Showing posts with label CA&E History. Show all posts
Showing posts with label CA&E History. Show all posts

Thursday, April 7, 2022

More Than You Ever Wanted to Know About "Streamer Sash"

Many wooden interurban cars, and even some of the earlier steel cars, were adorned with graceful arched stained glass windows on the exterior, a design feature copied from steam road passenger cars of the time.  All of the wooden cars on the Chicago Aurora and Elgin had this feature when built, and that's what this article is about.  On the CA&E these exterior windows were called "streamer sash"; I don't know where this term came from.  But the streamer sash show up in pictures, and have been a favorite subject of CA&E fans ever since the preservation movement started.

The "shorties" as built (both Niles and Stephenson) had upper sash that appear to be one large pane of milk glass.  This lasted a relatively short time, and it's easy to see why.  Once the glass developed a crack, as could easily happen in regular service, the entire pane had to be replaced.






But in later years these were replaced by exterior upper sash with leaded windows with fairly small panes, in a regular pattern as seen below.  This design is much more robust, as has been demonstrated with interior leaded sash windows.  



And as it happens, we have pictures of both of the preserved short cars with leaded streamer sash:



Later orders of cars were built with the leaded streamer sash.  This is a picture of the 309 in the 30's, and as far as I can tell the car still had its as-built windows.


The Kuhlman cars had a distinctive pattern:




Here are some good pictures of Jewett cars with their original streamer sash:








However, the streamer sash were evidently a maintenance headache, and starting in the middle 30's all of the wooden cars were rebuilt, with the arched windows removed and replaced by wooden construction, of a few different designs.  All of the streamer sash were removed by about 1945, as nearly as we can tell.  (This doesn't apply to the ex-North Shore cars, but they were all scrapped by 1953.)

And as best as I can determine, all of the CA&E streamer sash windows were discarded; there are no original examples still in existence.  I would love to be proven wrong about this, but that is what the available evidence indicates.  Further information would be welcome.

(And as a side note, it is certain that all these windows were removed and replaced with wood, not just covered over as happened with the IT interurban cars, for instance, where they are still in place but covered by sheet-metal plates.  This obviously makes restoration of the CA&E cars a more difficult challenge.)

And therefore all of the preserved CA&E wooden cars were acquired by the various museums without their streamer sash, of course.


Now we get into the realm of controversy.  Most preservationists over the years seem to agree that removal of the arched windows was an esthetic disaster, and from the first, many have wanted to rebuild the preserved wood cars by reinstalling streamer sash. But with no original windows available, what do you do?

The most obvious solution was to acquire interior arched windows from the few cars that had them, at least those which were not being preserved.  And here we can start counting windows almost precisely.

Exactly 13 CA&E cars had interior stained glass windows, cars 309 to 321 inclusive.  These cars were from three different builders: two from Hicks, five from Kuhlman, six from Jewett.  And the interior stained glass windows in these cars were of three different designs.

Hicks interior window


Kuhlman interior window


Jewett interior window

Eight of these 13 cars went into preservation, all keeping their interior windows.  The other five (310 to 314) were scrapped at Wheaton.  B105 lists the 312 as being retired in 1959, so it probably was scrapped before 1962.  But it appears that all the rest had their interior upper sash removed by museum people first.

The 310's windows, a complete set, were acquired by IRM.  They were originally intended for installation in the 309 as exterior windows, but this never happened, of course.  After the fire two of them were used to replace ones in the 309 damaged in the fire, and the rest are still in storage.  Thus all of the Hicks interior windows are accounted for.

That leaves three Kuhlman cars.  A complete set of Kuhlman interior windows was acquired by Rockhill, with the intention of installing them on the 315 as exterior windows, and this has now been done.  Another set, more or less complete, was acquired by IRM, and some of these windows were probably acquired by individuals; about eight were still in storage by 1998.  We then traded four of them to Rockhill in exchange for third-rail beams.  (The four interior windows in the smoker of the 315 had been removed by the CA&E.)  Another complete set was evidently acquired by Fox River, and they are now planning to install these on the 316 as exteriors.  [Update: as of 2026, this has been done.]  And that accounts for all of the Kuhlman interior windows.

All six Jewett cars were selected for preservation.  The 316, 317, 319, and 320 still have all their interior windows intact.  The 321 was acquired to be scrapped for parts, and the interior windows were removed in 1962 and either sold or distributed amongst the members; a couple of these are now still in IRM's possession.  When the 318 was scrapped by IRM in 1979, all of its interior windows were acquired to enable the restoration of the 321, and they are now in storage.  So that accounts for everything except a few from the 321 that may still be floating around.

  

The problem with using interior windows on the outside is that all of the interior windows are a completely different design from the exterior streamer sash, although the Jewett interiors are somewhat closer than the other two.  This is easily seen from the pictures included in this article.  It changes the exterior appearance noticeably from what it was historically, and it's a matter of judgment, I suppose, how important that is to the people involved.


