Tyne & Wear Archives have film of St Michael's RC church records as follows......
Baptisms 1873-1968. (Indexed)
Marriages 13 Oct 1874-15 Sep 1973 ( Not Indexed)
Deaths 15 Oct 1873- 30 Nov 1983 ( Not Indexed)
The indexes of the baptisms were very helpful as they included child's surname and child's mother's maiden name.
There were plenty Kelly baptisms but none with an Armstrong maiden name.
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I could not see a Convery baptism onwards from 24th Aug 1912 up to end of October. (I looked in both Baptisms and Baptism Index)
( There was a Convery baptism 14 Sep 1913- born 19 Aug 1913, of Sarah Ann Cupit Convery, dtr of James and Ann nee Cupit. Godmother Mary Turbitt- annotated that Sarah married William Fullen 1st Aug 1936 in this church )
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Archives have this church as Elswick, rather than Newcastle.
Michael