US3673607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Billing demand recorder
Assignee: Dayton Electronic Products Co
•
Filing: 1971-01-20
•
Granted: 1972-06-27
•
Expires: 1991-01-20
Abstract
Abstract A recording instrument, such as an electrical power meter, controls the actuation of an electrical switch from one position to another at a rate which is a function of a measured quantity, such as kilowatt hours. The electrical switch controls the direction of current flow through a magnetic recording head so that information representing the measured quantity can be placed on a recording medium. A constant current power supply is provided to insure consistency of information placed on the recording medium independently of line voltage changes, and light emitting diodes are included in series with the magnetic head to show the existence and the direction of current flow through the recording head. Latching flip-flops may also be included between the electrical switch and the recording head to prevent the recording of multiple marks due to switch bounce. Electrically actuated mechanical counters may also be used to record changes in switch position.
Inventors
- 👤 James D Hoeffel
- 👤 Reinhold W Kubach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/56; G01R11/57; G01R11/58
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
In a recording instrument including: an electrical switch which can assume one of two positions; means for actuating said electrical switch between said positions at a rate which is a function of a measured quantity; at least one magnetic recording head for applying magnetic marks to a recording medium under the control of said electrical switch; and means for supplying current to said magnetic recording head in a direction determined by the position of said electrical switch; the improvement comprising: a pair of light emitting diodes connected in inverse parallel relation with each other and in series with each said magnetic recording head for indicating the existence of and the direction of current flow through said recording head.
Claim 2
Dependent Claim
118 words
In a recording instrument including: an electrical switch which can assume one of two positions; means for actuating said electrical switch between said positions at a rate which is a function of a measured quantity; at least one magnetic recording head for applying magnetic marks to a recording medium under the control of said electrical switch; and means for supplying current to said magnetic recording head in a direction determined by the position of said electrical switch; the improvement comprising: a pair of light emitting diodes connected in inverse parallel relation with each other and in series with each said magnetic recording head for indicating the existence of and the direction of current flow through said recording head.
Claim 3
Dependent Claim
39 words
The recording instrument of claim 1 further including flip-flop means electrically conneCted between said electrical switch and said recording head for preventing multiple marks from being applied by said recording head to the recording medium due to switch bounce.
Claim 4
Dependent Claim
59 words
The recording instrument of claim 1 wherein a plurality of switches are provided to measure a corresponding plurality of measured quantities, wherein a plurality of magnetic recording heads are provided to apply magnetic marks to said recording medium, and wherein each of said switches is connected to a corresponding flip-flop to control recording current through corresponding said recording heads.
Claim 5
Dependent Claim
30 words
The recording instrument of claim 1 further including means for counting the changes in position of said switch means independently of the recording of magnetic marks on said recording medium.
Claim 6
Dependent Claim
112 words
In a recording instrument including an electrical switch which can assume one of two positions; means for actuating said electrical switch between said positions at a rate which is a function of a measured quantity; at least one magnetic recording head for applying magnetic marks to a recording medium under the control of said electrical switch; and means for supplying current to said magnetic recording head in a direction determined by the position of said electrical switch; the improvement comprising flip-flop means electrically connected between said electrical switch and said recording head for preventing multiple magnetic marks from being applied by said recording head to the recording medium due to switch bounce.
Claim 7
Dependent Claim
112 words
In a recording instrument including an electrical switch which can assume one of two positions; means for actuating said electrical switch between said positions at a rate which is a function of a measured quantity; at least one magnetic recording head for applying magnetic marks to a recording medium under the control of said electrical switch; and means for supplying current to said magnetic recording head in a direction determined by the position of said electrical switch; the improvement comprising flip-flop means electrically connected between said electrical switch and said recording head for preventing multiple magnetic marks from being applied by said recording head to the recording medium due to switch bounce.
Claim 8
Dependent Claim
17 words
The recording instrument of claim 5 wherein said means for supplying current is a constant current source.
Claim 9
Dependent Claim
33 words
The recording instrument of claim 5 further including electro-mechanical means connected to said flip-flop means to record said changes in switch position simultaneously with the recording of magnetic marks on said recording medium.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |