Bux Measure

Map measurer of the month- The BUX map measure

The plastic Bux map measure frequently comes up for sale on the second hand market. This is a little surprising as it is amongst the simplest of map measurers ever manufactured. Often described as being made of bakelite, it is probably more likely to be catalin.

Bux measure works most easily with a 1″ to 1 mile map

Cheaply made, probably in the 1960s, the Bux measure was made in England and attempted to rival the far more expensive, more robust and certainly more accurate metal cased opisometers available from France, Switzerland and Germany.

Almost nothing seems to survive today that explains the origins of this little measure yet they were likely produced in their tens of thousands.

Each measure came in a small flapped paper envelope. This is printed with the simple to understand instructions on how to use.

Despite this type of measure having been used for many purposes- namely, with any undulating line that required measuring, the instructions that come with the measure only indicate use with maps.

THE BUX

MAP MEASURE

The measure is marked for scale 1″
to 1 mile. For 1/2″ to 1 mile simply
multiply the reading by 2; for 4
miles to 1″ multiply by 4 etc.
Before commencing a reading it is essential to 
see that the dial is at zero then to wheel the 
instrument lightly but firmly along the route
in the direction indicated by the arrow on
the case.

 

Bux map measurer in the envelope in which it was supplied

Bux map measurer in the envelope in which it was supplied

The Bux measure is very simple in construction. The small measure is moved by hand along a line on a map, pressing firmly onto the map when moving rotates the small metal wheel at the base. This has a fine toothed brass cog attached at its spindle, this in turn rotates another brass gear that engages with the plastic dial that rotates through the small window in the front. The gearing moves the dial through one fifth of a mile increments per inch of travel along a line on a map. Be it mapped path, bridleway, river or road.

Red and black numbering and incremental markings on Bux dials

Red and black numbering and incremental markings on Bux dials

A change was made in the colour of the plastic measuring dial at some point during its production. Numbering and increments on the dial changed from red to black, or vice versa. The dial is marked in five mile increments, so one full turn of the dial represents 50 miles of travel on a one inch scale map. Accuracy of measurement is pretty good.

So why is the measure called the ‘Bux’. Nothing seems to survive in print today to explain this. I can only hazard a guess, aided by the text that appears on the face of one of the examples that I have. This says ‘BUCK ENGLAND’. Buck almost certainly refers to the English County- Buckinghamshire. This Home County borders Greater London and was likely where the manufacturing was carried out. The word ‘Buckinghamshire’ is normally shortened to ‘Bucks’, and pronounced ‘Bux’.

The lighter plastic cased measure weighs 7.5g. The darker bodies, with a slightly different casting, weigh 8.2g. Three Points of the Compass has identified four generations of this little measure. These have one of the following:

Front of case Rear of case
text text
1″ = 1 ML

BUX

MADE IN ENGLAND PAT. PEND. large text, around case, no case recess
1″ = 1 ML

BUX

MADE IN ENGLAND PAT. PEND. small text, in case recess
1″ = 1 ML

BUX

  blank case recess
1″ = 1 ML

BUCK

ENGLAND

MADE IN ENGLAND PAT. PEND. large text, around case, no case recess
The rear of four generations of case castings

The front face of four generations of case castings

The rear of four generations of case casting

The rear of four generations of case casting

These little measures do not stand up there with the finest of scientific measuring instruments produced in the UK. They are a poor replacement for the finely made precision measurers made some fifty years prior. What they have done is bring such measures within reach of the pocket of just about anyone. They must have cost just pennies when new. Yet all four examples that are shown here still work, probably fifty to sixty years after manufacture.

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