Device for Operating Elevator Doors (Patent No: 300707)

Inventor: Lorimer, Thomas Morison

Location: Lacombe

Comments: N/A

Description: Thomas Morison Lorimer, Lacombe, Alberta, Canada, 3rd June, 1930. Filed 4th December, 1929. Serial No. 358,367.

Claim.—In a sliding door opening and closing device the combination of a hand lever manipulating a cable and pulley system to close said sliding doors, a gravity controlled counterweight tightener a hand lever manipulating a cable and pulley system to close said sliding doors, a second gravity controlled counterweight tightener, each lever being dependent on the other lever for its subsequent return to a normal position by continuous connection between the two said levers, all as set forth in the specifications and drawing.

Claim allowed, 1.