. Electric railway journal . f his vehicle. David Curtins Safety Device At a later meeting of the committee appointed byMayor Curley to investigate practicable meansof increasing safety of operation at drawbridges,David Curtin, engineer of maintenance of way, BayState Street Railway, Boston, submitted drawings of asuggested flexible gate safety device as shown here-with. In brief, this device consists of a flexible gateconnected to a system of counterweights in such amanner that a runaway car striking the gates auto-matically brings into action the operation of the coun-terweights. Across the
. Electric railway journal . f his vehicle. David Curtins Safety Device At a later meeting of the committee appointed byMayor Curley to investigate practicable meansof increasing safety of operation at drawbridges,David Curtin, engineer of maintenance of way, BayState Street Railway, Boston, submitted drawings of asuggested flexible gate safety device as shown here-with. In brief, this device consists of a flexible gateconnected to a system of counterweights in such amanner that a runaway car striking the gates auto-matically brings into action the operation of the coun-terweights. Across the front of the gate, facing theapproaching car, steel cables are stretched, the spaceimmediately before the track being provided with aheavy wire or cable mesh to prevent climbing or shear-ing of the car body. The first shock of the impact willbe taken care of by the flexibility of the gate andcables. At each end of the gates a cable is carriedpast a suitable support to two or more counterweights 0 - i- „ J i [« 75 Proposed. curtins stop for safeguarding at drawbridge located on a track at the bottom of a chamber belowthe street surface. A series of heavy springs attachedto the cable ahead of the counterweight will furtherlessen the impact and retard the speed of the car,finally bringing the counterweight into action. Theweight of the counterpoise and the gradient of the in-cline determine the rate of retardation and consequent-ly the time and distance during which the car will bebrought to a stop. After the counterweights have runa short distance upon the track it is intended to dis-continue the latter and to allow the counterweights toslide forward and upward on two rails with narrowspacing laid in the center of the channel. A hydraulicplunger may be used in extreme cases, as in connec-tion with drawbridges at the foot of grades. Finding of the Commission The Massachusetts Public Service Commission is-sued a finding on Nov. 21 relative to the accident fol-lowing an exhaustiv
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