US3797616A - Pneumatic timer - Google Patents

Pneumatic timer Download PDF

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Publication number
US3797616A
US3797616A US00222819A US3797616DA US3797616A US 3797616 A US3797616 A US 3797616A US 00222819 A US00222819 A US 00222819A US 3797616D A US3797616D A US 3797616DA US 3797616 A US3797616 A US 3797616A
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US
United States
Prior art keywords
bellows
cupel
wall
filter
timer
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
US00222819A
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English (en)
Inventor
A Faffart
C Vinot
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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
Application filed by La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Application granted granted Critical
Publication of US3797616A publication Critical patent/US3797616A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/24—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a non-rotatable moving part
    • H01H43/28—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a non-rotatable moving part the actuation being produced by a part, the speed of which is controlled by fluid-pressure means, e.g. by piston and cylinder
    • H01H43/285—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a non-rotatable moving part the actuation being produced by a part, the speed of which is controlled by fluid-pressure means, e.g. by piston and cylinder adjusting the time interval by means of an adjustable orifice, e.g. needle valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/10—Delay devices or arrangements

Definitions

  • ABSTRACT An open-circuit pneumatic timer of the type comprising an air intake filter, a timing device having a throttling channel, a bellows and connecting openings, wherein the filter is housed in a regulator shaped like a circular cupel, the bottom of which rests directly on the throttling channel and is provided with an opening cooperating with the said channel.
  • This invention relates to a pneumatic timer whose components are specially designed to be housed in a box fitted with auxiliary contacts whose operation it is to defer for a certain time, the said box being generally designed to form part of a switching device such as a contact-maker, wherein several identical boxes are often mounted side by side. In some switching devices, timers are at present found wherein the fluid moves either in closed circuit or, conversely, in open circuit.
  • a known timing device of the type in which the fluid circulates in open circuit comprises, housed in a box, an air intake filter, a timing device equipped with a throttling channel whose effective length can be adjusted by means of a rotary regulator, a bellows expanding to a maximum volume under the action of an interior spring and channels enabling the fluid to pass through all these components.
  • the filter is positioned under the regulator, which made the device quite substantially more complex; moreover, the valve exhausting the air from the bellows is also positioned between the regulator and the bellows, which considerably decreases the effective volume of fluid and, consequently, narrows the range of setting times.
  • the object of the invention is to provide a pneumatic timer in which the above disadvantages are considerably reduced, by using a filter with the largest possible surface, bearing in mind the small bulk made necessary by the side-by-side mounting mentioned above, and in which measures have been taken for the distance covered by the fluid, outside the area where throttling is required, to be kept to a minimum.
  • the penumatic timer in accordance with the invention comprises, housed in a box, an air intake filter, a timing device equipped with a throttling channel the effecting length of which can be adjusted, a bellows expanding to maxiof which houses the filter and the bottom of which,-
  • FIG. 1 is a sectional view of a timer in accordance with the invention.
  • FIG. 2 is a view from below, with the bottom of the box removed.
  • This pneumatic timer consists mainly of box sides 1, a bottom 2 and a partition 3. The various component parts of the timer are assembled around the partition 3.
  • the timer is designed, in the non-limiting example described, to cause the timed closing of contacts which have been shown in the form of a fixed contact 5 cooperating with a moving contact 6 carried by a rocker arm.
  • the latter consists of a lever pivoted at 9, one end 7 of which carries the moving contact 6, while the other end is divided into two parts 17 and 17 forming a fork (see FIG. 2).
  • the bottom limb 17 of this fork carries an extension 16 equipped with a pin 10 parallel to the axis of rotation of the pivot 9 (FIG. I).
  • This bolt has a second limb 13.
  • This limb 13 is itself in the shape of a fork (see FIG. 2) which bears on a cross-piece 15 connected to the movement of a bellows 21 by means of a return spring 18.
  • This cross-piece shown in the at rest position in FIG. 1, can lift against a spring 20 when a thrust is exerted on a mobile plunger 19.
  • the crosspiece 15 moves the pivotal unit 7, l7, l6 clockwise, which causes the contacts to open and the pin 10 to lock on the shoulder 11.
  • the timer proper comprises, besides the mobile plunger 19 and the spring 20, the aforementioned bellows 21, a front surface 22 of which is applied by spring action from inside against the partition 3 by an annular shoulder 23 on a coaxial cylindrical rod 24.
  • This cylindrical rod goes through an opening 45 in the front face 22 and an opening 46 in the partition 3', it also goes through an opening 47 in a timing device 26 integral with a rubber washer 27 and through an opening 48 in the bottom 40 of a rotary regulator 25.
  • FIG. 1 shows that the regulator 25 and the timing device 26 are applied directly to each other and that the latter is applied against the partition 3 by means of the rubber washer 27, a spring component 39 and a washer 28, which is integrated with the rod 24.
  • ports can be seen at 30, 31, 32, 33, 34 and 35 which communicate with a throttling channel 36 formed in the surface of the timing device 26.
  • ports whose section can be of a size suitable to prevent dust or condensation from collecting, are moreover very short.
  • the figure is not exactly to scale in order to make the drawing clearer, but it is easy to see that the lengths of these various ports can be very short. This is due to the relative positioning of the various components, which means that only the throttle of the throttling channel has to be taken into account for long times, even when the section of the other ports is decreased for some reason.
  • FIG. 1 shows a filter 29 whose diameter is very close to the width of the box. This filter is therefore large, and this has only been achieved due to the fact that the filter is positioned inside the cupel-shaped regulator 25. In fact, as the main surfaces of the box of the timer are either intended for purposes of mechanical or electrical connection or close to other instruments, it is not desirable to position the filter thereon.
  • the filter 29 is, moreover, fixed axially by a cover 37, itself fixed on the regulator 25 and, together with the latter, forming bent air intakes 38. These ports act as baffle plates against foreign bodies, while leaving a wide passing section for the fluid.
  • the rotation of the regulator brings the port 30 into a position opposite a certain portion of the channel 36 so that the distance covered by the fluid before it reaches the port 31 can change and the working time be altered.
  • the partition 3 could form part of a removable unit (indicated by a dotted line in FIG. 1), so that the timers could be mounted separately and be fitted in boxes on which the contacts had already been mounted.
  • An open-circuit pneumatic timer comprising, housed in a box having a wall, a bellows and spring means mounted inside said bellows for effecting expansion of the inside volume of said bellows, a timing unit mounted outside the box in proximity to said wall and provided with a throttling channel, an opening in said wall for connecting the inside volume of the bellows to the throttling channel, rotary means, mounted in contact with the timing unit, for adjusting the effective length of the throttling channel, said rotary means being in the form of a circular cupel having a bottom and an open part, an air filter mounted in the open part of said cupel, the bellows having frontal surface engaging said wall, the front surface of the bellows, said wall, the timing unit and the bottom of the rotary means being provided with openings, a rod member coaxial to the bellows mounted through said openings and having one end portion within the cupel, spring means mounted about said end portion and engaging the bottom of the cupel for securing together the said cupel the timing unit

