Overhead Garage Door (Patent No: 445308)

Inventor: Coulson, Gordon Raymond

Location: Calgary

Comments: N/A

Description: Gordon Raymond Coulson, Calgary, Alberta, Canada, 2nd December, 1947. Filed 20th September, 1945. Serial No. 531,843. In the United States 31st August, 1945.

Claim.—1. The combination in a garage door of tracks on which the door is slidably mounted and extending vertically from a point near the bottom of the door frame on each side thereof to a curve above such door frame, and thence substantially horizontally rearwardly thereof, and means to move the door between a substantially vertical closed position and a substanially horizontal open position which consist of a single cable of which the ends are fastened to drums rotatable in unison and affixed to the structure of which the door frame forms part.

2. A combination as described in claim 1 in which the cable between its ends is threaded successively over a sheave near a bottom corner of the door. A second sheave mounted on the fixed structure at one side. a third similar sheave mounted toward the rear of the structure, a fourth sheave mounted on the door near a top corner thereof, a fifth sheave mounted near the opposite top corner of .the door, a sixth sheave mounted similarly to the third, a seventh sheave corresponding to the second but on the opposite side of the structure, and an eighth sheave corresponding to the first.

3. The combination in a garage door of tracks on which the door is slidably mounted and extending vertically from a point near the bottom of the door frame on each side thereof to a curve above such door frame, and means to move the door between a substantially vertical closed position and a substantially horizontal open position which consist of a single cable of which the ends are fastened to drums rotatable in unison and affixed to the structure of which the door frame forms part, the cable between its ends being threaded successively over a sheave near a bottom corner of the door. a second sheave mounted on the fixed structure at one side. a third similar sheave mounted toward the rear of the structure, a fourth sheave mounted on the door near a top corner thereof, a fifth sheave mounted near the opposite top corner of the door, a sixth sheave mounted similar to the third, a seventh sheave corresponding to the second but on the opposite side of the structure, and an eighth sheave corresponding to the first.

4. A combination as described in claim 3 in which the third and sixth sheaves are under tension.

Claims allowed, 4.