The next wheel may have an axle worn little or none. (See Fig. 28)

Now, if these brasses are exchanged, we have the conditions as shown

in Figs. 29 and 30, and we must expect they will heat. The remedy was

simply to keep each brass upon its own journal. To do this the brasses

were fastened to the axle by a piece of small wire, and went with it

to the lathe and press. When its truck was reached, the brass was

there with its journal. Worn-out brasses, of course, could not be put

in, and new ones were substituted. The little trouble from that source

that followed the change showed the efficacy of the remedy.

[Illustration: FIG. 29 and FIG. 30]

The manner in which the tires of engines were to be changed, when the

final day came, was a serious question. The old-fashioned fire upon

the ground could not be thought of. The M. & O. had used a fire of

pine under the wheel, which was covered by a box of sheet iron, so

arranged that the flame and heat would be conveyed around the tire,

and out at an aperture at the top. (Fig. 31.) Many thought this

perfect, while others were not satisfied, and began experiments for

something better. A device for using gas had been patented, but it was

somewhat complicated, as well as expensive, and did not meet with

general favor. A very simple device was soon hit upon. A two inch pipe

was bent around in a circle a little larger than the outer rim of the

wheel. Holes 1/10 in. in diameter and 3 or 4 in. apart were drilled

through the pipe on the inside of the circle. To this pipe was

fastened another with a branch or fork upon it. To one branch or fork

was connected a gas pipe from the meter, while to the other was

connected a pipe from an air pump. With the ordinary pressure of city

gas upon this pipe it was found that the air pump must keep an air

pressure of 40 pounds, that the air and gas might mix properly at the

branch or fork, so we could get the best combustion and most heat from

our "blowpipe," for such it was. (Fig. 32.)

[Illustration: FIG. 31 and FIG. 32]

We were able to heat a tire so it could be moved in ten to twenty

minutes, and the machine may be said to have been satisfactory.

Gas, however, was not to be had at all places where it would be

necessary to change tires, and the item of cost was considerable.

To reach a result as good, if possible, experiments were begun with

coal oil (headlight oil). They were crude and unsatisfactory at first,

but soon success was reached.

A pipe was bent to fit the lower half of a wheel pretty closely and

then turned back under itself about the diameter of the pipe distant

from it. This under part had holes 1/10 in. diameter and 3 or 4 in.

apart drilled upon its upper side or under the upper pipe. Connected

with the upper pipe at its center was a pipe which ran to one side and

up to the can containing the kerosene. Between the can and the pipe

under the wheel was a stop cock, by which the flow of oil could be

controlled.

[Illustration: FIG. 33]

To use the device, open the cock and let a small amount of oil flow;

apply fire to the pipe under the wheel, and the oil in the upper pipe

is converted into gas, which flows out of the small holes in the lower

pipe, takes fire, and heats not only the tire, but the upper pipe,

thus converting more oil into gas. We had here a lot of blue flame

jets and the same result as with gas, but at less cost. We had also a

machine that was inexpensive and easily handled anywhere. Boxes were

placed over the upper parts of the wheels, that the heat might pass

closely to the tire. This device was extensively used by our people,

and with great satisfaction. In one way care had to be taken, viz.:

That in starting the fire it did not smoke and cover the tire with

carbon or "lampblack," which is a non-conductor of heat.

Experiments were made with air forced through gasoline, and with oil

heated in a can to form gas. There was more danger in either of these

than with our blowpipe device, and no better results were obtained,

though the cost was greater.

With the change of the wheels, the brakes had to be changed the same

amount, that is, each one set in 1½ in. This it was thought would

either require new hangers or a change in the head or shoe in some

way. We found that the hangers could easily be bent without removal.

Fig. 34 shows three hangers after passing through the bending process.

A short lever arranged to clasp the hanger just below the point, A,

was the instrument; a forked "shore" is now placed, with the fork,

against the point, A, and the other end against the car sill; press

down on the lever and you bend the hanger at A; lower the lever to a

point just below B, reverse the process, and you have the bend at B;

the whole thing taking less than two minutes per hanger. A new bolt

hole, of course, has been bored in the brake beam 1½ in. inside the

old hole. It takes but a short time after this to change the position

of the head and shoe.

[Illustration: FIG. 34]

Before the day of change, a portion of the spikes were drawn from the

inside of the rail to be moved, and spike set 3 in. inside of the

rail. As a rule two spikes were drawn and the third left. At least

every third spike was set for the new gauge, and in some cases every

other one.

There were several devices with which to set the spike. A small piece

of iron 3 in. wide was common, and answered the purpose well. This had

a handle, sometimes small, just large enough for the hand to clasp,

while others had a handle long enough for a man to use it without

stooping down. (See Figs. 35 and 36.) Another device is shown in Fig.

37, so arranged that the measurements were made from the head of the

other rail. This was liked best, and, it is thought, gave the best

results, as the moved rail was more likely to be in good line than

when the measurements were taken from the flange.

