If it's the one I remember then the switch is integral to the socket. You have to remove the knurled nut and then pull out the socket.
Not sure you can repair it. You might have to find a Edison socket with a twist switch.
I have a very old droplight that has a similar looking switch. It toggles side-to-side for on-off. It's spring-loaded and alway returns to the center position.
I have a very old droplight that has a similar looking switch. It toggles side-to-side for on-off. It's spring-loaded and alway returns to the center position.