USRE5504E - Improvement in steam-power brake devices - Google Patents

Improvement in steam-power brake devices Download PDF

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Publication number
USRE5504E
USRE5504E US RE5504 E USRE5504 E US RE5504E
Authority
US
United States
Prior art keywords
brake
reservoir
steam
air
brakes
Prior art date
Application number
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English (en)
Inventor
Geokge Westinghouse
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  • Fig. 3 is a vertical
  • Fig. 4 is a cross, section of the three-wey cock, by which I ndmit or cut off thesupplyofair to the brake.
  • Fig. 5 is an outside perspective view; and Fig. is alongitudina section in perspective of my improved coupling for uniting the brake-pipes of contiguous cars.
  • Myinven-tion 'relates to the construction of a power cnr-brake for railway cnrs or othei likeyehicles, to be operated by compressed air or' other elastic compressible liuid; and the nature of it consists in combining the elements of system of car-brake apparatus, and in the construction of devices forming a pnrt of the same, substantially 'as hereinafter set forth .and claimed.
  • c rc presentsa platform-canon which is mounted mi auxiliary engine, a a", a leed-water-pumping cylinder, c, uncairump, o, and an nir-reservoir, d.
  • a single piston-rod connection, e c', muy answer for both pumps, or cile pistonrod muy lend from the cylinder a' of the auxiliary engine-to the feed-water pump c, and another to the nirpump c. In either case the operation would be the saine.
  • b is a steam-pipe leading from ,the locomotive-boiler to the auxiliary engine a a".
  • a watenpipe extends ⁇ from the waiterta'ulton the tender to the pnmping-cylindet c,
  • an nir-pipe, i lends along under the cnrs of the trin, thc communication through .the pipe from the reservoir being opened and closed by :t three-way cock, h, presently to be described.
  • a brunch pipe, i' leads from the 11min pipe i to euch brakecylinder m opening into it bucket the piston Ir.
  • the piston-stem mplnys through the opposite end .of the brake-cylindex' m, und ut its outer end, muy be bil'urcuted so ns'to op- @rute nguinst the broke-lever n', or nn adjustable bifurcuted stem, ,jnuy be set thereon
  • the connecting-valves of the other may be closed and its piston worked in vacuo without in the least interfering with the working of the other.
  • Thev reservoir d' being filled with comf pressed air, whenever, it is desirable to apply thebrakes the cock h is turned, and the air rushes along through the pipes i i into the brake-cylinder m,'i'orces the rod m or the stem n against ⁇ the brake-lever n', whereby the brakes s are instantaneously applied to the wheels s' and the speed of the train at once checked.
  • the more the air is compressed in the reservoir'd the more powerful will be its action on the brakes.
  • the cock h is a three-waycock-that is, it opens on the three sides.
  • the air flows freely. through from the reservoir d, as described. Orr being turned one-quarter wayjaround the orilice z comes into the tubular opening of the pipe i leading to the brakecylinder, and the orifice z coincides with the orifice in the side ofthe -valve-seat, so that communication -is cut oil' from the reservoir d to the brakes, but opened from the brakecylinders to the external atmosphere. The excess of air then escapes.
  • the spiral spring Fig. 2 carries the piston 'r of the, brakecylinder m'back to the head of the brakecylinder, and thebrakes are o.
  • the length of the throw tob'e given to the brake-lever n may sometimes vary somewhat; and, hence, Inse the adjustable stem n.
  • a section of air-tight flexible pipe, k made of India rubber, .or India rubber and cloth, or other like iiexible and air-tight material.
  • valves which I use in the couplingsf f of the pipes k, where they are jointed between the 'lhese valves a-re more perfectly illus' trated in Fig. 6, where ff represent the adjacent couplings ot lthe pipes k of two consecutive cars.
  • the couplings f couple one into the other with suitable packing-rin gs o and' spring-hooks g.(preferably on opposite sides) lattached to one-half coupling enga-ge the beveled shoulders a in the face of the other coupling j' and prevent their coming uncoupled, except in case the car --coupling should break, and then the hooks g would be disengaged and the couplings be uncoupled without injury to any part thereof.
  • a puppet-valve, 1J having a stem, p', playing through a guide or diaphtagm, 4c, the two stems being of such length that when the couplings f are coupled I an uninterrupted communication through the.
  • valves p"- aremade with shoulders y', which rest against the guides q' when the couplings f are coupled and the valves p are opened; consequently the valves p cannot set back against the guides q' to' close them, nor can thecompressed'air, when admitted, close the valves p, or either of them.
  • the valves p When the pipes are coup ed the valves p must always be open. It'- they come uncoupled when lilled with com. pressed air they will be instantly closed, and must necessarily remain so. Hence, in the worst of disasters, the brakes will remain down it' once applied.
  • valves instead of the puppetvalve p other forms of valves may be used, provided they be so arranged as to operate or open each other when the couplings f are coupledA together.
  • np. valves with stems may be used.
  • win gs on the stems may be substituted. In that case the wings may be so made as to slide'in the cylindrical or other shaped cavity of the coup- ⁇ n lings f. j
  • FIG. 6 An improved mode of packing the joints of the male andfemale partsof the coupling constitutes another part 'of my invention, and the same is shown in Fig. 6.
  • I insert one or more packing-rin gs, '0, with the outer face of the sameiiush, or nearly so, with the periphery ot the male part in which it is arranged.
  • the hooks g operate with sufilcient rigidity to catch tightly in the grooves u and hold the couplings f togetherv against any ordinary force, exerted longitudinally, to which they would be subject.
  • the brakes are under the control ofthe engineer, and can be instantaneously applied atany timeand with any degree of pewerwithin the strength of the machinery employed, and the brakes can be as instantaneously released. They are simple in construction, cheaply made, can be" applied to and used in connection with, or used without, i
  • the. operation of the brakes is made indcjfendcnt of the operation of' the locomotive, so that much orlittle power can bo stored up -in thel reservoir d at any time, whether the locomotive be running fast o'r slow, or not at all; and, lit' dcsired, all the torce ofthe air-pnmp can bc applied to the brakes over and above the forcel that can be stored up in the reservoir.
  • the. brakes may be instantaneously applied and' kept on till the whole train or each separate car, if 4the careoupiings break, be brought to a complete stand.v

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