US3483436A - Voltage compensated series flasher circuit - Google Patents

Voltage compensated series flasher circuit Download PDF

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Publication number
US3483436A
US3483436A US3483436DA US3483436A US 3483436 A US3483436 A US 3483436A US 3483436D A US3483436D A US 3483436DA US 3483436 A US3483436 A US 3483436A
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US
United States
Prior art keywords
flasher
ribbon
pull
blade
llasher
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
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English (en)
Inventor
Hemming G Siiberg
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Cooper Industries LLC
Original Assignee
Wagner Electric Corp
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Publication date
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Publication of US3483436A publication Critical patent/US3483436A/en
Assigned to STUDEBAKER-WORTHINGTON, INC. reassignment STUDEBAKER-WORTHINGTON, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WAGNER ELECTRIC CORPORATION
Assigned to EDISON INTERNATONAL, INC. reassignment EDISON INTERNATONAL, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: STUDEBAKER-WORTHINGTON, INC., A CORP. OF DE
Assigned to COOPER INDUSTRIES, INC., 1001 FANNIN, HOUSTON, TEXAS 77002, A CORP. OF reassignment COOPER INDUSTRIES, INC., 1001 FANNIN, HOUSTON, TEXAS 77002, A CORP. OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EDISON INTERNATIONAL, INC., A CORP. OF DE.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B60Q1/34—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 change of drive direction
    • B60Q1/38—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 change of drive direction using immovably-mounted light sources, e.g. fixed flashing lamps
    • B60Q1/387—Mechanical temporisation

Definitions

  • the present invention achieves a voltage compensation within the normal range of lluctuation of a l2 volt automotive system, viz. from ll to volts (D.C.). Such voltage compensation results in a constant ON time and a constant flashing rate.
  • FIG. l is a schematic drawing of a preferred embodiment of the invention.
  • FIG. 2 shows the relationship between lamp current and llasher ON time for three values of applied voltage, with superimposed energization and de-energization levels of the magnetic relay.
  • FIG. 3 shows the voltage drop across the pull ribbon of a series llasher for the same three values of applied voltage as a function of flasher ON time with voltage compensation and without voltage compensation.
  • FIGS. 4 and 5 show the dellecting member of the llasher preferred for utilization in the present invention.
  • FIG. 6 shows the deilecting member-pull ribbon assembly of the llasher preferred for utilization in the present invention.
  • FIGS. 7, 8, 9 and l0 diagrammatically show the dellecting member-pull ribbon assembly of FIG. 6 associated with the other cooperative parts of the flasher at various times during the operating cycle of the llasher.
  • terminal 10 connects the winding 12 of relay 14 in series with a power source 15.
  • Winding 12 is connected to armature 16 and to a terminal of llasher 18.
  • the relay 14 further comprises contacts 20, which, when closed, establish a shunt path around flasher ice 18.
  • Armature 16 is spring loaded by adjustable spring 22 connected to the frame 24.
  • Core 26 serves to concentrate magnetic flux resulting from current passing through winding 12.
  • Series llasher 18 is connected through switch 28 to lamp load 30 and then to ground 32.
  • the operation of the circuit may be best understood by a brief explanation of the initial circuit conditions upon closing of switch 28 with the relay 14 eliminated and substituted by an assumed direct connection between terminal 10 and llasher 18 as is used in conventional series-connected llasher circuits.
  • a surge current ⁇ of a magnitude of approximately five to seven times that of the steady state lamp load current would be produced when switch 28 is closed, due to the nonlinear resistance characteristic of the lamp load.
  • This surge current which is caused primarily by the low initial resistance of lamp load 30, has a duration of between to 200 milliseconds, depending upon the characteristics of the lamp filament, and remains fairly constant for a range of applied voltages from 11 to 15 volts.
  • the present invention introduces a variable time delay between the closing of switch 28 and the full energization of yseries llasher 18, so as to delay the opening of the series llasher contacts and thereby maintain a constant ON time, regardless of applied voltage.
  • this variable time delay is provided by the relay 14 which is adjusted so as to cause contacts 20 to close below the peak surge current produced by the lowest value of applied voltage encountered in the circuit.
  • the de-energization current level of relay 14 is set at a specific current level higher than the highest steady state lamp current, which will result in a variable time delay during which the llasher is shunted, thereby producing a constant ON time.
  • the effect of the adjustment of the de-energization level of relay 14 is illustrated in the 4graph of FIG. 2, which shows the levels at which the relay is under-compensated, fully-compensated, or over-compensated.
  • the relay 14 may be adjusted by varying the tension of the spring 22 or the width of the gap between the contacts 20.
  • Heating of the pull ribbon of the llasher will become greatly accelerated by this increase in current and, after the pull ribbon has relaxed sullciently, the contacts of the llasher 18 will open.
  • a large surge current will again pass through the winding 12 and the aforementioned cycle will continue to repeat itself as long as switch 28 remains closed.
  • the blade 10 has a rectangular portion 12 and a tapered portion 14.
  • the rectangular portion 12 has a tab 16 to facilitate the mounting of the pull ribbon.
  • the narrow tip of the tapered portion 14 serves the sarne function.
  • a deformation 18 extends along an axis in the central region of the blade and is made after the formation of the cutout area 20 which produces the tongue 22.
  • the blade is made of a conducting spring material such as steel, duranickel, or the like.
  • a preferred range of the included angle formed by the rectangular and tapered portions after the deformation has been made is from approximately 160 to 170, although angles outside of this range may also used.
  • the two portions of the blade on either side of the deformation 18 are bowed reversely to the direction of bend of the deformation by attaching a pull ribbon 24 under tension to the blade as shown in FIG. 6.
  • the function of the cutout is to permit the pull ribbon 24 to pass just below the crest of the deformation in the blade 10.
  • Contact 26 is mounted on the pull ribbon 24 in proximity to the deformation 18 of the blade 10.
  • the contact 26 is preferably centrally located on the pull ribbon 24 so as to provide the maximum rate of heating of the pull ribbon, which results in faster starting of the flasher.
  • the pull ribbon 24 is preferably welded to the blade 10 at points 16 and 28, which form convenient tabs for mounting. Tab 28 is simply the tip of the tapered portion 14 of the blade 10.
  • FIG. 7 illustrates the pull ribbon-blade member assembly of FIG. 6 diagrammatically associated with other parts in an operative flasher mechanism which is in a cold position.
  • the blade 10 is attached to a mount 34 which is electrically connected to terminal 37 and electrically insulated from a supporting frame 36.
  • Terminal 37 is in turn connected to a lamp load 38 which 1s grounded at 40.
  • the movable contact 26 is engaged with a stationary contact 32 which is electrically connected to terminal 33 and electrically insulated from frame 36.
  • Terminal 33 is in turn connected through an on-off switch 31 to a source of electric current 30, such as an automobile battery.
  • the stop 42 for the free end of the blade 10 is mounted on the frame 36 and the function of the stop will be explained in greater detail below.
  • a voltage-compensated flasher circuit comprising:
  • a voltage-compensated flasher circuit wherein said armature is mechanically biased by adjustable spring means so as to hold said rst and second contacts open when the current flowing through said winding is below the relay energization thershold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Traffic Control Systems (AREA)
US3483436D 1967-08-21 1967-08-21 Voltage compensated series flasher circuit Expired - Lifetime US3483436A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66202567A 1967-08-21 1967-08-21

Publications (1)

Publication Number Publication Date
US3483436A true US3483436A (en) 1969-12-09

Family

ID=24656069

Family Applications (1)

Application Number Title Priority Date Filing Date
US3483436D Expired - Lifetime US3483436A (en) 1967-08-21 1967-08-21 Voltage compensated series flasher circuit

Country Status (4)

Country Link
US (1) US3483436A (fr)
DE (1) DE1766952B1 (fr)
FR (1) FR1579177A (fr)
GB (1) GB1190168A (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302057A (en) * 1964-10-20 1967-01-31 Tung Sol Electric Inc Flasher for directional and emergency signals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1002639B (de) * 1954-07-29 1957-02-14 Westfaelische Metall Industrie Anordnung zur Abgabe von intermittierenden Lichtzeichen fuer Signalzwecke bei Kraftfahrzeugen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302057A (en) * 1964-10-20 1967-01-31 Tung Sol Electric Inc Flasher for directional and emergency signals

Also Published As

Publication number Publication date
FR1579177A (fr) 1969-08-22
DE1766952B1 (de) 1970-09-24
GB1190168A (en) 1970-04-29

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Legal Events

Date Code Title Description
AS Assignment

Owner name: STUDEBAKER-WORTHINGTON, INC., ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WAGNER ELECTRIC CORPORATION;REEL/FRAME:003984/0757

Effective date: 19801229

AS Assignment

Owner name: COOPER INDUSTRIES, INC., 1001 FANNIN, HOUSTON, TEX

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EDISON INTERNATIONAL, INC., A CORP. OF DE.;REEL/FRAME:004475/0382

Effective date: 19851031