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US3915043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable or other line cutting devices
Assignee: Australian Government
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Filing: 1974-02-25
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Granted: 1975-10-28
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Expires: 1994-02-25
Abstract
Abstract A CABLE CUTTING DEVICE for mounting upon a crop-dusting aircraft to sever electric cables in the event of collision therewith includes a guide for guiding a cable into a cutting zone, and a trigger actuated by the cable entering the cutting zone and operable to activate an explosively driven blade to sever the cable in the cutting zone.
Inventors
- 👤 William Ronald Smith
- 👤 Sydney Langford Howlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:43
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/006; B26; B26D; B26D5/00; B26D5/38; Y; Y10; Y10T; Y10T83/00; Y10T83/525; Y10T83/527; Y10T83/528; Y10T83/541; Y10T83/869; Y10T83/8772; Y10T83/8821; Y10T83/8858; Y10T83/8863
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
A device for severing a substantially horizontal line responsive to relative bodily movement between the device and the line, said device comprising, in combination, means forming a cutting zone; guide means operable to guide a line into said cutting zone; trigger means actuable responsive to movement of a line into said cutting zone; severing means operatively associated with said trigger means and operable, responsive to actuation of said trigger means, to sever the line in said cutting zone; and delay means operatively associated with said trigger means and said severing means and operable to delay operation of said severing means for a predetermined period following actuation of said trigger means to sever a line entering into said cutting zone.
Claim 2
Independent Claim
119 words
A device for severing a substantially horizontal line responsive to relative bodily movement between the device and the line, said device comprising, in combination, means forming a cutting zone; guide means operable to guide a line into said cutting zone; trigger means actuable responsive to movement of a line into said cutting zone; severing means operatively associated with said trigger means and operable, responsive to actuation of said trigger means, to sever the line in said cutting zone; and delay means operatively associated with said trigger means and said severing means and operable to delay operation of said severing means for a predetermined period following actuation of said trigger means to sever a line entering into said cutting zone.
Claim 3
Dependent Claim
19 words
A device as claimed in claim 1, in which said predetermined period is of the order of 0.15 seconds.
Claim 4
Dependent Claim
41 words
A device as claimed in claim 1, wherein said guide means includes a pair of guides which are convergent towards said cutting zone such that a line, on contact with one of said guides, will slide therealong into said cutting zone.
Claim 5
Dependent Claim
21 words
A device as claimed in claim 3, wherein said guides are formed as edges of a pair of coplanar plate portions.
Claim 6
Dependent Claim
68 words
A device for severing a line, as claimed in claim 1, in which said severing means comprises a barrel, a charge of explosive material in said barrel initiated responsive to actuation of said trigger means, and a cutting element mounted within said barrel; said cutting element being accelerated toward the line in said cutting zone, responsive to initiation of said charge of exPlosive material, to sever the line.
Claim 7
Dependent Claim
89 words
A device as claimed in claim 5, wherein said guide means includes a pair of guides which are convergent toward said cutting zone such that a line, on contact with one of said guides, will slide therealong into said cutting zone; said guides being formed as edges of a pair of coplanar plate portions; said barrel being mounted on one of said plate portions, and the other of said plate portions carrying an anvil serving as a reaction surface for said cutting element, to facilitate severing of the line.
Claim 8
Dependent Claim
56 words
A device as claimed in claim 5, wherein said trigger means includes a percussion initiated charge, a striker pin and a latch, said pin being coupled to the latch, said latch being displaced on entry of a line into said zone to release the pin therefrom enabling the striker pin to initiate said percussion initiated charge.
Claim 9
Dependent Claim
27 words
A device as claimed in claim 7, wherein said cutting element includes a recess for housing said explosive charge, said percussion ignitable charge and said striker pin.
Claim 10
Dependent Claim
75 words
A device as claimed in claim 8, wherein said striker pin is encircled by a normally un-compressed compression spring, and said latch is so shaped to as to move the striker pin away from the percussion initiated charge to thereby compress the compression spring prior to release of said striker pin by the latch, whereby said compression spring resiliently urges said striker pin to impact the percussion initiated charge after release of the striker pin.
References Cited (Backward Citations)
US2335952A
Cited
US2396707A
Cited
US2420987A
Cited
US3817200A
Cited
US3780689A
Cited
US3760674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |