US3867596A - Alternate make-break pushbutton switch assembly with detent means, indicator and indicator slide switch structure - Google Patents

Alternate make-break pushbutton switch assembly with detent means, indicator and indicator slide switch structure Download PDF

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Publication number
US3867596A
US3867596A US383332A US38333273A US3867596A US 3867596 A US3867596 A US 3867596A US 383332 A US383332 A US 383332A US 38333273 A US38333273 A US 38333273A US 3867596 A US3867596 A US 3867596A
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United States
Prior art keywords
push button
plunger
switch
axially
return spring
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Expired - Lifetime
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US383332A
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English (en)
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Rudolf Schadow
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    • 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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/56—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
    • H01H13/562—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force making use of a heart shaped cam
    • 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
    • H01H13/023—Light-emitting indicators

Definitions

  • ABSTRACT A push button switch having a plunger that is movable axially through a housing to selectively engage and disengage contacts by the position of the plunger; a push button that operates upon the end of the plunger to axially shift it; a return spring for the plunger and a separate return spring for the push button, such that the push button and plunger are both normally biased to their return or outward position; detent means hold the plunger in the depressed position, while the push button returns outward; various abutment arrangements are shown for connecting the springs and push buttons and plunger; in a modified embodiment, the push button, instead of being axially operative, is a pivoting key with a lever that is pressed axially against the end of the plunger by pivoting of the key.
  • the present invention relates to a switch component, more particularly for making up rows or blocks of push button switches.
  • the prior art Mechanical push button switch units more particularly those with mutual release of the switches, as used in the wavelength switch arrangements in radio and TV technology or in electronics generally are subject in the main to two substantial disadvantages:
  • the mechanical switching noise which in some circumstances may also give rise to electrical interference, or its mechanical shock action damages sensitive components such as incandescent lamps, and there is the defective alignment of the push buttons arranged close alongside one another in a greater or smaller number.
  • the mechanical switching noise increases with an increase in the mass of the switch plungers; the push button which in most cases is connected with it in a fixed manner, however, has a larger weight than the switch plunger.
  • the mechanical separation of the two is therefore obvious and has already been proposed, although it has been adopted more for other reasons.
  • the mechanical construction for dealing with the problem was, however, too expensive because it was necessary to arrange a push button mechanism in front of the whole switching unit so as to form a second unit and at the same time this front unit had to fulfill the task of providing optical indication of the switching on of a switch, for by means of pressure on a push button although the respective switch slide is brought into its detent-held position, the push button itself springs back into its starting position.
  • the present invention concerns an improvement in conventional groups of push button units made up of push button switch components and involves an addition to the component housing which is supplemented by a cover plate to form a tube and usually having a U-shape, in the form of a front unit which guides the push button in a suitable manner.
  • the push button and the switch slide possess independent return springs and abutments, and in this respect it is possible to take steps so that the push button head can he removed from the front against a certain resistance and can be placed in position again, something which is also possible in some cases in the case of the switch slide after removal of a locking means.
  • the present invention consists in a switch component. more particularly for making up rows or blocks of push button switches, characterised in that a switch plunger and a push button are carried in the same component housing but independently from each other, in that the detent means fixing the switch position act on the switch plunger, which has a return spring and can only be displaced preferentially in the thrust direction by means of the push button provided with a second return spring.
  • the push button or the component has at the front a mechanical switch position indicating means, which is operated by the switch slide.
  • an interchangeable or replaceable fitting with an indicating lamp is incorporated in the push button and in this case in the front unit of the component housing contact lead means are provided for this lamp fitting and possibly in addition a separate lamp switch'is provided which is operated by the switch slide.
  • a push button in the form of a see-saw or piano key in the form of a see-saw or piano key.
  • a single strip spring can bring about both indication and also the return of the key or button.
  • the front unit of the component housing is preferably made in one piece in order to reduce the number of parts to be used during fitting.
  • the front unit can simultaneously incorporate interlocking means for preventing simultaneous actuation of the keys or push buttons, something which is not possible at the rear side in the case of components which have different lengths (in the direction of theh push button or key slide) in accordance with the number of switches.
