US3360627A - Pushbutton key with a dust protected passage for the pushbutton head - Google Patents

Pushbutton key with a dust protected passage for the pushbutton head Download PDF

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Publication number
US3360627A
US3360627A US623141A US62314167A US3360627A US 3360627 A US3360627 A US 3360627A US 623141 A US623141 A US 623141A US 62314167 A US62314167 A US 62314167A US 3360627 A US3360627 A US 3360627A
Authority
US
United States
Prior art keywords
pushbutton
shaft
head
key
dust
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
US623141A
Other languages
English (en)
Inventor
Wessel Gerhard
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US3360627A publication Critical patent/US3360627A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/02—Controlling members for hand actuation by linear movement, e.g. push buttons
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/02—Controlling members for hand actuation by linear movement, e.g. push buttons
    • G05G1/025—Controlling members for hand actuation by linear movement, e.g. push buttons actuated by sliding movement
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G25/00—Other details or appurtenances of control mechanisms, e.g. supporting intermediate members elastically
    • G05G25/04—Sealing against entry of dust, weather or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • 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
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/004—Permanent magnet actuating reed switches push-button-operated, e.g. for keyboards

Definitions

  • a dust-protected pushbutton key is formed by two principal parts or assemblies including a shaft and a pushbutton head.
  • the pushbutton head is shaped to fit through and over a collar to prevent the passage of dust and provide mechanical contact with the shaft.
  • the shaft supports a magnet and relay contacts while it is held against the pushbutton head 'by a spring. Pressure on the pushbutton head will cause the shaft to move the magnet to magnetically open or close the relay contacts.
  • the present invention relates to a pushbutton key capable of being built or inserted into cabinets or plates and which, at its point of insertion, is provided with a dust protection means.
  • pushbutton keys which are built into a cabinet or a plate, have an air gap around the pushbutton head.
  • This air gap provides clearance for the pushbutton head necessary for actuation, and is necessary for manufacturing and technical reasons.
  • This air gap is a disadvantage insofar that dust can freely pass therethrough and into the inside of the cabinet in which are arranged the contacting elements of the pushbutton key, or other components.
  • the air gap permits a turning of the pushbutton head which may have a disadvantageous effect upon the actuation of the contacting elements.
  • both the pushbutton shaft and the pushbutton head consist of one part which is separated from the remaining parts or elements belonging to the pushbutton key, and only acts upon the remaining parts by way of a pressure transfer, and that as a guide for the pushbutton shaft, either the plate or the wall of the cabinet is designed as a pulled up shoulder or as a bushing engaging the pushbutton head from below.
  • the pushbutton head is designed to have a T-shaped crosssection.
  • reference numeral 1 indicates the pushbutton shaft forming one unit with the pushbutton head 2.
  • the pushbutton head 2 is shown in a sectional elevation, and may have a round or cornered design.
  • the pushbutton head 2 extends with its shaft 1 through a passage provided in the wall of a cabinet or a plate 3.
  • the passage is provided with a collar or shoulder 4.
  • a through-going oblong hole which serves as mounting for the top part of the pushbutton key including parts 1 and 2.
  • a pin 5 is pushed through a boring provided in the collar (shoulder) 4, for restricting the movement of the pushbutton shaft 1 in the direction of operation and in opposition thereto.
  • the T-shaped crosssection of the pushbutton head 2 effects with its edges 7 that the pushbutton head 2 will extend over the collar or shoulder of the shaft guide 4.
  • the shaft 1 engages the actuating pin 16 of a plastic member 8 which, by the action of a compression spring 9 resting against the surface of a plate 10, is pressed against the bottom side of a plate 11, with the surface 12 of part 8 acting as a limit stop.
  • an annular magnet 13 or any other body producing a magnetic field which may be capable of being moved together with the part 8 upon actuation of the pushbutton key, in opposition to the action of spring 9.
  • a hermetically sealed reed contact 14 in such a way that the armature members movably arranged within the reed contact 14, and quite according to requirements, are either closed in the non-operated pushbutton key position (break contact) or are opened (make contact). If the pushbutton key is actuated in direction towards the spring 9, then the annular magnet 13 is shifted or displaced in the same direction so that e.g. a normally closed contact is opened, and a normally opened contact is closed.
  • the spring 9 finds its counter support in the offset portion 15 of part 8.
  • a pushbutton key for opening and closing reed contacts and incorporating dust protection means comprising first and second parts aligned along a common central axls,
  • said first part including a pushbutton shaft terminating at one end in a push-button head and at the other end in a shaft head,
  • said second part including annular magnetic means
  • said second part including means for enabling the actuation of electrical contacts through changes in the position of said magnetic means along said central axis responsive to the transfer of pressure through said pushbutton shaft from said pushbutton head,
  • said second part including an actuating pin forming one end of its axis for contacting the shaft head and an offset portion around the other end of the axis for contacting a spring
  • said offset portion supporting said spring under mechan- 4 the shaft to form a cup around the end of the shaft, means including a collar for accepting said pushbutton shaft and permitting extension of the shaft therethrough,
  • said second portion of said pushbutton key including said spring urging said second part along the central an annular permanent magnet having an axis coinaxis in the direction of the pushbutton head, ciding with said common central axis for providing a bushing for supporting said pushbutton shaft in a a magnetic field for opening and closing electrical manner to permit the shaft to move freely along the contacts, central axis, said pushbutton shaft head engaging said second porsaid bushing serving also as a collar cooperating with tion of said pushbutton key to act upon it by pressaid pushbutton head to restrict the flow of dust, sure transfer, and to change the position of said pera hole through said bushing, manent magnet to thereby alter the condition of said an oblong hole through the pushbutton shaft, and el trical o ta t a P through both Said holes to retain the pushbutton said collar extending under the pushbutton head as a shaft within the bushing while permitting its motion bushing and dust protector, along Said
  • a pushbutton key for opening and closing electrical e erences l e contacts which is free from the infiltration of dust through UNITED STATES PATENTS its point of insertion through and into a supporting body 3,172,985 3/1965
  • Bittner 200-172 a first portion aligned along a common central axis and 2 995 640 8/1961 Panerai et a1 a second portion, 7 u 3,190,985 6/1965
  • Pearse et al 335-162 said first portion including a pushbutton shaft integral 3,243,544 3/1966 Mayer 33S ZO7 at one end with a pushbutton head and terminating at the other end as a shaft head, I I said push button head being T-shaped with long ex- 35 ROBERT SCHAEFER Prlma'y Examme" H. O. I ONES, Assistant Examiner.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Push-Button Switches (AREA)
US623141A 1964-08-20 1967-03-14 Pushbutton key with a dust protected passage for the pushbutton head Expired - Lifetime US3360627A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST022568 1964-08-20

