# US 8,541,708 B2 · Button switch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,708 B2 - Document ID: US8541708B2 - Status: Granted - Kind: B2 - Application number: 13/039,439 - Filed: 2011-03-03 - Published: 2012-09-06 - Granted: 2013-09-24 - Earliest claimed: 2011-03-03 - Assignees: General International Mfg (Co) Ltd. - Applicants: Christian Chenier - Inventors: Christian Chenier - Web page: https://patentgrep.com/patent/US8541708B2 ## CPC - H01H 13/56: the contact returning to its original state upon the next application of operating force - 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 A button switch includes a main body. The main body includes a switch member therein. The switch member has a start portion and a stop portion to connect with a start button and a stop button, respectively. The stop button has a first position and a second position. In a normal state, the stop button is located at the first position and doesn't drive the stop portion. When the stop button is at the second position, the stop button will drive the stop portion. Thus, the operator is enforced to press the stop button again and the stop button is returned to the first position to start the switch member, preventing the operator to press the start button unexpectedly to start the switch member. ## Claims ### Claim 1 A button switch, comprising: a main body comprising a switch member, the switch member having a start portion and a stop portion; a start button disposed on the main body to drive the start portion; a stop button disposed on the main body to drive the stop portion, wherein the stop button has a first position and a second position, in a normal state, the stop button is located at the first position and doesn't drive the stop portion, when the stop button is pressed the first time, the stop button is moved from the first position to the second position to drive the stop portion, when the stop button is pressed the second time, the stop button is returned to the first position; the main body further comprises an outer casing on top of the stop button, the outer casing has a bottom provided with a plurality of circular poles, and each of the circular poles is fitted with a spring and elastically against the stop button; and the bottom of the outer casing is provided with a protrusion which is disposed close to the stop button, a top end of the guide rod is formed with a press plate, and the press plate has a concave top surface corresponding to the protrusion. ### Claim 2 (depends on 1) The button switch as claimed in claim 1, wherein the main body further has an accommodation trough at a central portion thereof and a through hole in a bottom of the accommodation trough, the stop button being accommodated in the accommodation through, the stop button comprising a guide rod which is axially disposed relative to the through hole and received in the accommodation trough, one end of the guide rod being defined as a positioning end, the positioning end being located in the through hole, the guide rod comprising a fixed toothed portion on a side wall thereof, a block portion below the fixed toothed portion and a rotatable ring between the fixed toothed portion and the block portion, the rotatable ring having a movable toothed portion to engage with the fixed toothed portion, a spring provided between the block portion and the accommodation trough of the main body, an inner wall of the accommodation trough of the main body having a plurality of guide grooves corresponding to the fixed toothed portion and the movable toothed portion and a positioning toothed portion between every two of the guide grooves, the positioning toothed portion being disposed close to an open end of the relative guide groove, thereby, when the stop button is located at the first position, the fixed toothed portion being located in the guide grooves and the positioning end of the guide rod being received in the through hole, when the stop button is pressed the first time, the guide rod being moved outward toward the through hole, the positioning end being moved out of the through hole, the rotatable ring being turned an angle for the movable toothed portion to engage with the fixed toothed portion, such that the guide rod won't be returned to its original position by the spring and the stop button has the second position. ### Claim 3 (depends on 1) The button switch as claimed in claim 1, wherein the main body comprises an upper part, a lower part and a chamber between the upper part and the lower part to accommodate the switch member. ### Claim 4 (depends on 3) The button switch as claimed in claim 3, wherein the main body further comprises a seal ring at the junction of the upper part and the lower part. ### Claim 5 (depends on 1) The button switch as claimed in claim 1, wherein the start button is disposed on top of the main body, the start button has a bottom connected with a start member, and the start member has one end which is located opposite to start button and against the start portion. ### Claim 6 (depends on 1) The button switch as claimed in claim 1, wherein the stop button is disposed on the top of the main body, the stop button has a bottom connected with a stop member, and the stop member has one end which is located opposite to the stop button and selectively against the stop portion. ### Claim 7 (depends on 1) The button switch as claimed in claim 1, wherein the main body further comprises a limit unit, the limit unit comprises a limit member which is rotatable, the limit member is turned an angle to be located between the start button and the start portion of the switch member, such that the start button is unable to start the start portion. ### Claim 8 (depends on 7) The button switch as claimed in claim 7, wherein the limit unit comprises a lock set, the lock set is connected with the limit member, and a key is used to unlock the lock set for driving the limit member.