Knock-detecting locks

[Doug MacQueen]

More secure? I thought the older English keylocks were secure. Anyway, I didn't pick up a "Knock" lock when they came out but I do have a brand new "Scrambler". Interested? And I know I have that S&G ad somewhere. The problem is where. Doug

[wylk]

Here is an inside look at a Pulsetronic keypad. Unfortunately, S&G's official position was that when the battery runs down, the customer needs to buy a new keypad. The battery is not field-serviceable. It's made from two CR123A batteries in series, encased in heat-shrink plastic (twice), possibly spot-welded together, with solder tabs (also likely spot-welded) and wires that solder to the printed circuit board. No wonder they didn't want anybody attempting a repair but it seems a poor design to have disallowed battery replacement (unlike the lock itself, which does seem to allow it).

Does anybody have any idea where else to get such a battery assembly?



This one has in fact been opened and repaired in the past.

[chubbbramah]

There are some key locks from the 13C still in service and functioning, though few modern buildings will last that many centuries, so perhaps their locks do not need to either.
Some folk take a jaundiced view of locks which need a new battery every few months though.