counter weight garage door

A user called for a garage door not to be opened and an error message on the LCD screen showed unnecessary force to open. I handled it on the phone as the torsion springs are broken. We had barn doors before we had the whole idea of garage doors. We got into garage doors as technology advanced. The first idea of overhead doors was to tie together two barn doors and add rail to the top and rollers to make the door toggles with a counterweight mechanism. This was the first step to make the door in the garage styled flip open chin buster. The replacement of counterweights with spreading springs removed the need for a heavy weight.t pulley system.