US3786881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tare adjusting apparatus for a computing scale system
Assignee: Hobart Manfacturing Co
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Filing: 1972-11-30
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Granted: 1974-01-22
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Expires: 1992-11-30
Abstract
Abstract Tare adjusting apparatus for a computing scale system wherein tare adjustment is accomplished by manual positioning of an adjustment knob which is connected to turn off a tare signal light when the knob is touched. This requires the operator to adjust the tare before each weighing, or to touch the knob if the tare adjustment is the same as for the previous weighing. Thus there is avoided any inadvertent use of an incorrect tare weight when weighing a product or computing the value thereof. Further there is disclosed an error detecting circuit which causes the tare signal light to be lit if the operator touches the tare adjustment knob while the scale is weighing the product. The touch control feature is implemented by constructing the tare adjustment knob as a part of an oscillation circuit. When the operator touches the tare adjustment knob his body capacitance is introduced into this oscillation circuit. This in turn produces a flipping of the output of a flip-flop which is connected to control the operation of the tare signal light. For the error detecting embodiment there is provided a logic circuit to control the turning off of the signal light once it has been inadvertently lighted. This logic circuit operates in accordance with one or the other of two disclosed control modes under the joint influence of the output from the tuned oscillation circuit and a signal indicative of the presence of weight on the scale. One control mode requires the operator merely to unload the scale while the other control mode requires him to unload the scale and touch the tare adjusting knob during the unloaded condition.
Inventors
- 👤 K Allen
- 👤 E Boshinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:24
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/38; G01G23/42; G01G19/00; G01G19/40; G01G19/413; G01G19/414; G01G19/4144; G01G23/14; G01G23/16; G01G23/163; G01G23/36; G01G23/37
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
130 words
In a system for weighing loads and recording data including the weight thereof, the combination comprising a weighing mechanism adapted to be deflected from a no load reference position to a balance position in proportion to the weight of the load application thereto, means responsive to establishment of said balance position for each load for recording the data with respect to said load, tare adjusting means including contact means for establishing said no load reference position of said weighing mechanism, presettable means requiring actuation by the operator to condition said system for operation, signal means responsive to actuation of said presettable means to cause a warning signal associated with said tare adjusting means, and means responsive to contact by the operator with said contact means for terminating said warning signal.
Claim 2
Dependent Claim
130 words
In a system for weighing loads and recording data including the weight thereof, the combination comprising a weighing mechanism adapted to be deflected from a no load reference position to a balance position in proportion to the weight of the load application thereto, means responsive to establishment of said balance position for each load for recording the data with respect to said load, tare adjusting means including contact means for establishing said no load reference position of said weighing mechanism, presettable means requiring actuation by the operator to condition said system for operation, signal means responsive to actuation of said presettable means to cause a warning signal associated with said tare adjusting means, and means responsive to contact by the operator with said contact means for terminating said warning signal.
Claim 3
Dependent Claim
49 words
The combination defined in claim 1 wherein said contact means comprises a metal control member, and oscillator means connected between said control member and said signal means and responsive to contact by the operator with said control member to reset said signal means to terminate the warning signal therefrom.
Claim 4
Dependent Claim
95 words
In a scale system having tare adjustment means, tare adjustment indicating means comprising: a. a tare warning indicator for producing a continuous tare warning indication upon activation thereof, b. means for activating said indicator prior to the weighing of an article by said scale system, c. a knob connected for control of said tare adjustment means, d. an oscillation circuit connected for alteration of its oscillation state whenever said knob is touched by an operator, and e. means responsive to said oscillation state alteration for deactivating said indicator and terminating the continuous tare warning therefrom.
Claim 5
Dependent Claim
95 words
In a scale system having tare adjustment means, tare adjustment indicating means comprising: a. a tare warning indicator for producing a continuous tare warning indication upon activation thereof, b. means for activating said indicator prior to the weighing of an article by said scale system, c. a knob connected for control of said tare adjustment means, d. an oscillation circuit connected for alteration of its oscillation state whenever said knob is touched by an operator, and e. means responsive to said oscillation state alteration for deactivating said indicator and terminating the continuous tare warning therefrom.
Claim 6
Dependent Claim
55 words
Apparatus according to claim 3 further comprising means for generating a minimum weight indicating signal whenever the tare adjusted reading of said scale system exceeds a predetermined minimum value and means responsive to said oscillation state alteration for activating said indicator whenever said oscillation state alteration occurs during generation of said minimum weight indicating signal.
Claim 7
Dependent Claim
32 words
Apparatus according to claim 3 said oscillation circuit being tuned for normal continuous oscillation thereof and connected for detuning and suppression of oscillation whenever said knob is being touched by an operator.
