Method of forming a contact involving the removal of flash

Patent metadata

Field	Value
Publication number	US-10283285-B2
Application number	US-201715436279-A
Country	US
Kind code	B2
Filing date	Feb 17, 2017
Priority date	Feb 17, 2017
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

Embodiments relate generally to systems and methods for preventing arcing within a snap action switch, particularly by removing a portion of a contact carrier attached to a stationary contact. A method of forming a contact for use in a snap action switch may comprise welding a contact onto a contact carrier; trimming at least one edge of the contact carrier proximate to the contact; and installing the contact carrier into a snap action switch housing. Trimming the at least one edge of the contact carrier may also comprise removing flash formed during the welding of the contact to the contact carrier.

First claim

What is claimed is:

1. A method of forming a contact for use in a snap action switch, the method comprising:
forming a contact onto a contact carrier;
forming flash on the contact carrier, wherein the flash is positioned to extend from the contact along the contact carrier;
trimming at least one edge of the contact carrier proximate to the contact, wherein the trimming comprises removing the flash and a portion of the contact carrier proximate to the contact; and
installing the contact carrier into a snap action switch housing.

2. The method of claim 1 , wherein the contact comprises a material different from that of the contact carrier.

3. The method of claim 1 , wherein forming the contact onto the contact carrier comprises welding.

4. The method of claim 1 , wherein forming the contact onto the contact carrier comprises welding a silver contact to a brass contact carrier.

5. The method of claim 1 , wherein the trimming further comprises forming an edge of the contact carrier that is flush with at least a portion of the contact.

6. The method of claim 1 , wherein the trimming further comprises forming an edge of the contact carrier that is within 0.01 inches of at least a portion of the contact.

7. The method of claim 1 , wherein installing the contact carrier into a snap action switch comprises installing the stationary contact proximate to a C-spring within the snap action switch.

8. The method of claim 1 , wherein forming the contact onto the contact carrier comprises extruding material out from the interface between the contact and the contact carrier, and wherein trimming comprises removing the extruded material.

9. A method of forming a contact for use in a snap action switch, the method comprising:
attaching a contact to a contact carrier, wherein the contact comprises a material different from that of the contact carrier;
forming flash on the contact carrier, wherein the flash is positioned to extend from the contact along the contact carrier;
removing the flash and material of the contact carrier from at least one edge of the contact carrier proximate to the contact; and
shaping the edge of the contact carrier proximate to the contact.

10. The method of claim 9 , further comprising extruding the flash from the interface between the contact and the contact carrier.

11. The method of claim 10 , wherein the forming the flash on the contact carrier comprises forming the flash adjacent to an edge of the contact carrier.

12. The method of claim 9 , wherein attaching the contact to the contact carrier comprises welding a silver contact to a brass contact carrier.

13. The method of claim 9 , wherein removing material comprises forming an edge of the contact carrier that is within 0.01 inches of at least a portion of the contact.

Assignees

• Honeywell Int Inc

Inventors

• Tillotson John Kenneth
• Brose Matthew
• Bradley Ian
• Ballard Darryl

Classifications

• H01H5/04

  Energy stored by deformation of elastic members (by deformation of bimetallic element in thermally-actuated switches H01H37/54) · CPC title

• B23K2101/36

  Electric or electronic devices · CPC title

• B23K2101/00

  Articles made by soldering, welding or cutting · CPC title

• H01H11/06

  Fixing of contacts to carrier {; Fixing of contacts to insulating carrier} · CPC title

• B23K2101/38

  Conductors · CPC title