The Keyboard
The LINC keyboard, manufactured by company named Soroban Engineering, had a unique locking solenoid. The internal mechanism of each key had a slot that worked with a set of bars to encode the character and another slot that caught a locking bar, which locked all the keys in one mechanical movement of the locking solenoid.
When the user pressed a key, the LINC would lock the pressed key in its down position, and all the other keys in the up position, read the key into a hardware register, then, when the running program read the register, the hardware would release the lock and the pressed key would pop back up. This had the effect of slowing down typing and preventing even 2-key rollover. This exotic keyboard was abandoned in favor of Teletype keyboards, such as the Model 35 KSR and Model 37 KSR, in the LINC-8 and PDP-12 follow-on computers.
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