[Illustration: FIG. 35, FIG. 36 and FIG. 37]

It was intended that great care should be taken in driving the spikes,

that they were in the proper place, square with the rail, and left

sticking up about an inch.

The ties, of course, were all adzed down before the day of change.

"Handspikes" were originally used to throw the rails, as were lining

bars.

We found, however, that small "cant hooks" were more easily handled

and did better work. The first were made like Fig. 38, with a spike in

the end of a stick, while the hook was fastened with a bolt about 10

or 12 inches above the foot.

[Illustration: FIG. 38 and FIG. 39]

We afterward made them of a 1¼ in. rod, 3½ ft. long, pointed at one

end, with a ring shrunk on 1 ft. from the bottom. Then the hook was

made with an eye, as shown in Fig. 39, which slipped down over the top

of the main rod. This was simple and cheap, and the iron was to be

used for repair purposes when this work was done.

Upon the system with which the writer was connected we had some

branches where we could experiment upon the moving of the rail.

Between Selma and Lauderdale the traffic was light, and at Lauderdale

it connected with the Mobile & Ohio Railroad, which was narrow, and to

which all freight had to be transferred, either by hoisting the cars

or by handling through the house. By changing our gauge we would

simply change the point of transfer to Selma. Here was a chance to

experiment upon one hundred miles and cause little trouble to traffic.

We could see the practical workings of our plans, and, at the same

time, leave less to do on the final day. Upon the 20th of April we did

this work. It had been our plan to do it somewhat earlier, but floods

prevented.

Most of the rail was old chair iron, short, and consequently more time

was used in making the change than would have been required had our

work been on fishplate rail. Our sections here were about eight miles

long, and we arranged our men on the basis blocked out by the

committee, viz., 24 to 26 men to the section, consisting of 6 spike

pullers, 4 throwing rails, 12 spikers, 2 to push the cars and carry

water.

We soon found 5 ft. cars useless, and threw them into the ditch to be

picked up at some future time.

The men were spread out so as not to be in each other's way, and when

the organization was understood and conformed to, it worked well. One

gang changed 5 miles in 5 hours and 10 minutes, including a number of

switches. We found, however, and it was demonstrated still more

strongly on later work, that after 5 or 6 miles the men began to lag.

We believed we had the best results when we had sections of about that

length.

It was arranged that two sections, alternately, commenced work

together at one point, working from each other and continuing until

the force of another section was met, working from the opposite

direction.

The foreman in charge was expected to examine the work and know that

all was right. The push car which followed was a good test as to

gauge.

A work train was started from each end with a small force (20 or 25

men) to run over the changed track. This train, of course, had been

changed on a previous day to be ready for this work.

If a force was overtaken by this train with its work not done, the men

on the train were at once spread out to aid in its completion. This

done, the train ran on.

Not until this was done was a traffic train allowed to pass over the

track. The same rule was followed upon all the work.

Upon the final day it was required that upon all high trestles and in

tunnels the track should be full-spiked before being left or a train

let over. This took extra time and labor, and possibly was not

necessary; but it was a precaution on the side of safety.

Upon the day of the change of the Alabama Central Division (Selma to

Lauderdale), superintendents of other divisions, with their road

masters, supervisors, master mechanics and many section foremen, were

sent over to see the organization and work and the preparations that

had been made. Many of them lent a helping hand in the work. They saw

here in practice what had only been theory before.

About a week before the general change that portion of the road

between Rome, Ga., and Selma, Ala., about 200 miles, was changed, and

again men from other divisions were sent to see and aid in the work.

So when the final day came, the largest possible number of men were

able to work understandingly.

On the last day of May the Memphis & Charleston, Knoxville & Ohio, and

North Carolina branch were changed, and on June 1 the line from

Bristol to Chattanooga and Brunswick.

Other roads changed their branch lines a day or two before the 1st of

June; but the main lines, as a rule, were changed on that day.

It was a small matter to take care of the cars and arrange the train

service so there should be no hitches. It was not expected that

connections would move freight during the 48 hours prior to the

change, and these days were spent in clearing the road of everything,

and taking the cars to the points of rendezvous. All scheduled freight

trains were abandoned on the day prior to the change, and only trains

run _to_ such points.

Upon the East Tennessee system these points were Knoxville, Rome,

Atlanta, Macon, Huntsville, and Memphis, and to these points all cars

must go, loaded or empty, and there they were parked upon the tracks

prepared for the purpose. Passenger trains were run to points where it

had been arranged to change them, generally to the general changing

point.

Most of the Southern roads have double daily passenger service. Upon

all roads one of these trains, upon the day of change, was abandoned,

and upon some all. Some, even, did not run till next day.

We were able to start the day trains out by 10 or 11 o'clock A.M., and

put them through in fair time. Of course, no freights were run that

day, and the next day was used in getting the cars which had been

changed out of the parks and into line. So our freight traffic over

the entire South was suspended practically three days.

The work of changing was to commence at 3:30 A.M., but many of the men

were in position at an earlier hour, and did commence work as soon as

the last train was over, or an hour or so before the fixed time.

