Gents Gents leicester Hipp toggle master help required

Ryansclocks

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Jan 3, 2022
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Hi after some help and advice on power supply for my 1930s gents clock. It looks very similar to the PO 36 clock but as can be seen has a dial and different wiring connections at top etc. I read on here that the po 36 should run of 4.5volt but I guess that mine must have different coils than this. I have 1.2kohm on my clocks magnet and 3.5k on dial. I even split the magnet just incase was faulty but both sides measure 600ohm. I have tried running on 12volt 2a supply to no avail. It will just about run but pulses every swing. So yes wiring diagram & advice on power supply would be great. Also how to set up hipp toggle mechanism iv tried moving it accross to see if is any difference but just don't think is enough power from the magnet. Dial doesn't move either?
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As you can see a little different to the 36 terminals and even have 4 wires to the dial for some reason?

Eventual plan is to run this with my slave and c7 (acting as a slave (to noisy for home)) pics below 20220103_194411.jpg
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Thanks in advance Ryan 20220103_191256.jpg
 

John UK

Registered User
Mar 25, 2006
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I can't give you a definitive answer and what follows is 'educated guesswork', but Gents C7 were designed for 220 mA series operation, but did come in different versions. I have one that was designed for use on 48V. Could it be a clue that your terminal board has a "50 Volt battery" set of terminals?

For the Hipp toggle drive 1200 Ohms with 50 Volts gives 40 mA, which would not seem at all unreasonable. Typically, the toggle should energise every few swings - maybe 6 to 12.

You are right in that it bears a resemblance to a PO36 with a Gents dial. Gents made some PO36 clocks under contract to the GPO. The Gents slave movement may has a much higher than 'normal' coil resistance, or may be fed through a resistor?. Again, operation without undue 'force' would be a good guide you have it about right.

My suggestion is to use a variable supply, start low, and work up (which you have been trying) and find a voltage at which the toggle operates every 6 to 12 swings or so.

As to setting the toggle - it needs to have a suitable amplitude to turn the countwheels without excess 'recoil'. As an observation, the magnetic gap where the coils drive the armature on the pendulum needs to be as small as reasonably possible.
 
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Ryansclocks

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Jan 3, 2022
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Thankyou very much for your reply, I have ordered a power supply that has 12, 24, and 48v outputs. I will let you no how I get on thanks.
 

Ryansclocks

New User
Jan 3, 2022
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Well power supply arrived and got it all wired up. I tried 24v and got about 4swings between pulses. 48v and it does a good 20 swings. Was a good hour or two playing about adjusting the toggle left/right, the catch on pendulum up/down and playing with gap at magnet to get that tho. Have four dials now and they all run of the 12v output via relay but may need to use the 24v if I add any more I guess. Ps switch on left is to bypass relay if I run the c7 instead. Thanks for the help.
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