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- From: pcl@oxford.ac.uk (Paul Leyland)
- Newsgroups: alt.folklore.computers,sci.math,rec.antiques
- Subject: Re: Swedish Adding Machine -- Help Wanted
- Message-ID: <PCL.92Nov20150655@black.oxford.ac.uk>
- Date: 20 Nov 92 15:06:55 GMT
- References: <PCL.92Nov19174841@black.oxford.ac.uk> <PCL.92Nov20145646@black.oxford.ac.uk>
- Organization: Oxford University Computing Service, 13 Banbury Rd, Oxford, OX2
- 6NN
- Lines: 39
- In-reply-to: pcl@oxford.ac.uk's message of 20 Nov 92 14:56:4
-
- In article <PCL.92Nov20145646@black.oxford.ac.uk> pcl@oxford.ac.uk (Paul Leyland) writes:
- (Really Magnus Olsson <magnus@thep.lu.se> ) writes:
-
- In article <PCL.92Nov19174841@black.oxford.ac.uk> pcl@oxford.ac.uk (Paul Leyland) writes:
-
- >Last weekend, I acquired a wind-up mechanical adding machine.
-
- "Wind-up" is perhaps not the best description, as it's not driven by a
- clockwork! For those who've never seen such a beast: it represents
-
- "Wind-up" was chosen to distinguish it from the motor-driven versions.
- It is operated by winding a hand-crank. I should perhaps have called
- it a "hand-cranked mechanical adding machine".
-
- From my childhood in the seventies I remember seeing these machines
- everywhere - offices, post offices, etc. The hand-cranked models were
- sold right until the end. The original models (late 19th century) had
- a set of levers for setting the registers; later models (mid 20th
- century) had a keyboard. Still later models had an electric motor
- instead of the hand crank. The most expensive models also had an
- electromechanical printer, and a "microprogram" for doing division. I
- remember typing in the division 0 / 0 on one of these beast, to see it
- chug away happily in an infinite loop.
-
- My model has the set of levers moving in slots to set the register.
- So it looks like mine was designed many decades ago, but I stand by my
- estimate (for the moment) of its manufacture date, based on its
- physical condition, and the materials used. There's a sliding
- pointer, for instance, made of some plastic which looks like nylon.
- The name plate is glued into position with something rather like epoxy
- resin.
-
- Paul
-
- --
- Paul Leyland <pcl@oxford.ac.uk> | Hanging on in quiet desperation is
- Oxford University Computing Service | the English way.
- 13 Banbury Road, Oxford, OX2 6NN, UK | The time is come, the song is over.
- Tel: +44-865-273200 Fax: +44-865-273275 | Thought I'd something more to say.
-