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
US00222819A 1971-02-08 1972-02-02 Pneumatic timer Expired - Lifetime US3797616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7104132A FR2124123B1 (fr) 1971-02-08 1971-02-08

Publications (1)

Publication Number Publication Date
US3797616A true US3797616A (en) 1974-03-19

Family

ID=9071528

Family Applications (1)

Application Number Title Priority Date Filing Date
US00222819A Expired - Lifetime US3797616A (en) 1971-02-08 1972-02-02 Pneumatic timer

Country Status (18)

Country Link
US (1) US3797616A (fr)
BE (1) BE778670A (fr)
BR (1) BR7200694D0 (fr)
CA (1) CA951362A (fr)
CH (1) CH541863A (fr)
CS (1) CS152261B2 (fr)
DD (1) DD97037A5 (fr)
DE (1) DE2204667A1 (fr)
DK (1) DK126285B (fr)
ES (1) ES399582A1 (fr)
FR (1) FR2124123B1 (fr)
GB (1) GB1378186A (fr)
HU (1) HU165852B (fr)
IT (1) IT947348B (fr)
LU (1) LU64735A1 (fr)
NL (1) NL7201518A (fr)
NO (1) NO130962C (fr)
SE (1) SE371532B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916130A (en) * 1974-03-29 1975-10-28 Houdaille Industries Inc Pressure switch for a sump pump
DE2914720A1 (de) * 1978-04-12 1979-10-18 Allen Bradley Co Zeitverzoegert arbeitender schalterbetaetigungsmechanismus
US4655313A (en) * 1985-08-26 1987-04-07 Outboard Marine Corporation Vehicle seat switch
US5343444A (en) * 1992-03-25 1994-08-30 Agut, S.A. Pneumatic timer
CN103998995A (zh) * 2011-12-08 2014-08-20 普雷斯弗雷克斯股份公司 低体积精密波纹管

