Builder's hardware; a manual for architects, builders and house furnishers . r and run over a metal tracksecured to the floor. There are manykinds of large sheaves and rollersmanufactured for barn-doors, whichare too simple to require any illustra-tion. The commoner kind consists ofa large wheel with a steel or metalaxle. The better kind of barn-doorrollers are provided with anti-frictionaxle bearings ; that is to say, the axleof the wheel revolves in a cycle ofsmall pins or rollers by which the fric-tion is considerably reduced, and thewear on the bearings very materiallydiminished. Figure 13
Builder's hardware; a manual for architects, builders and house furnishers . r and run over a metal tracksecured to the floor. There are manykinds of large sheaves and rollersmanufactured for barn-doors, whichare too simple to require any illustra-tion. The commoner kind consists ofa large wheel with a steel or metalaxle. The better kind of barn-doorrollers are provided with anti-frictionaxle bearings ; that is to say, the axleof the wheel revolves in a cycle ofsmall pins or rollers by which the fric-tion is considerably reduced, and thewear on the bearings very materiallydiminished. Figure 138 is an ingen-ious device for a barn-door roller, theworking of which will be readily ap-parent from the drawing. The innerplate, A, is screwed directly to the door, through the openings inthe wheel, B, which revolves on the anti-frictional bearings. Figure 139 showsa form of barn-doorrail, intended to beused with a wheelwhich shall rest onthe flanges and notbear at all on the Fig. 13 9. Nickel Barn-door Rail. Coleman Hardware Co. Upright J)Ortioil. Ill Barn-door Fig. 138. Acme Barn-doorRoller. Moore Mfg. Co. Stay-roller. 92 B UILDERS HA RD WA RE.
Size: 1142px × 2188px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
