Historic Photographs

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South Station Tower No. 1 & Interlocking System, Dewey Square, Boston, Suffolk County, MA



See 46 maps of this location


B&W Photos

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Data Pages


Photo Caption Pages


Item Title


Location
Dewey Square, Boston, MA

Find maps of Boston, MA


Created/Published
Documentation compiled after 1968.

Notes
Survey number HAER MA-58
Building/structure dates: 1897 initial construction
Building/structure dates: 1939 subsequent work
Building/structure dates: 1959 subsequent work
Building/structure dates: 1970 subsequent work
Building/structure dates: 1977 subsequent work
Significance: South Station's interlocking system was a prototypical solution to the problem of handling the huge numbers of track and signal changes required at a large railroad terminal. The interlocking system, Tower 1, and its electro-pneumatic interlocking machine were important elements in the design and historical operation of South Station, which was America's largest and busiest railroad station for many years.

Subjects
Commerce
Fires
Depressions


Related Names
Massachusetts Bay Transportation Authority
Saxby, John
Saxby & Farmer
Union Switch & Signal Company
Westinghouse, George
South Cove Associates
Barrett, William Edmund, Photographer
Artemel, Janice G., Historian
Gallagher, E., Historian


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. VIEW, LOOKING NORTH, SHOWING SOUTHWEST AND SOUTHEAST ELEVATIONS OF TOWER
2. VIEW, LOOKING NORTHEAST, SHOWING NORTHWEST AND SOUTHWEST ELEVATIONS OF TOWER
3. VIEW, LOOKING SOUTH, SHOWING NORTHWEST ELEVATION OF TOWER AND SIGNAL BRIDGE No. 7 AT RIGHT
4. VIEW, LOOKING SOUTHEAST, SHOWING NORTHWEST ELEVATION OF TOWER ND SIGNAL BRIDGE No. 6 AND DWARF SIGNAL IN FOREGROUND
5. DETAIL VIEW OF SWITCH RELAY CASE, FIRST FLOOR
6. VIEW OF 'ALTERNATING CURRENT-DIRECT CURRENT' MOTOR GENERATOR SET AND POWER SUPPLY CONTROLS, SECOND FLOOR
7. DETAIL VIEW OF WESTON GAUGE WITH PLATE GIVING PATENT DATES, SECOND FLOOR
8. VIEW, LOOKING NORTH, OF INTERLOCKING MACHINE WITH ORIGINAL MODEL BOARD IN CENTER AND MODEL SEMAPHORE SIGNALS (AT TOP OF PHOTOGRAPH), THIRD FLOOR
9. VIEW, LOOKING SOUTH, OF INTERLOCKING MACHINE, WITH ORIGINAL MODEL BOARD IN CENTER, NEW MODEL BOARD AT LEFT AND MODEL SEMAPHORES AT TOP OF PHOTOGRAPH, THIRD FLOOR
10. VIEW, LOOKING SOUTH, OF INTERLOCKING MACHINE AND INDICATORS (AT TOP OF PHOTOGRAPH), THIRD FLOOR
11. VIEW OF INTERLOCKING MACHINE, DETAIL OF MACHINE LEVERS AND LOCKING BED, THIRD FLOOR
12. DETAIL VIEW OF ORIGINAL MODEL BOARD MOUNTED ON INTERLOCKING MACHINE, THIRD FLOOR
13. DETAIL VIEW OF MODEL SEMAPHORES AND NEW MODEL BOARD, THIRD FLOOR
14. VIEW OF INDICATORS ABOVE WINDOW AT TOWER HEAD (NORTH END), THIRD FLOOR
15. VIEW, LOOKING NORTH, SHOWING SIGNAL BRIDGE No. 7, STATION YARD AND TOWER 1
16. VIEW, LOOKING SOUTH, SHOWING SIGNAL BRIDGES AND TOWER 1
17. VIEW, LOOKING NORTH TOWARD STATION, SHOWING SIGNAL BRIDGE No. 1 WITH TOWER 1 AT RIGHT
18. DETAIL VIEW OF SEMAPHORE SIGNALS ON SIGNAL BRIDGE No. 7, LOOKING NORTH
19. VIEW, LOOKING NORTH TOWARD STATION HEADHOUSE, SHOWING STATION PLATFORMS
20. VIEW OF NEWER 7-LEVER INTERLOCKING MACHINE IN FOREGROUND, NEXT TO ORIGINAL INTERLOCKING MACHINE, THIRD FLOOR


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