US811115A

US811115A - Sliding door for railway-cars.

Info

Publication number: US811115A
Application number: US27168505A
Authority: US
Inventors: Fred D Ackerman
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-07-28
Filing date: 1905-07-28
Publication date: 1906-01-30
Anticipated expiration: 1923-01-30

Description

PATENTBDJAN. 80, 1906.

F. D. ACKERMAN.

SLIDING DOOR POR RAILWAY GARS.

APPLICATION YILBD JULYZS, 1905.

ttosmm) rrnn STATES PATENT OFFICE.

SLIDING DOOR FOR RAILWAY-CARS.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application iled July 28,1905. Serial No. 271,685.

To afl/f whom, 'it may carl/cern:

Be it known that I, FRED D. ACKERMAN, a citizen ofthe United States, residing at Hampton, in the county of Elizabeth City and State of Virginia, have invented. certain new and useful Improvements in Sliding Doors for Railway-(lars, of which the following is a s peciication.

My invention relates to sliding doors principally for railway-cars.

The object of 'my-invention is to provide means whereby'double sliding doors may be opened and closed together when either one is operated,

My invention will be more fully understood by having recourse to the drawings forming a part of this specification, in which- Figure 1 is an end view of the car, having its upper part removed, also the inside casing cut away, to show my invention in position. Fig. 2 is an end view of the upper portion. of the doors. Fig. 3 is an end view of the H- shaped track and the flanged rollers. Fig. 4 is a perspective view of the upper rack-bar. Fig. 5 is a perspective view of the lower rackbar.

In the drawings like reference-numerals indicate similar parts in all the views.

1 is the car-body, and v2 is an end of the same,upon which is placed the hereinafterdescribed mechanism.

3 and 3A are sliding doors which open from cach other, and when so open they are concealed behind the ceiled portion of the car` Woodwork. rIhe doors are adapted to open together when either 3 or 3A .is operated.

Upon the upper portion of the doors there are placed rack-

bars

4 and 5, having plate portions 6 and 6A, respectively, for fastening them to the doors in a suitable manner. These plates cause the rack-bars to have an IL-shaped form and are placed above the doors, as shown in Figs. 1 and 2.' The

plates

6 and 6 are placed above the doors at their centers, so that they may be properly balanced. The plate 6A is provided with an offset for permitting the rack-bar 4 to pass it, as shown. The rack-bars have also an angular or IL shape, as shown in Figs. 3 and 5, with the teeth arranged in a suitable manner upon one of the arms of the angle, and when the racks are in place upon the doors the teeth are oppositely disposed, as shown.

7 is a gear-wheel meshing with and operating both racks in opposite directions, so as to place the doors in the positions shown in Figs.

1 and 2, which is also indicated by the arrows at the upper portions of both figures.

The gear-wheel 7 rotates upon the shaft or axle 8, located upon the end woodwork of the car.

In order to prevent the gear-wheel 7 from getting out of mesh with the racks due to vibration, I provide rollers 9 and l0, which roll upon the toothless portions of the rackbars and are fastened, together with the gear- Wheel 7, to the base-plate or support 10A.

`To properly hang the doors and to eliminate friction, I also provide rollers 11, having deep double iianges 12 thereon, two of which are usually placed. near each end of the upper portion of' the doors one above the other at such a distance apart so as to enable them to receive the double-flanged or H-shaped track or hanger 1.3 between them, as shown in Fig. 4.

The rack-bar 4 acts, as shown in Fig. 3, so as to prevent the gear-wheel or pinion 7 from becoming disconnected from the rack by the plain edge bearing against the pinion should the rollers 11 become inoperative or leave their track.

The rollers 11 are supported upon shafts or axles 14. Also the rollers 9 and 10 have similar axles, (denoted by 15,) which are fixed in the base-plate 10".

By my invention I am enabled to provide means whereby the hanging or disarrangement of car-doors is prevented, as the mechanism is such that the parts work easily and are not liable to get out of order.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1su

1. In a device of the class described, the combination with double sliding doors, of plates fastened at the middle upper portion of said doors and having rack-bars of an L-shape cross-section and disposed at right angles to said plates, and rotary means for reciprocating said racks.

2. In a device of the class described, the combination with double sliding doors, Aof lates or webs secured to the doors of less width than the saine and disposed at the center thereof, said plates or webs having rackbars of L shape in cross-section and at right angles to the plates or webs, a gear-wheel between the racks adapted to reciprocate the same to open and close the doors together, rollers on one side of the doors, and independent H-shaped tracks for the rollers, one for each of the said doors.

3. In a device of the class described, the Combination With double sliding doors, of a plate or Web secured to the top of each door near its center, a raok-barioneaoh plate at right angles thereto extending above and beyond the said doors,a pinion between the racks for opening and Closing one door by the other, one of the said rack-bars extending upon each side of the pinion, rollers on the plain surface of the racks for preventing vertical movement thereof, flanged rollers on each side of the doors, and tracks or guide-,rails having an H shape in eross-seotion Jfor supporting said rollers.

In testimony whereof I have hereunto af- I5 fixed my signature, in the presence of tWo Witnesses, this 19th day of July, 1905.

FRED D. ACKERMAN.

Witnesses:

R. L. J. GAYLORD, WALTER B. BURROW.