , wherein producing the outer cylinder and the actuator cylinder comprises cutting the outer cylinder and actuator cylinder from a single stack of alternating ferromagnetic and non-ferromagnetic sheets formed by the stacking of claim 11 .

13. The magnetic orientation-independent magnetically operated switch of claim 12 , wherein the cutting comprises watercutting.

14. The magnetic orientation-independent magnetically operated switch of claim 12 , wherein the cutting comprises wire erosion.

15. The magnetic orientation-independent magnetically operated switch of claim 12 , wherein producing the outer cylinder and actuator cylinder comprises turning down the alternating ferromagnetic and non-ferromagnetic sheets to produce an intended diameter of the outer cylinder and an intended diameter of the actuator pin.

16. The magnetic orientation-independent magnetically operated switch of claim 12 , wherein creating the first bore within the outer cylinder sized to receive the actuator cylinder and producing the second bore within the actuator cylinder comprises turning the alternating ferromagnetic and non-ferromagnetic sheets.

17. The magnetic orientation-independent magnetically operated switch of claim 11 , wherein bonding comprises applying a bonding agent.

18. The magnetic orientation-independent magnetically operated switch of claim 17 , wherein the bonding agent comprises an epoxy.

19. The magnetic orientation-independent magnetically operated switch of claim 17 , wherein the bonding agent comprises a cyanoacrylate.

20. A method of making a magnetic orientation-independent magnetically operated switch, comprising:
providing an outer cylinder and an actuator cylinder formed of stacking ferromagnetic sheets and non-ferromagnetic sheets in alternating order that are bonded together, the outer cylinder having a first bore sized to receive the actuator cylinder and the actuator cylinder having a second bore sized to receive an actuator pin;
providing a first ferromagnetic body having a third bore with the first ferromagnetic body being attached to an end of the outer cylinder so that the third bore of the first ferromagnetic body is aligned with the first bore of the outer cylinder;
positioning the actuator cylinder within the first bore of the outer cylinder;
positioning the actuator pin within the second bore of the actuator cylinder and the third bore of the first ferromagnetic body with a portion of the actuator pin extending beyond the third bore of the first ferromagnetic body; and
providing a second ferromagnetic body that is attached to the portion of the actuator pin, thus forming the magnetic orientation-independent magnetically operated switch.

Assignees

• Medtronic Inc

Inventors

• Stone Richard T
• Fodness-Bondhus Spencer
• Doell Walter
• Welter John D
• Schmit Guillaume
• Schneeberger Niklaus

Classifications

• H01F41/0253

  for manufacturing permanent magnets · CPC title

• A61N1/05 Primary

  for implantation or insertion into the body, e.g. heart electrode (A61N1/06 takes precedence) · CPC title

• H01H2229/00

  Manufacturing · CPC title

• H01F41/0286

  Trimming · CPC title

• A61N1/0551

  Spinal or peripheral nerve electrodes · CPC title