Patent EA-000359-B1 (EA)
Title: A multipole electrical switch having one elementary switching bar per pole
Inventor: MOREL ROBERT
IPC: H01H21/18
Filed: 1997-09-15
Abstract: 1. A multipole electrical switch in a parallelepiped housing, made of insulating material, comprising: - a control mechanism (62), general for a group of poles, enable to operate the switch (10) - a plurality of one-pole modules of a switch (30), disposed on one line in adjacent compartments (22, 24, 26, 28), isolated from each other by separating partitions (20), where each module is provided with a mobile contact (36) in the form of a bridge, interacting with a pair of contacts (38, 40)opposite the bridge, said bridge enables to provide a double interruption of current per pole and - a transmission means enable to simultaneous displacement of said mobile contacts (36) of all modules (30) of the switch through the action of the control mechanism (62) characterized in that each module (30) of the switch comprises an elementary switching bar (34), supporting a mobile contact (36) where said bar is formed by a rotatable towards the vertical axis insulating pin (42) having an end portion to guide the rotation at one of its ends, and a driving means (46, 52) at the other end; and a pair of driving rods (58, 60) mechanically connected to the driving means (46, 52) of all switching bars (34) and enable to interact with coupling rods (80, 82) of the control mechanism (62), providing the displacement of the driving rods (58, 60) when moving in opposite directions during the displacement from the open position to the closed position and vice-versa, where the elongated driving rods are parallel to each other in horizontal plane, perpendicular to other rotating pins (42). 2. A switch according to Claim 1, wherein the driving means of each, elementary switching bar (34) comprises a driving lug (46), arranged on the upper end of the pin (42) and a ring of transmission (52) encircling said lug (46) and additionally provided with two small pins, inserted in the holes (64) made in the driving rods (58, 60). 3. A switch according to Claim 1 or 2, wherein said driving rods are made enabling respectfully traction action or compression, following the action of the coupling rods (80, 82) on one of the rings of the intermediate pole. 4. A switch according to Claim 3, wherein the control mechanism (62) comprises a device (66) of double crank, associated with two coupling rods (80, 82) and a toothed gear arrangement (68) for the frontal or lateral action. 5. A switch according to Claim 4, wherein the device (66) of double crank comprises two levers (74, 76) jointly connected to each other on the level of the coupling rods (80, 82) via an intermediate lever (78), a pair of fixed flanges (70, 72), having a circular portion (83) along which two rods (80, 82) travel, and springs, put on each lever (74, 76), and a support bearing on the corresponding coupling rod (80, 82). 6. A switch according to Claim 5, wherein the upper ends of the coupling rods (80, 82) are positioned in the recess of the teeth crowns of the main gear (84) of the toothed gear arrangement (68) 7. A switch according to Claim 6 wherein the main gear (84) is mechanically coupled with a tapered gear (98) via a gear of counter rotation (100), and that a removable control handle (86) is adaptable to be connected either to main gear (84), or to tapered gear (98) to control operation frontally or laterally. 8. A switch according to one of the preceding Claims, wherein the housing is formed by superposition of the base (14), comprising compartments (22, 24, 26, 28), one-pole modules, intermediate casing (16), comprising the driving means (46, 52), pins (42) and the driving rods (58, 60), and covers (18) for positioning the control mechanism (62). 9. A switch according to one of the preceding Claims, wherein each switching bar (34) carries a double mobile contact (36) arranged as a bridge, formed by two parallel connecting bars (36A, 36B), passing through the holes (102), insulating pin (42) and separated from each other by a predetermined clearance (d) and interacting on one side with the first fixed contact (38) when connected to one of the clamps (112), and on the opposite side with the second fixed contact (40) when connected to another clamp (114) of each pole. 10. A switch according to Claim 7, wherein the housing comprises an additional compartment (32) for possible location of at least one auxiliary device (33) for electrical indication to indicate the open or closed position of the switch (10) contacts, and the auxiliary device (33) operates at the end of rotation of the lateral tapered gear (98) by means of a sliding contact (88).