. The street railway review . -ly fee, members are given all the benefits usual to such organiza-tions. During the noon hour a course dinner is served at approxi-mately what the service actually costs, and supper may also behad by those who are obliged to stay late at the office. As the club building stands in a residence district and is easilyaccessible from all parts of the city, it is kept open every eveningfor the benefit of members, who make free use of the periodicalsand games contained in the reading room. Nights are also fre-quently set apart for general receptions and entertainments g
. The street railway review . -ly fee, members are given all the benefits usual to such organiza-tions. During the noon hour a course dinner is served at approxi-mately what the service actually costs, and supper may also behad by those who are obliged to stay late at the office. As the club building stands in a residence district and is easilyaccessible from all parts of the city, it is kept open every eveningfor the benefit of members, who make free use of the periodicalsand games contained in the reading room. Nights are also fre-quently set apart for general receptions and entertainments givenseparately by members of either sex, the annual dues being devotedto a fund for such purposes. Piping and Power Station Systems.—XVII.* BY WILLIAM L. MORRIS. M. E. There is another type of atmospheric valve, illustrated in (Bi-i2). which is frequently furnished by the engine valve is intended to be positively operated by hand, instead ofbeing automatic in closing. The valve must be held in position. fig. 152—(Bi-12). on its seat until vacuum has been introduced on the line, afterwhich the valve will be held shut by reason of the difference inpressure due to the vacuum. In case the vacuum valve is motoroperated it can be thrown in and the atmospheric valve partiallyclosed with the hand lever. The operator will then be able toascertain, by feeling, when the vacuum is increasing in the line,and can force the valve to its seat and hold it closed. With this valve, the objectionable feature of chattering can bepractically eliminated. There is nothing that injures the valve facesof an atmospheric valve as much as this continuous valves of 20 in. diameter and over, the chattering becomesparticularly severe. A 20-in. valve will have an area of 314 sq. if the travel of the valve is 5 in. and that of the hand lever30 in., it would be possible to hold the valve against a 1-lb. backpressure or 2 in. of vacuum by exerting a pressure of 50 lb
Size: 1397px × 1789px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
