US3967555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric fuze, especially for projectiles
Assignee: Dynamit Nobel AG
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Filing: 1974-03-15
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Granted: 1976-07-06
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Expires: 1994-03-15
Abstract
Abstract A piezoelectric fuze, especially for projectiles, having a piezoelectric element which converts the mechanical shockwave produced upon impact on a target into an output signal for igniting a detonator. A control circuit is provided for generating an output signal and a threshold switching circuit is provided for receiving the outputs of the control circuit and the piezoelectric element as a superimposed signal for establishing a connection between a power source and a detonator of the fuze when the threshold value of the threshold circuit is exceeded.
Inventors
- 👤 Heinz Gawlick
- 👤 Uwe Brede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:45
CPC Classifications
F; F42; F42C; F42C11/00; F42C11/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
134 words
A piezoelectric fuze, especially for projectiles, comprising power source means, detonator means, threshold switch means having a threshold value, piezoelectric element means for converting the mechanical shock wave produced upon impingement of the fuze onto a target into an electrical output signal for at least aiding in overcoming the threshold value of the threshold switch means, and at least a first control means for controlling the ignition of said detonator means, said first control means providing an electrical output signal for overcoming the threshold value of the threshold switch means, said threshold switch means being responsive to the output signals of said piezoelectric means and said first control means for establishing a connection between said power source means and said detonator means for igniting said detonator means when the threshold value thereof is exceeded.
Claim 2
Dependent Claim
134 words
A piezoelectric fuze, especially for projectiles, comprising power source means, detonator means, threshold switch means having a threshold value, piezoelectric element means for converting the mechanical shock wave produced upon impingement of the fuze onto a target into an electrical output signal for at least aiding in overcoming the threshold value of the threshold switch means, and at least a first control means for controlling the ignition of said detonator means, said first control means providing an electrical output signal for overcoming the threshold value of the threshold switch means, said threshold switch means being responsive to the output signals of said piezoelectric means and said first control means for establishing a connection between said power source means and said detonator means for igniting said detonator means when the threshold value thereof is exceeded.
Claim 3
Dependent Claim
88 words
A fuze according to claim 1, further comprising a detonator head member for attachment at the forward end of the projectile, said piezoelectric element means being secured at the tip of said detonator head member, said at least first control means and said threshold switch means having the electrical components thereof positioned in said detonator head member, said detonator head member being provided with a wall portion separating said piezoelectric element means from said electrical components of said at least first control means and said threshold switch means.
Claim 4
Dependent Claim
35 words
A fuze according to claim 2, wherein said power source means is positioned in said detonator head member rearwardly of said electrical components of said at least first control means and said threshold switch means.
Claim 5
Dependent Claim
125 words
A piezoelectric fuze, especially for projectiles, comprising power source means, detonator means, piezoelectric element means for converting the mechanical shock wave produced upon impingement of the fuze onto a target into an electrical output signal, threshold switch means, and at least a first control means for controlling the ignition of said detonator means, said first control means providing an electrical output signal, said threshold switch means being responsive to the output signals of said piezoelectric means and said first control means for establishing a connection between said power source means and said detonator means for igniting said detonator means when the threshold value thereof is exceeded, the threshold value of said threshold switch means being above the maximum output signal of said piezoelectric element means.
Claim 6
Dependent Claim
125 words
A piezoelectric fuze, especially for projectiles, comprising power source means, detonator means, piezoelectric element means for converting the mechanical shock wave produced upon impingement of the fuze onto a target into an electrical output signal, threshold switch means, and at least a first control means for controlling the ignition of said detonator means, said first control means providing an electrical output signal, said threshold switch means being responsive to the output signals of said piezoelectric means and said first control means for establishing a connection between said power source means and said detonator means for igniting said detonator means when the threshold value thereof is exceeded, the threshold value of said threshold switch means being above the maximum output signal of said piezoelectric element means.
Claim 7
Dependent Claim
46 words
A fuze according to claim 4, wherein said first control means provides an output signal which is superimposed on the output signal of said piezoelectric element means to provide a superimposed signal having a total value for exceeding the threshold value of said threshold switch means.
Claim 8
Dependent Claim
24 words
A fuze according to claim 5, wherein said first control means provides an output signal having a value which increases in accordance with time.
Claim 9
Dependent Claim
19 words
A fuze according to claim 3, wherein said first control means provides an output signal after a predetermined delay.