  • the housing front unit can principally serve I for an improved guidance of the push button and the push button can be loosely connected with the switch plunger so that the switched-on position becomes visible owing to an albeit minimum increase'in the depth of, the push button position, so that the push button only has to move a small distance on actuation.
  • FIG. I is a side view and a section through the switch unit as an illuminated push button or key in the switched-off position.
  • FIG. 2 shows a switch unit in accordance with FIG. 1 in the switched-on position with the push button depressed.
  • FIG. 3 shows a switch component in accordance with FIG. 2 in the switched-on position with the push button springing back.
  • FIG. 4 shows a switch component in accordance with FIG. I mounted in a chassis.
  • FIG. 5 is a plan view of two switch components, mounted alongside one another in a chassis, with lamp contacts.
  • FIG. 6 is a plan view of a switch component with a rubber abutment.
  • FIG. 7 is a side view and section through a switch unit with limited entrainment of the push button and in the switched-off position.
  • FIG. 8 shows a switch component in accordance with FIG. 7 in the switched-on position with the push button depressed.
  • FIG. 9 shows a switch component in accordance with FIG. 8 in the switched-on position with the push button springing back.
  • FIG. 10 shows a switch unit with a push button in the form of a piano key and with a mechanical indication of the switch position, in the switched-off position.
  • FIG. 11 shows a switch component in accordance with FIG. 10 in the switched-on position.
  • FIGS. 1 to 5 show the basic principle of the novel switch component.
  • the U-shaped housing 1 with the cover plate 2 carries the fixed contact 3 and in a conventional manner guides the switch plunger 4, which for its part has contact bridges 5.
  • the housing 1 is extended towards the front, that is to say beyond the front plate of the chassis (see especially FIGS. 4 and 5) by means of two guide lugs la and lb, on which the push button 11 or key slides.
  • the push button carries a detent 13, whose hook simultaneously serves for abutment limitation on a projection of the lug 14.
  • the helical compression spring 8 brings about the return movement of the switch plunger 4 and for its part rests on the one hand against the bottom of the housing I and above against the cover plate 2, and on the other hand the spring rests against the front collar 9 of the switch plunger 4. Its centering is ensured by the housing projection 10 and the cover plate shoulder 2a.
  • the helical compression spring 17 serves for returning the push button 11 or key, against which it rests on the one hand and is centered by the pin 15.
  • the oppo site end of the spring 17 can lie either directly against the projections of the guide lugs la and lb, or, as is shown in FIGS. 1 to 5, can rest against the switch plunger collar 9.
  • the U-shaped part 6 which has the detent profile 7 in the push button plunger 4.
  • the U-shaped part 6 can simultaneously serve as an interchangeable abutment for the switch plunger 4.
  • FIGS. 4 and 5 show an external detent means in the form of a detent slide 22 for connecting switch compo nents which are to be subject to mutual interaction.
  • abutment locking means or'latch 6 It is possible to dispense with the abutment locking means or'latch 6 ifit is a question of push button or key components which are to be subject to mutual interaction.
  • the abutment is then formed by a rubber disc or rubber coupling device 16, which on return movement of the switch plunger 4 abuts in a damped manner on the spring centering means 15 of the push button 11.
  • a rubber disc 27 can be so formed that it cooperates with the abutments 1d and 12, which are located directly on the guide lugs of the housing.
  • the arrangement of the key or push button return spring 17 so that it rests against the switch plunger 4 instead of on the housing offers the advantage that the return impact of the push button in the case of mutual interaction is additionally braked by the spring 17.
  • An essential condition for the satisfactory function of this arrangement is that the spring 17 is selected so as to be weaker than the push button switch return spring 8.
  • the switch component is located in the switched-off position; in this position the push button 11 is held by means of the spring 17 and the hook 13 on the abutment l4. Simultaneously also the switch plunger 4 is heldin its rest position by the spring 8 and the rest position is limited by the rubber disc 16, which for its part rests against the push button centering piece 15.
  • FIG. 2 shows the same switch component with the key or push button depressed, in the case of which the switch plunger 4 snaps into its working position.
  • the formed detent projection or profile 7 is held in the operational condition by the inwardly projecting limb of the U-shaped part 6.
  • the push button 11 is sprung back automatically into its initial position on release, as is shown in FIG. 3, though the switch slide remains in the operational state.
  • FIGS. 1 to 5 show the possibility of accommodation of a lamp within the push button.
  • a lamp holder in the form of a reflector 18 is provided, which in its tapered part accommodates the lamp 19.
  • the lamp holder is accessible from the front after removal of the transparent cap 12.
  • the switch for interruption of illumination should also be provided in the front unit of the component housing.
  • at least one of the contact supply leads 24 projecting from the push button is connected by a resilient contact bridge 25 with the fixed contact 23.
  • both switching operations are shown in one and the same component.
  • the switch plunger 4 In the upper half of the component the switch plunger 4 is located in the initial position and the insulating carrier 26 connected fixedly with it holds the contact bridge 25 in a position, which interrupts the contact between 23 and 24.