Claim 8
Dependent Claim
153 words
In a scale system comprising a weighing mechanism adapted to be deflected from a no load reference position to a balance position in proportion to the weight of a load applied thereto, means for indicating said balance position as a measure of the weight of said load, tare adjusting means for establishing said no load reference position, and means for generating a minimum weight signal when the indicated balance position exceeds a predetermined amount; tare adjustment indicating means comprising: a. a tare warning indicator for providing an indication thereof when said scale system returns to an unloaded condItion, b. manually positionable control means connected to said tare adjusting means, c. an oscillation circuit connected for alteration of its oscillation state whenever said control means are touched by an operator, and d. means responsive to said oscillation state alteration for deactivating said tare warning indicator to indicate that said control means have been touched.
Claim 9
Dependent Claim
153 words
In a scale system comprising a weighing mechanism adapted to be deflected from a no load reference position to a balance position in proportion to the weight of a load applied thereto, means for indicating said balance position as a measure of the weight of said load, tare adjusting means for establishing said no load reference position, and means for generating a minimum weight signal when the indicated balance position exceeds a predetermined amount; tare adjustment indicating means comprising: a. a tare warning indicator for providing an indication thereof when said scale system returns to an unloaded condItion, b. manually positionable control means connected to said tare adjusting means, c. an oscillation circuit connected for alteration of its oscillation state whenever said control means are touched by an operator, and d. means responsive to said oscillation state alteration for deactivating said tare warning indicator to indicate that said control means have been touched.
Claim 10
Dependent Claim
28 words
Apparatus according to claim 6 said tare warning indicator comprising a normally lighted light connected for indication of a touching of said control means by being turned off.
Claim 11
Dependent Claim
47 words
Apparatus according to claim 7 further comprising means for lighting said light whenever said oscillation state alteration occurs during generation of said minimum weight signal and means for keeping said light thereafter lighted until said oscillation state alteration occurs during the absence of said minimum weight signal.
Claim 12
Dependent Claim
37 words
Apparatus according to claim 8 said oscillation circuit being tuned for normal continuous oscillation thereof and connected to said control means for detuning by capacitive coupling to ground whenever said control means are touched by an operator.
Claim 13
Dependent Claim
13 words
Apparatus according to claim 9 said control means comprising an electrically conductive knob.
Claim 14
Dependent Claim
75 words
In a scale system having tare adjustment means, tare adjustment indicating means comprising: a. a tare warning indicator for producing a tare warning indication upon activation thereof, b. manually positionable control means connected for operation of said tare adjustment means, c. an oscillation circuit connected for alteration of its oscillation state whenever said control means are touched by an operator, and d. means responsive to said oscillation state alteration for activating said tare warning indicator.
Claim 15
Dependent Claim
75 words
In a scale system having tare adjustment means, tare adjustment indicating means comprising: a. a tare warning indicator for producing a tare warning indication upon activation thereof, b. manually positionable control means connected for operation of said tare adjustment means, c. an oscillation circuit connected for alteration of its oscillation state whenever said control means are touched by an operator, and d. means responsive to said oscillation state alteration for activating said tare warning indicator.
Claim 16
Dependent Claim
30 words
Apparatus according to claim 11 said tare warning indicator comprising a light connected to be turned on whenever said scale system goes from a loaded condition to an unloaded condition.
Claim 17
Dependent Claim
27 words
Apparatus according to claim 12 said light being connected to be turned on whenever said oscillation state alteration occurs during a loaded condition of said scale system.
Claim 18
Dependent Claim
31 words
Apparatus according to claim 11 said tare warning indicator comprising a light connected to be turned on whenever said oscillation state alternation occurs during a loaded condition of said scale system.
Claim 19
Dependent Claim
33 words
Apparatus according to claim 14 further comprising means to maintain a lighted condition of said light until said control means are touched by an operator during an unloaded condition of said scale system.
Claim 20
Dependent Claim
142 words
In a scale system comprising a lighted display for providing an indication of the weight of a product being weighed, tare adjustment means for compensating for the weight of a container for said product, and means for generating a minimum weight indicating signal whenever the tare adjusted weight indication of said scale system exceeds a predetermined minimum value; tare adjustment indicating means comprising; a. a tare warning indicator for producing a tare warning indication upon activation thereof, b. manually positionable control means connected for operation of said tare adjustment means, c. means for generating an electrical response signal whenever said control means are touched by an operator, and d. means connected for receiving said minimum weight indicating signal and said response signal and operative in response to the joint occurrence thereof to activate said tare warning indicator and blank said lighted display.
Claim 21
Dependent Claim
142 words
In a scale system comprising a lighted display for providing an indication of the weight of a product being weighed, tare adjustment means for compensating for the weight of a container for said product, and means for generating a minimum weight indicating signal whenever the tare adjusted weight indication of said scale system exceeds a predetermined minimum value; tare adjustment indicating means comprising; a. a tare warning indicator for producing a tare warning indication upon activation thereof, b. manually positionable control means connected for operation of said tare adjustment means, c. means for generating an electrical response signal whenever said control means are touched by an operator, and d. means connected for receiving said minimum weight indicating signal and said response signal and operative in response to the joint occurrence thereof to activate said tare warning indicator and blank said lighted display.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |