For those who don't know: selective collective= a modern elevator. A computer knows which way the elevator is going and will respond to all cab and floor calls in the direction it's going. Collective=a rare elevator... It doesn't care which direction it's going. You hit one button and it will either come to your floor or answer a cab call first. Regardless of which way it's going. It's kind of randomized. Those elevators were pains in the butts and are epically rare now a days. This elevator will respond to 1 call and cancel any other calls until the first call is complete.
At the university I graduated from (University of Nebraska at Omaha), we had two elevators with collective. One was a 4-story (busy building) unit. It would accept calls, but you could not tell it whether you wanted up or down. It even had Fire Service Phase I and II! And it was small too. Put the control system and the size and it was very inefficient. It was replaced by a larger TK hydro. Another one was a 2-story hydraulic. On this one you could reverse direction mid-flight! It was torn out and now dry wall and a large picture are in it's place!
Theres a really old elevator in Paducah KY at the century building. It has big buttons and a flip number outside. It's all original still I think. It works really well.
Amazing how 87 year old elevator equipment can still be in use today and still working. The owners must have kept it up very well and it seems as if those mechanisms back then were built like a tank.
We have one very similar to that here In Pittsburgh I wonder if that one was wooden rails except it doesn't gave CJA it has I think Some sort of Otis button
Judging by what I know about elevator relay logic, if you gave this multiple calls, it would just reset every call and continue or reverse until the last call was reached.
***** Yay! Because my school elevator is in very bad condition. It is a 1930s Otis and it used to have black buttons. Generic came in and modernized it in the 1980s with C.J. Anderson and an entirely new cab interior, and an emergency phone was installed in 2005 or 7 I donno but it was during the time of the fire alarm replacement. And the elevator still has the original controller from 1932 and the original 2-speed motor. It breaks down once or twice a month, and sometimes when it reaches the next floor landing and stops there, the doors don't open and after a few seconds it goes to the next floor. That happened to me once this school year, and another time was when the elevator kept releveling like crazy on the first floor and the doors refused to close. My English teacher became frustrated and took the stairs, and I followed along with my friends. I ended up being late to math class because of the elevator! I hope it gets modernized soon because even the floor indicator which is a matrix indicator is burnt out. And plus, most of the call buttons including the fourth floor button do not light up. Wanna know what day it happened? *April fools day*
