Bob: The large engine beam used to transmit power from the cylinder to the pump rods or sweep rods.The bob pivots on a a trunnion mounted on the bob wall.
Bob Wall: The strongest wall of an engine house which supported the bob (beam). It formed part of the engines framing and sometimes is the only wall standing of a
collapsed engine house. In a pump Engine it will be the wall next to the shaft and in a winding engine the wall next to the loadings.
Bob Plat: The wooden balcony projecting from the top of the bob wall of an engine house alongside the beam. It was used to give maintenance access to the
bearings at the beams nose.
Nick
________________________________________
From: mining-history <[log in to unmask]> on behalf of Andy Cuckson <[log in to unmask]>
Sent: 02 July 2017 07:00
To: [log in to unmask]
Subject: Bob-plat definition
Dear fellow Listees,
Can anyone give me a comprehensive definition of a bob-plat please?
Best regards,
Andy Cuckson
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