53G 



Popular Science MoufJily 



A 



A Hand-Magnet That Lifts Fifteen 

 Times Its Own Weight 

 SKVKN-POl'M) 

 h a n d - m ii g n e t 

 v.hich is capable of 

 lifting castings of from 

 ten to fifteen times its 

 own weight fills a long- 

 felt want in machine 

 shops where it is usee 

 for clearing chips anc 

 borings out of the ma- 

 chiner},-. Tiiis is onK' 

 one of its many uses, 

 however, since it re- 

 covers dropped tools, 

 bolts, and boring bars 

 which could not ln' 

 easily recovered from 

 awkward places. 



Where large quan- 

 tities of brass and iron 

 filings accimuilate, the 

 magnet is used to sepa- 

 rate the brass from the 

 iron. The magnet 

 is used to pick up 

 hot or awkward- 

 ly-shaped castings 

 and can also be 

 suspended in 

 liquids such as 

 paints, glazes and 

 chemicals to at- 

 tract to itself any 

 particles of iron or 

 steel which uvvi 



Mooring-Hook Locks Itself 

 to Eyebolt 



Where large quantities of brass and iron 



filings accumulate this magnet will be 



found invaluable for separating them 



remo\ei 



THK harder the boat 

 moored on the 

 new self-locking moor- 

 ing-hook pictured be- 

 low pulls, the less 

 chance there is for the 

 boat to get loose, in 

 use it is merely neces- 

 sary to toss the hook 

 into the e\ebolt on the 

 dock or buoy and the 

 \acht is fast, since it 

 automatically locks, al- 

 though there arc no 

 springs in thede\ice. To 

 loosen it a poke of the 

 boat-hook is sufficient. 

 The lock is composed 

 of anordinar\' hook, to 

 the tip of which is 

 attached a le\-cr, 

 which catches a 

 piece of steel in the 

 shank of the hook 

 nuich as a door- 

 latch is caught. It 

 camiot be loosened 

 unless the upper 

 end of the catch is 

 pushed forward. 

 This is accomplish- 

 ed by a thrust of 

 the fingers or of a 

 bt)at-hook in the 

 o|)posite directi(Mi, 

 from that inw hicli 

 the boat itself is 

 pulling. 



.Ail pulls on the 

 line itself are tak- 

 en up by thehot)k. 

 Should the line 

 be twisted, so as 

 to ])ull in the 

 o|)posite direc- 

 tion, the pull is 

 taken up 1)\' the 

 lexer which is 

 c.iught and held. 



The hnrdt-r tlir boat 

 pulls on the hook the 

 less chiincc it has of 

 lircaking loose from 

 this type of mooring 