  • the switch.plunger 4 is in the switched-on position.
  • FIGS. 7, 8, and 9 A further possibility for indicating the switched-on position, which is made visible by a semi-depressed push button but nevertheless maintains the advantages of the non-rigid connection of the push button with the switch plunger and the improved guidance of the push button, is shown in FIGS. 7, 8, and 9.
  • an abutment in accordance with FIG. 6 is provided consisting of the rubber disc 27 and the abutments 1e and Id, respectively.
  • the abutments 1e mounted on the guide lug lb are shown.
  • the principle of the invention is closely concerned with the hook 28 on the push button 11, which in the case of the switched-on position is connected with the push button collar 9.
  • FIG. 7 the switch slide 4 and the push button 11 are in the switched-off position. Between the rubber buffer 27 and the spring centering means 15 there is a small space, which in the drawing is denoted as A. Between the hook 28 and the switch plunger collar 9 the distance is to be denoted as b.
  • FIGS. 10 and 11 the function of a switch component with a piano key and a mechanical switch position indicator is shown.
  • the switch slide 4 can in this case as well be braked by a rubber disc 27 against fixed abutments 1d, 1e on the housing lugs la, 1b on return movement.
  • a pivot point 30 lying above the housing lugs and which is created by an U-shaped adaptor 29, which is provided for by the shoulders 29 ex tending in an upward direction over the two housing lugs la, lb until there is an engagement with the bottom 29a. and by fitting over of the shoulders 29b.
  • the bearing means of the piano key is still more robust in an adaptor, which forms a completely closed frame and on being pushed over the housing lugs on the front snap in behind two edges, provided on the lugs, like the abutments Id, be so that the frame cannot be pulled off forwards.
  • the piano key 31 or button has inwardly directed pins 30 on both sides and which fit into the bearing hole 30 of the adaptor 29 or the pins are arranged in the adaptor and the longitudinal holes or slots are arranged in the piano key or button.
  • the lever 31a acting on the switch plunger 4 is attached in a fixed manner to the piano key for example by being moulded on though above the key a space 310 is provided in which the strip spring 32 can be slid as far as the foremost wall of the piano key.
  • the spring 32 which can also be made all of a suitable plastics material, has as a first task that of returning the key.
  • a window 31b is provided at a suitable position inthe piano key and if the strip spring 32 is attached to the switch plunger for example by being provided at this end with a fork held between the spring 8 and the switch plunger collar 9, a coloured mark 32a, which in accordance with FIG. 10 is still outside the window 31b, can be made visible in the switched-on position in accordance with FIG. 11 in the window 31b.
  • any other mechanical indicator as for example one using a rotary drum or ball and adjustable hinged means, which are operated by the switch plunger.
  • a push button switch comprising:
  • a switch plunger positioned in said housing; said plunger having an axis extending along said housing and said plunger being axially shiftable along said axis through said housing; bridging contacts carried on said plunger and movable therewith through said housing and positioned to be engaged with said fixed contacts;
  • a plunger return spring in engagement with said plunger to bias same axially in a direction toward a push button
  • detent means engaging said plunger for holding sam nonmovably against the biasing of said plunger spring
  • a push button located and oriented to engage said plunger; said push button being shiftable axially of said plunger to shift said plunger axially in opposition to said plunger spring; said push button being supported by said housing and being separate from and movable independently of said plunger;
  • a push button return spring separate from said plunger return spring and connected with said push button and normally biasing said push button axially of and away from said plunger.
  • the push button switch of claim 1 further comprising an energy absorbent abutment carried in said housing and positioned to be engaged by said plunger as said plunger is biased axially by its said return spring, thereby to restrain spring caused motion of said plunger.
  • the push button switch of claim 1 further comprising a plunger position indicator in said push button and connected with said plunger for indicating when said plunger is depressed axially against its said return spring.
  • said indicator comprises illumination means and a switch for operating said illumination means, operation of said illumination means switch to selectively light and extinguish said illumination means being dependent upon the position of said plunger, and said push button being comprised so as to permit observation of said illumination means therein.
  • said illumination means switch further comprises cooperating contact bridges carried on said plunger and movable therewith to be engaged by said contacts of said light source.
  • said push button is in the form of a pivotable key; said housing carrying a fixedly located pivot to which said push button key is pivotally connected; a lever attached to said pivotable key and engaging and pressing said plunger against its said return spring as said key is pivoted in one direction.
  • said push button return spring is comprised of a strip spring, which engages said key to normally bias said key to pivotally return from the position at which said key lever shifts said plunger.
  • an indicator element connected with and operable by motion axially with said plunger by said strip spring; said indicator element being axially shifted with said plunger as said strip spring shifts axially, thereby axially shifting said indicator element with respect to said key, whereby the motion of said indicator element indicates the position of said plunger.

