the blade can be turned in either direction for feathering , or for adjusting the pitch ; and when the pitch is once fairly adjusted , Fig . 369 . — Bolt Fastenings . Fig . 370 . — Bolt Fastenings . a , Boss , b , Blade , c , Bolt . d , Plate . A , Boss , b , Blade , c , Plate . d d , Bolts . e ,… … round : by notching the head for a Fig . 37t . — Bolt Fastenings . , Boss . B , Blade . c , Bolt . d , Washer . split pin , or by notched washer E , Split pin . plates fitting to the heads and se - cured with set screws , or with stud and split pin tapped into the bottom plate , or by small square…
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