A note with some reflections and extras on various previous posts:
Post 255, Conductor rails alongside platforms – when did they disappear?
A very few places on the network cannot avoid these things, of course, but there was early recognition that the hazard needed to be dealt with wherever practicable. On the Metropolitan, there’s a note in Minute Books from 1908 about moving the positive rail to the ‘six-foot’ with protection boards at a cost of £9 per station, to be done on maintenance. My random small sample of museum images found only odd remaining instances of the old practice by the 1920s. I’d suggest that the Underground Group took a similar approach.
Post 231 Starting arrangements for trains
There’s mention of starting arrangements for trains using a pair of wires above the platform at the Guard’s position. As an aside, I looked up some papers on the Metropolitan’s initial project to install these from the 1920s. There was a separate indicator aspect [probably black letter S on an opal background, back-lit] below the platform starting signal, and there was a bell, both set up when the wires were bridged by the Guard, and cancelled on departure. Another additional feature – a 4” ‘sheep gong’ at the rear of the platform that gave the Guard an indication of when the circuit had been made. Operating voltage for the controls was 120v, and the Guard’s wires were fed from 14 dry cells at 1.5 volts each, in series.
The image included here is a 2008 view showing Baker Street platform 3 Northbound starter, with a small legacy of the starting system installation remaining a few decades after the rest had been swept away. In this instance the signal head incorporated the starting indicator, below the stop aspect. It was not removed after decommissioning of the starting system, simply disused.
Post 234 - dating of the view of loco 11 at Baker Street, also referring to posts 231 [loco 9 at Baker Street 16 May 1937 ], 236, 237, 240, 268, 277, 280
I support the conclusion so far that the two views of electric locomotives at Baker Street are close in date. I’d say the date range was 1937 to 1939, 1938 most probable. For interest and completeness, here are small further circumstantial clues and some relevant asides, taken mostly from archived drawings.
Note in the loco 11 image a buffer stop of traditional appearance at the end of the loco siding.
Look above the signal box roof in both images, to see vestigial evidence of construction works, a crane runway and a crane on wheels.
Site plans show that this specific area was the construction and subsequent ventilation shaft above the new Southbound Bakerloo platform. Before, there had been an allotment in that area. I’d suggest that, along with the museum images of the same time, the construction activity on view is connected mostly to the Bakerloo extension. Works included a new escalator shaft down to the two Bakerloo Southbound platforms, and a circulating area connecting their top landings to the existing Metropolitan subway. There’s a drawing showing evidence of significant excavation for the circulating area beneath platform 4 and the track alongside it.
The timber structure looks to be a light roadway, either for a light mobile crane or for a rear-tipping vehicle to discharge to the lower level, and could have assisted with later stages of the shaft, escalator or subway works.
I speculate that the shaft was built with an expectation of a structure above it, and there may have been very early intentions for a canteen to be there.
There was another piece of construction activity affecting the loco siding, taking place around 1940 [the drawing date]. The loco siding was extended slightly, along with its pit, with a new concrete stop block. There was a 1939 drawing showing relative positions of buffers for locomotives, steam and electric stock, and 1938 Surface Stock leading me to speculate that the siding alterations/improvements included making sure it could accommodate a 2-car unit when uncoupling was taking place.
1943 is the very earliest that there’s any mention or sign of canteen in the surviving drawings with an existing site plan marked up with some key dimensions and levels. In the November of that year there is an initial block outline plan for the canteen site to-be. The twist here is that the mark-up plan includes a sketched hint of a clash between the newly-constructed buffer stop and siding end, and the canteen scheme. A pile cap was needed to support a column underneath the canteen superstructure, and the siding end was in the way. The change is confirmed by a 1946 drawing that shows siding length reduced by 8’ 9” and fitting of an LT-style metal buffer stop which may well have lasted until the redundancy of the siding.
Post 261 Moorgate 19 April 1962 and Q Stock [and posts 262, 265, 267, 270, 280]
The clue was in the date for the photograph, Maundy Thursday. In that era, on the working afternoon preceding a Bank Holiday, District Putney Bridge to Edgware Road trips were extended to Aldgate and timetables reissued specifically as part of the holiday service changes. I speculate that the extended services provided for increased through traffic flows over the section. There might have been some side advantages for route familiarity and for rostering.
There are other internet images of Q Stock on the North side of the Circle, and not only because of the District Sunday trips on the Circle.
https://www.flickr.com/photos/mildmaypark/43833305925
https://www.facebook.com/groups/211521822550584/permalink/260090394360393/
Post 324 and a YD question
On Met. locomotives and rivets, I can help a bit. First, just for my research, where was the mention of rivets that prompted your interest? What’s the number of the loco you intend to build? – this will influence the answer.
There is a reasonably good starting point in the drawing incorporated in the second edition of Mr Benest’s book on the locomotives. It does need to be used with care and caveats, and does not give the total answer on its own. I can tailor a fuller answer depending on choice of loco number.
I think that’s all the old loose ends, other than continuing work on the identities of photographers.