US3865028A
Expired / Lapsed
US
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Energy tester for testing blasting machines that detonate electro-explosive devices
Assignee: Honeywell International Inc
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Filing: 1972-12-26
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Granted: 1975-02-11
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Expires: 1992-12-26
Abstract
Abstract An apparatus for testing the energy output of a blasting machine used for detonating electro-explosive devices to determine if the blasting machine will supply sufficient energy to detonate the electro-explosive devices. The tester is capable of determining within plus or minus one Joule the output of a 25 Joule blasting machine. The energy tester includes go and no-go indicator lights to inform the operator of the blasting machine whether or not he has sufficient energy.
Inventors
- 👤 Kaushik H Thakore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:37
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/16585; F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05; G01L; G01L5/00; G01L5/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
157 words
Apparatus comprising a blasting machine of the type that discharges energy stored in a capacitor to initiate a plurality of electro-explosive devices, means for indicating when said energy discharged from said blasting machine is above a predetermined energy value, said means comprising: circuit means including a series connected resistor and capacitor for receiving said energy discharged from said blasting machine and for producing a first signal which is related to the amount of energy discharged; means for generating a reference signal which is related to a predetermined amount of energy; means for comparing said reference signal to said first signal and generating a third signal when said amount of energy discharged from said blasting machine is not less than said predetermined amount of energy; and means responsive to said third signal for indicating the presence of said third signal, whereby said indicating means indicates that the energy discharged from said blasting machine is above said predetermined amount.
Claim 2
Dependent Claim
157 words
Apparatus comprising a blasting machine of the type that discharges energy stored in a capacitor to initiate a plurality of electro-explosive devices, means for indicating when said energy discharged from said blasting machine is above a predetermined energy value, said means comprising: circuit means including a series connected resistor and capacitor for receiving said energy discharged from said blasting machine and for producing a first signal which is related to the amount of energy discharged; means for generating a reference signal which is related to a predetermined amount of energy; means for comparing said reference signal to said first signal and generating a third signal when said amount of energy discharged from said blasting machine is not less than said predetermined amount of energy; and means responsive to said third signal for indicating the presence of said third signal, whereby said indicating means indicates that the energy discharged from said blasting machine is above said predetermined amount.
Claim 3
Dependent Claim
112 words
The combination as recited in claim 1, wherein said means for generating a reference signal which is related to a predetermined amount of energy comprises a trigger circuit responsive to the receipt of an output energy pulse from said blasting machine, said trigger circuit having an input resistance greater than 1 million ohms and means for generating a trigger pulse upon receipt of said blasting machine output energy pulse; and a monostable multivibrator, having input means for receiving said trigger circuit pulse and output means for producing a pulse having a fixed magnitude in response to said trigger circuit pulse; and wherein said first signal increases in magnitude with respect to time.
Claim 4
Dependent Claim
26 words
The combination as recited in claim 1 wherein said energy receiving means includes means for dissipating substantially all of said energy received from said blasting machine.
Claim 5
Dependent Claim
26 words
The combination as recited in claim 2 wherein said energy receiving means includes means for dissipating substantially all of said energy received from said blasting machine.
Claim 6
Dependent Claim
31 words
The combination as recited in claim 3 wherein said energy dissipating means includes a resistor having a resistance at least three decades less than the input resistance of said trigger circuit.
Claim 7
Dependent Claim
31 words
The combination as recited in claim 4 wherein said energy dissipating means includes a resistor having a resistance at least three decades less than the input resistance of said trigger circuit.
Claim 8
Dependent Claim
30 words
The combination as recited in claim 1 wherein said indicator means includes a first light that illuminates for a predetermined period of time in the absence of said third signal.
Claim 9
Dependent Claim
30 words
The combination as recited in claim 2 wherein said indicator means includes a first light that illuminates for a predetermined period of time in the absence of said third signal.
Claim 10
Dependent Claim
30 words
The combination as recited in claim 3 wherein said indicator means includes a first light that illuminates for a predetermined period of time in the absence of said third signal.
Claim 11
Dependent Claim
30 words
The combination as recited in claim 4 wherein said indicator means includes a first light that illuminates for a predetermined period of time in the absence of said third signal.
Claim 12
Dependent Claim
30 words
The combination as recited in claim 5 wherein said indicator means includes a first light that iLluminates for a predetermined period of time in the absence of said third signal.
Claim 13
Dependent Claim
30 words
The combination as recited in claim 7 wherein said indicator means includes a second light that illuminates for a predetermined period of time in the presence of said third signal.
Claim 14
Dependent Claim
30 words
The combination as recited in claim 8 wherein said indicator means includes a second light that illuminates for a predetermined period of time in the presence of said third signal.
Claim 15
Dependent Claim
30 words
The combination as recited in claim 9 wherein said indicator means includes a second light that illuminates for a predetermined period of time in the presence of said third signal.
Claim 16
Dependent Claim
30 words
The combination as recited in claim 10 wherein said indicator means includes a second light that illuminates for a predetermined period of time in the presence of said third signal.
Claim 17
Dependent Claim
30 words
The combination as recited in claim 11 wherein said indicator means includes a second light that illuminates for a predetermined period of time in the presence of said third signal.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |