*) A portable, full keyboard, direct key-driven machine. Designed for high-speed adding and subtracting. Subtracting via the nine complement method. It is duplex in operation, in that it will add in more than one column at a time, each column having the capacity to add, receive and carry simultaneously.
Content without guarantee! (UK); Inhalt Ohne Gewähr! (DL)
| Type name / number: | Burroughs Comptometer or Class 5 |
| Production / SN: | 5-810551 |
| Calculating principle: | Direct adding / key driven / Rocking Segment *) |
| Calculating functions: | Add, Subtract with nine complement |
| Input accuracy: | 9 digits |
| Calculating accuracy: | 10 digits |
| Extra's: | The key tops are in rows alternating with flat and dimpled tops for fast blind typing. Case not flat but old style frame and plate. |
| Designer: | |
| Production year: | 1910 - 1920 ? |
| Case material: | casted aluminum |
| Weight: | |
| External links: | |
| Previous owner: | Frits Huijbers, Wageningen , NL (picked up after deal on 15 different machines) |
| Cosmetic imperfections: (I accuse no one) |
on arrival were a few key tops are missing. see machine story. And the on a few locations the usual keyboard base paint damage occurs. The base material is turn up there. |
| Date of receiving: | 2010 - june, marktplaats |
| Machine story: | Machine was blocked on arrival. Massive cleaning of old oil residue. New oiled and case and key's cleaned. Machine is working properly. 2011-01-28 The missing key tops taken from an other, completely blocked machine. That bad machine had nice screws to fasten the cap. These are removed and put on this machine. |
the second machine
| Type name / number: | Burroughs Comptometer or Class 5 (High heels) |
| Production / SN: | 5-879969 |
| Calculating principle: | Rocking Segment (but direct interference, stead of handle activation, see *). |
| Calculating functions: | Add, Subtract with nine complement |
| Input accuracy: | 9 digits |
| Calculating accuracy: | 10 digits |
| Extra's: | The key tops are in rows alternating with flat and dimpled tops for fast blind typing. |
| Designer: | |
| Production year: | 1910 - 1920 ? |
| Case material: | metal |
| Weight: | |
| External links: | |
| Previous owner: | ebay |
| Cosmetic imperfections: (I accuse no one) |
The green keyboard layer and the right front corner of the case is showing the usual paint damage. The base material is turn up there. |
| Date of receiving: | 2011 - jan |
| Machine story: | Machine was 10% working on arrival. Despite this, a full cleaning of keyboard and internals are provided. |