The Strauss Bascule Bridge Company, Inc., engineers and designers of trunnion, bascule and direct lift bridges. . ependent elec-tric power lines are available, other secondary-power equipment may be omitted. The operating machinery is designed toovercome the friction, inertia and the winrl andthe normal speed of opening or closing averagesfrom 1 to 2 minutes. The secondary or emergencyequipment is usually designed to operate thebridge in slower time since its use is infrequent. 2. BRAKES: Strauss bridges are equippedwith both service and emergency brakes forarresting the movement of the bridge
The Strauss Bascule Bridge Company, Inc., engineers and designers of trunnion, bascule and direct lift bridges. . ependent elec-tric power lines are available, other secondary-power equipment may be omitted. The operating machinery is designed toovercome the friction, inertia and the winrl andthe normal speed of opening or closing averagesfrom 1 to 2 minutes. The secondary or emergencyequipment is usually designed to operate thebridge in slower time since its use is infrequent. 2. BRAKES: Strauss bridges are equippedwith both service and emergency brakes forarresting the movement of the bridge. Theservice brakes are used under ordinary conditionsand the emergencv brakes, as the name implies,are Used for extraordinary conditions, as forinstance, any failure of the service brake in caseof an unusual unbalanced load on the bridgesuch as snow or a high wind. The service brakes on electrically operatedbridges are usually operated by a solenoid, i. e , an electro-magnetic device. They are usually manufactured and furnished by the makers of the standard types of electric motors and are i ted , ,,,, . ,,. The. Strauss Bascule Bridge Company of operation, it can be kept out of action at thewill of the operator. The air operated emergency brake acts en-tirelj independently of the operating machinery and is best adapted for use on our larger andheavier bridges. Fig. 32 illustrates this type ofemergency brake on the Delaware, Lackawanna <N. Western R. R. (heel trunnion) bridge at Buffalo. The braking force is applied directly on the llaiigc- of the operating struts, the brake mechanismbeing mounted on the operating strut 33 illustrates a similar installation on Northern Railway (heel trunnion) bridge at rake shoes are made iges ol the operating In bridgesengines or hand powei and crated bridges, hand brakes the solenoid brakes,es are operated either In-air or by weighted levers,lergencj brakeintermediate gear -haft as close to cne operating pinion a- con
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Keywords: ., bookcentury1900, bookdecade1920, bookidthestraussba, bookyear1920
