Sir Ishwar Singh Chawla case is regarding Section 54 and not 54G. This is not related to your query.
In case following conditions are fulfilled, the capital gain U/s. 54G shall be exempted as per rates given below :
(i) Capital asset (P & M, Land, buildings or any right therein) is transferred due to shifting of industrial undertaking from urban areas to rural areas; and
(ii) Capital Gain is reinvested within a period of 1 year before or 3 years after the date in
(a) purchase of new machinery or plant for the purposes of business of the industrial undertaking in the area to which the said undertaking is shifted;
(b) acquiring building or land or construction of building for the purpose of his business in the said area;
(c) shifting the original asset and transferring the establishment of such undertaking to such area; and
(d) incurred expenses on such other purposes as may be specified in a scheme framed by the Central Government for the purposes of this section.
In your case you are not purchasing on the firm name and investing the same after distribution among yourself. If you read Section 54G as explained above you will get your answer, we believe.