GB1391406A - Variable intensity illumination apparatus - Google Patents

Variable intensity illumination apparatus

Info

Publication number
GB1391406A
GB1391406A GB2780573A GB2780573A GB1391406A GB 1391406 A GB1391406 A GB 1391406A GB 2780573 A GB2780573 A GB 2780573A GB 2780573 A GB2780573 A GB 2780573A GB 1391406 A GB1391406 A GB 1391406A
Authority
GB
United Kingdom
Prior art keywords
multivibrator
lamp
pulses
duration
astable
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
Application number
GB2780573A
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.)
Sperry Corp
Original Assignee
Sperry Rand Corp
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 Sperry Rand Corp filed Critical Sperry Rand Corp
Publication of GB1391406A publication Critical patent/GB1391406A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B45/00—Arrangements or adaptations of signalling or lighting devices
    • B63B45/06—Arrangements or adaptations of signalling or lighting devices the devices being intended to illuminate vessels' decks or interior
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
    • H03K3/03—Astable circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B45/00—Arrangements or adaptations of signalling or lighting devices
    • B63B2045/005—Arrangements or adaptations of signalling or lighting devices comprising particular electric circuits

Abstract

1391406 Lamp brightness control circuits SPERRY RAND CORP 12 June 1973 [29 June 1972] 27805/73 Heading H2H Variable intensity illumination apparatus comprises a lamp 49, a monostable multivibrator 35 and an astable multivibrator 33 coupled to drive the monostable multivibrator from a stable state into a quasi-stable state in response to a selected edge of the astable multivibrator output pulses. The brightness of the lamp may be increased by moving the adjustable arm of a potentiometer 53 towards the right thereby increasing and decreasing the series resistance of the resistance-capacitance networks of the multivibrators 33 and 35 respectively. This movement reduces both the pulse repetition frequency of the multivibrator 33 and the duration of the output pulses of the multivibrator 35. The trailing edges of the pulses from the multivibrator 33 trigger the multivibrator 35 and the output pulses from the complementary output terminal Q of the multivibrator 35 have an increased duration so that the lamp is bright. Opposite movement of the potentiometer arm reduces the duration of the pulses supplied to the lamp and the lamp is therefore dimmed. The multivibrators are formed as an integrated circuit and the leading edge of the astable multivibrator pulses may be used to trigger the monostable multivibrator.
GB2780573A 1972-06-29 1973-06-12 Variable intensity illumination apparatus Expired GB1391406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00267342A US3821600A (en) 1972-06-29 1972-06-29 Variable intensity illuminator

Publications (1)

Publication Number Publication Date
GB1391406A true GB1391406A (en) 1975-04-23

Family

ID=23018394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2780573A Expired GB1391406A (en) 1972-06-29 1973-06-12 Variable intensity illumination apparatus

Country Status (10)

Country Link
US (1) US3821600A (en)
JP (1) JPS5225031B2 (en)
CA (1) CA991258A (en)
DE (1) DE2333287A1 (en)
ES (1) ES416388A1 (en)
FR (1) FR2191397B1 (en)
GB (1) GB1391406A (en)
IT (1) IT986171B (en)
NL (1) NL7309029A (en)
SE (1) SE386049B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5156746U (en) * 1974-10-28 1976-05-04
JPS5156747U (en) * 1974-10-28 1976-05-04
US3979580A (en) * 1975-04-15 1976-09-07 The United States Of America As Represented By The Secretary Of The Navy Function selector
US4238709A (en) * 1978-07-05 1980-12-09 Wallace John M Head lamp control circuit
JPS5837484B2 (en) * 1979-09-25 1983-08-16 日産自動車株式会社 Automotive electronic meter brightness control device
SE441563B (en) * 1980-04-09 1985-10-14 Selfrid Gunnar Ohlund CONTROL DEVICE FOR A CONVERSION POWER VALVE FOR OPERATION OF A GAS EMISSION PIPE FROM A DIRECTION SHELL
DE3417194A1 (en) * 1984-05-09 1985-11-14 TRW Messmer GmbH & Co KG, 7760 Radolfzell CIRCUIT ARRANGEMENT FOR CONTROLLING THE PERFORMANCE OF A DC-POWERED CONSUMER, IN PARTICULAR FOR THE INSTRUMENT LIGHTING OF A MOTOR VEHICLE
DE3611724A1 (en) * 1986-04-08 1987-10-22 Bbc Brown Boveri & Cie Brightness controller having a direct-current supply
US6870329B2 (en) 2002-04-26 2005-03-22 Vector Products, Inc. PWM controller with automatic low battery power reduction circuit and lighting device incorporating the controller
US6770853B2 (en) 2002-10-22 2004-08-03 Vector Products, Inc. PWM controller for DC powered heating blanket

Also Published As

Publication number Publication date
NL7309029A (en) 1974-01-02
SE386049B (en) 1976-07-26
ES416388A1 (en) 1976-02-16
CA991258A (en) 1976-06-15
JPS5225031B2 (en) 1977-07-05
US3821600A (en) 1974-06-28
JPS4951776A (en) 1974-05-20
DE2333287A1 (en) 1974-01-10
FR2191397A1 (en) 1974-02-01
FR2191397B1 (en) 1978-01-06
IT986171B (en) 1975-01-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee