[time-nuts] Three HP oldies

[Pete Lancashire]

Other then the damage to the 1 rev per second wheel it looks like will
not take much to clean up. My corrent idea
is to start off with making a replacement on a laser printer and once
I'm comfortable with how it looks have a few scales made on
photographic paper. One discount retailer here in the US, Costco will
do 8x10" prints from .jpg files for $1.50 USD each. Cheap
enough to experiment.

The 116AR although totally impractical will still be fun to bring back
to life, but will be some time. Will need to find a manual
first.

-pete



On Mon, Mar 12, 2012 at 9:20 AM, John Howell <j at howell61.f9.co.uk> wrote:
> I'll second that Rob!
>
> I have the HP 115BR and, what I believe to be a British version made for the Royal Navy by McMichael. Pictured here:
>
> http://www.flickr.com/photos/75ohm/6829984174/
> and here
> http://www.flickr.com/photos/75ohm/6976111697/
>
> Called a 'Clock Direct Reading' & carrying NSN 6645-99-972-5270 this incredibly well made device requires a 100KHz input which is divided to 1KHz. This powers a Muirhead motor with an armature speed of 10,000 RPM. This is then geared down to drive a mechanical digital readout. The display can be advanced or retarded using a handwheel which operates a differential gear in the drivetrain. There is a 'pips' output which is 100mS of 1KHz every second.
>
> I would be most interested to hear from anyone with information about this device, how and where it was used, circuitry etc.
>
> John Howell (in the UK).
>
>
> On 12 Mar 2012, at 10:36, Rob Kimberley wrote:
>
>> Lovely stuff!!
>> Rob
>>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of Pete Lancashire
>> Sent: 11 March 2012 17:56
>> To: Discussion of precise time and frequency measurement
>> Subject: [time-nuts] Three HP oldies
>>
>> 101A
>> https://plus.google.com/u/0/photos/111617808980322733757/albums/571869450289
>> 0226481
>>
>> 115CR
>> https://plus.google.com/u/0/photos/111617808980322733757/albums/571869789245
>> 1866241
>>
>> 116AR
>> https://plus.google.com/u/0/photos/111617808980322733757/albums/571869946252
>> 1152657
>>
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