Author: claimsbot

1. A magazine assembly for firearm cartridges, comprising:
a plurality of side by side tubular members each capable of receiving a plurality of cartridges, the tubular members being non-displaceably fixed with respect to a firearm upon which the magazine assembly is mounted;
a generally hollow monoblock member, having a plurality of side-by-side, generally tubular portions extending therethrough and being axially coupled to an end of each of the tubular members, the monoblock providing a cartridge loading port and a cartridge feed port for each of the coupled tubular members;
a plurality of independent gate members pivotally mounted at an end region of the monoblock and each having a biased first blocking member near an opening of a corresponding one of the cartridge feed ports and into the feed path of an end cartridge, the gate members co-operable with a cocking portion of the firearm to displace one of the first blocking members from the feed path during actuation of the cocking portion; and
at least one cartridge interrupter pivotally mounted to the monoblock and located intermediate the cartridge feed ports, the cartridge interrupter having a pair of shouldered opposing sides and being pivotable to cause each shoulder to project into a corresponding feed port upon impingement of the opposing shoulder by a cartridge in one of the opposing tubular members for preventing the simultaneous feeding of cartridges from opposing feed ports during actuation of the cocking portion.
2. The magazine assembly as claimed in claim 1, which includes biasing means for urging the cartridges from the tubular members towards their corresponding feed ports of the monoblock, the biasing means being in the form of a cartridge follower housed in each of the tubular members and urged by a coil spring towards the feed ports of the monoblock.
3. The magazine assembly as claimed in claim 2, wherein the tubular members each have a longitudinal slot through which a handle of a cartridge follower projects.
4. The magazine assembly as claimed in claim 3, wherein the handle of the cartridge follower is actuable to fully compress the coil spring between a body portion of the cartridge follower and a front magazine cap.
5. The magazine assembly as claimed in claim 4, wherein the handle of the cartridge follower may be rotated into a locked position to retain the coil spring in a compressed state to relieve substantially all pressure from the coil spring during a loading of the firearm.
6. The magazine assembly as claimed in claim 1, wherein at least one of the pivoting gate members further comprises a seconding blocking member that projects into the tubular member and into the feed path of a second to the end cartridge during the cocking operation to prevent the ejection of more than one cartridge from a single tubular member when the first blocking member is displaced out of the feed path of the end cartridge.
7. The magazine assembly as claimed in claim 6, wherein the distance between first and second blocking portions is less than or equal to 1.5\u2033.
8. The magazine assembly as claimed in claim 1, further comprising a selector switch operable between a first position that permits cartridges to be fed alternately from each of the tubular members, to at least a second position wherein a portion of the selector switch projects into the feed path of cartridges in a selected tubular member thereby preventing the feeding of all cartridges from that tubular member for so long as the selector switch remains in that at least second position.
9. The magazine assembly as claimed in claim 1, wherein the firearm cartridges are shotgun cartridges.
10. The magazine assembly as claimed in claim 1 further including indicia means visible on a top side of the firearm for providing an indication of a number of cartridges remaining in either or both of the tube members.
11. The magazine assembly as claimed in claim 1 wherein each of said plurality of side by side tubular members is at least partially transparent to display the number of cartridges remaining in each respective tube.
12. The magazine assembly as claimed in claim 11 wherein each of said plurality of side by side tubular members are unslotted.
13. A shotgun having a magazine assembly comprising,
a dual tube magazine assembly comprising a plurality of side by side tubular members each capable of receiving and storing a plurality of cartridges, the tubular members being non-displaceably fixed with respect to the shotgun;
a generally hollow monoblock member, having a plurality of side-by-side, generally tubular portions extending therethrough and being axially coupled to an end of each of the tubular members, the monoblock providing a cartridge loading port and a cartridge feed port for each of the coupled tubular members;
a plurality of independent gate members pivotally mounted at an end region of the monoblock and each having a biased first blocking member near an opening of a corresponding one of the cartridge feed ports and pivotable into the feed path of an end cartridge, the gate members co-operable with a cocking portion of the shotgun to displace one of the first blocking members from the feed path during actuation of the cocking portion; and
at least one cartridge interrupter pivotally mounted to the monoblock and located intermediate the feed ports, the cartridge interrupter having a pair of opposing shouldered sides and being actuable to cause each shoulder to project into a corresponding feed port upon impingement of the opposing shoulder by a cartridge in the opposing feed port for preventing the simultaneous feeding of cartridges from opposing feed ports during actuation of the cocking portion;
guide rails within a receiver portion of the shotgun linearly aligned with the chamber portion of a gun barrel for receiving cartridges fed from the magazine assembly prior to being inserted into a chambered barrel of the firearm; and
a downwardly biased feed member centrally mounted rearward of the feed ports of the magazine assembly and movable between a upward, inoperative and downward, operative positions for urging linear alignment of the fed cartridges within the guide rails and axial alignment of the cartridges with the chamber of the barrel.
14. The shotgun as claimed in claim 13, wherein the feed member is maintained in its inoperative position by a reciprocally pivotable tripper mechanism located in the path of and triggered into its operative position by a cartridge being fed from the magazine assembly under pressure of a coil spring.
