It may be therefore appreciated that the pivot element 31 now acts as a fulcrum for the movement of the T-lever 27.Īn example of the operating conditions in the series circuit wherein the phase angle is greater than zero is illustrated in Fig. Upon completion of movement of the strap arm 23 in a leftwardly direction, the eccentric reverses the movement of the strap arm 23 to impart a counterclockwise movement to the rock arm 27 consequently the cross arm 28 now pivots in a counterclockwise direction about the stationary contact 32 until the right-hand contact 29 engages the pivot element 31 whereupon continued movement of the rock arm 26 causes the cross arm 28 to pivot and break the engagement of the right-hand contact element 29 with the stationary contact 32. This movement breaks the engagement of the left-hand contact element 29 with the pivot element 31 at a time when the T-lever is pivoting with maximum velocity. Considering now the movement of the T-lever 27 the movement of the rock arm 26 causes the cross arm 28 to pivot in a clockwise direction about the contact or pivot element 31 until the right-hand contact element 29 engages the stationary contact 32, whereupon continued movement of the rock arm 26 causes the cross arm 28 to pivot in a clockwise direction about the stationary contact 32 which now operates as a fulcrum. When the shaft 14 is rotated, the eccentrics 16 and 1.7 reciprocate their respective straps 23 and 42 to rock the T-levers 27 and 49. H01H3/26- Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor.H01H3/22- Power arrangements internal to the switch for operating the driving mechanism.H01H3/00- Mechanisms for operating contacts.H01H- ELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES.238000006011 modification reaction Methods 0.000 description 1.238000003379 elimination reaction Methods 0.000 description 1.238000006073 displacement reaction Methods 0.000 description 2.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Teletype Corp filed Critical Teletype Corp Priority to US32094052 priority Critical patent/US2766389A/en Application granted granted Critical Publication of US2766389A publication Critical patent/US2766389A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Teletype Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Robert E Arko Current Assignee (The listed assignees may be inaccurate.
Google Patents Circuit maker and breakerĭownload PDF Info Publication number US2766389A US2766389A US32094052A US2766389A US 2766389 A US2766389 A US 2766389A US 32094052 A US32094052 A US 32094052A US 2766389 A US2766389 A US 2766389A Authority US United States Prior art keywords contact circuit pair eccentrics lever Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2766389A - Circuit maker and breaker