US2995089A - Antenna for proximity fuse - Google Patents
Antenna for proximity fuse Download PDFInfo
- Publication number
- US2995089A US2995089A US124522A US12452249A US2995089A US 2995089 A US2995089 A US 2995089A US 124522 A US124522 A US 124522A US 12452249 A US12452249 A US 12452249A US 2995089 A US2995089 A US 2995089A
- Authority
- US
- United States
- Prior art keywords
- antenna
- ring
- nose
- fuse
- proximity fuse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920005479 Lucite® Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
Definitions
- This invention relates to an antenna for a proximity fuse of the type which is mounted on the nose of a missile such as a bomb.
- a known type of electric proximity fuse is provided with a ring antenna, as shown, for example, in Research Paper RP 1723, vol. 37, July 1946, of The National Bureau of Standards, pages and 6.
- This is an exposed circular antenna rigidly mounted on the nose of the fuse so that it projects out ahead of the missile.
- This type of antenna is in general quite satisfactory, but it has been found that under some conditions fuses so equipped do not function satisfactorily. We have ascertained this to be caused by detuning of the tuned circuit, apparently caused by a layer of dirty water on the body of the missile. This is believed, to in effect, extend the missile 'body closer to the antenna ring, thus greatly increasing the antenna to counterpoise (body) capacity.
- FIG. 1 is a perspective view of a combined nose cap and antenna according to our invention
- FIG. 2 is a sectional view taken on line 2-2 of FIG. 1;
- FIG. 3 is a sectional view taken on line 3--3 of FIG. 1.
- the device is provided with the usual rounded nose cap portion 1, of a suitable ice molded plastic, such for example as Lucite. Holes 12 are provided in the cap 1 to enable mounting on the nose of a fuse. Integral with cap portion 1 are upstanding fins 2 which support ring 3, all integrally molded of the same material. Imbedded in ring 3 is antenna 4, also of ring shape, and having a lead 6 running from the antenna 4 inside one of the fins 2 and then bending at right angles as at 7 so that a free end thereof extends into the nose of the fuse for connection to the electric circuit thereof. It will be evident that the complete device may be molded in one simple operation to provide an inexpensive constant-capacity antenna which is free from undesirable detuning under practical conditions encountered in service.
- a constant capacity ring antenna device adapted to be mounted on the nose of a proximity fuze missile, said ring antenna device comprising in combination: a plastic rounded nose cap portion having holes therein to enable mounting on the proximity fuze nose; upstanding plastic fins integral with said cap portion and extending transversely forward thereof; a plastic ring integrally supported on said fins and projecting out ahead of said cap portion; a ring antenna completey embedded in said plastic ring; and an antenna lead transversely running from said antenna inside one of said fins and then bending at right angles through said nose cap portion so that the free end of said lead can be electrically connected to said fuze; said cap portion, said fins, and said ring being integrally molded of the same plastic material with said ring antenna and said lead embedded therein.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Details Of Aerials (AREA)
Description
Aug. 8, 1961 c. J. CUSTER ET AL 2,995,089 I ANTENNA FOR PROXIM'ITY FUSE Filed Oct. 51. 1949 WTHIIM l 1,. W i w L F1 :3. i- 2 4 5 l ll gym 0mm CHARLES J- Bus-FER ANDREW L. .HEIF'FER United States Patent 2,995,089 ANTENNA FOR PROXIMITY FUSE Charles J. Custer, Plainfield, and Andrew L. Hopper,
Summit, NJ., assignors, by mesne assignments, to the United States of America as represented by the Secretary of the Army Filed Oct. 31, 1949, Ser. No. 124,522 1 Claim. (Cl. 102-702) This invention relates to an antenna for a proximity fuse of the type which is mounted on the nose of a missile such as a bomb.
A known type of electric proximity fuse is provided with a ring antenna, as shown, for example, in Research Paper RP 1723, vol. 37, July 1946, of The National Bureau of Standards, pages and 6. This is an exposed circular antenna rigidly mounted on the nose of the fuse so that it projects out ahead of the missile. This type of antenna is in general quite satisfactory, but it has been found that under some conditions fuses so equipped do not function satisfactorily. We have ascertained this to be caused by detuning of the tuned circuit, apparently caused by a layer of dirty water on the body of the missile. This is believed, to in effect, extend the missile 'body closer to the antenna ring, thus greatly increasing the antenna to counterpoise (body) capacity.
It is a primary object of our invention to correct this situation by providing an improved antenna and nose cap construction for the proximity fuse, in which the antenna is molded into a thick layer of plastic insulating material. This greatly reduces the capacity variation between the dry and the wet condition, because the capacity between the ring and any conducting or semi-conducting layer of moisture will decrease as it is moved further from the surfaces which can be affected thereby.
The specific nature of the invention, as well as other objects and advantages thereof, will clearly appear from a description of a preferred embodiment as shown in the accompanying drawing, in which:
FIG. 1 is a perspective view of a combined nose cap and antenna according to our invention;
FIG. 2 is a sectional view taken on line 2-2 of FIG. 1;
FIG. 3 is a sectional view taken on line 3--3 of FIG. 1.
