Meaning of switched jack socket pins

[TTL]

Regarding 1/4" (and probably also 3.5mm) switched audio jack sockets; which pin of the actual socket corresponds to which pin in the schematic part when it comes to the switch?

And are switched jack sockets standardized in the way that they have 3 pins, the "tip" pin stays at is, while the "sleeve" and the third pin short whenever a jack plug is removed from the socket?

 

[Kabelsalat]

When the plug is held so it point to right, the connections is:
Leftmost (biggest surface area): Ground
Middle: Left channel
Right (tip of connector): Right channel.

 

[TTL]

Sorry, I meant to say a switched mono socket. Not stereo.

 

[Kabelsalat]

The same, but middle contact isn't there and the tip is signal.

 

[TTL]

Here are a couple of symbols I found online, hopefully helping to explain my questions a little better:


The above are 3.5mm types, but I assume the design is similar for 1/4" types?
Anyway, I'm guessing that the pin with the "V" on it goes to the tip of the mono jack connector while the pin with the arrow connects to it when the jack plug is NOT inserted,thereby acting as a switch. And the third pin (with a rectangle on it) must go to the GND pin (sleeve? ring?). Have I got it right?


How about the SK1 and SK2 jacks in this input amplifier circuit? SK1 appears to be inverted from SK2 (the "V" pin is upside-down in SK2 and the "arrow" pin goes the opposite way), and it appears there's also a second switch in parallel to the right of SK2. What's the deal with the upside-down parts of the symbol? Are the sockets different or isn't there a standardized way of drawing them?

 

[Audioguru]

Your schematic has parts of the jack all over the place. Maybe this explains how it works:

 

[TTL]

Got it! Thanks
If I want to label the different pins of that jack in a schematic, apart from "tip" (signal) and "sleeve" (GND) what would you call pins 4 and 5 in that illustration? "Switch" perhaps?

And for that schematic -those jack symbols are a mess and not standardized, and the up and donw arrows in the jacks don't have any specific meaning?

 

[Audioguru]

Pins 4 and 5 are the "disconnected connections". Usually two speakers (stereo) are connected to them and the speakers are disconnected when the headphones plug is inserted.

The arrows clearly show that their connection with the "V" (pin 2 or pin 3) is disconnected when a plug is inserted. I could not find a photo of a plug facing the correct direction for an insertion.

Do you see how the connection for the tip is farther away from the sleeve than the ring connection? Same as the plug. The tip might be the left channel signal and the ring might be the right channel signal.