. California a base di pesce e selvaggina. Pesca -- California; gioco e gioco-uccelli -- California; Pesci -- California; popolazione animale gruppi; Pêches; Gibier; Poissons. Meccanica NET-estrattore 331 l'unità assemblata pesava approssimativamente 150 libbre ma avrebbe potuto essere reso più leggero con diverse modifiche. Invece di alloggiamento del riduttore in una custodia di acciaio, come abbiamo fatto noi, alluminio potrebbero essere stati utilizzati. Un'unità più piccola come un legame di riduttore di velocità, serie QV o OEV, avrebbe potuto essere utilizzato e da tutti i calcoli avrebbe prodotto una coppia sufficiente. Questa sostituzione avrebbe tagliato il peso di almeno

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. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. MECHANICAL NET-PULLER 331 The assembled unit weighed approximately 150 pounds but could have been made lighter with several modifications. Instead of housing the reduction gear in a steel case, as we did, aluminum could have been used. A smaller unit such as a Bond speed reducer, Series QV or OEV, could have been used and by all calculations would have produced sufficient torque. This substitution would have cut the weight by at least 20 pounds. Steel tank ends were used in constructing the gurdy head but it was felt that aluminum could have been used just as well. The project's net-puller employs a v-belt drive without the benefit of a clutch, which was found to be unnecessary. However, with but a slight modification an idler pulley used as a clutch could be installed between the motor and reduction gear. An alternate arrangement would be to use a standard Briggs and Stratton motor developing a shaft speed of 3, 600 r.p.m. and having a centrifugal clutch. The gurdy would then be disengaged when the speed of the motor was reduced. With this plan a pulley speed reduction of 1:3.3 would work satisfac- torily. A centrifugal clutch would also add a safety feature in that the clutch would disengage whenever the gurdy was overloaded and the speed of the engine was reduced to half of its normal operating speed. The vulcanized gurdy head was designed to pull nets and would be a little awkward if used exclusively to pull beach seines and crab or lobster pots. When handling only lines it would be more practical to substitute a standard metal drum for the rubber one so that lines could be slacked oft" when necessary, a difticult feat if more than one turn was taken around the wooden spacer of the net gurdy. When handling lines exclusively a higher gurdy speed is desirable and this could be effected by changing th

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