I don't know about this particular fraternal organization. But I am familiar with ethnically based fraternals, whose "primary focus" as you call it was to provide burial insurance at a reasonable rate vs the commercial companies.However more importantly that this these ethnic fraternals provided a place where the immigrant would go to find others who spoke his language and enjoy the culture of his homeland.
In the Superior/St Clair area there existed a fair number of Croatians, Slovenes, Slovaks, Serbs and other ethnicities some of whom who had Lodges, which typically had large halls or stages for musical and other cultural events and a meeting place.
Here are some links to "The Protected Home Circle"
1886 Shaton PA On August 6, the Protected home Circle was organized by Rev. H. C. Hall, P. D. Stratton, A. S. Service, Dr. Salem Heilman, J. V. Rose, W. H. Horton, Alexander McDowell, A. W. Williams and M. Zahniser.It was the first fraternal society in the United States to establish a reserve fund provision, to admit women on equality with men and to establish a fixed monthly rate of payment.Sharon circle No. 1 was organized Aug. 17.
And as with many fraternals they had their own march
Composer: Winteringer, J. Marcus H. Title: The protected home circle - march and two-step - written for the PHC, Sharon, PA For: piano Published in: Pittsburgh, PA Publisher: The Winteringer Music Co., Ltd. Date: 1905
Not much else found
Robert Jerin Croatian Heritage Museum Cleveland Ohio And... member of Lodge 995 The Croatian Fraternal Union of America