Half-past three A.M., however, can be set down as the general hour of

commencement.

For five or six hours in the cool morning the work went on briskly,

the men working with much more than ordinary enthusiasm. But the day

was warm, and after 9 or 10 A.M. it began to lag. All was done,

however, before the day was over, and safe, so that trains could pass

at full speed.

The men all received $1.50 for the work, whether it was finished early

or late in the day, and were paid that afternoon as soon as the work

was done. Tickets were given the men, which the nearest agent paid,

remitting as cash to the treasurer.

On some lines it was deemed best to offer prizes to those who got

through first.

Reports showed some very early finishes. But the facts seem to have

been that under such encouragement the men were apt to pull _too many_

spikes before the change and put _too few_ in while changing. They

were thus reported through early, but their work was not done, and

they took great chances.

It was by most considered unwise to offer such prizes, preferring to

have a little more time taken and be sure that all was safe. Such

lines seemed to get their trains in motion with as much promptness as

others. This, with freedom from accident, was the end sought.

It was found after the work had been done that there had been little

inaccuracies in driving the gauge spike, to which the rail was thrown,

probably from various causes. The rail to be moved may not always have

been exactly in its proper place, and then the template in the hurry

may not have been accurately placed, or the spike may have turned or

twisted.

Whatever was the cause, it was found that frequently the line on the

moved side was not perfect, and, of course, many spikes had to be

drawn and the rail lined up and respiked. The more careful the work

had been done, the less of this there was to do afterward. With rough

track this was least seen. The nearer perfect, the more noticeable it

was.

Of course, we all planned to get foreign cars home and have ours sent

to us. But when the interchange stopped, we found we had many foreign

cars, which, of course, had to be changed. This subject had come up in

convention and it had been voted to charge three dollars per car when

axles did not need turning, and five dollars where they did. By

comparison with the cost of changing, as shown in this paper, it will

be seen that to our company, at least, there was no loss at these

figures.

The following tables will explain the work done upon the Louisville &

Nashville and East Tennessee, Virginia & Georgia systems.

It is to be regretted that the writer has not at hand information

regarding other roads, that fuller statements and comparisons might be

made and the showings be of greater value.

The figures of the Mobile & Ohio are added, having been compiled from

the annual report of that road.

MOBILE & OHIO RAILROAD.

(_Compiled from Annual Report._)

________________________________________________________________________

| | | | | |

| Number | Cost of | Cost of | Total |Average|

|Changed.| Labor. | Material | Cost. | Cost. |

|________|__________|__________|__________|_______|

| | | | | |

Engines and tenders. | 47 |$ 8,031.42|$ 7,276.86|$15,308.28|$325.70|

Pass., bag., ex. cars.| 55 | 439.37| 104.25| 542.62| 9.87|

Freight cars, 1,361. }|1,468½ | 5,719.03| 739.57| 6,458.60| 4.40|

Freight trucks, 107½.}| | | | | |

Lever and push cars. | 143 | 1,427.55| 476.93| 1,904.48| 13.32|

| | | | | |

| Miles. | | | | |

Track (inc. sidings). | 583.5 | 17,109.53| 7,275.14| 24,384.87| 41.79|

Bridges. | 583.5 | 1,896.60| 190.00| 2,086.60| 3.58|

Track tools. | 583.5 | 170.72| 1,405.74| 1,576.46| 2.70|

Shop tools. | 583.5 | 419.70| 2,982.90| 3,402.60| 5.83|

Temp. side tracks. | 12.09| 1,958.94| 372.37| 2,331.31| 192.83|

Switching cars. | | 1,398.18| 16.50| 1,414.68| |

Car hoists. | | 2,499.38| 4,419.34| 6,918.72| |

|________|__________|__________|__________|_______|

| | | | | |

Total cost. | |$41,069.42|$25,259.60|$66,329.02| |

Total average cost | | | | | |

per mile. | | | | |$113.68|

______________________|________|__________|__________|__________|_______|

LOUISVILLE & NASHVILLE RAILROAD.

(_Compiled from Annual Report._)

Miles of track--Main line 1,893.7

--Side track 196.3

------- 2,090.0

Cost

Track. Total. per Mile.

Section labor--Before day of change $28,106.60

--On day of change 20,090.42

--After day of change 19,713.19

---------- $67,910.21 $32.49

Carpenter labor 3,799.19 1.82

Spikes 20,873.70 9.99

Switches 6,331.85 3.03

Tools 2,749.50 1.31

Hand cars and sundries 5,691.39 2.72

----------- ------

Total $107,855.84 $51.36

_Equipment._

Average

Number. Total. Cost.

Locomotives 264 $53,480.98 $202.58

Cars (300 of these passenger--3.5%) 8,537 49,577.20 5.81

----------- --------

Total cost $210,414.02

Total average cost per mile $100.67

Scientific American Supplement, No. 623, December 10, 1887 · 第 9 / 34 题