US3663904A - Electro-mechanical control apparatus - Google Patents

Electro-mechanical control apparatus Download PDF

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Publication number
US3663904A
US3663904A US92042A US3663904DA US3663904A US 3663904 A US3663904 A US 3663904A US 92042 A US92042 A US 92042A US 3663904D A US3663904D A US 3663904DA US 3663904 A US3663904 A US 3663904A
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US
United States
Prior art keywords
projections
control means
electromagnets
conductors
block
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
US92042A
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English (en)
Inventor
Alec John Heap
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3663904A publication Critical patent/US3663904A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/02—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling being chokes for enriching fuel-air mixture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents

Definitions

  • a control apparatus of the foregoing type comprises a body, control means slidable in the body and having a series of projections thereon, a pair of electromagnets, a pair of latching members operable by the electromagnets respectively and engageable with the projections to provide a restraint for the control means, and switching means operable by the control means so as to render the electromagnets alternately energizable, the arrangement being such that, in the absence of any other restraint, movement of one latch member out of engagement with a projection permits the control means tomove under the influence of a biasing force to a position in which the other latch member is engaged with a projection, whereby the control means is moved in a step-by-step manner.
  • FIG. 1 is a part section through a control apparatus
  • FIGS. 2, 3 and 4 are sections on the corresponding lines in FIG. 1,
  • FIG. 5 is a part section through an alternative form of control apparatus
  • FIG. 6 is a view, with parts removed for clarity, on arrow 6 in FIG. 5,
  • FIG. 7 is a view of a detail of the apparatus shown in FIG. 5,
  • FIG. 8 is a section through a further alternative form of apparatus, g
  • FIG. 9 is a view, with parts removed for clarity, on arrow 9 in FIG. 8, and
  • FIG. 10 is a section on line Ill-10 of a part of the apparatus.
  • a control means in the form of a block 10 is slidable within a body 11 comprising a base 12 and a cover 13.
  • a first stem 14, is supported in the body 11 and secured to the block 10.
  • a second stem is also supported by the body 11 and is slidable within the block 10.
  • the stem 14 is coupled to an external apparatus (not shown) which includes an element whose linear movement is to be controlled, and which may also include the aforementioned biasing means for the stem 14.
  • Operation of the apparatus is initiated by moving the block 10 to the left, as seen in FIG. 1, by means of the stem 15, to a position in which the latch member 24 engages the projection 19 farthest from the stem 14.
  • contact member 36 provides a connection between the conductors 27, 28.
  • a voltage applied to conductor 28 will thus energize the electromagnet and permit the block 10 and stems 14, 15 to move until the latch member engages the next adjacent spring 16 is engaged between a face 17 on-the block 10 and a circlip 18 located on the stem 15.
  • the block 10 is formed with two parallel rows of projections 19, the projections in one row being in a staggered relationship with those in the other row, as shown in FIG. 1.
  • a pair of electromagnets 20, 21 have associated spring-loaded armatures 22, 23 carrying latch members 24, 25 each of which is engageable withthe projections 19 in a respective one of the rows.
  • An extemal' biasing means urges the stem 14 to the right as shown in FIG. 1.
  • the base 12 is formed of a printed circuit board having formed thereon a pattern of conductors 26 to 34 inclusive as shown. Conductors 28 to 34 are each connected to a terminal 35 having a portion extending outwardly of the body 11. Electrical connections to the electromagnets 20, 21 are made respectively to conductors 26, 34 and 27, 34. Secured to the underside of the block 10 are a pair of identical resiliently deformable contact members 36, 37 respectively arranged to provide an electrical contact between conductors 26, 27 and their adjacent conductors 28 to 32 inclusive. Also securedto the underside of the block 10 are three identical resiliently deformable contact members 38, each having an upturned tongue 39 and a portion in contact with a respective one of the conductors 26, 27, 33,. The stem 15 carries a metal ferrule 41 which may be urged into simultaneous contact with all the contact member 38 by movement of the stem 15 against the spring 16.
  • conductor 34 is connected, via its terminal 35, to an earth potential.
  • Conductors 28 to 32 inclusive are connected,
  • both electromagnets 20, 21 are simultaneously energized by the voltage on the conductor 33.
  • the block 10 and stem 14 are thus urged by the stem and by the external biasing means to the full extent of their permitted movement.
  • An apparatus as described is particularly applicable to the control of a choke on an internal combustionengine, the full withdrawn position of the stem 15 corresponding to maximum choke," and the sequential electrical signals being derived from the engine by means of switches which close at predetermined levels of temperature.
  • control apparatus shown in FIGS. 5 to 7 is generally the same as that shown and described with reference to FIGS. 1 and 4, and includes a block 10, first and second stems 14, Hand a spring 16, as before.
  • the block 10 and stems 14, 15 are slidable in a body 40 which supports a pair ofelectromagnets 41 which are in spaced parallel'relation and whose axes are'perpendicular to the axes of the stems l4, 15.
  • the electromagnets 41 have spring-loaded armatures 42 which form latches engageable with projections 19 on the block 10.
  • the block 10 carries three identical resiliently deformable contact members 54 which correspond to the contact member 38 in the first described embodiment and which engage the conductors 45, 46, 53.
  • the block also carries a pair of contact assemblies 55 which respectively and sequentially provide an electrical contact between conductors 45, 46 and their adjacent conductors 47 to 51 inclusive.
  • Each contact assembly 55 includes a resiliently deformable yoke 56 with a pair of parallel flanges 57.
  • Rotatably mounted between the flanges 57 is a roller member 58 having portions 59 of increased diameter adjacent its ends. The portions 59 respectively engage the conductors 45, 46 and the conductors 47 to 51.
  • control means comprises a contact carrier 60 engaged with the stem 14 and an element 61 mounted within the carrier 60 for sliding movement in a direction perpendicular to the axis of the stem 14.
  • Element 61 is formed with a pair of projections .62 which engage corresponding grooves in the carrier 60 and is biased upwardly of the carrier 60, as shown in FIG. 8, by four compression springs 63 which engage bores 64.
  • Element 61 has two parallel rows of staggered projections 65, as previously described.
  • Element 61 also has a central slot 66 formed with a ramp 67 adapted to be engaged by the generally conical end of stem 68.
  • Stem 68 is similar to the stem previously described but does not include a conductive portion at its end.
  • Stem 68 is biased away from engagement with the ramp 67 by a spring 69.
  • a pair of electromagnets 70 have axial armatures 71 which provide latching means for the projections 61 in the respective rows.
  • Contacts 72 are engageable with suitable conductor patterns on a printed circuit board 73.
  • An electro-mechanical control apparatus for providing a step-by-step movement in response to a sequence of electrical signals, comprising a body, control means slidable in the body and having a series of projections thereon, a pair of electromagnets, a pair of latching members operable by the electromagnets respectively and engageable with the projections to provide a restraint for the control means, and switching means operable by the control means so as to render the electromagnets alternately energizable, the arrangement being such that, in the absence of any other restraint, movement of one latch member out of engagement with a projection permits the control means to move under the influence of a biasing force to a position in which the other latch member is engaged with a projection, whereby the control means is moved in a step-by-step manner.
  • switching means comprises an arrangement of conductors on the body and a plurality of contacts on the control means selectively engageable with the said conductors.
  • over-ride means includes an actuating member operable to urge the control means in the direction of said step-by-step movement.
  • over-ride means includes further switch means for simultaneously energizing both electromagnets.
  • control means includes an element upon which said projections are formed and biasing means urging said element towards said latching members, the said element having a portion engageable by the actuating member so that operation of the latter urges said element away from engagement with said latch members.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnets (AREA)
  • Control Of Position Or Direction (AREA)
  • Valve Device For Special Equipments (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Seats For Vehicles (AREA)
US92042A 1969-12-18 1970-11-23 Electro-mechanical control apparatus Expired - Lifetime US3663904A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6164269 1969-12-18