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2915754A1 (de) * 1979-04-19 1980-10-30 Kloeckner Moeller Elektrizit Pneumatisches zeitwerk mit mindestens zwei zeitbereichen
DE3119089C2 (de) * 1981-05-14 1983-02-10 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Pneumatisches Zeitglied
DE3129663A1 (de) * 1981-07-28 1983-02-17 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Pneumatisches verzoegerungsrelais
DE10000731B4 (de) * 2000-01-11 2005-05-25 Itw-Ateco Gmbh Luftdämpfer für beweglich gelagerte Teile, insbesondere in Automobilen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645285A (en) * 1949-04-26 1953-07-14 Square D Co Timer
US2662594A (en) * 1952-03-24 1953-12-15 Square D Co Time delay relay
US2855481A (en) * 1954-10-14 1958-10-07 Elastic Stop Nut Corp Time delay apparatus
US3178524A (en) * 1962-04-20 1965-04-13 Bliss E W Co Pneumatically timed electric switch arrangement
US3213333A (en) * 1963-06-28 1965-10-19 Westinghouse Electric Corp Time delay control device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1483795A (fr) * 1966-03-11 1967-06-09 Telemecanique Electrique Dispositif temporisé de commande de contacts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645285A (en) * 1949-04-26 1953-07-14 Square D Co Timer
US2662594A (en) * 1952-03-24 1953-12-15 Square D Co Time delay relay
US2855481A (en) * 1954-10-14 1958-10-07 Elastic Stop Nut Corp Time delay apparatus
US3178524A (en) * 1962-04-20 1965-04-13 Bliss E W Co Pneumatically timed electric switch arrangement
US3213333A (en) * 1963-06-28 1965-10-19 Westinghouse Electric Corp Time delay control device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916130A (en) * 1974-03-29 1975-10-28 Houdaille Industries Inc Pressure switch for a sump pump
DE2914720A1 (de) * 1978-04-12 1979-10-18 Allen Bradley Co Zeitverzoegert arbeitender schalterbetaetigungsmechanismus
US4181829A (en) * 1978-04-12 1980-01-01 Allen-Bradley Company Time delay switch actuating mechanism
US4655313A (en) * 1985-08-26 1987-04-07 Outboard Marine Corporation Vehicle seat switch
US5343444A (en) * 1992-03-25 1994-08-30 Agut, S.A. Pneumatic timer
CN103998995A (zh) * 2011-12-08 2014-08-20 普雷斯弗雷克斯股份公司 低体积精密波纹管
CN103998995B (zh) * 2011-12-08 2016-12-28 普雷斯弗雷克斯股份公司 低体积精密波纹管

Also Published As

Publication number Publication date
SE371532B (fr) 1974-11-18
LU64735A1 (fr) 1972-07-03
FR2124123A1 (fr) 1972-09-22
FR2124123B1 (fr) 1975-07-04
BR7200694D0 (pt) 1973-06-28
CS152261B2 (fr) 1973-12-19
IT947348B (it) 1973-05-21
NO130962B (fr) 1974-12-02
NO130962C (fr) 1975-03-12
NL7201518A (fr) 1972-08-10
DD97037A5 (fr) 1973-04-12
BE778670A (fr) 1972-05-16
CH541863A (fr) 1973-09-15
CA951362A (en) 1974-07-16
HU165852B (fr) 1974-11-28
ES399582A1 (es) 1974-11-01
DE2204667A1 (de) 1972-08-24
DK126285B (da) 1973-06-25
GB1378186A (en) 1974-12-27

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