FR2296882A1 - Electronic pocket calculator with rechargeable battery - has adjustable resistance between battery and recharging circuit - Google Patents

Electronic pocket calculator with rechargeable battery - has adjustable resistance between battery and recharging circuit

Info

Publication number
FR2296882A1
FR2296882A1 FR7540274A FR7540274A FR2296882A1 FR 2296882 A1 FR2296882 A1 FR 2296882A1 FR 7540274 A FR7540274 A FR 7540274A FR 7540274 A FR7540274 A FR 7540274A FR 2296882 A1 FR2296882 A1 FR 2296882A1
Authority
FR
France
Prior art keywords
battery
recharging circuit
adjustable resistance
pocket calculator
rechargeable battery
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.)
Granted
Application number
FR7540274A
Other languages
French (fr)
Other versions
FR2296882B1 (en
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of FR2296882A1 publication Critical patent/FR2296882A1/en
Application granted granted Critical
Publication of FR2296882B1 publication Critical patent/FR2296882B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
    • G06F15/0216—Constructional details or arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The calculator housing contains a battery (28) for operating the calculation mechanism and display circuits (32, 12) and which can be recharged by connecting a recharging input to an external current source. A resistance is inserted between the recharging circuit (24, 26) and the battery (28), with an ON-OFF switch (14a) between the battery (28) and the calculation and display circuits (32, 12). A second switch contact (14B) is associated with the ON-OFF switch (14a), so that the resistance inserted between the recharging circuit (24, 26) and the battery (28) is dependent on the position of the ON-OFF switch (14a).
FR7540274A 1975-01-03 1975-12-31 Electronic pocket calculator with rechargeable battery - has adjustable resistance between battery and recharging circuit Granted FR2296882A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53849575A 1975-01-03 1975-01-03

Publications (2)

Publication Number Publication Date
FR2296882A1 true FR2296882A1 (en) 1976-07-30
FR2296882B1 FR2296882B1 (en) 1977-08-19

Family

ID=24147153

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7540274A Granted FR2296882A1 (en) 1975-01-03 1975-12-31 Electronic pocket calculator with rechargeable battery - has adjustable resistance between battery and recharging circuit

Country Status (4)

Country Link
AU (1) AU8777475A (en)
BR (1) BR7508626A (en)
DE (1) DE2555661A1 (en)
FR (1) FR2296882A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024268A1 (en) * 1979-08-10 1981-02-25 Sandvik Aktiebolag AC/DC source for portable motor driven devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU603550B2 (en) * 1985-09-26 1990-11-22 Lions Eye Institute Of Western Australia Incorporated, The Portable power supply

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344899A (en) * 1963-04-22 1967-10-03 Scm Corp Portable data transferring machines operable from either dc or ac current
US3539898A (en) * 1968-11-04 1970-11-10 Sperry Rand Corp Charging means for electrical appliance
FR2223876A1 (en) * 1973-03-30 1974-10-25 Texas Instruments Inc

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344899A (en) * 1963-04-22 1967-10-03 Scm Corp Portable data transferring machines operable from either dc or ac current
US3539898A (en) * 1968-11-04 1970-11-10 Sperry Rand Corp Charging means for electrical appliance
FR2223876A1 (en) * 1973-03-30 1974-10-25 Texas Instruments Inc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024268A1 (en) * 1979-08-10 1981-02-25 Sandvik Aktiebolag AC/DC source for portable motor driven devices

Also Published As

Publication number Publication date
FR2296882B1 (en) 1977-08-19
DE2555661A1 (en) 1976-07-08
AU8777475A (en) 1977-06-30
BR7508626A (en) 1976-08-24

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Legal Events

Date Code Title Description
ST Notification of lapse