C15A Wireless Signal Buzzer

[Phil Waterman]

Hi Jordan

Loud little video, but you can see how it would get the drivers attention even in a CMP. Modern equivalent would get a recorded message saying the driver is unavailable at this time please leave a message.

As a teenager spent several summers working in a summer camp (1960s) because of the small number of people who could drive a nonsychro manual transmission I was selected to drive the camps 1948 F5 Ford stake truck hauling 18 to 20 campers. If they wanted the driver they pounder on the cab roof. Which was similar to being inside a kettle drum.

Enjoyin your work.

Cheers Phil

[David Dunlop]

Jordan. I found some photos of the Signal Buzzer Switch and Lanyard Setup for the 2K1/2K2 Wireless Boxes. This one is the switch itself. A simple teardrop shaped cover over the spring loaded contacts that are kept in the open position by the spring until the lanyard is pulled. The Lanyard is originally a white cotton heavy sash cord which ages into a weird reddish brown over time. it is looped through the switch plunger ring and clipped back against itself with a common metal cord/cable crimp.

I can guarantee these stitches were common items in the GM 100, 150, 200 and 250 Series Transit Busses they built well into the 1980's. The buses with the green tinted windows along the upper sides and that always smelled of diesel fuel inside. If you know of a transit bus graveyard anywhere nearby, definitely worth checking out.

David

[David Dunlop]

Jordan. Here is what the lanyard rings look like and the spacing arrangement along the 2K1/2K2 Wireless Box ceiling. Only two rings are used. The second, outermost ring is equally distant from the centre one as the centre one is from the switch. The lanyard is looped back upon itself at the end ring and crimped as per at the switch.

David

[David Dunlop]

Jordan. Here is what the run of wiring from the Signal Buzzer Switch to the wall conduit feed point should look like.

David

[David Dunlop]

Jordan. This is what the conduit pipe looks like in the front wall of the 2K1/2K2 Wireless Boxes. As you can see, it is actually placed inside one of the front wall steel frame channels. Welded at the base through the floor. The face of the upper elbow that pokes through the front plywood is threaded to take a finishing ring which holds the upper end of the conduit in place.

If you are wondering what the short cable is, sticking out of the front floor just to the right of the conduit, that is the ground cable which connects the end of the big copper buss bar to the steel frame of the box underneath the front floor. It is a heavy shielded copper cable for some reason.

A set of four flat grounding straps, with the flat end lugs on them, are located, two to each heavy steel U-Channel that house the oak rails. One at each end roughly where the big U-Bolts clamp the Wireless Body to the Vehicle Chassis Rails. This assures ground continuity for the electricals right back to the Cab and Chassis assembly.


Hope this all makes sense out there.

David