Patent US3665765A successfully refreshed from Google Patents.
US3665765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-material condition sensing means
Assignee: Johnson Controls International Inc
•
Filing: 1968-04-11
•
Granted: 1972-05-30
•
Expires: 1988-04-11
Abstract
Abstract A bi-material temperature and/or humidity sensor including a circular disc which is mounted in fixed relation about the periphery. A flexible metal base member has a second material bonded to the center or to the outer portion to form a bimaterial element. The second material is made of a substantially smaller area.
Inventors
- 👤 Victor J Dube
- 👤 Paul E Thoma
- 👤 Jao Shiun Kao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:00
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/48; G01K5/56; G01K5/62; G01K5/64; G01K5/68; G01N; G01N19/00; G01N19/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
23 words
The bi-material condition sensor of claim 1 wherein said fixed mounting means is connected essentially to the full periphery of said base member.
Claim 2
Dependent Claim
17 words
The condition sensor of claim 1 wherein said second material is symmetrically secured to the base member.
Claim 3
Dependent Claim
34 words
The bi-material condition sensor of claim 1 wherein said second material is integrally bonded throughout the interface to the central portion of said base member in substantially spaced relation to said fixed mounting means.
Claim 4
Dependent Claim
18 words
A bi-material sensor in accordance with claim 4 wherein the base member is rigidly held about its periphery.
Claim 5
Dependent Claim
37 words
The condition sensor of claim 1 wherein said base member is a circular plate and said mounting means is secured to the periphery thereof and said second material is secured to the center of the base member.
Claim 6
Dependent Claim
42 words
In a bi-material humidity and temperature sensor in accordance with claim 1 wherein the second material and the base are circular and the base is rigidly held about its periphery and the deflection of said sensor is defined by the following equation:
Claim 7
Dependent Claim
58 words
The condition sensor of claim 1 wherein said base member includes a normal projecting sidewall defining a cup-shaped shell having a peripheral mounting means, and said second material is integrally bonded throughout the interface to the outer surface of the base, the area of the second material being substantially less than said base and spaced from said sidewall.
Claim 8
Dependent Claim
31 words
The condition sensor of claim 8 wherein said base member is a cup-shaped shell having a peripheral mounting flange adapted to be interconnected with a member to define an enclosed chamber.
Claim 9
Dependent Claim
43 words
In a bi-material humidity sensor in accordance with claim 1 wherein the second material and the base are circular and the base is essentially rigidly held about its periphery and the sensitivity to humidity of said sensor is defined by the following equation:
Claim 10
Dependent Claim
43 words
In a bi-material temperature sensor in accordance with claim 1 wherein the second material and the base are circular and the base is essentially rigidly held about its periphery and the sensitivity to temperature to said sensor is defined by the foLlowing equation:
Claim 11
Dependent Claim
83 words
In a bi-material condition sensor adapted to establish a deflection in accordance with the sensed condition comprising a generally flat sensing element having an outer bi-material peripheral portion and a bonded core, said peripheral portion having a high coefficient of expansion material to a first side and a relatively low coefficient of expansion material to a second side, said core having a low coefficient of expansion material to said first side and a relatively high coefficient of expansion material to said second side.
Claim 12
Dependent Claim
57 words
The condition sensor of claim 12, wherein said element is a circular plate and the first and second high coefficient of expansion materials are of the same material and have the same expansion coefficient values and the first and second low coefficient of expansion materials are of the same material and have the same expansion coefficient values.
Claim 13
Dependent Claim
109 words
In a bi-material humidity and temperature sensor in accordance with claim 1 wherein the second material and the base are circular and the base is rigidly held about its periphery, said second material and said base including an outer bi-material peripheral portion and a bonded core, said peripheral portion having a high coefficient of expansion material to a first side and a relatively low coefficient of expansion material to a second side, said core having a low coefficient of expansion material to said first side and a relatively high coefficient of expansion material to said second side and the deflection of said sensor is defined by the following equation:
Claim 14
Dependent Claim
40 words
The condition sensor of claim 1 wherein said base member is a circular plate and said mounting means is secured to the periphery thereof and said second material is ring-shaped and secured to the outer periphery of the base member.
Claim 15
Dependent Claim
71 words
The condition sensor of claim 1 wherein said base member is a circular plate and said mounting means is secured to the periphery thereof and said second material is ring-shaped and secured to the outer periphery of the base member, and a third material having a coefficient corresponding to said second material and applied as a central disc member to the opposite surface of said base member from said second material.
Claim 16
Dependent Claim
105 words
A bi-material humidity sensor adapted to establish a deflection in accordance with the sensed condition comprising a flexible base member having a predetermined humidity coefficient of expansion, said base member being a substantially planar member, fixed mounting means connected at opposite sides of said base member to rigidly support said element at said opposite sides, and a layer of cellulose acetate butyrate cross-linked with urea-formaldehyde and directly bonded to said base member and having a different humidity coefficient of expansion, said layer being spaced from said mounting means and the periphery of said base member to establish a free uncovered portion of said base member.
Claim 17
Dependent Claim
51 words
The condition sensor of claim 17 wherein said base member is an aluminum plate-like member having the surface to which said second material is secured having a thin zinc plated layer covered by a thin copper plated layer, said copper layer being oxidized to improve the adhesion of the second layer.
Claim 18
Dependent Claim
40 words
In a bi-material sensor in accordance with claim 1 wherein said second material is a reaction product of a compound containing glucoside chains and a stabilizing monomer or partial polymer capable of cross-linking with the hydroxyl groups of said glucoside.
Claim 19
Dependent Claim
107 words
A bi-material condition sensor element adapted to be fixedly and rigidly mounted at a pair of oppositely located areas of the element and establishing a deflection therebetween in accordance with the sensed condition comprising a substantially planar base member having a predetermined coefficient of expansion for said condition, and a second material having a different coefficient of expansion for said condition and integrally bonded through the interFace of the base member and the second material to a selected portion of said base member throughout, said selected portion being substantially less than the area of said base member to establish a free uncovered portion of said base member.
Claim 20
Dependent Claim
36 words
The condition sensor of claim 20 wherein said base member is a circular plate adapted to be fixedly mounted about the periphery thereof and said second material is secured to the center of the base member.
Claim 21
Dependent Claim
35 words
The condition sensor of claim 20 wherein said base member is a circular plate adapted to be fixedly mounted about the periphery thereof and said second material is secured to the outer peripheral portion thereof.
Claim 22
Dependent Claim
34 words
The bi-material condition sensor of claim 1, wherein said fixed mounting means is connected essentially to the full periphery of said base member and said second material is symmetrically secured to the base member.
References Cited (Backward Citations)
US1822069A
Cited
US3461723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |