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Part 55/55a: Perforated slotted stripsPart 55 was originally a "rubber band", supplied from 1911 to 1913 in outfits 4 to 6. In 1921 the 5½'' slotted strip was introduced as the replacement part 55, joined by the 2'' slotted strip in 1922.
|55||Slotted strip, 5½''||1921||-||0||0||0||n/a|
|55a||Slotted strip, 2''||1922||-||1||2||2||N°9|
The partsThe slotted strips are a strange Meccano part, one of the very few with long slots allowing placement of bolts in any position. They were presumably designed to be useful in bracing frameworks where it is not possible to find bolt holes at standard spacing. They aren't quite as handy as they might be, as the resulting brace is only as secure as the bolt's ability to grip the edges of the hole.
The 5½'' strip is a fairly rare part, as it was never included in outfits. The 2'' strip is more common, and two were supplied in the largest outfits (7 and L), then in the 9 and above after 1937. It is particularly useful in small gearboxes and orreries, allowing non-standard spacing for unusual gear pairs.
EMP reports the 5½'' strip as being introduced in 1909 as part 7, then renumbered in 1921. I can't find any evidence for this. Help anyone?
Chronological variationsThe design of both parts has not changed since its introduction. Not many parts this early in the list that we can say that about!
Variations and odditiesNone known
Dealer spare parts boxes
Individual part numbersPart numbers for the parts on this page are as follows: Unique part numbers
For identification, each variation has been given a suffix to the main Meccano part number. These suffixes consist of a two-character code for the colour, and if there are many variations, a further number and sometimes letter code to identify each variation. See the bottom of the 'Parts' page for further details.
You don't need to worry what the codes are, just click on any one for a photograph.
The button above turns on and off the display of DMS numbers (where they are known). The DMS (Development of the Meccano System, Hauton and Hindemarsh) published in 1972 and added to in 75 and 82, suggested part numbers for every variation of every Meccano part. These numbers aren't perfect, but they are recognised and also referenced in the EMP (Encyclopedia of Meccano Parts, Don Blakeborough).
|Medium green (pre-war)||33||.mg1||.mg1|
|Nickel (Electrikit part 534) ||63-78||.ni1|
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Jeremy Jordan (at 10:55am, Tue 13th Jan, 15)
I have a perforated slotted strip that looks like the #55, except length of 2-5/8" and only one hole at each end.
NP (at 10:29am, Mon 22nd Apr, 13)
ah-ha - problem solved ages ago as this is already in the archive: http://www.nzmeccano.com/image-44754
NP (at 10:24am, Mon 22nd Apr, 13)
I've found I do have a copy of the relevant HSMD manual. Page 43 lists parts 7. Perforated Strip (slotted), 14cm long. and 8. Perforated Strip (flat, double), 32cm long. On Page 42, it shows that one of part 7 was included in Outfits B and C. As it was (apparently) not included in Outfit A, it is strangely not listed as being in the AA set...? Time to update the text above Charles!!
Paul, Woolwich, England (at 3:34pm, Sat 13th Jun, 09)
Meccano Magazine 'Models of the Month' sometimes used part 55. It was used to provide the 'quick return' for the Box Filling Machine, MM, January 1958.
Dick Watson (at 4:14am, Sat 8th Sep, 07)
I will scan the appropriate pages in my not very good photocopy of the HSMD but will wait a week or so in case someone can scan an original one. I will need an E-Mail address.
Dick Watson (at 10:05am, Tue 4th Sep, 07)
The 5 1/2" Slotted strip was designed for use in model no. B 5 in the Hornby System of Mechanical Demonstration Manual - Quick Return Motion. It is still often used for similar mechanisms. It was given the number 7 (probably filling the gap for the 1 1/2" Strip which disappeared for a while)