Publications (1)

Publication Number Publication Date
US3663904A true US3663904A (en) 1972-05-16

Family

ID=10487269

Family Applications (1)

Application Number Title Priority Date Filing Date
US92042A Expired - Lifetime US3663904A (en) 1969-12-18 1970-11-23 Electro-mechanical control apparatus

Country Status (8)

Country Link
US (1) US3663904A (en))
AU (1) AU2217670A (en))
CS (1) CS149945B2 (en))
DE (1) DE2061871C3 (en))
ES (1) ES386147A1 (en))
FR (1) FR2070914B1 (en))
GB (1) GB1321819A (en))
SE (1) SE360706B (en))

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658123A (en) * 1950-09-14 1953-11-03 Lectromatic Devices Inc Holding relay
US3144226A (en) * 1959-02-06 1964-08-11 William G Noble Self-locking switch motor
US3158766A (en) * 1962-04-30 1964-11-24 Westinghouse Electric Corp Gripper type linear motion device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050943A (en) * 1957-04-29 1962-08-28 Westinghouse Electric Corp Linear driving mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658123A (en) * 1950-09-14 1953-11-03 Lectromatic Devices Inc Holding relay
US3144226A (en) * 1959-02-06 1964-08-11 William G Noble Self-locking switch motor
US3158766A (en) * 1962-04-30 1964-11-24 Westinghouse Electric Corp Gripper type linear motion device

Also Published As

Publication number Publication date
CS149945B2 (en)) 1973-08-23
DE2061871C3 (de) 1975-01-02
DE2061871A1 (de) 1971-06-24
ES386147A1 (es) 1973-12-16
FR2070914A1 (en)) 1971-09-17
DE2061871B2 (de) 1974-05-22
SE360706B (en)) 1973-10-01
FR2070914B1 (en)) 1974-03-22
GB1321819A (en) 1973-07-04
AU2217670A (en) 1972-05-18

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