Patent US1556983A successfully refreshed from Google Patents.
Patent US4006687A successfully refreshed from Google Patents.
US4006687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safe detonator device
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1974-11-15
•
Granted: 1977-02-08
•
Expires: 1994-11-15
Abstract
Abstract A detonator device comprising an initiator located in contact with an insensitive liquid component of a two-component liquid explosive composition in a container, the container having ullage space for the subsequent addition of a second liquid component, and being sufficiently strong to contain the pressure of any premature detonation of the initiator.
Inventors
- 👤 John Jerold Ridgeway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:42
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/195; C; C06; C06B; C06B47/00; Y; Y10; Y10S; Y10S102/00; Y10S102/705
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
179 words
In a detonator device an elongated container defining an elongated chamber, removable stopper means closing one end of said container, said stopper means having an outer end portion which projects outwardly of said container to facilitate removal of the stopper means, explosive initiator means located in the other end of the elongated chamber in contact with a first liquid component of a two-component liquid explosive composition, the space between said initiator means and said stopper constituting the major portion of said chamber and being essentially unobstructed except for said first liquid component and of such capacity to provide ullage space to enable a second liquid component, mixable with said first component to form the two-component liquid explosive, to be added upon removal of the stopper, to said first component and mixed therewith in the container, the strength of the container being sufficient to contain the pressure generated by the initiator means in the event of premature detonation thereof and to transmit said pressure to the stopper so that the latter and the first component are expelled from the container.
Claim 2
Dependent Claim
179 words
In a detonator device an elongated container defining an elongated chamber, removable stopper means closing one end of said container, said stopper means having an outer end portion which projects outwardly of said container to facilitate removal of the stopper means, explosive initiator means located in the other end of the elongated chamber in contact with a first liquid component of a two-component liquid explosive composition, the space between said initiator means and said stopper constituting the major portion of said chamber and being essentially unobstructed except for said first liquid component and of such capacity to provide ullage space to enable a second liquid component, mixable with said first component to form the two-component liquid explosive, to be added upon removal of the stopper, to said first component and mixed therewith in the container, the strength of the container being sufficient to contain the pressure generated by the initiator means in the event of premature detonation thereof and to transmit said pressure to the stopper so that the latter and the first component are expelled from the container.
Claim 3
Dependent Claim
16 words
A device as claimed in claim 1 wherein the said first liquid component comprises a nitroparaffin.
Claim 4
Dependent Claim
12 words
A device as claimed in claim 2 wherein the nitroparaffin comprises nitromethane.
Claim 5
Dependent Claim
20 words
A device as claimed in claim 1 wherein the initiator means comprises lead azide and electrically actuated ignition means thereof.
Claim 6
Dependent Claim
27 words
A device as claimed in claim 4 wherein the initiator means comprises 70 to 100 milligrams of lead azide and the said first liquid component is nitromethane.
Claim 7
Dependent Claim
21 words
A device as claimed in claim 4 wherein the lead azide is compressed to a pressure of 15,000 to 20,000 psi.
Claim 8
Dependent Claim
17 words
A device as claimed in claim 4 wherein the lead azide is contained in a metal cup.
Claim 9
Dependent Claim
35 words
A strong detonator for blasting explosives comprising a device as claimed in claim 1 having a second liquid component admixed with the said first liquid component to form a liquid explosive composition within the device.
Claim 10
Dependent Claim
17 words
A detonator as claimed in claim 8 wherein the said second liquid component comprises a liquid amine.
Claim 11
Dependent Claim
23 words
A detonator as claimed in claim 9 wherein the liquid amine is selected from the group consisting of hydrazine, benzylamine and ehtylene diamine.
Claim 12
Dependent Claim
17 words
A detonator as claimed in claim 8 comprising additionally a delayed acting sterilising agent in said chamber.
Claim 13
Dependent Claim
28 words
A detonator as claimed in claim 11 wherein the first liquid component comprises nitroparaffin, the second liquid component comprises hydrazine and the delayed acting sterilising agent comprises diethylenetriamine.
Claim 14
Dependent Claim
69 words
A method of providing a strong detonator at a blasting site, which method comprises transporting to the site a detonator device as claimed in claim 1 and adding to the said first liquid component, and mixing therewith in the said container, a second liquid component to produce a liquid explosive composition within the said container, said liquid explosive composition being detonatable by the initiator means of the detonator device.
Claim 15
Dependent Claim
36 words
A method as claimed in claim 13 wherein the second liquid component is packed in the individual amount appropriate for addition to an individual detonator device and transported to the site together with the detonator device.
Claim 16
Dependent Claim
28 words
A method as claimed in claim 14 wherein the detonator device and an appropriate amount of said second liquid component are packaged in a two-component package for transport.
Claim 17
Dependent Claim
22 words
A method as claimed in claim 13 wherein one or both said liquid components has incorporated therein a delayed acting sterilising agent.
Claim 18
Dependent Claim
30 words
A method as claimed in claim 13 wherein the first liquid component in the detonator device in nitroparaffin and the second liquid component comprises a mixture of hydrazine and diethylenetriamine.
Claim 19
Dependent Claim
45 words
A two-component package comprising, in one component, a detonator device as claimed in claim 1 and, in a second component, a quantity of liquid which, when added to the liquid in the device of the first component and mixed therewith, produces a liquid explosive composition.
Claim 20
Dependent Claim
61 words
A detonator device as in claim 1 wherein said explosive initiator means includes 70 to 100 milligrams of lead azide compressed by a pressure of 15,000 to 20,000 psi and contained in a metal cup and electrically actuated ignition means for the lead azide, and wherein said first liquid component includes nitromethane and is incapable of ignition by said initiator means.
Claim 21
Dependent Claim
110 words
A detonator device comprising electrically actuated explosive initiator means located in a container in contact with a liquid explosive composition which is detonatable by said initiator means, said composition being a mixture of a first liquid component which is incapable of ignition by said initiator means with a second liquid component and with a delayed acting sterilizing agent, said container being of such capacity to provide ullage space to enable said second liquid component to be added to said first component and mixed therewith in the container, the strength of the container being sufficient to contain the pressure generated by the initiator means in the event of premature detonation thereof.
Claim 22
Dependent Claim
110 words
A detonator device comprising electrically actuated explosive initiator means located in a container in contact with a liquid explosive composition which is detonatable by said initiator means, said composition being a mixture of a first liquid component which is incapable of ignition by said initiator means with a second liquid component and with a delayed acting sterilizing agent, said container being of such capacity to provide ullage space to enable said second liquid component to be added to said first component and mixed therewith in the container, the strength of the container being sufficient to contain the pressure generated by the initiator means in the event of premature detonation thereof.
Claim 23
Dependent Claim
27 words
A detonator as in claim 20 wherein the first liquid component comprises nitroparaffin, the second liquid component comprises hydrazine and the delayed acting sterilising agent comprises diethylenetriamine.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |