Banner Box Signals
Tilting Target Signals
These pages covers signals that have
(mostly) gone the way of the steam engine. Pretty soon, we will be able to
add B&O CPL and Pennsy PL signals to this page at the rate they are being replaced by color
This page covers signals known as Banjo Signals.
Thomas Seavy Hall invented the Banjo signal in 1869, two years before forming the Hall Signal Company. It is given that name because of it's appearance, and how it resembles the bottom of an inverted banjo. The invention of the Banjo signal predates that of the semaphore by about ten years.
US&S made a similar signal, usually referred to as a Banner signal.... I will have to see if I can come up with a non-copyrighted picture of one, Brian Solomon has a picture of one on the B&M in his book.
Banjo signals work by an actuating mechanism pulling a hoop covered with a colored piece of fabric (commonly silk), in front of an opening so the engineer could see it by day, and some of them had a much smaller window at the top which was illuminated for night time operation - the color was the same as the main indication. As far as I can tell from the resources I have come across, Banjo signals were two aspect.
Banjo signals were failsafe, and operated magnetically. The clear banner would be pulled into view by an electromagnet, and when de-energized, would allow the clear disc to fall out of sight by gravity. The two "lenses" were attached to the same arm so they would move together - the arm also (usually) had a counterweight. Since the larger one was heavier, the pivot point was placed so it would let gravity act on it, pulling both discs out of sight. According to Solomon, two magnets were used, one to move the lens into position, and another to hold it in place (similar to the operation of a semaphore, where a lesser current was used to maintain the semaphore in position once pulled into place using a larger current). Thanks to John Ingham of the U.K. for correcting my oversight on Banjo signals not being failsafe.
Because Banjo signals were only two aspect, they were usually used in pairs on the mainline, one used as a home signal and the other a distant, or approach signal. If the next signal was showing a red (we call it stop, but back then it was called a danger signal), the distant signal would display a blue, which was common in those days for that aspect. The picture below from the Reading has obviously been updated to show the "newer" colors. Also remember that back in the very early days of railroading, a clear signal was usually indicated by white, and not green.
There are few remaining examples of this signal type around. Julie Johnson of the Illinois Railway Museum estimates that there are around a dozen or so of these signals left in existence, the majority of which are in museum collections. I am aware of banjo signals at the IRM in Union IL, Orange Empire in Perris CA, and the Railroad Museum of PA, in Strasburg. The first picture set below is from one of the few known signals that is in private hands.
One source of info used above is from Brian Solomon's book (2003) Railroad Signaling, and is easily found almost everywhere.
The pictures above are of a banjo signal that recently sold on EBay for $15,000, the auction ended on Sep 14th, 2007. Altho the listing stated that the date on the signal was 1843, the signal was probably from much later. Looking at the photo below, you can easily see how the mounting bracket was attached to the mast and used to support the signal.
This photo, by Donald Wise, was taken in Reading PA, sometime in the early 40's (I believe)....ah, the good ole days! This is one of the very few pictures I have come across on the internet and was well "hidden" (it took a lot to come across it :-).
Another photo I came across on the internet, not sure where, but it shows a banjo installation on the CNW in Iowa.
Notice the semaphore also in use, possibly in conjunction with the banjo signal?
Left: Picture from an early US&S catalog.
On the right, a picture of a Banjo signal sold by Wiederseim Auctions, the projected price was $7000-9000, but sold for $15K....
It seems as if most of the pictures floating around of Banjo signals come off the Reading RR for some reason.
These two are no exception, and we thank Zak for finding them and posting them on the web.....
Many, many more pictures of his can be found here
I love trains, and I love signals. I am not an expert. My webpages reflect what I find on the topic of the page. This is something I have fun with while trying to help others.
Please Note: Since the main focus of my two websites is railroad signals, the railfan guides are oriented towards the signal fan being able to locate them. For those of you into the modeling aspect of our hobby, my indexa page has a list of almost everything railroad oriented I can think of to provide you with at least a few pictures to help you detail your pike.
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Aerial shots were taken from either Google or Bing Maps as noted. Screen captures are made with Snagit, a Techsmith product... a great tool if you have never used it!
By the way, floobydust is a term I picked up 30-40 years ago from a National Semiconductor data book, and means miscellaneous and/or other stuff.
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Last Modified On: 01-Jan-2021