Maker Pro
Maker Pro

Unknown traffic Relay Identification?

Status
Not open for further replies.

russwr

Dec 20, 2019
15
Joined
Dec 20, 2019
Messages
15
Only Analysis Of The Unobtainable Relays
S1R9A9M9 work shop Tech drawing was given showing the dual electromagnetic coils traffic control relays being used as black Bakelite covered, air sealed and under vacuum, with no mount bracket, no part number or make, with outside screw terminals on 2 sides. Extreme high quality made so as to last for extended period of time with reliability for 24hr traffic control, mounted in pole box, in extreme weather conditions in state of Georgia. These (new- replacements) were incorrectly assumed to be for 120v AC but had very low .6-.7 ohms resistance and would have been used on 6VAC or less. Size of each actual coil inside cover was 1 3/4" by 3/4" of 21 gauge insulated 200 degrees Celsius magnet wire. From electronics data book chart / graph , 60 cycles Frequency matched with flat edge ruler of reactance ohms , shows across to about 2 Millihenry inductance. This center PIVOT ARMATURE relay was a switching back and forth type with latching sides for use as changing the 6v green and red 6v traffic lights in Georgia. There are 6 sets of switching contact points , 4 on top, 2 on bottom, with one diode in between the 2 inductor coils. (1930's-1980) Please identify if possible.
 

Harald Kapp

Moderator
Moderator
Nov 17, 2011
12,613
Joined
Nov 17, 2011
Messages
12,613
photos? (remember: < 300 kB for upload)
 

russwr

Dec 20, 2019
15
Joined
Dec 20, 2019
Messages
15
No original photo- description given for you for your searching.
 

davenn

Moderator
Sep 5, 2009
14,040
Joined
Sep 5, 2009
Messages
14,040
Thread closed since the OP was us to do all his work
and he hasnt responded with further info
 
Status
Not open for further replies.
Top