Image from page 262 of “American engineer and railroad journal” (1893)

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Image from page 262 of “American engineer and railroad journal” (1893)
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Identifier: americanengineer81newy
Title: American engineer and railroad journal
Year: 1893 (1890s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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due to the action of the wheel-pieces as equalizers. The truck shown in Fig. 2, page 180, is just what is advocatedby those who would omit the equalizer. There we have springsover the boxes, supporting the truck frame. The piece havingthe shape of an equalizer we can call a wheel-piece truss rod,or a spring seat hanger, and we shall have in principle justsuch a truck as that of the New York Central car, page 81(March issue). The omission of equalizers would reduce theweight of each truck by about 600 lbs. It is a mistake to consider that the best American roadbedsare not as good as any to be found in Europe, and that the rid-ing qualities of European trucks are thereby explained. T. Y. To the Editor: Below are noted some thoughts that occurred to the writer onreading the communication on Equalizers on PassengerTrucks in your May issue. When equalizers are removed from these trucks, the frameswill not be supported by blocks on the journal-boxes, but by COXS TIME AND COST COMPUTER joo V

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springs. Such a truck is shown in the March issue of TheAmerican Engineer, under a New York Central car, page 81.There may be some uncertainty as to what kind, and propor-tions, of springs will be most satisfactory for supporting theframe. The common European practice is to employ long, flat,semi-elliptic springs with small helical springs interposed in thehangers. This arrangement is particularly conducive to easyriding. The principle commonly employed in equalizing is to groupthe supports into three sets, the supports of each set being equal-ized. If there are but two groups the supported load is in un-stable equilibrium, and is in danger of being overturned unlesssome outside influence holds it in position. If the two wheelson each side of a four-wheel truck were really equalized by theequalizer, the truck frame would be tilted by the action of thebrakes and by resistance to motion, until the wheel-pieces rested AMERICAN ENGINEER AND RAILROAD JOURNAL.

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Image from page 851 of “Washington (District of Columbia), city directory” (1921)
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Identifier: washingtondistri00unse
Title: Washington (District of Columbia), city directory
Year: 1921 (1920s)
Authors:
Subjects:
Publisher: Polk
Contributing Library: Allen County Public Library Genealogy Center
Digitizing Sponsor: Internet Archive

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-12 Union Trust bldgIng Ohas rl609 Riggs pi nw Ingalls Chas W comp dept agr rl, 2501 Pa av nw C W computer navy yard rl337 Q nw David B elk r807 18th nw Edna M phone opr r4118 Chesapeake nw Geo C mtrmn h4708 Wis av nw Jas elk Kamis res Mitchellville Md John D meeh navy yard h2264 High se J Franklin switchtndr Cap Trac Co hl325^ Wis av nw J Richd printer Columbian Ptg Co h4015 Belt rd nw J Vernon reprmn Underwood Typewriter Co rl325 Wis av nw Lois (wid Jasper) r45 R I av nw. Mabel L elk war rl, 1322 12th nw Mary E phone opr r4118 Chesapeake nw Norman L elk Philip T Hall (inc) res Potomac Md Richd printer h4812 41st nw Walter L h912 8th nwIngberg Simon II asso physicist bu stand res Elmhurst 111Inge Berkley E ordnancemn navy yard hl09 4V4 nw II Berkley E jr sten treas r234 3d nw Chas elk Natl Catholic Welfare Council rl609Rlggs pi nw AJ, ,JJ AM O A. EVERYTHING IN GAS MUOdiman & lO. ^electric: lights TELEPHONE M 140 PAUL F. GROV E FIREI NS u RA NCE SOUTHERNBLDG. WashingtonD. C. 876

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TELEPHONES MAIN 1108-1109 1300G. St. N.W. PATENTS MASON, FENWICK & LAWRENCE PATENT LAWYERS Established 59 Years 600 F St N. W. Booklet on Request Phone Connection* TRADE MARKSCopyrights ROOFING—HEATING R.K.FERGUSON,Inc GUTTERS—SPOUTING 1114 NINTH STREET N. W«Phones: North 231-232 Roofing Department INGE Lillian card punch opr war risk rl09 4% nw Randolph chauf rlO R nw Susie H Mrs elk treas h42, 1332 I nw Wm B elk war rlO R nwIngebrecht Albert printer r716 16th seIngels Geo B slsmn Loose-Wiles Biscuit Co r810tt11th nw 11 Nellie elk war r Union Station Plaza Norman I elk rll4 Anacostia rd ne Ruth B elk Wash Whol Drug Exchange r610 8th neINGENIERIA INTERNATIONAL, 610-611 Colorado Bldg. Tel Franklin 4016Ingersoll Agatha F (wid Oliver) elk war .risk rl326Park id nw Alice O Mrs bkpr Philip T Hall (inc) r2118 3d ne Clara rl511 16th nw Fannie H h511 4th nw Hattie B Mrs drftsmn dept int res Springfield Md Helen .F notary 837 Woodward bldg r2118 3d ne Lalla B (wid John C) hl803 Philip

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Image from page 14 of “Pes Mechanicus Artificialis Uber Neu-Erfundener Was-stab” (1718)
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Identifier: pesmechanicusart00sche
Title: Pes Mechanicus Artificialis Uber Neu-Erfundener Was-stab
Year: 1718 (1710s)
Authors: Scheffelt, Michael
Subjects:
Publisher:
Contributing Library: The Computer Museum Archive
Digitizing Sponsor: Gordon Bell

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3ur mkm Edition.

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