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| Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) (1273821) | |
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| (1273821) | |
Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoPCCLCars on Thu Feb 6 12:21:14 2014 Chicago's 2013-14 winter record has been a test for the sleet/ice/snow mechanisms, including the sleet scrapers on the trucks and the antifreeze solution (paste) applied to the third rail. All CTA cars have 8 manually operated sleet devices on each two pairs of cars. These devices can be operated by the operator or by yard personnel at terminals. One or two trains on a line would apply antifreeze.The CTA of course operates an open third rail.... traces back to the 1892 World's Fair Columbian Exposition. The gravity trolley pickups were first used in England. The devices would not work if a covered third rail is used. The sleet scraper devices are mounted on the ends of the trolley blocks, raised or lowered by inserting a wooden handle. The sleet scrapers are electrically connected in the 600 v. circuit.  
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| (1273828) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by Joe V on Thu Feb 6 12:37:54 2014, in response to Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoPCCLCars on Thu Feb 6 12:21:14 2014. Are those gravity shoes anything like the BRT once had ? |
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| (1273841) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by Jackson Park B Train on Thu Feb 6 14:05:10 2014, in response to Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoPCCLCars on Thu Feb 6 12:21:14 2014. thanks for the nice details. |
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| (1273844) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by MainR3664 on Thu Feb 6 14:24:20 2014, in response to Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoPCCLCars on Thu Feb 6 12:21:14 2014. Very interesting- thanks!!! |
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| (1273978) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by WillD on Fri Feb 7 02:06:10 2014, in response to Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoPCCLCars on Thu Feb 6 12:21:14 2014. Where would the antifreeze solution be dispensed within that truck assembly? Or are only certain cars equipped to dispense antifreeze? I have to say I was kind of surprised to see that the CTA ropes off the front of cars operating in revenue service and puts the antifreeze containers and presumably pumps there. I'm not sure I see the advantage of that over a dedicated ice train. |
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| (1273999) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoPCCLCars on Fri Feb 7 05:29:52 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by WillD on Fri Feb 7 02:06:10 2014. CTA's video shows the antifreeze solution dripping through/beneath the trolley shoe. I have no idea how they guarantee the 600 v. protection. |
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| (1274025) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoMotorman on Fri Feb 7 09:21:32 2014, in response to Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoPCCLCars on Thu Feb 6 12:21:14 2014. Chicago and Bosto are the only properties, at least in North America that have exposed 3rd rail. As someone who worked for 26 years, and have visited a good majority of the transit companies in the United States and Canada,it is dangerous, and has costed many people their lives, there is no reason at all why Chicago's 3rd rail cannot be covered as well. |
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| (1274029) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by Joe V on Fri Feb 7 09:52:48 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoMotorman on Fri Feb 7 09:21:32 2014. Can you with those huge gravity shoes, or go to paddles like the 2200's had ? |
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| (1274168) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoMotorman on Fri Feb 7 16:04:47 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by Joe V on Fri Feb 7 09:52:48 2014. The 2200s type trolley shoe. |
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| (1274191) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by Joe V on Fri Feb 7 16:47:12 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoMotorman on Fri Feb 7 16:04:47 2014. I wonder how your 3rd rail differs from what the BRT had 100 years ago. |
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| (1274425) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoPCCLCars on Sat Feb 8 15:36:17 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by Joe V on Fri Feb 7 16:47:12 2014. "I wonder how your 3rd rail differs from what the BRT had 100 years ago."Joe....your question wasn't answered twice.....no expretise???? |
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| (1274442) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoPCCLCars on Sat Feb 8 16:42:15 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by Joe V on Fri Feb 7 09:52:48 2014. There is this photo by Joe Testagrose from 1969 showing a CTA2200 testing showing a trolley third rail mechanism needed under a covering. I noted that Chicago could have changed "L"/subway in 1939 by using the larger dimensions planned for the Initial Subway System.....but they chose to continue with the same 8'-8" base floor. Also continued was the third rail dimension. The trolley block mechanism was used in almost all car series.....4000, 5000, 6000, 6131, 6511, 1-50, 2000, 2404, 2600, 3200, 5000(2009), 7000. The only exceptions are the two series...6201 and 2200 where the truck designs incorporated a paddle shoe and not the gravity shoe. |
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| (1274466) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by Joe V on Sat Feb 8 18:37:00 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by ChicagoPCCLCars on Sat Feb 8 15:36:17 2014. I don't understand what you are saying. |
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| (1274483) | |
Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos) |
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Posted by ChicagoPCCLCars on Sat Feb 8 19:43:29 2014, in response to Re: Chicago CTA 'L' Sleet/Ice/Snow Mechanisms (Photos), posted by Joe V on Sat Feb 8 18:37:00 2014. We didn't get an answer..... the knows the answer? I want to know the answer too. |
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