Patent US3559615A successfully refreshed from Google Patents.
US3559615A
Expired / Lapsed
US
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Temperature signaling device
Assignee: DUN RITE Manufacturing CORP
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Filing: 1969-04-23
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Granted: 1971-02-02
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Expires: 1989-04-23
Abstract
Abstract A torsion-loaded indicating member encased within a tubular housing is released from a first orientation for rotational movement to a second orientation upon the attainment of a predetermined temperature. A fusible element is confined between the indicating member and the housing to restrain the member from movement until the element fuses at the predetermined temperature.
Inventors
- 👤 George G Kliewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
292 words
A temperature-indicating device comprising: a. a tubular housing, closed at one end and defining an exposed opening at the other end; b. a rod received in the housing for both rotational and axial movement relative thereto, said rod adapted for movement with respect to said housing from a first position indicating that a predetermined temperature has not been reached to a second extended position indicating that said predetermined temperature has been reached; c. rod-positioning means disposed within said housing to normally urge the rod from said first position to said second position with said rod rotating relative to said housing during at least a portion of movement thereof from said first position to said second position, said rod-positioning means comprising a pair of mating helical surfaces formed on the rod and the housing and a compression spring interposed between the rod and the housing to normally urge the rod in an axial direction towards said extended position relative to the housing, said mating helical surfaces adapted to secure the rod against extension relative to the housing so long as the rod is restrained against rotation relative to the housing and impart rotation to the rod relative to the housing responsive to the influence of the spring upon release of the rod from restraint against rotation relative to the housing; and d. locking means comprising a fusible element having a fusion temperature substantially equal to said predetermined temperature confined between the housing and rod to restrain the rod against movement relative to the housing responsive to the rod positioning means until the fusion temperature of the element is reached, said rod extending through said exposed opening at least when in said second position whereby the position of said rod may be directly observed.
Claim 2
Dependent Claim
292 words
A temperature-indicating device comprising: a. a tubular housing, closed at one end and defining an exposed opening at the other end; b. a rod received in the housing for both rotational and axial movement relative thereto, said rod adapted for movement with respect to said housing from a first position indicating that a predetermined temperature has not been reached to a second extended position indicating that said predetermined temperature has been reached; c. rod-positioning means disposed within said housing to normally urge the rod from said first position to said second position with said rod rotating relative to said housing during at least a portion of movement thereof from said first position to said second position, said rod-positioning means comprising a pair of mating helical surfaces formed on the rod and the housing and a compression spring interposed between the rod and the housing to normally urge the rod in an axial direction towards said extended position relative to the housing, said mating helical surfaces adapted to secure the rod against extension relative to the housing so long as the rod is restrained against rotation relative to the housing and impart rotation to the rod relative to the housing responsive to the influence of the spring upon release of the rod from restraint against rotation relative to the housing; and d. locking means comprising a fusible element having a fusion temperature substantially equal to said predetermined temperature confined between the housing and rod to restrain the rod against movement relative to the housing responsive to the rod positioning means until the fusion temperature of the element is reached, said rod extending through said exposed opening at least when in said second position whereby the position of said rod may be directly observed.
Claim 3
Dependent Claim
81 words
impart rotation to the rod relative to the housing responsive to the influence of the biasing means upon release of the rod from restraint against rotation relative to the housing and, thus, release the Rod for movement to the extended position; b. temperature responsive retention means interposed between the rod and housing to restrain the rod against rotation relative to the housing when in the retracted position and, upon the attainment of a predetermined temperature, release the rod from such restraint.
Claim 4
Dependent Claim
81 words
impart rotation to the rod relative to the housing responsive to the influence of the biasing means upon release of the rod from restraint against rotation relative to the housing and, thus, release the Rod for movement to the extended position; b. temperature responsive retention means interposed between the rod and housing to restrain the rod against rotation relative to the housing when in the retracted position and, upon the attainment of a predetermined temperature, release the rod from such restraint.
Claim 5
Dependent Claim
122 words
In a temperature indicator of the type comprising: I. a tubular housing defining an axially extensive bore closed at one end and open at the other end; II. an indicator rod received within the bore for slidable movement between retracted and extended positions relative to the housing, said rod being movable both axially and rotationally relative to the housing; and, III. biasing means to normally urge the rod to the extended position relative to the housing; an improved construction for maintaining the staff in the retracted position against the influence of the biasing means until a predetermined temperature is reached, said construction comprising: a. first and second cam surfaces formed, respectively, on the housing and rod, said surfaces being mutually engaged to:
Claim 6
Dependent Claim
122 words
In a temperature indicator of the type comprising: I. a tubular housing defining an axially extensive bore closed at one end and open at the other end; II. an indicator rod received within the bore for slidable movement between retracted and extended positions relative to the housing, said rod being movable both axially and rotationally relative to the housing; and, III. biasing means to normally urge the rod to the extended position relative to the housing; an improved construction for maintaining the staff in the retracted position against the influence of the biasing means until a predetermined temperature is reached, said construction comprising: a. first and second cam surfaces formed, respectively, on the housing and rod, said surfaces being mutually engaged to:
Claim 7
Dependent Claim
26 words
In a temperature indicator according to claim 2, the improved construction wherein the cam surfaces comprise mating helices formed, respectively, on the housing and the rod.
Claim 8
Dependent Claim
83 words
In a temperature indicator according to claim 2, the improved construction wherein the retention means comprises: a. a chamber defined, at least in part, by opposed surfaces disposed, respectively, on the rod and housing; b. a volume of fusible material received within the chamber in interposed engagement between said surfaces; and wherein, upon fusion of the material, at least one of the surfaces is adapted to effect displacement of said volume of material to release the rod for rotation relative to the housing.
Claim 9
Dependent Claim
85 words
In a temperature indicator according to claim 4, the improved construction wherein the chamber comprises: a. a cavity formed in an opening through the inner end of the rod, said cavity having at least one wall defining the opposed surface disposed on the rod; and, b. an end wall formed at the closed end of the bore in opposition to the inner end of the rod, said wall having a protrusion extending therefrom into the cavity to define the opposed surface disposed on the housing.
Claim 10
Dependent Claim
67 words
In a temperature indicator according to claim 5, the improved construction wherein the cavity and protrusion are proportioned so that: a. the volume of material may be confined therebetween in slug form removed from the chamber when the rod is in the retracted position; and, b. upon fusion of the material in said form, with the chamber in a predetermined orientation, the material gravitates into the chamber.
Claim 11
Dependent Claim
69 words
In a temperature indicator according to claim 4 the improved construction wherein the chamber comprises: a. a cavity formed in and opening through the interior of the bore, said cavity having at least one wall defining the opposed surface disposed on the housing; and, b. a sidewall formed on the rod in opposition to the cavity in the bore, said sidewall defining the opposed surface disposed on the rod.
Claim 12
Dependent Claim
67 words
In a temperature indicator according to claim 7, the improved construction wherein the cavity and sidewall are proportioned so that: a. the volume of material may be confined therebetween in slug form removed from the chamber when the rod is in the retracted position; and, b. upon fusion of the material in said form, with the chamber in a predetermined orientation, the material gravitates into the chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |