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US3566065A - Motion transfer mechanism - Google Patents

Motion transfer mechanism Download PDF

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Publication number
US3566065A
US3566065A US850787A US3566065DA US3566065A US 3566065 A US3566065 A US 3566065A US 850787 A US850787 A US 850787A US 3566065D A US3566065D A US 3566065DA US 3566065 A US3566065 A US 3566065A
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US
United States
Prior art keywords
diaphragm
opening
pins
plate
combination
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
US850787A
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English (en)
Inventor
Allen V C Davis
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3566065A publication Critical patent/US3566065A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/04—Cases; Covers
    • H01H21/08—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H21/085—Casings hermetically closed by a diaphragm through which passes an actuating member

Definitions

  • a disclike element Secured to the diaphragm in the center of the opening is a disclike element with portions which nest on and slidably engage the pins.
  • a tongue extending from the disc is actuated to rock the disc, and thereby effect rotational movement of a member secured to the other surface of the diaphragm.
  • Such element may be a pin, or it may be a similar disc which is similarly positioned on pins in an opening of another plate abutting the other surface of the diaphragm.
  • This invention relates to devices for transferring motion through a wall via a diaphragm.
  • the frame of reference for the description of this invention is a precision switch and actuating mechanism therefor.
  • the switch is mounted in a hermetically sealed chamber, one wall of which has an opening covered by a diaphragm.
  • a switch actuating member Extending through the diaphragm, and sealed thereto, is a switch actuating member which is so arranged that pressure applied to the external portion is transferred through the diaphragm to the interior portion for actuating the switch.
  • Such a diaphragm is a flexible membrane which tends to move into and out of the switch chamber when pressure is applied to the operating member, or when there are changes in the pressure differential on the opposite surfaces of the diaphragm. Because of this characteristic, the pivotal axis of the switch actuator isnot constant and results in changes in the operating forces for the switch. Many attempts have been made to provide such a motion transfer device which does not permit the diaphragm to float. In such attempts as heretofore known, however, the devices in operation set up undesirable stresses in the diaphragm and shorten its life.
  • My invention embraces a plate having an opening through it, a diaphragm on one surface of the plate covering the opening, an element secured to the diaphragm within the opening, and mean hingedly supporting the element for rotational movement along an axis in the plane of the diaphragm.
  • My invention also embraces a lever or tongue attached to or integral with the element for imparting rotational movement thereto, and a member fixed to the diaphragm opposite said element for actuation upon'such rotational movement. With this arrangement, the diaphragm is prevented from absorbing work and being unduly stressed as in the prior art motion transfer devices.
  • FIG. 5 is a fragmentary sectional view taken along the line I 55 of FIG. 4;
  • FIG. 6 is a fragmentary sectional view, similar to FIG. 3, of a modified form of motion transfer device of myinvention.
  • a switch 10 is positioned in one end of a housing 12.
  • the switch 10 is in a hermetically sealed chamber 14 having an upper wall 16 through which interconnected levers or arms 18, 20 function to actuate the plunger of the switch 10.
  • An element 22 hearing against the upper arm 18 is adapted to be actuated by suitable means in the upper end of the housing 12. If desired, of course, a manually operable switch may be provided by eliminating the element 22 and the upper end of the housing 12.
  • the wall 16 in one form of my invention employs a pair of rigid plates 30 between which a thin, flexible membrane or diaphragm 32 is sandwiched. As indicated, the plates 30 and diaphragm 32 are of the same diameters, and are secured together at their peripheries as by welding. Each of the plates 30 has a circular opening 34, and the plates are secured together with their openings 34 aligned.
  • each plate 30 has a pair of diametrically opposed pins 36 in the opening 34 thereof.
  • the pins 36 have confronting flat faces abutting the opposite surfaces of the diaphragm 32.
  • the pins 36 are shaped with a radius of curvature of a circle having a diameter equal to the combined thicknesses of the plates 30 and diaphragm 32.
  • the pins 36 of the plates 30 function like hinge pins for respective elements 40 from which the arms 18, 20 extend.
  • the element 40 is shown by way of example in the form of a disc having diametrically opposed portions 42 struck therefrom to slidably and matingly fit the pins 36. With the parts thus formed, the element 40 comes to rest against the adjacent surface of the diaphragm 32 when the struck portions 42 are positioned on the ends of the pins 36.
  • the center portion, marked x in FIG. 2 is welded to the diaphragm.
  • the normally higher pressure above the chamber causes portions of the diaphragm 32 to pouch inwardly.
  • the upper element 40 is welded to the diaphragm, and rides on the pins 36, no such inner movement of the diaphragm can take place which will cause the arm 20 to actuate the plunger of the switch 10.
  • the element 40 is shaped to be symmetrical with respect to a line through the pins 36, whereby the element 40 cannot undergo movement without applying a force to the arm 18 thereof.
  • the element 40 When a force is applied to the end of the arm 18, the element 40 rocks on the pins 36 (clockwise in FIG. 3), and the free portions of the diaphragm, i.e., those portions that are pouched inwardly due to a pressure differential, accommodate the motion imparted to the element 40.
  • the parts are preferably adjusted so that the plunger of the switch 10 is actuated within the range of movement permitted by the diaphragm before it becomes taut.
  • the lower element 40 and its arm 20 are replaced with a headed pin 46.
  • the head of the pin is welded to the lower surface of the diaphragm 32, and the shank of the pin engages the plunger of the switch 10.
  • the same rocking movement of the element 40 takes place as above described for the embodiment of FIGS. 1-5.
  • the corresponding movement imparted to the pin 46 causes the switch 10 to be actuated as previously.
  • my invention embraces any means for supporting the element for rotational movement.
  • ball bearings may be mounted on the pins, such bearings having semicylindrical inner and outer races. The elements then roll instead of sliding when they undergo rotational movement.
  • Other means to achieve rolling action may also be employed, e.g., one or more wires having one end of each fixed to the associated plate 30, such wires having free ends interposed between the pins and the portions 42 of the elements.
  • said opening being larger than said element
  • a diaphragm secured to one surface of said plate and spanning said opening, said element being secured to said diaphragm; interconnecting means on said element and said plate supporting said element for rotational movement along a line in the plane of said diaphragm;
  • interconnecting means includes diametrically opposed pins of said plate in said opening and pin mating portions on said element.