Publications (1)

Publication Number Publication Date
US3360627A true US3360627A (en) 1967-12-26

Family

ID=7459440

Family Applications (1)

Application Number Title Priority Date Filing Date
US623141A Expired - Lifetime US3360627A (en) 1964-08-20 1967-03-14 Pushbutton key with a dust protected passage for the pushbutton head

Country Status (5)

Country Link
US (1) US3360627A (de)
CH (1) CH435408A (de)
GB (1) GB1103295A (de)
NL (1) NL6510588A (de)
SE (1) SE329202B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478186A (en) * 1967-05-11 1969-11-11 Int Standard Electric Corp Pushbutton assembly incorporating self-fastening elements
US3614364A (en) * 1970-02-27 1971-10-19 Cherry Electrical Prod Antiwobble actuator for an electric switch
US3727021A (en) * 1972-06-22 1973-04-10 Lasko Metal Prod Inc Rotary switch housing
JPS51111060U (de) * 1975-03-05 1976-09-08
US4568807A (en) * 1984-08-02 1986-02-04 Eaton Corporation Trigger tool handle switch with structural dust seal
EP0712511A4 (de) * 1993-08-13 1996-12-27 Mattel Inc Fusspedalschalter mit staubschutz
US20100007402A1 (en) * 2008-07-10 2010-01-14 Przemyslaw Chamuczynski Weatherproof switch for indoor and outdoor information clusters and function switches
US20150091679A1 (en) * 2013-09-27 2015-04-02 Contelec Ag Contactless switch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995640A (en) * 1956-11-14 1961-08-08 Panerai Giuseppe Device for controlling from outside a mechanical or electrical member contained in a pressure tight box or container, with no element passing through the box
US3172985A (en) * 1961-10-25 1965-03-09 Allen Bradley Co Push button assembly
US3190985A (en) * 1963-05-06 1965-06-22 Allen Bradley Co Convertible reed contact relay
US3243544A (en) * 1964-12-09 1966-03-29 Allen Bradley Co Convertible relay control station
US3261958A (en) * 1965-04-13 1966-07-19 Prec Parts Company Inc Impulse actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995640A (en) * 1956-11-14 1961-08-08 Panerai Giuseppe Device for controlling from outside a mechanical or electrical member contained in a pressure tight box or container, with no element passing through the box
US3172985A (en) * 1961-10-25 1965-03-09 Allen Bradley Co Push button assembly
US3190985A (en) * 1963-05-06 1965-06-22 Allen Bradley Co Convertible reed contact relay
US3243544A (en) * 1964-12-09 1966-03-29 Allen Bradley Co Convertible relay control station
US3261958A (en) * 1965-04-13 1966-07-19 Prec Parts Company Inc Impulse actuator

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478186A (en) * 1967-05-11 1969-11-11 Int Standard Electric Corp Pushbutton assembly incorporating self-fastening elements
US3614364A (en) * 1970-02-27 1971-10-19 Cherry Electrical Prod Antiwobble actuator for an electric switch
US3727021A (en) * 1972-06-22 1973-04-10 Lasko Metal Prod Inc Rotary switch housing
JPS51111060U (de) * 1975-03-05 1976-09-08
US4568807A (en) * 1984-08-02 1986-02-04 Eaton Corporation Trigger tool handle switch with structural dust seal
EP0712511A4 (de) * 1993-08-13 1996-12-27 Mattel Inc Fusspedalschalter mit staubschutz
US20100007402A1 (en) * 2008-07-10 2010-01-14 Przemyslaw Chamuczynski Weatherproof switch for indoor and outdoor information clusters and function switches
US8279029B2 (en) * 2008-07-10 2012-10-02 Flextronics Automotive, Inc. Weatherproof switch for indoor and outdoor information clusters and function switches
US20150091679A1 (en) * 2013-09-27 2015-04-02 Contelec Ag Contactless switch
US9318280B2 (en) * 2013-09-27 2016-04-19 Contelec Ag Contactless switch

Also Published As

Publication number Publication date
GB1103295A (en) 1968-02-14
CH435408A (de) 1967-05-15
NL6510588A (de) 1966-02-21
SE329202B (de) 1970-10-05

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