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  • Push-Button Switches (AREA)
US383332A 1972-09-06 1973-07-27 Alternate make-break pushbutton switch assembly with detent means, indicator and indicator slide switch structure Expired - Lifetime US3867596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2243639A DE2243639C3 (de) 1972-09-06 1972-09-06 Schieberschalter

Publications (1)

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US3867596A true US3867596A (en) 1975-02-18

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US383332A Expired - Lifetime US3867596A (en) 1972-09-06 1973-07-27 Alternate make-break pushbutton switch assembly with detent means, indicator and indicator slide switch structure

Country Status (7)

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US (1) US3867596A (enrdf_load_stackoverflow)
JP (1) JPS4986886A (enrdf_load_stackoverflow)
DE (1) DE2243639C3 (enrdf_load_stackoverflow)
DK (1) DK143007C (enrdf_load_stackoverflow)
FR (1) FR2198240B1 (enrdf_load_stackoverflow)
GB (1) GB1435222A (enrdf_load_stackoverflow)
IT (1) IT992758B (enrdf_load_stackoverflow)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245141A (en) * 1979-08-03 1981-01-13 Lucas Industries Limited Electrical switches
US4264799A (en) * 1978-02-16 1981-04-28 Lucas Industries Limited Electrical switches
US4357511A (en) * 1981-09-04 1982-11-02 Eaton Corporation Modular push-button switch with lighted push-button element
US4394555A (en) * 1981-06-08 1983-07-19 General Motors Corporation Switch assembly with pivoted actuator
US4398075A (en) * 1980-07-08 1983-08-09 Elekto-Apparatebau Olten, A.G. Mechanical switch
US4404444A (en) * 1982-02-04 1983-09-13 Electronic Components Groupe, Inc. Convertible alternate action/momentary pushbutton switch
USRE31557E (en) * 1978-08-11 1984-04-17 Lucas Industries Limited Electrical switches
US4533804A (en) * 1977-07-29 1985-08-06 Itt Industries, Inc. Push button slide switch
US4577117A (en) * 1982-06-14 1986-03-18 Kabushiki-Kaisha Tokai-Rika-Denki-Seisakusho Light responsive switch structure for use in a motor vehicle or the like
WO1986006872A1 (en) * 1985-05-13 1986-11-20 Bell Industries, Inc. Illuminated push button switch
US4631377A (en) * 1985-02-21 1986-12-23 General Research Of Electronics, Inc. Slide switch with indicator light
US4635167A (en) * 1985-05-13 1987-01-06 Bell Industries, Inc. Low profile lamp assembly
US4851623A (en) * 1984-12-05 1989-07-25 Omron Tateisi Electronics Co. Push-button switch
US5262606A (en) * 1987-04-13 1993-11-16 Illinois Tool Works Inc. Selectable switch action
US5736697A (en) * 1995-02-01 1998-04-07 General Electric Company Mechanically actuated indicator for a pushbutton switch
US20030128191A1 (en) * 2002-01-07 2003-07-10 Strasser Eric M. Dynamically variable user operable input device
US20040163936A1 (en) * 2001-02-28 2004-08-26 Clegg Paul T. Button assembly with status indicator and programmable backlighting
US20070183449A1 (en) * 2005-09-07 2007-08-09 Vantage Controls, Inc. Radio frequency multiple protocol bridge
US7307542B1 (en) 2003-09-03 2007-12-11 Vantage Controls, Inc. System and method for commissioning addressable lighting systems
US7394451B1 (en) 2003-09-03 2008-07-01 Vantage Controls, Inc. Backlit display with motion sensor
US20080245643A1 (en) * 2007-04-04 2008-10-09 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Button device
US7755506B1 (en) 2003-09-03 2010-07-13 Legrand Home Systems, Inc. Automation and theater control system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5713704Y2 (enrdf_load_stackoverflow) * 1975-03-04 1982-03-19
DE2618572C3 (de) * 1976-04-28 1979-03-15 Rudolf Schadow Gmbh, 1000 Berlin Schiebetastenschalter
JPS5821461Y2 (ja) * 1978-10-05 1983-05-07 アルプス電気株式会社 プツシユスイツチ
CH653171A5 (de) * 1981-11-05 1985-12-13 Olten Ag Elektro Apparatebau Tastschalter.
JPH0431687Y2 (enrdf_load_stackoverflow) * 1987-08-12 1992-07-30

