FREE BOOKS

Author's List




PREV.   NEXT  
|<   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36   37   38   39  
40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   >>   >|  
old the ends of the cord. 4'. The same, completed. 5'. Bend with crossed strands, commenced, the one end being looped over the other. 6'. The same, completed. 7'. Necklace tie, seen on the upper side. 8'. The same, seen underneath. The greater the strain on the cords, the tighter the knot becomes. 9' and 10' are similar splices to 7' and 8' with slight modifications. 11' shows the commencement of 13', the legs in elevation; 12' being a front view. An ordinary band, made by several turns of a small rope, is lapped round them and hauled taut, and then interlaced at the ends. This done, the legs are shifted into the shape of a St. Andrew's cross. Thus the lashing is tightened, and, for further security, we pass the line several times over the tie and between the spars, knotting the ends. 13'. Portuguese knot. This is a lashing for shear legs, and must be tight enough to prevent the spars slipping on each other; the crossing of the two legs gives a means of securing the knot. 14'. For binding timbers; a, knot commenced. Take several turns round the timbers, and fasten the ends by passing them under the turns; b, knot completed. The end of a round stick, m n, termed a packing stick, should be passed under the knob, the cord being slack enough to allow of this. By turning the stick, the turns can be tightened to any extent; when tight, we fasten the longer arm of the lever to some fixed point, by a rope, p q, so that it cannot fly back. Care must be taken not to turn the stick too far, or the rope may be broken. As the timber dries and shrinks, the lever may be used to make all taut again. * * * * * THE HARTFORD STEAM BOILER INSPECTION AND INSURANCE COMPANY. The Hartford Steam Boiler Inspection and Insurance Company makes the following report of its inspections in January, 1871: During the month, there were 522 visits of inspection made, and 1,030 boilers examined--853 externally and 363 internally, while 106 have been tested by hydraulic pressure. Number of defects in all discovered, 431, of which 163 were regarded as dangerous. These defects were as follows: Furnaces out of shape, 24--3 dangerous; fractures, 47--25 dangerous; burned plates, 29--14 dangerous; blistered plates, 54--10 dangerous; cases of sediment and deposit, 97--18 dangerous; cases of incrustation and scale, 70--24 dangerous. To sho
PREV.   NEXT  
|<   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36   37   38   39  
40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   >>   >|  



Top keywords:
dangerous
 

completed

 

defects

 

lashing

 

fasten

 

timbers

 
tightened
 

plates

 

commenced

 
Boiler

Hartford

 

report

 

INSURANCE

 

COMPANY

 
Inspection
 

Insurance

 

inspections

 
January
 

Company

 

broken


timber

 

HARTFORD

 
During
 

BOILER

 

shrinks

 

INSPECTION

 
burned
 

discovered

 
Number
 
blistered

tested

 

hydraulic

 

pressure

 

fractures

 

regarded

 

inspection

 

visits

 

incrustation

 

Furnaces

 
boilers

deposit
 

internally

 

externally

 

sediment

 
examined
 

lapped

 

hauled

 
ordinary
 

interlaced

 

Andrew