S&T reference folder 1969
John Wagstaff and David Josey who ran the FR Signal Gang from late 1968 were very much aware that most people in the gang were not railway signal engineers and many were not even professional railwaymen. Thus they did not have access to the documents and drawings that John and David had, working as they did in Croydon head office of the SR S&T. John and David therefore put together a series of drawings and issued them to regular members. Some of these drawings were copies of training sketches that the Southern Railway/Southern Region S&T training section issued, some were new drawings they drew ourselves. The SR S&T management were well aware of the excellent practical training that the young signal engineers were getting when volunteering on the FR, that they agreed to the use of these drawings. The drawings were Foolscap Folio size and were issued in ring backed folders to sub groups and individuals in the Signal Gang. As they are drawn on foolscap folio size sheets they do not quite scan vertically onto an A4 sheet, so some sheets are shown on two pages.
The object was to help individuals expand their knowledge of signalling matters and to act as a reference. Some were of more relevance to the FR than others, though including a third-rail conductor clearance drawing was surely tongue in cheek! The inclusion of a WBS style L miniature lever power frame was also done mischievously, though perhaps one could say, with hindsight, that they had prescience, as one is now working at Harbour Station. John and David were looking to the future when neither of them would be around the FR. These drawings are now offered to people in the same spirit. For the full folder index see S&T reference folder 1969 index.
Some of these drawings have been, and others will be, used to illustrate articles in the FR Heritage Group Journal. These articles are referenced against the appropriate drawing. Notes are attached to drawings to better explain the working and use of the equipment, and where it has been used on the FR.
S&T: Signal and Telecommunications (formerly Telegraph).
WBS: Westinghouse Brake & Signal Company - manufacturers of S&T equipment.
Sykes, Stevens: Other manufacturers of S&T equipment.
SG-1 Painting of levers in a signal box
SG-4 Painting of signals (two drawings)
SG-7 CLS Straight post
SG-8 Understanding the structure gauge
SG-11 Mechanical semaphore wire adjuster - screw
SG-12 Mechanical semaphore wire adjuster - wheel
SG-13 Mechanical Point Detection
SG-14 Mechanical Point operation (two drawings)
SG-15 Mechanical Point Compensator settings - Imperial
SG-16 Metal numbers & letters used to identify point ends – screwed to sleeper
SG-21 Simple mechanical locking explained (two drawings)
SG-23a Stevens elevated lever frame
SG-23b Stevens ground lever frame
SG-24 WBS A2/A3 elevated lever frame (four drawings) that were intended for use first at TYB
SG-25 WBS L style miniature lever frame as used in Porthmadog Harbour station signalbox.
SG-31 Methods of attaching circuit controllers to elevated lever frames
SG-34a Hand plunger
SG-34b Foot plunger
SG-40 WBS LCC - methods of attaching to elevated lever frame (two drawings)
SG-41 Circuit controller(CC) arrangements for a lever frame CC (two drawings)
SG-42 Circuit controller contacts and springs (two drawings)
SG-42 WBS lever lock operation (two drawings)
SG-44 WBS Lever lock & throw-down operation (two drawings)
SG-45 WBS Lever lock - lock proving & economiser contacts (two drawings)
SG-61 Rotary 2-way circuit controllers primarily designed for semaphore arm detection (two drawings)
SG-62 Upper quadrant semaphore - On & Off settings
SG-63 Fitting arm position detector to SR style shunt signal
SG-64 Electrical banner repeater signal (two drawings)
SG-72 -1&2 Silec Treadle (two drawings)
SG-76 Fouling bars - use of (two drawings)
SG-152 Signaling relay - DC neutral
SG-153 Signaling relay - DC interlocked
SG-156 Signaling relay - polar stick type (two drawings)
SG-157 Post Office relay - 3000 type (two drawings)
SG-158 Uniselector - principle of operation
SG-185 Single stroke bell (two drawings)
SG-301 Mechanical signal wire termination - using binding wire (two drawings)
SG-302 Mechinical signal wire - splicing two wires together (two drawings)
SG-303 Wire rope termination - sleeve method (two drawings)
SG-304 Telegraph pole - terminating a stay-wire using a thimble
SG-305 Telegraph pole - leading-in wires (two drawings)
SG-306 Telegraph pole - fixing braces
SG-307 Signal wire termination - without binding wire
SG-311 Insulated rail joint (IRJ)
SG-313 Track circuit rail bonding - straight joint
SG-347 Spagnoletti needle
SG-12 Mechanical semaphore with wheel adjuster that signalman could use. Used for signals further away from signalbox where the expansion & contraction of the signal wire, due to temperature changes during the day and night could affect the setting of the signal. Note. The Down Home somersault signal at Harbour had a 'sergeant' (vertical crank) in the wire run.
SG-24-1 Westinghouse Brake & Signal Company (WBS) style A2/A3 elevated lever frame – drawn by John Wagstaff. Such a WBS lever frame was going to be installed in the signalbox at Tan y Bwlch in the early 1970s
SG-25 WBS style L miniature lever frame,as now used at Harbour Station. The earlier K style frame had mechanical locking between levers actuated by the gearing below the lever, which in this drawing actuates contact bands that detect the position of the lever. The front electric lever lock shown is not needed on the K frame. FRHGJ 118 Summer 2014 has more details.
SG-40a WBS LCC – Lock & Circuit Controller - for a mechanical lever frame. A beautiful piece of equipment! Behind the lever, above the floor, was the preferred position - Tan y Bwlch signal box would have had such LCCs mounted in this position, with room for a technician to bend down to do maintenance and fault finding.
SG-63 Fitting of arm detector to SR style mechanical shunt signal. A similar shunt signal, without detector, was used at Dduallt as a mechanical banner repeater to the first mechanical Up Home signal
SG-64b The small banner repeater on the FR platform at Harbour Station (old goods shed wall) is similar to these drawings. Originally the Harbour repeater was unusually a red stop signal before finding its way to the FR.
SG-72-1 JMW sketch of Silec Treadle. See Train detection for how they were used c1970 to replace colour light and motor operated semaphore signals to RED by the passage of a train.
SG-76a. Fouling bars are used at Rhiw Goch. In the diagram lever 4 works a mechanical fouling bar.
SG-152 Shelf mounted relays were used in mechanical lever frame signal boxes from the early days of widely used electricity for additional interlocking and the control of electrical signals – whether colour light or motor operated semaphore. On the FR c1970 they allowed electrical point detection and opposing locking to be added to the controls of the colour light home signals and the motor operated Up Advance at Harbour. They came in 4 and 6 contact versions.
SG-153 Mechanically interlocked relays – actually two relays mounted together, with both mechanical and electrical means preventing both relays being energised at the same time. They were usually used for point detection. Very large, and more modern versions of this configuration were used at Minffordd in the second stage of its re-signalling in the early/middle 1970s.
SG-156a Polar relays, though not the stick type, were often used in mechanical signaling to detect the position of a semaphore arm. They were very low current relays that were operated from a battery at the signal with a centre tap. Thus they used only three wires, or just two if earth return was used, to detect the arm in the ON and the OFF position – see SG-62 for arm settings.
SG-156b This diagram shows the 'stick' circuit. The relay stayed in the last position called, until called to the other position. Indicators, showing the position of a signal, were often wired in series with these relays and operated in a similar manner. They were usually mounted on the block shelf fascia board. Non-stick devices, such as arm repeater indicators hang vertically unless called to either the right or the left.