444 SEC. 12. APPLIED MECHANICS. 



2178eg. Model in Silver. Patent " Stockless " anchor, small 

 craft anchor. Wasteneys Smith, C.E. 



2178eh. Model in Brass. Patent " Stockless " anchor. 



Wasteneys Smith, C.E. 



These anchors are said to possess 



1. Great holding power, with less weight, besides being diminished in the 

 weight of the stock. 



2. Extraordinary strength, proved at Lloyd's test. 



3. It is always canted, no matter how it falls, and requires no stock to keep 

 it canted. 



4. Being always canted when on the ground, and by the assistance of the 

 horns or toggles, it takes hold as soon as any strain is put upon the cable. 



5. Spare, and wider, and different shaped arms for various grounds may be 

 carried on board. 



6. It will not foul or get fouled, and when holding there is nothing above 

 ground, nor is there any stock to cause accidents. 



7. It trips with great ease, because there is no stock to lift, and the crown 

 end has so large a surface that good purchase is obtained for weighing. 



8. It is easily fished, and can be stowed in-board on deck, thus clear of the 

 bow, and avoiding risk of damage in case of collision of any description. 



9. A ship may speedily be brought up by it, and ride with very short cable ; 

 the steadying power being at the crown end, it is of no object if the shank is 

 raised off the ground, which stocked anchors will not allow. 



10. In shallow water no damage can occur to a ship's bottom, as no part 

 of the anchor projects above ground. 



11. It is at least one-third shorter than ordinary anchors, therefore soon 

 clear of the water, and more convenient to manage. 



12. It can readily be disconnected, thus convenient to stow and easy to 

 transport in case of need, its heaviest part being less than one-third its total 

 weight. 



13. It is made without welding, thus of great soundness. 



14. It is worked with only one davit (being hoisted and let go by the fish 

 shackle), therefore considering the saving of first cost and future maintenance 

 of one davit and blocks, &c., it is by far the cheapest anchor to use, besides 

 greatest safety and simplicity in working. 



15. It is not dangerous when at " wash," for in the event of a collision, the 

 arms would simply be flattened to the ship's side instead of being driven in. 



16. Should the anchor be difficult or dangerous to weigh, from having got 

 fast in rock or wreckage, a runner with messenger attached may be slipped 

 down the cable to the crown end, and by this means the anchor can be drawn 

 out freely, as there are no barbs or palms to retard it. 



17. Being of such greater 'strength and holding power, and requiring less 

 cable than other anchors, shorter and stronger cables may be carried, thus 

 increasing the safety of the ship without additional weight or cost. 



2179. Model of J. Ericsson's Screw Propeller Engines, 



applied to the American and Swedish Monitors, patented in 

 America in 1858. 



Lent from the Patent Office Museum by the Commissioners 

 of 'Patents. 



2180. Models of Screw Propellers. 



Council of King's College, London. 



