From the far, far reaches of the wild, wild west I am: rtpoteet
Did you google it?
"midlin track" tirns up a number of results. Here's one:
www.nmra.org/alltime.html
Craig
DMW
Howdy, Jay,
Midlin roadbed was similar to Tru-Scale roadbed, but had slots milled in at the factory to accept the special Midlin rail. It wasn't really compatible with anyone else's standard T rail, but did have one unique feature.
If installed right side up, the cruciform Midlin rail had a standard HO code 100 profile, and a leg down into the slot that secured it without spikes. It could be installed upside down, and would then yield a code 70 profile for old-time or secondary trackage. Because there were no spikes, even the pre-RP25 HO flanges could run on it without interference.
IMHO, the non-compatability led to Midlin's demise. You couldn't simply slip on a standard rail joiner and connect it to anything end-to-end. In fact, I don't know how it was joined even to itself. I could see that being a problem.
Chuck (modeling Central Japan in September, 1964)
Midlin Models highlights from Model Railroader:
July 1938: Trade Topics "New Kind of HO Track", Ad :Self Assembled HO Track"
November 1938: Ad "Assembled Trestle"
December 1938: Ad "Finished Track"
February 1939: Ad "HO Finished Turnouts"
April 1939: Ad "Self Assembled OO Gauge Track"
June 1939: Ad "Assembled OO Switches"
November 1939: Ad "Crossing"
April 1940: Ad "Manual Switch Control same principle as car choke"
August 1940: AD HO and OO Assembled Crossover"
February 1942: AD Production Curtailment" - Production reduced due to war but small quantities still made for direct sale to customers. See dealer first.
April 1942: Ad last ad until
January 1945: Ad No-essential industry. Waiting for OK to resume production
April 12946: Ad "Make Tracks For Midlin"
November 1946: Ad "Back to Normal In Full Production"
December 1946: Ad "seasons Greetings" Photo of staff - 19 people
July 1947: ad "Ellis Type Bumpers"
August 1947: Ad "Wye Switch"
October 1947: Ad 'Lighted Signals"
April 1949: "S Gauge"
September 1946" Ad "order by Mail"
December 1948: Ad "Plastic Switch Frog, Universal Assembled Switch Points"
March 1949: Ad "Assembled Scissors Crossover", Crossings 30 45 60 90
July 1949 Trade Topics: Review of crossings and double crossover
January 1950: Ad "New System" Roadbed and ties one piece made from cork"
March 1951: Article "How To Use Midlin Track" with ad
January 1952: Last Midlin Ad
April 1952: Trade Topics Review od 15 degree crossing
March 1959: Off the Train Wire Facilities of Midlin sold to Gnome Models
June 1959" Gnome Models ad "Track, Switches, Crossing Formerly Made By Midlin Models
August 1959: Gnome Models ad
September 1991: Reminiscing With Howell Day
I tried to sell my two cents worth, but no one would give me a plug nickel for it.
I don't have a leg to stand on.