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Publication numberUS2177564 A
Publication typeGrant
Publication dateOct 24, 1939
Filing dateJul 21, 1936
Priority dateJul 21, 1936
Publication numberUS 2177564 A, US 2177564A, US-A-2177564, US2177564 A, US2177564A
InventorsClinton H Havill
Original AssigneeEclipse Aviat Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Expansible element
US 2177564 A
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Description  (OCR text may contain errors)

Oct. 24, 1939.

c. H. HAVILL ,56

EXPANSIBLE ELEMENT Filed July 21, 1936 COPPER- v .BERYLL/UM COPPER 6 BERYLL/UM M/l/AR INVE NTOR. C/mfon ff /7m//// Patented Oct. 24, 1939 UNITED STATES PATENT OFFICE EXPANSIBLE ELEMENT Application July 21, 1936, Serial No. 91,795

1 Claim.

This invention relates to expansible elements and particularly to expansible elements of the character employed in diaphragms or bellows to vary the volume of a chamber formed by one or more of such expansible elements, in combination with one or more relatively fixed elements, 'such as an end wall or an enclosing frame or rim.

In such devices the end wall, enclosing frame, or encircling rim, while relatively fixed, is never- 0 theless subject to at least slight movement or expansiom'as a result of either temperature or pressure changes; and an object of this invention is to prevent, or reduce to a minimum, such thermally induced movement or expansion.

5 In a pressure responsive mechanism, or aneroid, of a barometer or altimeter, a bimetallic thermostat has heretofore been employed to act upon the indicating mechanism in such a manner as to correct for the effect of temperature 30 variations on the presure responsive expansible element. It has been found, however, that the correction factor does not always function as intended due to the intervention of an additional disturbing factor, namely, the tendency of the g5 entire mechanism to shift due to expansion or contraction of the supporting frame. To overcome this difliculty I propose to employ, in lieu of such supporting frame, a disc of a metallic thereto in any suitable manner, as by welding, riveting, etc.

With the illustrative construction indicated in the accompanying drawing, which shows Fig. 1 as a transverse sectional view, and Fig. 2 as a side elevation of the device, the outer rims 4 and 5 5 of the elements 2 and 3, respectively, are held fast regardless of temperature variations, and their tendency to curl inwardly or spread outwardly, is effectively checked by virtue of the engagement with the substantially non-expanding and non-contracting disc 6. At the same time the freedom of expansion and contraction, in an endwise direction, is not restricted and remains as heretofore.

In order to maintain pressure equality on both 5 sides of the disc 6, one or more openings 1 are provided.

What I claim is:

In an aneroid, the combination with a pair of diaphragmsmovable to infinitely numerous dif- 20 ferent positions in response-to correspondingly numerous pressure changes, of means engageable with said diaphragms to hold the outer rims. thereof against movement in their own planes, said means including a metallic disc interposed 25 between said diaphragms and of substantially uniform dimensions at all temperatures, said disc being apertured to create equality of pressure on both sides thereof.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2487947 *Jun 22, 1945Nov 15, 1949Senn Jurg AThin-walled diaphragm power unit
US2698633 *May 9, 1952Jan 4, 1955American Machine & MetalsEvacuated capsule for aneroid barometers
US2718904 *Apr 9, 1952Sep 27, 1955Bendix Aviat CorpPressure sensitive diaphragm assembly
US2753415 *Mar 7, 1952Jul 3, 1956Kollsman Instr CorpPressure responsive switch
US3078738 *Oct 31, 1960Feb 26, 1963Honeywell Regulator CoMotion-to-air-pressure transducer
US4640135 *Jun 14, 1985Feb 3, 1987Endress U. Hauser Gmbh U. Co.Sensor
US4944187 *Dec 23, 1988Jul 31, 1990Rosemount Inc.Multimodulus pressure sensor
US7658196Apr 25, 2007Feb 9, 2010Ethicon Endo-Surgery, Inc.System and method for determining implanted device orientation
US7775215Mar 7, 2006Aug 17, 2010Ethicon Endo-Surgery, Inc.System and method for determining implanted device positioning and obtaining pressure data
US7775966Mar 7, 2006Aug 17, 2010Ethicon Endo-Surgery, Inc.Non-invasive pressure measurement in a fluid adjustable restrictive device
US7844342Feb 7, 2008Nov 30, 2010Ethicon Endo-Surgery, Inc.Powering implantable restriction systems using light
US7927270Jan 29, 2007Apr 19, 2011Ethicon Endo-Surgery, Inc.External mechanical pressure sensor for gastric band pressure measurements
US8016744Mar 7, 2006Sep 13, 2011Ethicon Endo-Surgery, Inc.External pressure-based gastric band adjustment system and method
US8016745Apr 6, 2006Sep 13, 2011Ethicon Endo-Surgery, Inc.Monitoring of a food intake restriction device
US8034065Feb 26, 2008Oct 11, 2011Ethicon Endo-Surgery, Inc.Controlling pressure in adjustable restriction devices
US8057492Feb 12, 2008Nov 15, 2011Ethicon Endo-Surgery, Inc.Automatically adjusting band system with MEMS pump
US8066629Feb 12, 2007Nov 29, 2011Ethicon Endo-Surgery, Inc.Apparatus for adjustment and sensing of gastric band pressure
US8100870Dec 14, 2007Jan 24, 2012Ethicon Endo-Surgery, Inc.Adjustable height gastric restriction devices and methods
US8114345Feb 8, 2008Feb 14, 2012Ethicon Endo-Surgery, Inc.System and method of sterilizing an implantable medical device
US8142452Dec 27, 2007Mar 27, 2012Ethicon Endo-Surgery, Inc.Controlling pressure in adjustable restriction devices
US8152710Feb 28, 2008Apr 10, 2012Ethicon Endo-Surgery, Inc.Physiological parameter analysis for an implantable restriction device and a data logger
US8187162Mar 6, 2008May 29, 2012Ethicon Endo-Surgery, Inc.Reorientation port
US8187163Dec 10, 2007May 29, 2012Ethicon Endo-Surgery, Inc.Methods for implanting a gastric restriction device
US8192350Jan 28, 2008Jun 5, 2012Ethicon Endo-Surgery, Inc.Methods and devices for measuring impedance in a gastric restriction system
US8221439Feb 7, 2008Jul 17, 2012Ethicon Endo-Surgery, Inc.Powering implantable restriction systems using kinetic motion
US8233995Mar 6, 2008Jul 31, 2012Ethicon Endo-Surgery, Inc.System and method of aligning an implantable antenna
US8337389Jan 28, 2008Dec 25, 2012Ethicon Endo-Surgery, Inc.Methods and devices for diagnosing performance of a gastric restriction system
US8377079Dec 27, 2007Feb 19, 2013Ethicon Endo-Surgery, Inc.Constant force mechanisms for regulating restriction devices
US8591395Jan 28, 2008Nov 26, 2013Ethicon Endo-Surgery, Inc.Gastric restriction device data handling devices and methods
US8591532Feb 12, 2008Nov 26, 2013Ethicon Endo-Sugery, Inc.Automatically adjusting band system
WO1990007701A1 *Dec 12, 1989Jul 12, 1990Rosemount IncMultimodulus pressure sensor
Classifications
U.S. Classification73/708, 73/386, 73/729.2
International ClassificationG01L7/00
Cooperative ClassificationG01L7/00
European ClassificationG01L7/00