Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.3064/MUM/2010 A
(19) INDIA
(22) Date of filing of Application :04/11/2010 (43) Publication Date : 21/06/2013
(54) Title of the invention : AN IMPROVED MECHANICAL INTERLOCK, DUAL TOGGLING AND THREE POSITION
MECHANIS, OF AN ELECTRICAL LOAD BREAK SWITCH
(51) International classification
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No :N/A
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
:H01H31/00;
H01H9/24;
H01H3/30
(71)Name of Applicant :
1)LARSEN & TOUBRO LIMITED
Address of Applicant :L & T HOUSE, BALLARD
ESTATE, MUMBAI 400 001, STATE OF MAHARASHTRA,
INDIA
(72)Name of Inventor :
1)BESS, RUPESHSINGH K.
2)YEO, ZHEN YUAN
3)MALATPURE, ASHOK
4)SHRIVASTAVA, AVANISH
(57) Abstract :
The present invention relates to an improved mechanical interlock, dual toggling and/or three position mechanism of an electrical
load break switch. The mechanism comprises rotating shaft means (5), operating handle means (4), spring arm means (13) having
a mechanism spring means (14); a link arrangement (15), interlock link (09) and plurality of operating shaft means including main
switch operating shaft means (11) and earth switch operating shaft means (12). The spring arm means (13) is operatively
connected to the main switch operating shaft means (11) and earth switch operating shaft means (12). The link arrangement (15)
comprises substantially a triangular shaped link connector and other link connectors. The interlock link (09) comprises at least two
connectors which are connected to other connector forming substantially V shape by means of hinge at one end to facilitate the
movement of the assembly.
No. of Pages : 49 No. of Claims : 11
The Patent Office Journal 21/06/2013 13568