WTT notation

[Richard Mawer]

I’m not sure if I am dreaming this or not, but I recall seeing train times expressed in 12 hour clock format ( as opposed to 24 hour clock) in some WTTs using different notation to signify am or pm. Was one written with a / between hours and minutes and the other 12 hours written with a : or - or something?

 

Eg 6-30 meaning am and 6/30 meaning pm..... or something like that?

 

Can anyone shed any light?

 

Rich

[Clearwater]

Yes, I'd noticed that some timetables,in gwrj used a different form of telling the time than the modern hhmm format we're used to.

 

David

[TheSignalEngineer]

The 12-hour clock was used for all timetables up to the 1960s. The WR changed to 24-hour times in 1964 and other regions in 1965.

 

In the WR WTT the timing columns had am or PM at the top depending on whether the time was before or after noon at the first entry in the column. Arrival/departure times were shown in Bold whilst passing times were shown in thin characters. There was a space between the hours and minutes and this sometimes had a symbol or letter in such as 10*56 denoted a train being looped for another to pass. There were no leading zeroes in either the hours or minutes.

 

Typewritten Special Notices and amendment sheets used other symbols between the times. IIRC a slash with a hyphen superimposed was a passing time.

 

Date typo corrected.

Edited August 28, 2018 by TheSignalEngineer

[kevinlms]

The 12-hour clock was used for all timetables up to the 1960s. The WR changed to 24-hour times in 1664 and other regions in 1965.

 

In the WR WTT the timing columns had am or PM at the top depending on whether the time was before or after noon at the first entry in the column. Arrival/departure times were shown in Bold whilst passing times were shown in thin characters. There was a space between the hours and minutes and this sometimes had a symbol or letter in such as 10*56 denoted a train being looped for another to pass. There were no leading zeroes in either the hours or minutes.

 

Typewritten Special Notices and amendment sheets used other symbols between the times. IIRC a slash with a hyphen superimposed was a passing time.

Wow the GWR, was well ahead of their time!

Edited August 28, 2018 by kevinlms

[Gilbert]

Wow the GWR, was well ahead of their time!

That Brunel chap was really quite sharp..

[TheSignalEngineer]

A bit sharper than me at midnight.

[Richard Mawer]

Thanks chaps.