The only alternative is to have new streamer sash fabricated, using the available B&W photographs as a guide. This is expensive, but the results are much more historically accurate.  Mount Pleasant did this when the 320 was restored to its appearance during the 20's.  This particular aspect of the restoration was very well done, in my opinion.





So that's the current status, as far as we know.  As usual, comments and questions are welcome, but please, in view of the subject matter...

don't throw stones!!!

Wednesday, July 28, 2021

CA&E Headlight Circuit

The CA&E had its own system for portable headlights, which cannot be interchanged with anything else at IRM.  The main parts of the circuit on each car are the headlight switch and fuse in the electrical cabinet, the resistor box under the car, and a DPDT switch at each end in the ceiling above the motorman.  The headlight has two leads, connected across the bulb.  One plug is white and the other is black, and these go into two receptacles in the car, labeled B and D (for bright and dim).



You will observe that the direction of current is reversed when switching from bright to dim.  The reason for this has to do with arc headlights, explained below.  It makes no difference with incandescent bulbs, of course.

However, the headlights were later modified by adding a small resistor to the headlight, which grounds through the case.  This has the effect of making "dim" somewhat dimmer.  But this resistor can be removed or disconnected, so that the headlight does not ground through the case in either position, and so that it doesn't matter if the headlight leads are switched.  This change thus makes the system safer.  Some but not all of our available CA&E headlights have been thus modified.  In any case, as a general safety precaution all crews should be careful not to handle a headlight or even open the train door when the lamp is on.  On the North Shore cars this is especially important.

The DPDT switch is enclosed in a metal casting that looks like this:

In this picture the switch is in the center off position.  Inside the casting:

I believe most of the wood cars originally had the receptacles for the headlight plugs located one on either side of the train door, as seen here.  In our collection, the 308 and 309 are still this way.


But later, blocks with two receptacles were mounted to one side, and this is the way all of the steel cars are arranged.




In fact, we have a couple of spare blocks from Wheaton in our collection.



The main cause of system failure, other than a bulb burning out, is the failure of one or more resistors in the box under the car.

 
Typical Results for 600V Trolley Voltage


Dim

Bright

Voltage across bulb

60V

100V

Voltage across box

540V

500V

Current

2.7A

4.0A

Resistance across box

200Ω

125Ω

Resistance per tube

40Ω

42Ω

Power dissipated per tube

300W

650W

Power dissipated in bulb

160W

400W


Note: Five tubes in series when dim, three tubes when bright.

Of course, these values may vary depending upon the particular headlight bulb.



CARBON ARC HEADLIGHTS

Carbon arc lamps operate by starting a spark between two carbon electrodes.  The spark continues by allowing a current between the electrodes due to the generation of a hydrocarbon gas, which provides a very intense light.  The carbon arc lamp is generally a pretty rugged and reliable device, which does not require a vacuum tube, but it is more complicated, and the carbon electrodes are gradually consumed as the lamp operates.

When a carbon arc lamp is operated on DC, the positive carbon is consumed about twice as fast as the negative one, and a concave pit is developed in the end of the positive carbon, known as the crater.  The crater is very hot, and most of the light is generated by this crater.  For general illumination, the positive carbon would be placed directly above the gap, as shown below in Fig. 238.  But for a searchlight or headlight, the carbons would usually be placed at an angle, as shown in Fig. 239, to direct the light in the desired direction.  Of course, in a headlight the parabolic reflector is placed to focus the light also.  (Fig. 240 shows an AC arc lamp, which doesn't concern us here.)


When the headlight is switched to dim, the direction of the current is reversed, and this makes the upper carbon negative in Fig. 239.  The result is to make the rate at which the carbons are consumed more equal, and also to diffuse the light being generated somewhat.

The mechanism for a carbon arc lamp was rather complicated, but I will present a simplified explanation.  The upper carbon is held in a movable holder, which is adjusted by two solenoids acting in opposite directions.  There is a solenoid for lifting the carbon, wired in series with the arc, and a solenoid for pulling it down, wired in parallel with the arc.  These are known as the series solenoid and shunt solenoid, respectively.  There must also be a resistor in series with the lamp when it is operated from a constant-voltage source, such as on an electric car.  And the lamp has a dash pot, to slow the motion of the holder.


When the lamp is off, the upper carbon drops by gravity until it touches the lower carbon.  In this case, there is no resistance between the two elements, and when the lamp is turned on, maximum current flows through the series solenoid and through the carbons.  The series solenoid then starts to raise the upper carbon, starting the arc.  As the arc widens, the voltage across it increases, and this voltage is applied to the shunt solenoid.  The downward force exerted by the shunt solenoid therefore increases until the net force is zero, and the upper carbon remains in place, with a fixed voltage and current.  As the carbons are slowly eaten away, the arc widens, the voltage across it increases, and the solenoids automatically adjust the gap.  If the power is turned off, as may often happen on an electric car (especially if you have third-rail gaps), gravity once more causes the upper carbon to drop down, and the process repeats.

I can only imagine everybody was glad when incandescent headlight bulbs came along.

