Hoisting Apparatus and Conveyors never should exceed this Breaking strengths of fiber ropes are shown in Chapter 23, "Ropes, Chains, and Slings " Safe working loads for rope used in block and tackle assemblies are, conversely 1/10 of the block's breaking strength, based on a safety factor of 10, as before For new rope, to find the required breaking strength, proceed as follows For each sheave Double and Double Triple and Double FlC 20-23 --Reeving tackle blocks Lead line and kecket line should come off a middle sheave when blocks contain more than two sheaves The upper and lower blocks then will be at right angles to each other, eliminating the tendency to tip and the accompanying losses in efficiency 3 in in diameter or larger, add 10 per cent to the weight of the load to compensate for fric tion loss Divide this figure by the number of ropes or parts running from the movable block, and multiply the resultant figure by a safety factor of 10 For example, a load to be lifted weighs 2000 pounds and the tackle consists of two double blocks --four sheaves, four rope parts at the movable block Friction loss (10 per cent for each sheave) = 40 per cent, or 800 pounds, 2000 + 800 = 2800 pounds, which divided by 4 (the number of parts at the movable block) = 700 Applying the safety factor of 10 (10 X 700) gives 7000 pounds, the required break ing strength of the rope New manila rope of 7-inch diameter has a breaking strength of 7700 pounds and therefore is the proper size for the load The safe working load for two double blocks made for rope of va-inch diameter, as given bv a prominent manufacturer for one senes of its standard blocks (regular mortise, inside iron strapped blocks, with loose side hooks, in tended for use with manila rope), is 2,000 pounds --the equivalent of the total load in the example The rope should be attached to the block with a thimble and a proper eve splice A mousing of yam or small rope should be placed on the upper hook of a set of falls as a precaution against its accidental detachment Blocks should be inspected thoroughly and frequently, with particular attention to all parts subject to wear Fig 20-23 shows how tackle blocks should be reeved If the sheave holes m blocks are too small to permit sufficient clearance, excessive sur face wear of the rope will occur Likewise, excessive internal frictional wear on the fibers will occur if the diameter of the sheave is too small for the rope When men are using block and tackle in confined spaces, the pulley block must be guarded so that their hands cannot be caught between the pulley and the rope When blocks and falls are used to lift heavy materials or to hold heavy loads in suspension, as on heavy duty scaffolds, wire rope is more serviceable than fiber rope Portable floor cranes or hoists Portable floor cranes or hoists are hoists mounted on wheels They can be moved from place to place, either by hand power or under their own power They can raise and lower loads m a vertical line but cannot rotate around a fixed point Portable floor hoists are useful where over head construction, belting, or shafting pre vents the use of overhead hoists or cranes and where more expensive equipment is not justi- 564

tics, and dyes Its odor is not pronounced enough to serve as a warning Its health hazard for acute and repeated exposures is high In one case, death was reported after several days' inhalation of an average con centration of 470 ppm Death was accom panied by central nervous system damage, bronchopneumonia, and severe liver and kid ney injury Liquid dioxane may be absorbed through the skin to produce injury Diphenyl.

OCCUPATIONAL HEALTH SURVEY NO. 1022-H BEAUMONT WORKS N.

Fri, Aug 26, 2005 11:19 AM Subject: Evette Lewis-Molock, Esq.

11:54 From:MHCM 2156239257 To:12145201181 P.4'7 1 Law Offices WILLARD, HOLWEGER, CHILD & MARTON 2 Bradford T.

DEC. 8.2005 3:14PM .

LEONARD W.

United States Patent 4,217,255 Page 5 of 9 Ik number of filler materials were used in varying combinations to produce the necessary low wear rate, Tiardness and high coefficient of friction The fillers used were cast iron grit, kyanite, cashew nut particles, red iron oxide (hematite), black iron oxide, powdered alumina, graphite, barytes, coke, kaolin, cryolite, carbon black and zinc powder.

United States Patent 4,240,530 Page 6 of 6 with synthetic latex and pre-dned, such as is employed as the raw material m the manufacture of fabric|>ased laminates Another material is a rubber-modified epoxide resin film This matenal gives Extremely high shear values, e.g., on the order of 3000 kp It has also been found that the earner plate 1 can be assembled utilizing three parts joined by two bondmg layers 4 Refemng to FIG. 1, it is seen that part 2 of the earner plate, l e, the part which is contacted by the brake piston, is not as long as part 3 Moreover, it has been found desirable to make the width of part 2 one millimeter less than the width of the friction lining 5 and part 3 When this is done, part 2 does not extend to the two lateral edges of the brake pad which, dunng braking, lie against the brake housing.

JlledSignal FEB 9 6 Rectd Product Name - Cured Organic Disc Pad - Asbestos 1.

the bendix corporation MARSHALL ECLIPSE DIVISION TROY, NEW YORK FORD MTft FIELD ACT DP P 0 6QX 2003 LIVONIA MI 46161 SHIPPED TO FORD MTR DEL VmL DEP SuRV OPER RTE 130 PEWNSAUKN NJ 08110 CLEVELAND, TENM.

m m THE BENDIX CORPORATION MARSHALL ECLIPSE DIVISION TROY/ NEW YORK FORD MTR FIELD ACT UEP P 0 UOX 2003 LIVONIA MI 4B151 SHIPPED TO FORD MTR DEL VAL DLP SEUV OPEN RTE 130 PENNSAUKN MJ OflUO CLEVELAND/ TENN, CUSTOMER ACCOUNT NO, 0U1U0 PLEASE REMIT TOj 0, 6OX *36, TROY, N,Y 1211!

THE BENDIX CORPORATION FRICTION MATERIALS DIVISION TROY, NEW YORK sold to FORD MTR FIELD ACT DEP p o aox 2003 LIVONIA MI 46151 SHIPPED TO FORD MTR DEL VAL DEP SEKV OPER RTE 130 PEHM5AUKN NJ OOllO CLEVELAND, TENN.

SHIPPER THE BENDIX!

THE BENDIX'CORPORATION MARSHALL ECLIPSE DIVISION TROY, NEW' YORK _1PV S0LD TO KMO MVR FIELi!)