# US 10,483,051 B2 · Contact slide unit for a switching unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,051 B2 - Document ID: US10483051B2 - Status: Granted - Kind: B2 - Application number: 15/556,550 - Filed: 2015-11-02 - Published: 2018-02-22 - Granted: 2019-11-19 - Earliest claimed: 2015-03-11 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: Martin Steinbauer - Web page: https://patentgrep.com/patent/US10483051B2 ## CPC - H01H 1/20: Bridging contacts {(for circuit breakers H01H73/045)} - H01H 1/32: Self-aligning contacts - H01H 1/50: Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position - H01H 1/2008: {Facilitate mounting or replacing contact bridge and pressure spring on carrier (H01H11/0012 takes precedence)} - H01H 73/045: {Bridging contacts} - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract The disclosure relates to a contact slide unit for a switching unit, including a contact slide inside which a movable contact piece is guided, wherein the contact piece is biased from one side by a contact load spring. The disclosure also relates to a method for assembling the contact slide unit. The disclosure is characterized in that the movable contact piece is mounted in a winding interstice between two windings of the contact load spring. ## Claims ### Claim 1 A contact slide unit for a switching unit, the contact slide unit comprising: a contact slide; a moving contact piece guided within the contact slide, wherein the moving contact piece has a top side and a bottom side, and wherein the contact slide is positioned on the top side of the moving contact piece; and a contact load spring, wherein one side of the moving contact piece is acted on by the contact load spring, and wherein the moving contact piece is mounted in a turn gap between two turns of the contact load spring such that a first part of the contact load spring is positioned above the top side of the moving contact piece, a second part of the contact load spring is positioned below the bottom side of the moving contact piece, and the turn gap is positioned between the first part and the second part of the contact load spring. ### Claim 2 (depends on 1) The contact slide unit of claim 1, wherein turns of the contact load spring positioned above the top side of the moving contact piece are guided by a contour in the contact slide. ### Claim 3 (depends on 2) The contact slide unit of claim 2, wherein turns of the first part of the contact load spring positioned above the top side of the moving contact piece have a narrowing diameter extending in a direction away from the top side of the moving contact piece. ### Claim 4 (depends on 2) The contact slide unit of claim 2, further comprising: a spacer positioned in the contact load spring between a last turn on the bottom side of the moving contact piece and a first turn on the top side of the moving contact piece. ### Claim 5 (depends on 4) The contact slide unit of claim 4, wherein the spacer is level with a longitudinal edge of the moving contact piece. ### Claim 6 (depends on 2) The contact slide unit of claim 2, wherein the contour in the contact slide is conically tapered. ### Claim 7 (depends on 6) The contact slide unit of claim 6, wherein turns of first part of the contact load spring positioned above the top side of the moving contact piece have a narrowing diameter extending in a direction away from the top side of the moving contact piece. ### Claim 8 (depends on 7) The contact slide unit of claim 7, further comprising: a spacer positioned in the contact load spring between a last turn on the bottom side of the moving contact piece and a first turn on the top side of the moving contact piece. ### Claim 9 (depends on 8) The contact slide unit of claim 8, wherein the spacer is level with a longitudinal edge of the moving contact piece. ### Claim 10 (depends on 9) The contact slide unit of claim 9, wherein the moving contact piece has opposing projections. ### Claim 11 (depends on 6) The contact slide unit of claim 6, further comprising: a spacer positioned in the contact load spring between a last turn on the bottom side of the moving contact piece and a first turn on the top side of the moving contact piece. ### Claim 12 (depends on 11) The contact slide unit of claim 11, wherein the spacer is level with a longitudinal edge of the moving contact piece. ### Claim 13 (depends on 1) The contact slide unit of claim 1, wherein turns of the first part of the contact load spring positioned above the top side of the moving contact piece have a narrowing diameter extending in a direction away from the top side of the moving contact piece. ### Claim 14 (depends on 1) The contact slide unit of claim 1, further comprising: a spacer positioned in the contact load spring between a last turn on the bottom side of the moving contact piece and a first turn on the top side of the moving contact piece. ### Claim 15 (depends on 14) The contact slide unit of claim 14, wherein the spacer is level with a longitudinal edge of the moving contact piece. ### Claim 16 (depends on 1) The contact slide unit of claim 1, wherein the moving contact piece has opposing projections. ### Claim 17 A circuit breaker comprising: a contact slide unit, the contact slide unit having: a contact slide; a moving contact piece guided within the contact slide, wherein the moving contact piece has a top side and a bottom side, and wherein the contact slide is positioned on the top side of the moving contact piece, and a contact load spring, wherein one side of the moving contact piece is acted on by the contact load spring, and wherein the moving contact piece is mounted in a turn gap between two turns of the contact load spring such that a first part of the contact load spring is positioned above the top side of the moving contact piece, a second part of the contact load spring is positioned below the bottom side of the moving contact piece, and the turn gap is positioned between the first part and the second part of the contact load spring. ### Claim 18 A method for assembling a contact slide unit for a switching unit, the method comprising: providing a moving contact piece having a top side and a bottom side, inserting the moving contact piece into a turn gap in a contact load spring to provide a structural unit, wherein: a first part of the contact load spring is positioned above the top side of the moving contact piece, a second part of the contact load spring is positioned below the bottom side of the moving contact piece, the turn gap is positioned between the first part and the second part of the contact load spring, and one side of the moving contact piece is acted on by the contact load spring; and fitting the structural unit in a contact slide, wherein the contact slide is positioned on the top side of the moving contact piece.