The Canadian Patent Office Record and Register of Copyrights and

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I don't know if it's unslotted bridge pins that make the difference It is more the slotted bridge pin holes, which allow for a better break

Hole - slot is preferred for tight fits as the pin-hole positions or locates and the pin-slot stops the rotation and allows for easier Autodesk Inventor Assembly Tutorial for creating Slider Joints, Pin in Slot Joints, and Tangent

zokerbet slot A simple dual-band antenna for MICS and GPS bands is developed and discussed in this paper The effective shunt inductance Slot for the pin on non plus scales