USRE6948E - Improvement in steam and air brakes - Google Patents

Improvement in steam and air brakes Download PDF

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Publication number
USRE6948E
USRE6948E US RE6948 E USRE6948 E US RE6948E
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US
United States
Prior art keywords
valve
vacuum
pipe
air
brakes
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English (en)
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Improvement In Steam
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  • FIG. 1 represents in outline my improved apparatus as attached to the under side of a' car-body.
  • FIGs. 2 and '3 are enlarged sectional viewsof the valves and valve-bcxes em ploycd in the apparatus of Fig. 1.
  • My invention relates, partly, to an improved 'l arrangement ot devices for and mode .of ap plying the brakes on railway-cars by means of a vacuum or atmospheric pressure.
  • a vacuum, partial or complete is created, as occasion requires, or is created and kept up in the brake-pipe or in a separate vacuum chamber, or in both, and where such a vacuum is kept up, the construction is such that, by
  • A'A represents a double linerof brake-pipes, extending from cud to end ofthe car, and coupled to like li'nes otpipe on the contiguous car or cars. These l call the operating-pipes.
  • a B is a pipe also coupled at its ends, by suitable couplings or flexible tubesV b, as hereinafter described, to-a like line of' pipe on the contiguous car or cars.
  • This 1 call the vacuuurpipe. In it a vacuum or partial vacuum is always to be preserved,wl1en the train is running, by means of any suitable pump, ejector, or other exhausting apparatus, preferably arranged on the locomotive' or tender.
  • V is thevacuum-cbamber
  • C the brakecylinder, the latter having a piston with connections thence to the brake-levers, such that, by means of a .vacuum or partial vacuum therein, the brakes will be applied to the wheels.
  • a flexible collapsing cylinder may be used with a pistonstenl attached to the movable head.
  • the operatingpipes A A are connected by a pipe, a, havingr a valve-case and a double valve, a. From this valve-case, at apoint between the valves, a pipe, c2, passes around past the brake-cylinder U and vacuum-chamber'V and opens into the. pipe B.
  • valve-case and double valve o1 In it is the valve-case and double valve o1, with a branch pipe from between the valves to the brakecylinder C. It also has a valve-case, c, containing-a. triple valve, with a branch pipe from between the two larger of the valves to the ⁇ vacuum-chamber V. largest of these three valves is toward the vacuum-pipe B.
  • the construction of the double valves a and c is shown iu Fig. 2.
  • the case m has a pipe connection at each end.
  • the stein m1k has a valve, m2, at each end.
  • the valves are preferably ofthe kind known as wing-valves. They have a limited motion, 'lh'is double valve is substantially such as is 'described in Letters Patent No.
  • n has a pi [ue-connection at each end, and a side counection from between the two larger valves, which leads to thervacuum-chamber V.
  • the stem 'nl carries a larger valve, 113,21. smaller valve, u, both of which seat inwardly on gum seats ni, and a slide or ring valve, n"which covers and uncovers a port, n?, leading to .the-
  • Tllese three valves have a lim- The largest valve
  • u has a cup-shaped packing-ring, o, pressed 'out by a wire or other suitable spring, o'. All thcyalves above-referred to are arranged in the manner shown in outlinein Fig. 1.
  • This, apparatus is designed tobring atmospheric pressure to bear ou one side of the piston of a brakec'ylinder
  • i brake-'cylinder is brought into communication willi the vacunnrspace of the 'vacuum-pipe or vacuum-chamber, or both, by allowing aticos pheric air to enter one of the pipes.
  • Thcyacunm in' V will then be operative on the double valve in ol, so :1s-itc open the upper .and close the lower valve, and thus open communication with the bralrecylinder U. 'The air in it will be partially exhausted. into the vacuum thus will result in applying the brakes.
  • vacuum as above used, I mean what is commonly known by that name, either a total or partial vacuum.
  • the devices described may be varied i'somewhat in arrangement, and all variations which secure the same function by substantially the same means I include in my. inven tion.
  • a vacuum brakecylinder, G of suitable l construction, a doubleended imviu'dly-scat ⁇ ing valve, arranged to open communication with the pipe of greatest and-cut oi com munication with the pipe of least vacuum pressure, substantially as set forth.

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