US858920A - Car-door mechanism. - Google Patents

Description

yPATENTE)JULYzg 1907. J. F. sTREIB. GAR nooR MEGHANISM.

APPLICATION FILED MAB.. 6, 1905.

2 SHEETS-SHEET 2.

INVEI'ITOR frm v Allegheny county,

JOHN F. STREIB, OF AVALON, PENNSYLVANIA, SSIGNOR lTO PREssED STEEL CAR COMPANY,

OF PITTSBURG, PENNSYLYN1A,A CORPORATION OFNEWJERSEY.

lGAR-noon MEoHANIsM.

To all 'whom it may cancer'n f f Be it known that I, JOHN F. STREIB, of Avalon, Pennsylvania, have invented a n ew and useful Car-Door Mechanism, of which the fol,n lowing is a-full, clear7 and exact description, reference being had to the accompanyingrdrawings, forming -part of this specification, 'in which- Figure l is a plan View of a part of the bottom of' a car showing my improved door operating mechanism;

Fig. 2 is a vertical section on the line II-II of Fig. l; Fig. 3 is a vertical longitudinal section on the line II-III of Fig. 1; Fig. 4 is an end elevation of the car showing the operating lever; and Fig. 5 is a side elevation. A

In the drawings 2 represents the center sill of the car, 3 is one of the side sills, and 4 is a door which is hinged to the car at 5 and is adapted to swingfroln the closed position' shown in full lines on Fig. 2 to the open position which is showjn indotted lines.

I The operating mechanism comprisesshafts 6 which extend lengthwise of the car below the doors. Each shaft extends under the doors from one end of the car to the other on one side of the center sill. are provided at intermediate points with rollers 7, 8, of which the rollers 7 travel upon tracks 9 secured to plates 10 which depend from the bottom of the cal'.v

The tracks are inclined upwardly and outwardly from the center sill, and the plates 10 are slotted as shown at 12 to receive the shaft and permit its movement. The rollers 8 are grooved peripherally and Contact with bars 11 on the doors. Each shaft 6 is connected with the side sill or other part of the car-framing by a suitable 'numberof chains 14 which when the shaft is in itsoutermost position arewrapped up thereon, but as the shaft is rolledV towards the center sill it uncoils the chains from it\ and the lchains therefore preserve the shaft in parallel position. -1

The shaft 6 .is moved preferably by a lever 15 which is journaled loosely at the end of the shaft as shown in Fig. 4, and engages a.v ratchet 16 on the shaft. The lever vis provided with a pawl 17, so that by operating the lever, a step by step motion is' imparted to the shaft causing it to roll from one end of the tracks 9 to the other. i i

Fig. 2 shows by 'full lines the door in its closed position. The shaft is then near the side sill and the chains 14 are wrapped around it. The door then rests upon the rollers Sand is held thereby in its highest and A' closed position; the shaft is held by the lever 15 which is confined by a. sitable locking device 18 and the rollers themselves are rendered stable in their position by forming the track with d pressions 9 in which the` Specication of Letterslatent. Application filed March 6, 1905. Serial No. 248,491.

These shafts Patented .my 2,1907'.

rollers then rest. To open the door, the lever 15 is released from its lockedposition, the pawl detached.V from Vthe ratchet and the shaft caused to travel down the inclined track, during which travel the door resting on the rollers opens into the position shown by dotted lines, the chains unwinding as the shaft descends and holding the shaft and rollers parallel.` To close the door the operator by means of the lever and ratchet causes the shaft to Ftravel up the tracks, winding the chains upon it'until finally it is brought into closed position.

The lmeclianism is very simple in its construction, it is easy to operate and it holds the door with great security. The mechanism being simple it is not apt to get out of order with the rough usage to vwhich it is subjected during the operation of the car.

It will be noted that the chains and rollers are at all times covered by the 4portions of the floor over the` slotted diaphragme. They are therefore o ut of theway ot' the descending material when the 5 doors are open.

Within the scope of my invention as defined in the claims, the parts may be modified in many ways since WhatIclairn is:

1. In car door operating mechanism. a bottom door hinged at one edge; tracks supported, below the door and inclined upwnrdlyand outwardly fromthe car center sill. a rolling shaft mounted 1o travel on said tracks in Contact with tlie underside of the door, and guiding chains for said shaft all of which are attached thereto at one end and to a xed portion ot the cnr at their opposite ends; substan` tially as described.

2. In cnr door operating mechanism, a bottom door hinged atfits inner edge, tracks. supported below the door and inclined upwardly andoutwardly from the longitudinal center of the car, a rolling shaft mounted to travel on Saidtracks and having rollers upon which the door rests, ratchet and pnwl ineens for actuating the shaft, and guiding chains all of which are attachedto snid shaft nt one end and to the car at the opposite end, and adapted to wind upon and unwind from the shaft; substantially as described.

3. The combination with u downwardly and inwardly opening bottom door, having transverse bearing portions at its under side, of guide-ways or tracks supported below the car door and'inclined upwardly and outwardly from a rolling shaft having.; rollers which tracks, and other rollers which engage the transverse bearing members on the door, and guiding chains for said shaft, each of which are attached by one of its ends to the rolling shaft and by its opposite end to a fixed portion of the car; substantially ns described.

In testimony whereof, I have hereunto set niy hand.

JOHN F. sTREiB.

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