US3299234A - Velocity responsive actuating means - Google Patents

Velocity responsive actuating means Download PDF

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Publication number
US3299234A
US3299234A US461906A US46190665A US3299234A US 3299234 A US3299234 A US 3299234A US 461906 A US461906 A US 461906A US 46190665 A US46190665 A US 46190665A US 3299234 A US3299234 A US 3299234A
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US
United States
Prior art keywords
blade
contacts
velocity
actuating means
rotating member
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
US461906A
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English (en)
Inventor
Castelet Gaetan De Coye De
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.)
Renault SAS
Regie Nationale des Usines Renault
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Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
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Publication of US3299234A publication Critical patent/US3299234A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
    • B60Q1/54—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking for indicating speed outside of the vehicle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H01H3/56—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using electromagnetic clutch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/06—Switches operated by change of speed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/06—Switches operated by change of speed
    • H01H35/10—Centrifugal switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs

Definitions

  • VELOCITY RESPONSIVE ACTUATING MEANS Filed June 7, 1965 Invenar GAG kart Decoye De CaSlG/QZ RH-ornu/s United States Patent VELGCITY RESPONSIVE ACTUATING MEANS Gatan de Coye de Castelet, Billancourt, France, assignor to Regie Nationale des Usines Renault, Billancourt,
  • Tachometric contactors are already known wherein the contact making and breaking members consist of flexible metal blades having substantially an S-shaped curvature, these blades being disposed between end bearings and adapted to either abruptly engage or snappily move away from contacts by undergoing a slight deformation under the influence of a member providing to this end a static effort as a function of the velocity of motion of a movable body or unit.
  • a contactor of this general type is disclosed in the French Patent No. 1,271,126 of July 25, 1960 in the name of Etablatoriums Ed. Jaeger and entiled Tachometric Contactor.
  • the member producing said static effort is a magnet revolving within a metal bell-shaped member which it tends to carry along, by means of the eddy currents induced therein, against the resistance of spring means of which the degree of elongation determines the engagement of each S-shaped blade against one or the other of its contacts.
  • the limit torque values of said bell-shaped member which control the contact changes of each blade (and therefore the limit speeds of the rotating magnet) diifer according to which of the contacts said blade is to separate from, and the values of these limit torques may be adjusted by varying the position of the anchor point of the spring concerned.
  • a contactor of this character may advantageously be used for controlling gear changes in an automotive vehicle.
  • the limit torque adjustment may be made responsive to the means controlling the engine power output.
  • T achometric contactor control devices are also known wherein the control action by magnet or metal bell is adjustable by altering the relative axial spacing of the magnet and bell, as disclosed in the patent application Ser. No. 439,285 filed on Mar. 12, 1965 by the same applicant.
  • This member may be for example an electromagnet, a hydraulic or pneumatic cylinder, or even a simple mechanical linkage associating the positions of said contacts with the position of said pedal.
  • FIGURE 1 is an axial section showing a device for producing a static torque by using a rotary magnet and a metal bell-shaped member;
  • FIGURE 2 is a diagram showing a typical mounting of an S-shaped blade
  • FIGURE 3 is another diagram showing a typical adjustment of the contacts of an S-shaped blade
  • FIGURE 4 is a modified form of embodiment of the preceding mounting
  • FIGURE 5 is a diagram showing a two-blade contactor.
  • a contactor comprises essentially in a same casing a tachometric control member, a number of switches of the S-shaped blade type, and means for adjusting the contacts of said switches.
  • the tachometric control member may consist for example of a permanent magnet A mounted in a bearing rigid with the casing G and revolving within a hell-shaped metal member C.
  • the magnet A is rotatably driven through a flexible cable F from the power take off provided for example on the output shaft of the transmission of an automotive vehicle.
  • This magnet revolves in a metal bell C and tends to carry along this bell by introducing eddy currents into it, this bell being on the other hand retained by a torsion or like spring r attached to a bar P.
  • a switch unit (see FIGURE 2) comprises an S-shaped blade S clamped between two end bearings K, K and adapted to engage one or the other of a pair of contacts B and B.
  • the blade S moves snappily from one to the other of these contacts as a consequence of the deformation of the blade S responsive to the bar P.
  • the blade S is attached at X on the one hand to said bar P through a connecting rod, and on the other hand to a traction spring R counteracting the pulling of this blade S by the bar P.
  • the bar P tends to elongate the spring R by moving the blade S from its position shown in full lines in the figure to a position S shown in dash lines.
  • the present invention provides means for adjusting the position of at least one of contacts B and B.
  • FIGURE 3 it is the front contact B that is made movable by mounting sameon an arm I rigid' with a lever L fulcrumed on a pivot pin Y.
  • the travel of lever L is limited by stop H.
  • the lever L consists of magnetic material and constitutes the armature of an elect-romagnet E having its coil energized from a source of current U through a control member V.
  • This control member V may be a simple ON-OFF switch, or a known device for the continuous adjustment of the energizing current fed to B (such as a rheostat or a variable inductance).
  • This member may be actuated for example by depressing the accelerator pedal by mean of a rod D.
  • the front contact B is mounted on an elastic rod J adapted to be deflected by a stop B carried by'a lever i.
  • a tachometric contactor according to this invention may be used for controlling gear changes in an automotive vehicle.
  • the two-blade device shown in FIGURE comprises a single tachometric control member of which the bar -P is adapted to tension both springs R and R simultaneously.
  • the first blade S may be used, for example, for controlling up and down gear shifts between low speed and intermediate speed, blade S controlling up and down gear shifts between intermediate speed and top speed.
  • Contact B of blade S is shown with the adjustment means of FIGURE 4, and contact B' of blade S corresponds to the mounting of FIGURE 3.
  • the change-speed relay RA shown in FIGURE 5 is responsive to the back contact B this arrangement being preferred in practice because it avoids the passage of current through the movable lever L
  • the member V controlling blade S is actuated in conjunction with the control member V of S
  • These control members may be responsive for example to the accelerator pedal beyond its normal stroke after clearing a mechanical resistance.
  • a velocity responsive actuating means for use in the gear shift control means of, for example, an automotive vehicle which includes an engine and an accelerator pedal for controlling the velocity output thereof, said means comprising: a, rotating member, an actuating means which is movable in response to the velocity of said rotating member, a switch means comprising a flexible S-shaped metal blade flexibly snapable to either side of a neutral axis, said blade being mounted at its ends in fixed bearings, a contact on each side of said blade at a location intermediate its ends, said actuating means being connected to said blade and urging it towards one of said contacts, a yieldable means urging said blade towards the other of said contacts, said blade resting against one or the other of said contacts depending upon the velocity of said rotating member and the consequent force exerted by said velocity responsive actuating means upon said blade, and adjustment means actuable by said accelerator pedal to adjustably move one of said contacts laterally relative to said blade.
  • adjustment means comprises a pivoted lever, said one of said contacts being movable in response to pivoting of said pivoted lever, means to adjustably pivot said lever.
  • the energizing circuit of said electromagnet including a means to vary the energizing current to said electromagnet.
  • the tachometric contactor or claim 3 adapted for use in an automotive gear shift having three gear shift ratios, said contactor comprising two of said S-shaped blades and a single said actuating means connected to both said blades, one of said blades and its associated said contacts being associated with a first and second of said gear ratios and the other of said blades being associated with the second and third of said gear ratios.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Control Devices (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Control Of Transmission Device (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
US461906A 1964-07-22 1965-06-07 Velocity responsive actuating means Expired - Lifetime US3299234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR982641A FR1409877A (fr) 1964-07-22 1964-07-22 Perfectionnements aux contacteurs tachymétriques

