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PH Designs BK system tension lock couplings


Pete Harvey

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This post was originally posted by MR Andy York on Sun Jul 26, 2009

 

At the Members' Day Pete Harvey showed me his etch of tension lock hooks to use as a straight replacement for Bachmann hooks based upon Brian Kirby's clever idea

 

BK1.jpg

 

The etch has 20 replacement hooks and are a straight replacement, the following images show one way a staple may be used to enable the uncoupling action to perform.

 

BKPHD.jpg

 

http://www.youtube.com/watch?v=gB24cqv-v-s&feature=player_embedded

This short video shows the uncoupling action over a fixed magnet.

 

Bachmann Coupling

assy.jpg

This is the designed method for fitting the staple

 

Hornby.jpg

Hornby Type Coupling

 

Lima.jpg

Lima Type

 

I'm pleased to say I can now offer couplings for the current Hornby type couplings and for the old type Lima couplings.

 

Price: ??4.99 +??1.00 P+P

 

The hooks work well over conventional track although the length of the vertical shank can foul the operation of the hook over infilled track. The hook is robust and is slightly bulkier in appearance than the Bachmann hook although the visual impact would be reduced after painting in dark tones. I'd be interested in the practicalities of a slightly thinner hook with a shank that was 2-3mm shorter.

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