1862 London Exhibition: Catalogue: Class V.: Stevens and Son
1302. STEVENS and SON, Darlington Works, Southwark.
Patent iron semaphore railway signals, and compensating signal wire apparatus.
1. PATENT WROUGHT IRON SEMAPHORE RAILWAY STATION SIGNAL, fitted with 8" lens lamp for oil, and improved apparatus, complete, ready for work.
One of these signals, when fixed at a railway station, acts for both the 'up' and 'down' lines for day and night. It is the most durable and effectual signal in use, and, although recently invented, it is already adopted on many of the lines in the United Kingdom, also in India, Australia, etc.; and, being made of open iron work, it is not acted on by the most violent gales; while the strong cast iron base renders it most secure and impervious to the decay to which timber signals are liable.
2. PATENT WROUGHT IRON DISTANT SIGNAL, fitted with Brydone's patent candle signal lamp and apparatus complete, ready for work.
These signals are fixed, in many instances, 1,800 yards from the railway stations, and are worked at that distance with the greatest facility, and with no more difficulty or uncertainty of action, than at 100 yards from the station.
3. PATENT CAST IRON DISTANT SIGNAL. These are made in cast iron, where only short signals are required; they possess all the advantages of the wrought iron signal, for heights not exceeding 20 ft., and are less in price.
4. PATENT COMPENSATING PULLOVER LEVER, with ratchet weight and chain complete. These levers are for working the auxiliary signals at a distance from the station, the lever being fixed at the station, or on the junction platform. The advantage of these over the ordinary levers is, that by means of the ratchet balance weight and rack fitted to the lever, the expansion or contraction of the wire through the variation of temperature is compensated.
5. THE PATENT COMPENSATOR. These are placed at intermediate points between the lever and the signal, in cases where wires of extraordinary length are required.
6. PATENT POINT INDICATOR. These are fixed at railway stations, etc., where there are frequently a number of diverging lines. It is desirable to have an efficient apparatus to show when the shifting rail or point is open or shut. These indicators show most distinctly, by day or night, the state of the points. By day the disc divides, and by night the lamp placed at the back of, or between the disc or discs, shows a red, green, or white light.