Publications (1)

Publication Number Publication Date
US3299234A true US3299234A (en) 1967-01-17

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ID=8835130

Family Applications (1)

Application Number Title Priority Date Filing Date
US461906A Expired - Lifetime US3299234A (en) 1964-07-22 1965-06-07 Velocity responsive actuating means

Country Status (6)

Country Link
US (1) US3299234A (fr)
BE (1) BE664418A (fr)
DE (1) DE1540332B1 (fr)
ES (1) ES314649A1 (fr)
FR (1) FR1409877A (fr)
GB (1) GB1108364A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374693A (en) * 1964-11-17 1968-03-26 Renault Automatic speed-changing mechanism for automobile vehicles
FR2201461A1 (fr) * 1972-09-29 1974-04-26 Guardian Industries

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1668974A (en) * 1926-03-12 1928-05-08 Westinghouse Electric & Mfg Co Snap switch
US2501497A (en) * 1947-10-07 1950-03-21 Gen Electric Column spring snap switch
US2512306A (en) * 1947-11-07 1950-06-20 Gen Electric Column spring switch
US2880288A (en) * 1955-05-09 1959-03-31 Gaylord Prod Inc Speedometer switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1271126A (fr) * 1960-07-25 1961-09-08 Jaeger Ets Ed Contacteur tachymétrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1668974A (en) * 1926-03-12 1928-05-08 Westinghouse Electric & Mfg Co Snap switch
US2501497A (en) * 1947-10-07 1950-03-21 Gen Electric Column spring snap switch
US2512306A (en) * 1947-11-07 1950-06-20 Gen Electric Column spring switch
US2880288A (en) * 1955-05-09 1959-03-31 Gaylord Prod Inc Speedometer switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374693A (en) * 1964-11-17 1968-03-26 Renault Automatic speed-changing mechanism for automobile vehicles
FR2201461A1 (fr) * 1972-09-29 1974-04-26 Guardian Industries
US3862386A (en) * 1972-09-29 1975-01-21 Guardian Industries Snap action type inertia switch with vibration amplication and actuator means

Also Published As

Publication number Publication date
ES314649A1 (es) 1965-10-01
DE1540332B1 (de) 1971-08-12
FR1409877A (fr) 1965-09-03
BE664418A (fr) 1965-09-16
GB1108364A (en) 1968-04-03

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