Referring to the drawings, the device is provided with the usual rounded nose cap portion 1, of a suitable ice molded plastic, such for example as Lucite. Holes 12 are provided in the cap 1 to enable mounting on the nose of a fuse. Integral with cap portion 1 are upstanding fins 2 which support ring 3, all integrally molded of the same material. Imbedded in ring 3 is antenna 4, also of ring shape, and having a lead 6 running from the antenna 4 inside one of the fins 2 and then bending at right angles as at 7 so that a free end thereof extends into the nose of the fuse for connection to the electric circuit thereof. It will be evident that the complete device may be molded in one simple operation to provide an inexpensive constant-capacity antenna which is free from undesirable detuning under practical conditions encountered in service.
It will be understood that the invention is not limited to an antenna of the precise shape and configuration shown, but may be constructed to provide an antenna of any suitable shape within the scope of the appended claim.
We claim:
A constant capacity ring antenna device adapted to be mounted on the nose of a proximity fuze missile, said ring antenna device comprising in combination: a plastic rounded nose cap portion having holes therein to enable mounting on the proximity fuze nose; upstanding plastic fins integral with said cap portion and extending transversely forward thereof; a plastic ring integrally supported on said fins and projecting out ahead of said cap portion; a ring antenna completey embedded in said plastic ring; and an antenna lead transversely running from said antenna inside one of said fins and then bending at right angles through said nose cap portion so that the free end of said lead can be electrically connected to said fuze; said cap portion, said fins, and said ring being integrally molded of the same plastic material with said ring antenna and said lead embedded therein.
References Cited in the file of this patent UNITED STATES PATENTS Roberts Apr. 13, 1943 Ohlendorf Aug. 12, 1947 OTHER REFERENCES
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US124522A US2995089A (en) | 1949-10-31 | 1949-10-31 | Antenna for proximity fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US124522A US2995089A (en) | 1949-10-31 | 1949-10-31 | Antenna for proximity fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2995089A true US2995089A (en) | 1961-08-08 |
Family
ID=22415362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US124522A Expired - Lifetime US2995089A (en) | 1949-10-31 | 1949-10-31 | Antenna for proximity fuse |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2995089A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780661A (en) * | 1972-06-30 | 1973-12-25 | Us Army | Protective metal cap for plastic fuze radomes |
| US20050030234A1 (en) * | 2002-10-16 | 2005-02-10 | Trw Automotive Electronics & Components Gmbh & Co. Kg | Air vent |
| US10935357B2 (en) | 2018-04-25 | 2021-03-02 | Bae Systems Information And Electronic Systems Integration Inc. | Proximity fuse having an E-field sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2316623A (en) * | 1940-06-29 | 1943-04-13 | Rca Corp | Loop antenna system |
| US2425558A (en) * | 1943-03-17 | 1947-08-12 | Gerhard G Ohlendorf | Direction control device |
-
1949
- 1949-10-31 US US124522A patent/US2995089A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2316623A (en) * | 1940-06-29 | 1943-04-13 | Rca Corp | Loop antenna system |
| US2425558A (en) * | 1943-03-17 | 1947-08-12 | Gerhard G Ohlendorf | Direction control device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780661A (en) * | 1972-06-30 | 1973-12-25 | Us Army | Protective metal cap for plastic fuze radomes |
| US20050030234A1 (en) * | 2002-10-16 | 2005-02-10 | Trw Automotive Electronics & Components Gmbh & Co. Kg | Air vent |
| US10935357B2 (en) | 2018-04-25 | 2021-03-02 | Bae Systems Information And Electronic Systems Integration Inc. | Proximity fuse having an E-field sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3070748A (en) | Portable radio receiver having inter-changeable means for using single-use and rechargeable batteries | |
| IE35112L (en) | Current control apparatus | |
| EP0385795A3 (en) | Blown fuse indicator | |
| US2995089A (en) | Antenna for proximity fuse | |
| US1535618A (en) | Flexible electromagnet | |
| US2809363A (en) | Electrical connectors | |
| ES196074U (en) | An electrical contact (Machine-translation by Google Translate, not legally binding) | |
| ATE58981T1 (en) | SECURITY ELEMENT. | |
| US2915737A (en) | Electrical power plug | |
| CN212570966U (en) | Triode with pin protection structure | |
| US2900909A (en) | Centrifugal switch | |
| US1489305A (en) | Combination club and searchlight | |
| US2373390A (en) | Portable electric lighting device | |
| NO115131B (en) | ||
| US2918517A (en) | Deferred action battery | |
| US2440401A (en) | Dry battery for hearing aids | |
| US1539385A (en) | Rattery plug | |
| US3394237A (en) | Omnidirectional inertial switch | |
| US1394101A (en) | Electric handlamp | |
| US3329788A (en) | Thermally controlled switch | |
| US1611772A (en) | Circuit breaker | |
| US1650421A (en) | Attachment plug | |
| US2164106A (en) | Test light | |
| US2764735A (en) | Fuse testing attachment for a flashlight | |
| US2840791A (en) | Mounting for plug-in units |