US1533692A - Accelerator - Google Patents

Accelerator Download PDF

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Publication number
US1533692A
US1533692A US672965A US67296523A US1533692A US 1533692 A US1533692 A US 1533692A US 672965 A US672965 A US 672965A US 67296523 A US67296523 A US 67296523A US 1533692 A US1533692 A US 1533692A
Authority
US
United States
Prior art keywords
piston
valve
chamber
casing
train
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US672965A
Other languages
English (en)
Inventor
Bozic Dobrivoje
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR576135D priority Critical patent/FR576135A/fr
Priority to GB26944/23A priority patent/GB206826A/en
Application filed by Individual filed Critical Individual
Priority to US672965A priority patent/US1533692A/en
Application granted granted Critical
Publication of US1533692A publication Critical patent/US1533692A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/36—Other control devices or valves characterised by definite functions
    • B60T15/42—Other control devices or valves characterised by definite functions with a quick braking action, i.e. with accelerating valves actuated by brake-pipe pressure variation

Definitions

  • Thisdesideratum is realized byallowing' the air to'escape fromfthetrain pipe either into the atmosphereor in'tothc brake cylinderer into isolatedfchambers-by Wayot socaliedaccelerators: Accelerators which ei;- cNA ⁇ what may be designated a total f action produce an excessiifefd'i'opo'ffpressure inthe train'piparesultiiigfin-useless Waste of the air and in a braking eifect of constant rapidity acceleratorsl which exercise a partial fand repeated action cannot'l be reliedonto operate iithcertainty.4
  • the rapid pressuref-dropN in the train pipe effects' the movement ot'fa'- ⁇ piston located ⁇ above an isolated chamber..l iilled i with air at the initia'lpressurej bringingzafbout the' openingofl a distributor'unitary with said piston; the action Voff'the ⁇ accelerator being interrupted by emptying'theisolatedlchainber.
  • the evacuation and closure ofthe isolated chamber may be effectedl at the same time asthe closure ot the distributing member, there being employed two yalyes arrangedfto close sinniltaneou-sly.
  • Fig. 1' there is 'formedl in the-body l of the acceleratora passage 8 connected to the 'main train pipe and conimunicating by Way of passages 7l andy 79 with the ehai'nber.
  • 73 above the accelerator piston @L which separates this chamber from the chamber 'e'
  • the stem tiofthe piston penetrates the base of theV chamber and 'enters tl'iepassage Tl', closing With-thc Valve T7 at'the end oisaid stem the passage'TS leadingto the atmosphere or tothe brake cylinder.
  • spring 79 urges the. piston T4 down ⁇ farfls.
  • Valve 8O the stein 8l ot' which enters the; cavity 82" and is 1" ined as a piston, serringfto balance the rah e when the cavity is connected: with Vthe passa-geil. by way ot the port
  • the part o'fftlic cavity 82 between the valve 8O andits piston comiiiunicates with the chamber 75 by Way oie.
  • acceleratorl does not come into action. Vhen the diminution in pressure iseiiiected With sufficient rapidity and is of suliicient amount, the enclosed air thrusts the piston 74 up'- vinto wardly, so that the valve 7T opens and air passes from the train pipe into the passage 78.
  • the piston 7a is thrust upwardly until it abuts on the stop, when, in consequence of its inertia, the balancing valveV 80 is unseated and the air passes from the isolated space into the chamber 73; the accelerator piston 74 under the influence of the spring 79 and of the excess pressure acting on the valve 77 commences to descend and closes the valve.
  • the valve 80 can only engage its seat again when the air current coming from the isolated space is directed against its cap and suppressed.
  • a hollow stem for said piston extending down through the bottom wall of said lower co-mpa-rtment, and being formed at its lower end as a valve to control a port in the bottom wall of the casing, said hollow stem having ports communicating with said lowercompartment through which the air therein can escape into said hollow stem and thence into the .upper compartment on the operation of the device, and also having ports communieating with a passage located between the ⁇ chamber and the casing which passage is connected with the train-pipe, and a branch of which passage communicates with the upper compartment of the chamber.
  • aI casing normally containing fluid under pressure, of aI casing, a chamber in said casing, a piston within said chamber dividing the same upper and lower compartments, a spring acting to depress said piston, a hollow stem for said piston extending down through the bottom wall of said lower compartment and being formed at its lower end as a valve to control an exhaustport in the wall of the casing and having ports communicating with said lower compartment, and other ports communicating with a passage located between the chamber and the casing, -which passage communicates with the train-pipe, a branch of which passage also communicates with the upper compartment, a balancing valve located in said hollow stem, a. stem for said valve, and a piston formed on said rod.
  • balancing valve located in said hollow stem, a rod for said valve, and a piston formed on said rod, said first-mentioned ports in the hollow piston stem being adapted to permit the escape of air from said lower compartment into said hollow stem and thence into the upper com- 30 partment'on the opening 'of the balancing valve.
  • a branch ot which passage also communicates with the upper compartment, a ⁇ balancing valve located in said hollow stem,

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Braking Systems And Boosters (AREA)
US672965A 1923-11-05 1923-11-05 Accelerator Expired - Lifetime US1533692A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR576135D FR576135A (fr) 1923-11-05 1923-10-26 Accélérateur pour frein à pression fluide
GB26944/23A GB206826A (enrdf_load_stackoverflow) 1923-11-05 1923-10-27
US672965A US1533692A (en) 1923-11-05 1923-11-05 Accelerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US672965A US1533692A (en) 1923-11-05 1923-11-05 Accelerator

Publications (1)

Publication Number Publication Date
US1533692A true US1533692A (en) 1925-04-14

Family

ID=24700760

Family Applications (1)

Application Number Title Priority Date Filing Date
US672965A Expired - Lifetime US1533692A (en) 1923-11-05 1923-11-05 Accelerator

Country Status (3)

Country Link
US (1) US1533692A (enrdf_load_stackoverflow)
FR (1) FR576135A (enrdf_load_stackoverflow)
GB (1) GB206826A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
GB206826A (enrdf_load_stackoverflow) 1924-09-18
FR576135A (fr) 1924-08-11

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