Reference: Practical Applied Electricity by Moreton, 1911

Monday, April 25, 2016

CA&E Slides from the Heinlein Collection

This is a collection of CA&E color slides taken by our old friend Bob Heinlein during the last days of operation, and some taken after abandonment.  Some of these have already appeared online via the Johnson website, but unless I'm missing something, most of them have not.  So rather than try to figure out which have or haven't, it was easiest to scan them all in and present them here.

The slides are arranged geographically from east to west, starting at Forest Park.  Every slide is carefully marked with the exact location and date it was taken.  As is common with old slides, some of them could benefit from color adjustment. I've tried to fix a few of them.  The images with captions are the unadjusted scans, with revised pictures to the right.

   Our heartfelt thanks to Bob for permission to post these pictures here.   Enjoy!

All images copyright Robert D. Heinlein
May not be reproduced or distributed without authorization


Sign - Forest Pk Terminal   Apr 21, 1957

405   Forest Park    Apr 22, 1957




429  Forest Park   May 18, 1957












422   5th Ave - Maywood    Apr 20, 1957











422    7th Ave - Maywood   Apr 27, 1957











427   8th Ave - Maywood   Jun 29, 1957

459   8th Ave - Maywood   Jun 29, 1957

430    9th Ave - Maywood    Jun 29, 1957

421     9th Ave - Maywood   Apr 20, 1957

422    9th Ave - Maywood    Jun 29, 1957

432    9th Ave - Maywood    Jun 29, 1957

400+402 --  410+453    9th Ave - Maywood    Mar 30, 1957












404   11th Ave - Maywood    Apr 20, 1957

401    11th Ave - Maywood    Jun 29, 1957

424    11th Ave - Maywood    Jun 29, 1957

407     11th Ave - Maywood    Jun 29, 1957

452     17th Ave - Maywood    Mar 30, 1957

453+410     Bellwood     Mar 30, 1957

417     Eastern Ave.  Bellwood     Oct 6, 1956

410     25th Ave - Bellwood    Jun 29, 1957


421     25th Ave - Bellwood    Jun 29, 1957

426     25th Ave - Bellwood    Jun 29, 1957

430     25th Ave - Bellwood    Jun 29, 1957

431     25th Ave - Bellwood    May 18, 1957

457     25th Ave - Bellwood    May 18, 1957

400    Bellwood Sta    Oct 6, 1956

401    Bellwood Sta    Oct 6, 1956

318     Roosevelt Rd.   (Mt. Carmel Cemetery)    Apr 27, 1957

318     Mannheim Rd.   (Mt. Carmel Branch)    Apr 27, 1957

427     W. of Mannheim         Mar 7, 1955   (Jim Heinlein)

403     W. of Mannheim         Mar 7, 1955   (Jim Heinlein)

433+417     Hillside - Garden Home    Mar 30, 1957

405     Spring Rd.    Apr 27, 1957

406+452     Glen Oak            Mar 30, 1957

416     Glen Oak         May 19, 1957

309+310     Glen Oak       May 19, 1957

600          Wheaton Shops     Apr 27, 1957

407     Wheaton     Jun 30, 1957

414     Wheaton      Apr 17, 1957

452      Wheaton Shops      Mar 30, 1957

451       Wheaton      Jun 30, 1957

309 - 454         Wheaton      Jun 30, 1957        

307 - 317       Wheaton      Apr 21, 1957

455-452-459        Wheaton       Jun 16, 1963

410     Wheaton      May 5, 1963

433     Wheaton      May 26, 1963

454     Wheaton      May 5, 1963

408     Wheaton      May 5, 1963

420     Wheaton      May 5, 1963

430 - 457      Wheaton      May 5, 1963

430 - 401       Wheaton      May 26, 1963

433     Wheaton      May 5, 1963

457     Wheaton      Jun 16, 1963

460        Weisbrook Rd.     Oct 26, 1958

460        Weisbrook Rd.     Oct 26, 1958

309     Warrenville      May 19, 1957

433      Williams Rd.       Mar 30, 1957

427      Williams Rd.       Mar 30, 1957

455    Batavia Jct.    Apr 17, 1957

405    Batavia Jct.    Apr 17, 1957

318      Glenwood Park    Apr 17, 1957

318      Glenwood Park    Apr 17, 1957

310      Glenwood Park    May 19, 1957

460        Aurora Ave.     Oct 26, 1958

460        Aurora Ave.     Oct 26, 1958

424      Aurora, Fox River       Apr 21, 1957

459      Aurora Station       Apr 21, 1957

460      Aurora Station       Apr 21, 1957

460        Aurora Station    Oct 26, 1958

460 Cab      Aurora Station    Oct 26, 1958

417       Wheaton - Liberty Drive      Mar 30, 1957

410       Wheaton - Liberty Drive      Mar 30, 1957

457       Wheaton - Wesley St.      Jun 30, 1957

4005-4006       Wheaton - Wesley St.      Jun 30, 1957

405     Geneva Jct.      May 19, 1957

454-456        Lakewood        May 19, 1957
430       Smith Rd.       Oct 26, 1958