ges claimed aresimplicity, durability, and also cheapness of manufacture, owing to the fewness of parts. It is also very difficult to pick, as the key has to pass a very FOLSOM’S IMPROVED LOCKING LATCH. difficult guard and, as already explained, to strike a number This invention is a simple,… … lock, which may be opened by the knob and locked by a key, but in which only one bolt and one spring are used. In Fig. 1, the bolt, A, is represented as shot forwardso as Patent for sale for the United States. Proposals for pur- acid, and washing the insoluble product obtained until acid to lock…
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