The Collaborative International Dictionary of English v.0.48:

Algate \Al"gate\, Algates \Al"gates\, adv. [All + gate way. The
   s is an adverbial ending. See Gate.]
   1. Always; wholly; everywhere. [Obs.]
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            Ulna now he algates must forego.      --Spenser.
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   Note: Still used in the north of England in the sense of
         "everywhere."
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   2. By any or means; at all events. [Obs.] --Fairfax.
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   3. Notwithstanding; yet. [Obs.] --Chaucer.
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