choke ring

choke ring

[′chōk ‚riŋ]
(ordnance)
Metal ring used in the reaction chambers of certain recoilless weapons to control gas escape; the same function is carried out by throat rings, throat blocks, and restricting plugs in other types of recoilless weapons.
References in periodicals archive ?
It is composed of choke a choke ring antenna, a FOIF A100 CORS receiver, and a GNSS Receiver.
In [13,14], single-band ([L.sub.1]) GPS antennas based on the RSW concept were designed and shown to provide comparable multipath performance to the choke ring and pinwheel antennas.
Number of Receiver Antenna stations 72 Trimble NetRS Trimble Zephyr Geodetic w/Radome (TRM41249.00 TZGD) 12 Ashtech Micro Ashtech L1/L2 Choke Z (ASHTECH Ring SNOW (ASH701945C UZ-12) M SNOW-D/M element, REV.C, chokering with radome NGS) 8 Trimble NetR5 Trimble Zephyr GNSS Geodetic II w/Radome (TRM55971.00 TZGD) 4 Leica GRX1200 GG Pro Leica L1/L2 Choke Ring, using DM-T style (LEIAT504GG LEIS) 1 Javad JPS E GGD Ashtech L1/L2 Choke Ring SNOW (ASH701945C M SNOW-D/M element, REV.C, chokering with radome NGS) 1 Trimble NetRS Dorne Margolin T Choke Ring (AOAD/M T NONE)
Shooting my own Dead Ringer, which was thought to be a wad stop design with a full 360-degree interior choke ring, the payload becomes trapped while still encased in the plastic wad because the edges of the wad pedals hit the ring and turn inward, developing a crimp of sorts that hold the shot inside of the wad.
GPS 600 Series Antenna is a dual frequency antenna that achieves less than 1 millimeters offset between L1 and L2 phase centers without a choke ring by replacing conventional patch antenna designs with NovAtel's patent pending Pinwheel Technology -- an aperture coupled slot array configuration.
Relative calibrations of single antennas are performed with respect to reference antenna Leica AT504 (LEIAT504) with choke ring construction elements, which has similar receiving parameters as the generally used Dorne Margolin type T antenna (AOAD/MT).