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US2430189A (en) * 1944-12-22 1947-11-04 Robert Hetherington And Son In Indicating switch
US2630503A (en) * 1951-03-05 1953-03-03 Central Commercial Ind Inc Electric switch
US3582592A (en) * 1968-02-21 1971-06-01 Rudolf Schadow Pushbutton switches
US3598948A (en) * 1970-04-24 1971-08-10 Gen Electric Miniature square oiltight pushbutton switch
US3639714A (en) * 1970-05-15 1972-02-01 Fujisoku Electric Pushbutton alternate action switch with pushbutton shaft unconnected to alternate action actuator block
US3776049A (en) * 1971-05-19 1973-12-04 Korry Mfg Co Alternately released and detained reciprocable actuating mechanism

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DE1144810B (de) * 1955-08-13 1963-03-07 Merten Geb Elektrische, von einer Geraetetuer betaetigte Schaltfassung
DE1206985B (de) * 1959-12-15 1965-12-16 Siemens Ag Betaetigungseinrichtung fuer Fussschalter
DE1138844B (de) * 1960-01-18 1962-10-31 Busch Jaeger Duerener Metall Drucktastenschalter mit Verlaengerungsstueck
US3364783A (en) * 1965-08-10 1968-01-23 William H. Coe Push button control unit
CH528141A (fr) * 1969-03-26 1972-09-15 Breter Spa Interrupteur à bouton-poussoir

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430189A (en) * 1944-12-22 1947-11-04 Robert Hetherington And Son In Indicating switch
US2630503A (en) * 1951-03-05 1953-03-03 Central Commercial Ind Inc Electric switch
US3582592A (en) * 1968-02-21 1971-06-01 Rudolf Schadow Pushbutton switches
US3598948A (en) * 1970-04-24 1971-08-10 Gen Electric Miniature square oiltight pushbutton switch
US3639714A (en) * 1970-05-15 1972-02-01 Fujisoku Electric Pushbutton alternate action switch with pushbutton shaft unconnected to alternate action actuator block
US3776049A (en) * 1971-05-19 1973-12-04 Korry Mfg Co Alternately released and detained reciprocable actuating mechanism

