Miller-Sweeney Bridgeback.gif (800 bytes)Back
  See Notes  All Pictures are JPEG

Operation Console
Operation Console
65k

Control Panel
Control Panel
71k
Holding Brakes
Main Holding Brake 47k
Fender System
Fender System
  73k
Main Drive Gear
Main Drive Gear
46k
Machinery Room
Machinery Room 51k
Main Motor
Main Motor
43k
Bridge Side View
Side View 36k
Span From Above
Aerial View of span
32k
Stabilizer Strut
Stabilizer Strut 50k

Tower/Walkway
Walkway/Tower 47k

Shop Entrance and Walkway
Shop Entrance/Walkway
52k

The Pit
Pit Floor
35k

 

The Pit Floor and Shop Entrance pictures are copyright © Alfred Mangus

Notes on some of the pictures (from left to right):

The first picture is the operator console this is were the Bridge Tender releases the locks and operators the bridge.  The main control panel is located under the roadway of the bridge.  This panel allows the maintenance crew to shut down electrical-mechanical systems for repairs or maintenance.  There are two types of brake systems on Miller-Sweeney this is the holding brake.  We use this brake the hold the bridge in place after the service brakes stop the bridge.  The Fender system protects the bridge form collisions.  The Fenders are just like the bumper on a car.  This is one of the main drive gears as it meets the rack.  The machinery room houses all the motors, brakes gears, gears boxes and all other machinery propel the bridge.  The Main drive motor is a 75 hp electric motor.  The bridge has two of these motors normal operation both are running but the bridge can easily run on one motor.  If you look above the main motor in the picture you will see the seating/emergency motor.  A side view of the bridge seen from the Rail Road Bridge.  An aerial shot of the bridge you can clearly see the moveable portion of the bridge.  The stabilizer struts are attached to the counterweight and stabilize the counterweight when the bridge is moving.  These snapped off in the 1989 Loma Pretia Earthquake and the bridge was temporally out of service until repaired.  The pedestrian walkway with  a clear view of the operator tower.  A view of the shop and pier entrance, plus a look of the new rails and walkway that was installed.  You can see the struts, rack, and counterweight from the pit floor.  If you were standing on the floor you would be about 40 feet below the water surface.