Landscapes

  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)
  • Measuring Fluid Pressure (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Mechanisms For Operating Contacts (AREA)
US850787A 1969-08-18 1969-08-18 Motion transfer mechanism Expired - Lifetime US3566065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85078769A 1969-08-18 1969-08-18

Publications (1)

Publication Number Publication Date
US3566065A true US3566065A (en) 1971-02-23

Family

ID=25309112

Family Applications (1)

Application Number Title Priority Date Filing Date
US850787A Expired - Lifetime US3566065A (en) 1969-08-18 1969-08-18 Motion transfer mechanism

Country Status (4)

Country Link
US (1) US3566065A (de)
JP (1) JPS5015578B1 (de)
DE (1) DE2041062C3 (de)
GB (1) GB1254650A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4139756A (en) * 1977-01-03 1979-02-13 General Electric Company Push button switch with secondary push button
US5446252A (en) * 1994-01-21 1995-08-29 Burger; Philip M. Flat spring actuating mechanism for plunger-type switch
US6982392B1 (en) 2005-05-06 2006-01-03 Burger & Brown Engineering, Inc. Water resistant actuating mechanism for plunger type switches
US20080197009A1 (en) * 2007-02-21 2008-08-21 Burger & Brown Engineering, Inc. Low-profile switch with flat spring actuating mechanism

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043225A (en) * 1959-08-10 1962-07-10 Axel L Nielsen Adjustable liquid level control for pumps
US3210507A (en) * 1961-05-08 1965-10-05 Texas Instruments Inc Motion-transfer mechanisms for hermetically sealed diaphragms
US3244849A (en) * 1963-04-22 1966-04-05 Cem Comp Electro Mec Hermetically sealed switching device with bellows
US3304397A (en) * 1964-11-23 1967-02-14 Edwin W Bernhagen Pressure control actuator with sealmounted electrical element
US3373257A (en) * 1966-09-02 1968-03-12 Allen Bradley Co Fluid damped electric switch actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043225A (en) * 1959-08-10 1962-07-10 Axel L Nielsen Adjustable liquid level control for pumps
US3210507A (en) * 1961-05-08 1965-10-05 Texas Instruments Inc Motion-transfer mechanisms for hermetically sealed diaphragms
US3244849A (en) * 1963-04-22 1966-04-05 Cem Comp Electro Mec Hermetically sealed switching device with bellows
US3304397A (en) * 1964-11-23 1967-02-14 Edwin W Bernhagen Pressure control actuator with sealmounted electrical element
US3373257A (en) * 1966-09-02 1968-03-12 Allen Bradley Co Fluid damped electric switch actuator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4139756A (en) * 1977-01-03 1979-02-13 General Electric Company Push button switch with secondary push button
US5446252A (en) * 1994-01-21 1995-08-29 Burger; Philip M. Flat spring actuating mechanism for plunger-type switch
US6982392B1 (en) 2005-05-06 2006-01-03 Burger & Brown Engineering, Inc. Water resistant actuating mechanism for plunger type switches
US20080197009A1 (en) * 2007-02-21 2008-08-21 Burger & Brown Engineering, Inc. Low-profile switch with flat spring actuating mechanism
US7569783B2 (en) 2007-02-21 2009-08-04 Burger & Brown Engineering, Inc. Low-profile switch with flat spring actuating mechanism

Also Published As

Publication number Publication date
DE2041062B2 (de) 1980-04-10
DE2041062A1 (de) 1971-03-04
DE2041062C3 (de) 1980-12-04
GB1254650A (en) 1971-11-24
JPS5015578B1 (de) 1975-06-06

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