24 January 2013

Figment of my imagination

After seeing the portable workbench (just the top part on the picture) from Jonas Jensen presented by Chris Schwarz,

I thought the vise at the right looks similar to the one used at l'atelier Boulle for tenon cutting, a boite à tenon to be used with a horizontal saw (scie à enraser).

So,  is the workbench related to the tenon box?  To justify this I have to find a meaning to the left part of the portable workbench - tenon box

What about the long vise,  is it for making long tenons?
.... Exactly.  Long tenons are uncommon for frames, but in beds the front and back frame is joined with two boards and these use a tenon and a metal screw to make it possible to assemble disassemble the beds.

Bed details as seen by Roubo in l'art du menuisier

The real thing with a 50cm (20") wide board of a bed side with tenon,  that's a close fit for the Jonas Jensen bench.

I see,  but the benchdogs on the workbench, what's their use?
I am glad you asked, .... that .... it's for  .... rip cutting the tenon.  This is normally done with a frame saw,  but here the tenon is too long.  A back saw could do it,  but that's uncommon in some workshops.  So the sides are set flat on the frame and a mobile surface is clamped in the long vice, set level with the sides of the tenon and cut with the same saw.

Cross section of the saw raised to the correct height for a horizontal cut of the tenon.

So, a bed-maker-tenon-cutting-jig?
Maybe for some and it became a portable workbench for others.
That or it's simply a workbench that is just so good it can even be used as a boite à tenons.

03 January 2013

Wooden planes - Dutch names et al.

Sixth post in a series about western wooden planes

After mentioning German and French wooden planes I wanted to finish the list with the Dutch names.  Here I got the help of woodworking.nl a Dutch woodworkers forum referencing the richness of the toolemera.com archive: Album van schaven en gereedschappen, the 1900 more or less trilingual catalog from a Amsterdam merchant with four sections: Dutch,  Belgian-French, English and American planes. The American section is about the metal Stanley planes.  It is also the only part of the catalog mentionning sizes. Pro memore: the official languages in Belgium are Dutch, French and German

Dutch planes

Roffel (scrub plane  available as flat hollow round)
Voorloper (fore plane)
Rijschaaf (jointer)
Blokschaaf (smoothing plane available as flat hollow round)
Gerfschaaf (block plane (?) available as flat hollow round)
Spookschaaf (spokeshave)
Grondschaaf (router)
Boorschaaf (rabbet plane)
Overzijboorschaaf (T-head rabbet plane)
Overzijschaaf ( paired wedge-shaped side rabbet plane)

Rijschaaf is reischaaf nowadays,  both have the same pronunciation. It's also closer to reilat, a straight-ening edge for concrete or more woodwise winding sticks. The difference between a roffel and voorloper could just be the handle,  one has an open handle (toot) and the other a closed one. The roffel can be delivered with a second (front) tote. The name roffel has French roots, so riflard a French scrub plane is probably close.
Rijschaaf - Voorloper



Belgian-French planes (Dutch and French)

voorloper - demi joindresse
rijschaaf - joindresse
blokschaaf - petit rabot
tandschaaf - petit rabot à dents
boorschaaf - guillame
overzijboorschaaf - guillaume à côtés

Here the riflard - varlope found in post 5 is a demi joindresse - joindresse. Voorloper means something alike front runner in Dutch,  varlope is unrelated to anything I know in French but for the Dutch word voorloper.

English planes (Dutch and English)

roffel - jack plane
voorloper - trying plane
rijschaaf - jointer
blokschaaf - smoothing plane (coffin shaped)
tandschaaf- toothing plane (coffin shaped)
boorschaaf - rebate plane
overzijboorschaaf - rebate plane

Roffel, a scrub plane, has an open handle just as the Jack Plane,  whatever the perceived function of the later is.

The shoulder plane is missing, but as explained on the forum it can be done with a saw. To align the shoulders of a mortise and tenon joint, the joint is slightly opened and then the kerf is sawed with a light touch on both sides. This sets them to the same width and parallel without much thought and repetitive assembly-disassembly.  To access narrow places there is also the overzijboorschaaf (T-head rabbet plane) and the overzijschaaf(  paired wedge-shaped side rabbet plane).

 All together now

If I put what I have together, looking more at form than function,  I get something like:

roffel - jack plane - riflard
voorloper - try plane, fore plane - varlope, demi joindresse
reischaaf, rijschaaf - jointer - joindresse, varlope
blokschaaf - smoothing plane - (petit) rabot
boorschaaf - rebate plane - guillaume
grondschaaf - router plane -guimbarde
spookschaaf - spokeshave - wastringue