GB1360742A – Solid state keyboard
– Google Patents
GB1360742A – Solid state keyboard
– Google Patents
Solid state keyboard
Info
Publication number
GB1360742A
GB1360742A
GB3288772A
GB3288772A
GB1360742A
GB 1360742 A
GB1360742 A
GB 1360742A
GB 3288772 A
GB3288772 A
GB 3288772A
GB 3288772 A
GB3288772 A
GB 3288772A
GB 1360742 A
GB1360742 A
GB 1360742A
Authority
GB
United Kingdom
Prior art keywords
housing
windings
toroid
printed circuit
circuit board
Prior art date
1972-06-02
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
GB3288772A
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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.)
1972-06-02
Filing date
1972-07-13
Publication date
1974-07-24
1972-07-13
Application filed by Illinois Tool Works Inc
filed
Critical
Illinois Tool Works Inc
1974-07-24
Publication of GB1360742A
publication
Critical
patent/GB1360742A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03K—PULSE TECHNIQUE
H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
H03K17/965—Switches controlled by moving an element forming part of the switch
H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
H03K17/972—Switches controlled by moving an element forming part of the switch using a magnetic movable element having a plurality of control members, e.g. keyboard
B—PERFORMING OPERATIONS; TRANSPORTING
B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
B41J5/00—Devices or arrangements for controlling character selection
B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
H01H2221/00—Actuators
H01H2221/066—Actuators replaceable
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03K—PULSE TECHNIQUE
H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
H03K17/965—Switches controlled by moving an element forming part of the switch
H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
H03K2017/9706—Inductive element
Abstract
1360742 Keyboards ILLINOIS TOOL WORKS Inc 13 July 1972 [2 June 1972] 32887/72 Heading G4H [Also in Divisions G1 and H3] A non contact making switch for use in a keyboard has a magnet movably mounted with – in the switch housing so as to saturate or desaturate a toroidal transformer core, and the core windings emerge through the housing for insertion into a printed circuit board. The basic switch is shown in Fig. 8; a pair of windings 52 pass through toroid 49, one of the windings carrying an A.C. signal and the other acting as a sense line. The toroid is normally saturated by movable magnets 47, one on each side thereof, so that there is no coupling between the windings. When key 44 is depressed the toroid desaturates and the sense winding receives a signal which can actuate a load, e.g. a typewriter. The windings pass through housing 41 and are soldered to an X-Y matrix of conductors on a printed circuit board 53. The toroid may be formed as a moulded body carrying the windings, Figs. 9, 11, 13, 14 (not shown) detachable from the housing of the switch; after soldering the toroid body to the printed circuit board this allows the housing to be removed for repair purposes. In such cases the housing is normally supported by a separate plate 116, Fig. 15, above the printed circuit board, retaining lugs 124 on the housing being depressible for removal of the housing by a tool 128 inserted through an aperture 126 in the printed circuit board. The board shown in Fig. 15 is provided with space 117a for electronic components.
GB3288772A
1972-06-02
1972-07-13
Solid state keyboard
Expired
GB1360742A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US25920972A
1972-06-02
1972-06-02
Publications (1)
Publication Number
Publication Date
GB1360742A
true
GB1360742A
(en)
1974-07-24
Family
ID=22983995
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3288772A
Expired
GB1360742A
(en)
1972-06-02
1972-07-13
Solid state keyboard
Country Status (10)
Country
Link
JP
(2)
JPS4931231A
(en)
AU
(1)
AU461297B2
(en)
BR
(1)
BR7207356D0
(en)
CA
(1)
CA963393A
(en)
CH
(1)
CH566592A5
(en)
DE
(1)
DE2244122A1
(en)
FR
(1)
FR2188503A5
(en)
GB
(1)
GB1360742A
(en)
IT
(1)
IT972549B
(en)
NL
(1)
NL7211699A
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS57158560U
(en)
*
1981-03-26
1982-10-05
DE3325491A1
(en)
*
1983-06-03
1984-12-06
Cherry Mikroschalter Gmbh, 8572 Auerbach
Keyboard
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3638221A
(en)
*
1969-11-24
1972-01-25
Illinois Tool Works
Solid-state keyboard
1972
1972-07-13
GB
GB3288772A
patent/GB1360742A/en
not_active
Expired
1972-08-11
CA
CA149,262A
patent/CA963393A/en
not_active
Expired
1972-08-17
AU
AU45696/72A
patent/AU461297B2/en
not_active
Expired
1972-08-28
NL
NL7211699A
patent/NL7211699A/xx
not_active
Application Discontinuation
1972-09-08
DE
DE19722244122
patent/DE2244122A1/en
active
Pending
1972-09-12
JP
JP47090990A
patent/JPS4931231A/ja
active
Pending
1972-10-20
BR
BR735672A
patent/BR7207356D0/en
unknown
1972-11-13
FR
FR7240237A
patent/FR2188503A5/fr
not_active
Expired
1972-11-17
CH
CH1677772A
patent/CH566592A5/xx
not_active
IP Right Cessation
1972-12-19
IT
IT3315672A
patent/IT972549B/en
active
1978
1978-01-25
JP
JP686878U
patent/JPS5397931U/ja
active
Pending
Also Published As
Publication number
Publication date
NL7211699A
(en)
1973-12-04
CA963393A
(en)
1975-02-25
CH566592A5
(en)
1975-09-15
FR2188503A5
(en)
1974-01-18
JPS5397931U
(en)
1978-08-09
IT972549B
(en)
1974-05-31
DE2244122A1
(en)
1973-12-13
AU4569672A
(en)
1974-02-28
BR7207356D0
(en)
1974-05-30
JPS4931231A
(en)
1974-03-20
AU461297B2
(en)
1975-05-22
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Legal Events
Date
Code
Title
Description
1974-12-04
PS
Patent sealed
1985-03-06
PCNP
Patent ceased through non-payment of renewal fee
