US4007691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke marker
Assignee: United States Department of the Navy
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Filing: 1975-12-23
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Granted: 1977-02-15
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Expires: 1995-12-23
Abstract
Abstract A smoke marker for indicating the location of a target drone. An aluminum tube with one open end and one closed end contains a polyethylene bottle filled with titanium tetrachloride, a smoke chemical. The bottle is held in place within the tube by means of set screws adjacent the bottle's neck. A nylon washer containing an explosive primer and a metallic disc are disposed between the bottle and the closed end of the tube. The open end of the tube is potted closed with styrofoam potting. Upon ignition, the explosive primer forces the copper disc to collapse the bottom of the bottle. The neck of the bottle shears and the titanium tetrachloride is expelled from the aluminum tube and the bottle, creating a 25 to 30 foot cloud of smoke.
Inventors
- 👤 Frederick L. Haake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:50
CPC Classifications
F; F42; F42B; F42B4/00; F42B4/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A smoke marker comprising: a. a seamless tubular housing having one closed end and one open end, said housing being fabricated from an explosive-proof material; b. a closed, collapsible, tubular container having a neck portion, said tubular container being disposed in said tubular housing, said container being filled with a column of smoke generating chemical; c. means abutting said neck portion of said tubular container for rigidly attaching said tubular container to said tubular housing and for shearing said neck portion of said tubular container from said tubular container when a sufficient force is applied to said column of smoke generating chemical; d. means disposed between said tubular container and said closed end of said tubular housing for generating and applying said sufficient force to said column of smoke generating chemical such that said neck portion of said tubular container and said column of smoke generating chemical are ejected from said tubular container.
Claim 2
Dependent Claim
153 words
A smoke marker comprising: a. a seamless tubular housing having one closed end and one open end, said housing being fabricated from an explosive-proof material; b. a closed, collapsible, tubular container having a neck portion, said tubular container being disposed in said tubular housing, said container being filled with a column of smoke generating chemical; c. means abutting said neck portion of said tubular container for rigidly attaching said tubular container to said tubular housing and for shearing said neck portion of said tubular container from said tubular container when a sufficient force is applied to said column of smoke generating chemical; d. means disposed between said tubular container and said closed end of said tubular housing for generating and applying said sufficient force to said column of smoke generating chemical such that said neck portion of said tubular container and said column of smoke generating chemical are ejected from said tubular container.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 wherein said tubular container includes a polyethylene bottle having a neck portion with a cap attaching thereto.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein said attaching means includes a plurality of set screws disposed in abutting relationship to said bottle neck.
Claim 5
Dependent Claim
94 words
The apparatus of claim 1 wherein said forcing means includes: a. a metallic member adjacent said tubular container; b. means disposed between said metallic member and said closed end of said tubular housing for holding an explosive primer; c. means communicating with said explosive primer for igniting said explosive primer forcing said metallic member to collapse said tubular container placing a force on said chemical, causing said tubular container to shear adjacent said open end of said tubular housing, whereby said smoke generating chemical is expelled through said open end of said tubular housing.
Claim 6
Dependent Claim
13 words
The apparatus of claim 4 wherein said metallic member includes a metallic disc.
Claim 7
Dependent Claim
23 words
The apparatus of claim 4 wherein said explosive primer holding means includes a nylon washer having a slot therein containing said explosive primer.
Claim 8
Dependent Claim
23 words
The apparatus of claim 4 wherein said igniting means includes a pair of wires extending from said explosive primer through said tubular housing.
Claim 9
Dependent Claim
25 words
The apparatus of claim 4 wherein said tubular container includes a bottle having a neck portion with a cap attaching thereto and a bottom portion.
Claim 10
Dependent Claim
66 words
The apparatus of claim 8 wherein said attaching means includes a plurality of set screws disposed in abutting relationship to said bottle neck, said igniting means exploding said explosive primer, forcing said metallic member to collapse the bottom of said bottle, transmitting a force to said chemical, said force shearing the neck of said bottle, whereby said smoke generating chemical is expelled from said tubular housing.
Claim 11
Dependent Claim
31 words
The apparatus of claim 1 further comprising potting material disposed in said open end of said tubular housing adjacent said neck portion of said tubular container for sealing said tubular housing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |