11C

Odd one out.

This one is very much electronic, not mechanical.

Also it is a departure, not an arrival.

Similar to many slide rules, it has some useful information on the back. Not conversion tables, but instructions on the more advanced use of the calculator. (As had the more simple Lawrence slide rules.)

This is an 11C (obviously...), of the 'Voyager' line of scientific calculators introduced by HP in '81. By then, the electronic calculator had well and truly rendered the slide-rule obsolete. Even though it's already 30+ years old, this specimen still works fine. Come to that, it has no dependancies on external 'networks', replaceable batteries, is low power and has no moving parts - it should remain functional for a while still.

There are collectors of early electronic calculators, and especially of the early HP scientific calculators.

Last week I got asked via-via by a collector of early calculators if perhaps knew of or had one of these that I'd be willing to let go of. I had and I was. So this particular specimen has now been passed on to a collector who was looking for one of these :-)

Polyphase duplex

Recently arrived a small, elongated package.

The leather is a bit worn and the embossing faded, but the marking 4088-3S can be read on the flap, with 'K&E polyphase duplex slide rule' on the end.

And inside this 4088-3S leather sleeve is indeed a Keuffel & Esser Polyphase Duplex slide rule, model number 4088 version 3. Quite common in North America, but much less so  in continental Europe.

Had not seen or used a duplex before, so took a chance when spotting this basic model. Duplex meaning the slide is usable at both sides, the stock being held together by the metal clamps at the ends.

It was somewhat dirty and 'stuck solid', but cleaned up very nicely. Everything can be screwed apart and cleaned carefully. A basic polish and removing of dirt, using an eraser / rubber to remove stains and even out / lighten the yellowed celluloid. Carefully clean the glass to not accidentally remove the hairline. Putting it all back together again with some care to get the alignments right (well, good enough). On one edge the celluloid has lifted and warped, so re-mounted the cursor 'flipped over' to run on the smoothest side. After the cleaning and some adjustment it slides very smoothly.

The 4088 is a fairly basic duplex rule, many later duplex rules go rather overboard with log-log scales. The front of this rule has, to continental eyes, odd scales; no AB, but folded CD scales (by pi) with an inverted CF. This deviation from the Mannheim is actually very neat and handy for the basic operations - clever.

The rule being duplex, the AB scales have been moved to the back of the rule, with an inverted C and regular D. The reverse also has the K, L and the sine and tangent scales, making it look quite crowded.

The serial number 378790 puts this as an early 'thirties rule - the K&E serials are a bit of an approximation, reading the graphs would make it around 1931-ish. The cursor however has the flanges at the corners to protect the glass from chipping. From the online sources on slide rules (yes, there is definitely a slide-rule-O-sphere on the internet), this type of cursor was made between '33 and '35. Assuming this is not a replacement runner, this rule was likely manufactured in 1933.

After 85 years, still giving results to three digits :-)

Marked down

As the price for typewriters on online classifieds and auctions seems to escalate, the amount of machines in local thrift shops seems down. This may be related, or pure chance of course.

In a round of a few local second-hand shops including a very large one, only one typewriter was spotted. This one had been in the store for a while and was now marked down from 15 to an 8 Euro asking price.

By now it was tucked away in a dark corner, jammed and looking rather forlorn. The top-cover is badly mauled and the Remington emblem is broken. A spare top cover from a portable is included with an intact emblem, should the buyer want to fix it up. Apart from the cosmetic state and a tabulator-bar that has warped out of shape it seems to be in good shape and fully working condition. Even a dust-cover is thrown into the package.

Alas, no sale even for 8 Euro. Would be fun to tinker with, but wrong period for the collection and rather too large to insert unobtrusively into the house.

On that, the amounts being offered for nice, clean pre-war portables looks to be going through a bit of a spike here. On the one hand there are a few traders that buy and then re-sell the machines via more international outlets for a several hundred (and they apparently do sell, looking at the shop-sites data). On the other hand the value attributed by many to these obsolete machines may well have gone up over the past few years. Even when not 'collecting', then as an item to have one of. Some as a static and transient 'interior decoration' for sure, but also some to have and keep one working machine.

In its distressed state, the Remington would fit the bill as a 'vintage' looking prop. A steal at the price. It may sell yet :-)

Stories of famous inventions - part one: The Typewriter

The January 1928 issue of the Meccano Magazine with an image on the cover for the article on the building of the Panama Canal. Many more articles inside on various feats of engineering, science and of course Meccano.

Also in this issue is the first instalment in a series about famous inventions. The header of the series contains a list of notable inventions. There are the expected items such as the steam engine, the sewing machine, the motorcar and the typewriter. Oddly missing (for '28) is radio. On the other hand it does mention noctovision. But to get back to this first article - the story of the invention of the typewriter.

The article gives a quick historical long view and then goes into more detail on how the 'startup' of Glidden happened, including the 'pivot' from a numbering machine to the general purpose writing machine. (To put it in today's terms.)

All back issues of the Meccano Magazine can all be read online at the Internet Archive. This link opens the January 1928 issue, browse to page 10 for the article.

For reading convenience, the pages also included below.

It is our earnest desire

...it is our earnest desire that [it] shall give the greatest satisfaction.

Those sentiments came with an online purchase that arrived last week. This is clearly a phrase that is not from a recent warranty statement. In fact it was included with a nearly a century old toy. Much worn and the box has lost its lid and some of its shape, but the instruction leaflet was still included.

The clockwork motor itself has some spots of rust on the outside, but otherwise is still in fine working order. They were right in their claim that the Meccano Clockwork motor will do excellent service for many years.

The printing code on the leaflet dates this to February 1920. A next known printing run of this leaflet is September 1921, so the motor likely dates from some time between the two dates. The text and layout of this leaflet likely date to 1916, when Meccano started making their own motors. They had been buying these from Märklin originally, but the Great War (World War I) halted that supply of course.

This clockwork motor would have been very much a luxury item in 1920, affordable only by the well-off. (As was Meccano, to be honest.) These motors were then still supplied in 'austerity' plain strawboard boxes and only by the mid twenties were the boxes upgraded to a blue fully labeled version. Today these motors are still (or again) not all that cheap, but thankfully well within reach of many now.

Also today there is the wonder of digital image editing. With a scanned image of the old leaflet, a cleaned version was created and printed to go with the motor in a newly made box.

On the other hand it turned out that today it is not so easy to find matching brown paperboard made from straw. A century ago this would have been the raw material for nearly all paperboard, but today it nearly all is grey paper-pulp board. The local crafts-store here sell a large sheet of this 2mm thick board for a very modest sum.

Some yellow watercolour ink can create a more yellow/brown colour of the board to match the original box. What proved more difficult is that the modern board is very dense in comparison to the old strawboard and near impossible to crease and bend cleanly. It will break at the edges. Nevertheless a new lid and also a new box base were made from the grey board. More of an impression than an exact replica, but it does look the part and serves its purpose of storing the motor safely. A reproduction label then added to complete the impression of the article when new.

From references on the net (no interest so niche...), this particular motor can be identified as a nickel motor of the 'Meccanoland designation' type 6. It has the letter stamping not on the reversing lever, but on the motor side-plate. These motors are known with F, J or K, this one has a 'K'. Am curious, but have no idea on the meaning of the letter (could be initial of the person that assembled it? the subcontractor that supplied it?).

Should you have one of these early Meccano Clockwork motors that inadvertently lost its paperwork some time during the last century; an image of the instruction leaflet below - measures about 200 by 255mm:

And a newly created small reproduction box lid label:

The whole point of this new box and leaflet were to add it to the newly boxed set of nickel Meccano. Now also the motorised models in the 1920 book of models can be made. Such as this Mechanical Hammer (model 147). (There's a subject you're unlikely to find in today's construction toys! - can't see a mechanical hammer appealing much today - unsure what appeal it had back then. Perhaps it was still modern and a marvel of progress...)

In a quickly assembled model, the motor does its work fine.

Very noisy. Surprisingly noisy. This model must've annoyed the rest of the family and possibly the neighbours, also in 1920 :-)

About succulents and Royal

Recently picked up an album - a so-called 'Verkade album'. Between '03 and '40 the cake-manufacturer Verkade published these illustrated albums, with the illustrations enclosed with the company's product. (Collect them all...)

This is a 1932 album; 'Vetplanten' ('Succulents'). The undoubtedly knowledgeable Mr van Laren gives much and varied information on the care of succulent plants and the various species thereof.

Notable on the title-page of the album is the mention that it was printed and bound by Blikman and Sartorius, Amsterdam.

In the field of typewriters in The Netherlands that is a familiar name; they were the importers/distributors for Royal typewriters. They are notable for having pasted their company name on each and every typewriter they supplied. So much so that often on the local online-ads site there is listed a 'Blikman & Sartorius' typewriter for sale, model 'Royal'. (They were however by no means the only importer to do so. James Plant prominently labeled every Underwood that passed his warehouse and Ruys tagged all Olivetti machines with their own brand. Blikman & Sartorius were the most consistent and 'visible' in doing this, though.)

As example of their eagerness to place their name, they went to the trouble of taking this Royal De Luxe portable machine out of the case and rub off the 'touch-control' label. They then put their company name prominently on the centre front of the machine.

It was perhaps a company policy; everything that leaves the door gets labeled :)

Well preserved motor - kept in its box

It must have been always kept in its box, a fine Meccano number 2 clockwork motor. This was for the Dutch market, a 'Veermotor No.2'.

Where the label has worn away on the box lid, it could be seen that the Dutch label is a paper pasted over an English printed box. The motor inside is in a surprisingly good condition. With the paint good still and really no rust, this motor is altogether too nice to play and build with today.

Even the spring is clean and free from corrosion - like new.

The included instruction sheet is multilingual and also a bit strange. The Meccano company made the effort to print and paste a Dutch label on the box and then included instructions in English, German, French and Spanish. No instructions in Dutch.

Another strange thing is that the Dutch warranty slip is pasted over the remnants of a torn-out slip. From the remaining printing codes, both seem from the same era (printer code suggests 1931). An original 'U' (United Kingdom?) slip was replaced with an 'H' slip (Holland, likely). Seems very sloppy for such an expensive item. Perhaps needed to quickly fill an unexpected export order, but still.

Had bought this item to get a dark red motor to go with the period set for building. On the pictures of the listing it looked decent enough and was stated to be in working condition. When I got it, it turned out to be that this particular motor is too well preserved to mar with screws. It'll mostly continue being kept in its box. A very nice time capsule nevertheless :)

Below a larger resolution image of the instruction sheet, should you have one of these and be curious on its use :-)