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533804A (en) * 1977-07-29 1985-08-06 Itt Industries, Inc. Push button slide switch
US4264799A (en) * 1978-02-16 1981-04-28 Lucas Industries Limited Electrical switches
USRE31557E (en) * 1978-08-11 1984-04-17 Lucas Industries Limited Electrical switches
US4245141A (en) * 1979-08-03 1981-01-13 Lucas Industries Limited Electrical switches
US4398075A (en) * 1980-07-08 1983-08-09 Elekto-Apparatebau Olten, A.G. Mechanical switch
US4394555A (en) * 1981-06-08 1983-07-19 General Motors Corporation Switch assembly with pivoted actuator
US4357511A (en) * 1981-09-04 1982-11-02 Eaton Corporation Modular push-button switch with lighted push-button element
US4404444A (en) * 1982-02-04 1983-09-13 Electronic Components Groupe, Inc. Convertible alternate action/momentary pushbutton switch
US4577117A (en) * 1982-06-14 1986-03-18 Kabushiki-Kaisha Tokai-Rika-Denki-Seisakusho Light responsive switch structure for use in a motor vehicle or the like
US4851623A (en) * 1984-12-05 1989-07-25 Omron Tateisi Electronics Co. Push-button switch
US4631377A (en) * 1985-02-21 1986-12-23 General Research Of Electronics, Inc. Slide switch with indicator light
WO1986006872A1 (en) * 1985-05-13 1986-11-20 Bell Industries, Inc. Illuminated push button switch
US4635167A (en) * 1985-05-13 1987-01-06 Bell Industries, Inc. Low profile lamp assembly
US5262606A (en) * 1987-04-13 1993-11-16 Illinois Tool Works Inc. Selectable switch action
US5736697A (en) * 1995-02-01 1998-04-07 General Electric Company Mechanically actuated indicator for a pushbutton switch
US7414210B2 (en) 2001-02-28 2008-08-19 Vantage Controls, Inc. Button assembly with status indicator and programmable backlighting
US20040163936A1 (en) * 2001-02-28 2004-08-26 Clegg Paul T. Button assembly with status indicator and programmable backlighting
US7432463B2 (en) * 2001-02-28 2008-10-07 Vantage Controls, Inc. Button assembly with status indicator and programmable backlighting
US20070209913A1 (en) * 2001-02-28 2007-09-13 Clegg Paul T Button assembly with status indicator and programmable backlighting
US20070209912A1 (en) * 2001-02-28 2007-09-13 Clegg Paul T Button assembly with status indicator and programmable backlighting
US20070209916A1 (en) * 2001-02-28 2007-09-13 Clegg Paul T Button assembly with status indicator and programmable backlighting
US7432460B2 (en) 2001-02-28 2008-10-07 Vantage Controls, Inc. Button assembly with status indicator and programmable backlighting
US7361853B2 (en) 2001-02-28 2008-04-22 Vantage Controls, Inc. Button assembly with status indicator and programmable backlighting
US20030128191A1 (en) * 2002-01-07 2003-07-10 Strasser Eric M. Dynamically variable user operable input device
US7394451B1 (en) 2003-09-03 2008-07-01 Vantage Controls, Inc. Backlit display with motion sensor
US7307542B1 (en) 2003-09-03 2007-12-11 Vantage Controls, Inc. System and method for commissioning addressable lighting systems
US7755506B1 (en) 2003-09-03 2010-07-13 Legrand Home Systems, Inc. Automation and theater control system
US20070183449A1 (en) * 2005-09-07 2007-08-09 Vantage Controls, Inc. Radio frequency multiple protocol bridge
US7778262B2 (en) 2005-09-07 2010-08-17 Vantage Controls, Inc. Radio frequency multiple protocol bridge
US20080245643A1 (en) * 2007-04-04 2008-10-09 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Button device
US7442890B1 (en) * 2007-04-04 2008-10-28 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Button device

Also Published As

Publication number Publication date
FR2198240A1 (enrdf_load_stackoverflow) 1974-03-29
DK143007C (da) 1981-10-19
FR2198240B1 (enrdf_load_stackoverflow) 1978-09-08
DE2243639A1 (de) 1974-03-28
DE2243639B2 (de) 1975-09-25
GB1435222A (en) 1976-05-12
DE2243639C3 (de) 1982-05-13
IT992758B (it) 1975-09-30
JPS4986886A (enrdf_load_stackoverflow) 1974-08-20
DK143007B (da) 1981-03-09

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