Builder's hardware; a manual for architects, builders and house furnishers . ssible combinations, until the right one isfound. Combination locks cost from five dollars for the cheapestkind, to several hundred dollars for the most perfect styles oftime locks. MISCELLANEOUS LOCKS. In addition to the regular lines of lever and cylinder locks, there are severalforms which may beconsidered in thisconnection. Tubular Locks. —Some cheap stylesof lock are manu-factured of suchform that all the Fig. 344. Tubular Lock. Hollenbeck. mortising Can be done with an augur, being essentially the same in princi
Builder's hardware; a manual for architects, builders and house furnishers . ssible combinations, until the right one isfound. Combination locks cost from five dollars for the cheapestkind, to several hundred dollars for the most perfect styles oftime locks. MISCELLANEOUS LOCKS. In addition to the regular lines of lever and cylinder locks, there are severalforms which may beconsidered in thisconnection. Tubular Locks. —Some cheap stylesof lock are manu-factured of suchform that all the Fig. 344. Tubular Lock. Hollenbeck. mortising Can be done with an augur, being essentially the same in principle asthe mortise door-bolts described in a previous chapter andillustrated by Figure 56. Figure 344 shows the constructionof the Hollenbeck Tubular lock. It is too simple andcheap to afford any very great degree of security as comparedwith an ordinary three-lever lock, but for some cases it wouldanswer very well, as it saves seventy-five per cent of the laborordinarily necessary to fit a common lock to a door. It isheld firmly in place by the lugs at top and bottom, so. MIS < EL L. 1XE0 LS L 0CKS. 227 it cannot work loose. Hollenbeck also manufactures a tubularlatch on essentially the same principle. Several other firmshave tubular locks listed in their catalogues, hut they are toomuch alike and too simple torequire further illustration. Electric Lochs. — It is oftendesirable to have a lock whichcan he operated by any oneat a distance from the apartment-houses, clubs,etc., it is well to fit the front-door with a lock so connectedwith an electric battery thatwhen a, knob is pressed in anjupper story a catch in thelock is drawn hy the action ofan electro-magnet, permittingthe lock or latch to he form of lever-lock mightbe adapted to this purpose,but there are a few forms ofspecially designed electriclocks which are more commonlyused. Properly speaking these are all electric-latches, as noneof them have a locking bolt. Figure 345 illustrates Thax-ters ele
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