US3581566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated fluid meter counter
Assignee: Dresser Industries Inc
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Filing: 1968-10-03
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Granted: 1971-06-01
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Expires: 1988-10-03
Abstract
Abstract A bimetallic temperature sensing probe, adapted to be inserted within the thermowell of a positive displacement gas meter, senses the gas temperature, indicating such temperature on a scale. Temperature-induced rotational movement of the bimetallic element positions a cam which varies the ratio between angular rotation of the gas meter output shaft and rotation of the display counter in such a manner as to correct the indicated gas flow to standard conditions. The variable ratio drive imposes an intermittent load on the bimetallic probe assembly, allowing the cam and indicating scale to rotate freely during part of each cycle. The variable ratio drive is accomplished by a crank disc and connecting rod assembly which causes a driving arm to oscillate in an arc upon an idler bearing about a shaft. A driven arm, carrying an overrunning clutch, is driven by the driving arm by an amount whose limits are determined by the cam in one direction and by the duration of the arc of the driving arm in the other direction. The overrunning clutch allows a counter indicative of gas volume to be driven by the movement of the driven arm in the direction away from the cam.
Inventors
- 👤 Randall Goff
- 👤 William Melis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/02; G01F15/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
280 words
A temperature compensating device for a fluid meter comprising in combination: a. temperature sensitive means adapted to be supported in the fluid path of a meter to be compensated for providing winding and unwinding rotational displacement in response to sensed temperature changes; b. a cam member mounted for rotation and rotatably coupled to said temperature sensitive means for concomitant rotation therewith, said cam member defining a cam surface radially outward of its rotational axis providing a variable pitch correlated to the rotational displacement of said temperature sensitive means; c. an eccentric drive mechanism adapted for actuation by the meter to be compensated; d. a pivotally mounted first arm cyclically oscillated by said drive mechanism through forward and rearward strokes of a predetermined angular displacement; e. biasing means; f. a pivotally mounted second arm cyclically operable through strokes of angular displacement less than that of said first arm, said strokes of said second arm being limited in a forward direction by second arm engagement against said cam surface and being limited in a rearward direction by a corresponding position of said first arm, said second arm being constantly urged in said forward direction toward said cam by said biasing means and being displaced from said cam in a rearward direction in opposition to said biasing means by an operable engagement of said first arm; g. a one-way clutch actuatably coupled to said second arm while said second arm is displaced in said rearward direction; h. a counter index operably responsive to actuation of said clutch; and i. brake means operative to arrest said cam member against rotational movement at least while said cam surface is being engaged by said second arm.
Claim 2
Dependent Claim
280 words
A temperature compensating device for a fluid meter comprising in combination: a. temperature sensitive means adapted to be supported in the fluid path of a meter to be compensated for providing winding and unwinding rotational displacement in response to sensed temperature changes; b. a cam member mounted for rotation and rotatably coupled to said temperature sensitive means for concomitant rotation therewith, said cam member defining a cam surface radially outward of its rotational axis providing a variable pitch correlated to the rotational displacement of said temperature sensitive means; c. an eccentric drive mechanism adapted for actuation by the meter to be compensated; d. a pivotally mounted first arm cyclically oscillated by said drive mechanism through forward and rearward strokes of a predetermined angular displacement; e. biasing means; f. a pivotally mounted second arm cyclically operable through strokes of angular displacement less than that of said first arm, said strokes of said second arm being limited in a forward direction by second arm engagement against said cam surface and being limited in a rearward direction by a corresponding position of said first arm, said second arm being constantly urged in said forward direction toward said cam by said biasing means and being displaced from said cam in a rearward direction in opposition to said biasing means by an operable engagement of said first arm; g. a one-way clutch actuatably coupled to said second arm while said second arm is displaced in said rearward direction; h. a counter index operably responsive to actuation of said clutch; and i. brake means operative to arrest said cam member against rotational movement at least while said cam surface is being engaged by said second arm.
Claim 3
Dependent Claim
24 words
A temperature compensating device for a fluid meter according to claim 1 in which said temperature sensing means comprises a helically wound bimetallic coil.
Claim 4
Dependent Claim
49 words
A temperature compensating device for a fluid meter according to claim 1 in which said brake means comprises a first braking member rotatably coupled to said cam member and a second braking member operably associated with said first arm for contacting said first braking member in a braking engagement.
Claim 5
Dependent Claim
31 words
A temperature compensating device for a fluid meter according to claim 3 in which said first and second braking members have mutually parallel surfaces which contact for effecting said braking engagement.
Claim 6
Dependent Claim
60 words
A temperature compensating device for a fluid meter according to claim 4 in which said second braking member is secured to a third arm pivotally mounted and operable concomitantly with said second arm to effect said braking engagement in advance of said second arm engaging said cam member and to effect braking disengagement following second arm displacement from said cam.
Claim 7
Dependent Claim
67 words
A temperature compensating device for a fluid meter according to claim 5 including second biasing means urging said third arm in said forward direction toward said first braking member to effect said braking engagement and means associated with said first arm acting against said third arm in opposition to said second biasing means to displace said third arm in a rearward direction for effecting said braking disengagement.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |