The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details; employed in the design and construction of ... the use of engineers, mechanical draughtsm

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1890 Excerpt: ...in an enclosed tube. Pneumatic tubes. See Section 19. 1085. Is an improved form of worm having no centre shaft. 1086. Elevator, or band and buckets. 1087 & 1088. Endless web and roller devices for conveying sheets of paper, for printing or folding. See also Raising and Lowering, Section 69. 1076. 1077. 1061. 10,75 1078. 1082 h5 1083. rqpzz-n--g--B I0S5. 1087 1088 Section 58.--PACKINGS, JOINTS, STUFFING BOXES, Ac. PISTONS. 1089. Piston with junk ring; the packing is sometimes cast iron, steel, brass, or phosphor bronze rings, or even hemp or asbestos. 1090. Small pistons have generally two rings of steel or brass sprung into the grooves. 1091. Double-acting hydraulic piston for cold water; if single acting, one leather only is required. 1092. Indiarubber rolling ring packing, used on piston water meters. 1093. Piston, with junk ring for fibrous packing. Numerous patents are in use for springs of various kinds applied to piston rings. See Section 80. STUFFING BOXES, &c. 1094,1095,1096, & 1097. Sections and plans of gland stuffing boxes. 1098. Leather packing ring or collar, used generally for higher pressures up to 3 or 4 tons per square inch. 1099. Stuffing box for hydraulic rams, up to pressures of about 1000 lbs. per square inch. 1100 & 1101. When the wear on an hydraulic leather is considerable a guard-ring should be added, as shown here. 1102. Stannah's patent stuffing box; the packing is tightened by a set screw. 1103 & 1101. Ram leathers, with gland to facilitate renewing. 1105. Grooved steam packing. It is said that the steam will not readily pass a series of grooves round a piston rod. 1106. Useful form of gland for a screwed spindle, the thread being cut in the outer cap. 1107. V-ring piston packing rings. 1108. "Bottle"...