Claim 10
Dependent Claim
41 words
A fuze according to claim 5, wherein said threshold switch means is provided with a control input and said piezoelectric element means and said first control means have the outputs thereof connected to the control input of said threshold switch means.
Claim 11
Dependent Claim
37 words
A fuze according to claim 8, wherein said first control means comprises an RC circuit having the output thereof connected to the output of said piezoelectric element means and the control input of said threshold switch means.
Claim 12
Dependent Claim
51 words
A fuze according to claim 5, wherein said first control means provides an output signal which increases in value and which attains the threshold value of said threshold switch means after a predetermined delay period so as to insure ignition of said detonator means after the predetermined delay period has elapsed.
Claim 13
Dependent Claim
34 words
A fuze according to claim 4, further comprising firing switch means responsive to the firing of the projectile for establishing a connection between said power source means and said at least first control means.
Claim 14
Dependent Claim
25 words
A fuze according to claim 11, wherein said firing switch means also establishes a connection between said power source means and said threshold switch means.
Claim 15
Dependent Claim
45 words
A fuze according to claim 12, further comprising at least a second control means for controlling the ignition of said detonator means predetermined time intervals, said firing switch means also establishing a connection between said power source means and said at least second control means.
Claim 16
Dependent Claim
41 words
A fuze according to claim 10, wherein said threshold switch means is provided with a control input and said piezoelectric element means and said first control means have the outputs thereof connected to the control input of said threshold switch means.
Claim 17
Dependent Claim
46 words
A fuze according to claim 14, wherein said threshold switch means includes a thyristor having a control electrode and a diode connected to the control electrode in the blocking direction thereof, said diode and said control electrode forming said control input of said threshold switch means.
Claim 18
Dependent Claim
34 words
A fuze according to claim 15, further comprising firing switch means responsive to the firing of the projectile for establishing a connection between said power source means and said at least first control means.
Claim 19
Dependent Claim
25 words
A fuze according to claim 16, wherein said firing switch means also establishes a connection between said power source means and said threshold switch means.
Claim 20
Dependent Claim
46 words
A fuze according to claim 17, further comprising at least a second control means for controlling the ignition of said detonator means during predetermined time intervals, said firing switch means also establishing a connection between said power source means and said at least second control means.
Claim 21
Dependent Claim
85 words
A fuze accordiing to claim 13, further comprising a detonator head member for attachment at the forward end of the projectile, said piezoelectric element means being secured at the tip of said detonator head member, said at least first control means and said threshold switch means having the electrical components thereof positioned in said detonator head member, said detonator head member being provided with a wall portion separating said piezoelectric element means from said electrical components of said control means and said threshold switch means.
Claim 22
Dependent Claim
32 words
A fuze according to claim 19, wherein said power source means is positioned in said detonator head member rearwardly of said electrical components of said control means and said threshold switch means.
Claim 23
Dependent Claim
133 words
A piezoelectric fuze especially for projectiles, comprising power source means, detonator means, piezoelectric element means for converting the mechanical shock wave produced upon impingement of the fuze onto a target into an electrical output signal, threshold switch means, and at least a first control means for controlling the ignition of said detonator means, said first control means providing an electrical output signal, said threshold switch means being responsive to the output signals of said piezoelectric means and said first control means for establishing a connection between said power source means and said detonator means for igniting said detonator means when the threshold value thereof is exceeded, said first control means being arranged for providing an output signal having at least a final value which exceeds the threshold value of said threshold switch means.
Claim 24
Dependent Claim
133 words
A piezoelectric fuze especially for projectiles, comprising power source means, detonator means, piezoelectric element means for converting the mechanical shock wave produced upon impingement of the fuze onto a target into an electrical output signal, threshold switch means, and at least a first control means for controlling the ignition of said detonator means, said first control means providing an electrical output signal, said threshold switch means being responsive to the output signals of said piezoelectric means and said first control means for establishing a connection between said power source means and said detonator means for igniting said detonator means when the threshold value thereof is exceeded, said first control means being arranged for providing an output signal having at least a final value which exceeds the threshold value of said threshold switch means.
Claim 25
Dependent Claim
48 words
A fuze according to claim 21 wherein said first control means provides an output signal of varying value with at least the final value being sufficient to exceed the threshold value of said threshold switch means independently of the value of the output signal of said piezoelectric means.
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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |