. Railway mechanical engineer . Fig. 1—Jacking Stall at Avis Shops. Show ing Jacking Bars and Power Operated Jack this class of work and with good success. To facilitate the stallation. In straightening the bent parts of cars, the jacksoperations performed with this appliance, N. B. Messimer, or blocks are placed against movable horizontal jack beams,superintendent of the Avis, Pa., shops of the New York Cen-. Fig. 2—A Badly Buckled Car as Received for Repairs Fig. 3—Car Shown In Fig. 2 After Being Straightened tral, devised an ingenious arrangement for using a power The side jack beams are ma
. Railway mechanical engineer . Fig. 1—Jacking Stall at Avis Shops. Show ing Jacking Bars and Power Operated Jack this class of work and with good success. To facilitate the stallation. In straightening the bent parts of cars, the jacksoperations performed with this appliance, N. B. Messimer, or blocks are placed against movable horizontal jack beams,superintendent of the Avis, Pa., shops of the New York Cen-. Fig. 2—A Badly Buckled Car as Received for Repairs Fig. 3—Car Shown In Fig. 2 After Being Straightened tral, devised an ingenious arrangement for using a power The side jack beams are made of two 8 in., lb. channels jack. riveted to spacing blocks, each of which has a 1J4 in. rod The jacking stall itself consists essentially of a structural extending between the vertical posts. By tightening the nuts steel framework of sufficient strength to withstand the extending between the vertical posts of the jacking frame. 31 32 RAILWAY MECHANICAL ENGINEER Vol. 95, No. 1 on these rods, the jack beams can be securely held in end jack beams are of similar design; but since the dis-tance between the center of the posts is greater, they aremade of 10 in., 30 lb. channels. Each jack beam is counter-balanced by two weights attached to wire ropes which passover sheaves keyed to a 1^4 hi. shaft mounted above the toptie beam as shown in Fig. 4. This facilitates raising orlowering
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