15. The shotgun as claimed in claim 13, wherein the feed member is re-biased in its inoperative, upward position following a complete cycling of the cocking mechanism.
16. The shotgun as claimed in claim 13 wherein each of said plurality of side by side tubular members of the dual tube magazine assembly is at least partially transparent to display the number of cartridges remaining in each respective tube.
17. The shotgun as claimed in claim 13 having a magazine assembly wherein each of said plurality of side by side tubular members of the magazine assembly are unslotted.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1.-13. (canceled)
14. A slurry composition for aluminising a superalloy component, comprising:
an organic binder, and
a solid content including aluminium,
wherein the composition further comprises hafnium and yttrium.
15. The composition as claimed in claim 14, wherein the composition comprises a hafnium content which is less than or equal to 2.5% by weight of the composition.
16. The composition as claimed in claim 15, wherein the composition comprises a hafnium content which is less than or equal to 1% by weight of the composition.
17. The composition as claimed in claim 14, wherein the composition comprises a yttrium content which is less than or equal to 0.1% by weight of the composition.
18. The composition as claimed in claim 17, wherein the composition comprises a yttrium content which is less than or equal to 0.05% by weight of the composition.
19. The composition as claimed in claim 14, wherein the solid content includes silicon between 1% and 40% by weight of the total solid content.
20. The composition as claimed in claim 14, further comprising a sulphur content which is not more than 5 ppm by weight of the composition.
21. The composition as claimed in claim 14, wherein the organic binder comprises chromate andor phosphate organic binders.
22. A superalloy component, comprising:
an aluminide coating, wherein the aluminide coating comprises at least a first layer, and wherein the coating material of the first layer comprises hafnium and yttrium in addition to aluminium
23. The superalloy component as claimed in claim 22, wherein the aluminide coating comprises at least two layers, the at least two layers comprising the first layer and a second layer, wherein coating material of the second layer comprises aluminium without hafnium and without yttrium.
24. The superalloy component as claimed in claim 23, wherein the aluminide coating comprises at least three layers, the at least three layers comprising the first layer, the second layer and a third layer, wherein coating material of the third layer comprises aluminium without hafnium and without yttrium, and wherein the first layer is sandwiched between the second layer and the third layer.
25. The superalloy component as claimed in claim 22, wherein content of hafnium in the first layer is less than or equal to 3% by weight of the layer components.
26. 11. The superalloy component as claimed in claim 22, wherein content of yttrium in the first layer is is less than or equal to 0.17% by weight of the layer components.
27. The superalloy component as claimed in claim 22, wherein the coating comprises at least one layer that further comprises silicon in addition to aluminium.
28. The superalloy component as claimed in claim 27, wherein content of silicon of the at least one layer is between 1% and 40% by weight of the layer components.

1. A low profile transmission cable for high frequency applications, the transmission cable comprising:
one or more inner conductors each having a substantially oblong curvilinear cross-section;
a dielectric material generally surrounding the one or more inner conductors;
a metallic outer shield generally surrounding the dielectric material; and
an outer jacket enveloping the metallic outer shield;
wherein the major axes of the substantially oblong curvilinear cross-section of the one or more inner conductors lie in a single plane.
2. The transmission cable of claim 1, wherein the dielectric material comprises a unitary sheath extruded over the one or more inner conductors.
3. The transmission cable of claim 1, wherein the dielectric material is wrapped around the one or more inner conductors.
4. The transmission cable of claim 1, wherein the at least one of the one or more inner conductors comprises a unitary filament.
5. The transmission cable of claim 1, wherein at least one of the one or more inner conductors comprises a plurality of electrically engaged conductive strands.
6. The transmission cable of claim 1, wherein an inner surface of the metallic outer shield is generally equidistant from the one or more inner conductors.
7. The transmission cable of claim 1, wherein the metallic outer shield comprises a plurality of braided wires.
8. The transmission cable of claim 1, wherein the metallic outer shield comprises a foil layer.
9. The transmission cable of claim 1, wherein the metallic outer shield comprises a plurality of braided wires and a foil layer.
10. The transmission cable of claim 1, and further comprising:
a drain wire in electrical contact with the metallic outer shield.
11. (canceled)
12. A low profile transmission cable suitable for transmission of signals in excess of 100 MHz, the transmission cable comprising:
a first conductor having a first substantially oblong cross-section;
a first dielectric sheath generally surrounding the first conductor;
a metallic outer shield generally surrounding the dielectric sheath; and
an outer jacket enveloping the metallic outer shield.
13. The transmission cable of claim 12, wherein the metallic outer shield generally surrounds the dielectric sheath such that an inner surface of the metallic outer shield is generally equidistant from the first conductor.
14. The transmission cable of claim 12, and further comprising:
a second conductor having a second substantially oblong cross-section; and
a second dielectric sheath generally surrounding the second conductor;
wherein the first conductor and the second conductor are positioned such that a major axis of the first substantially oblong cross-section is generally coplanar with a major axis of the second substantially oblong cross-section.
15. The transmission cable of claim 14, wherein the first dielectric sheath and the second dielectric sheath are integral.
16. The transmission cable of claim 15, wherein the first dielectric sheath and the second dielectric sheath are extruded over the first and second conductors.
17. The transmission cable of claim 15, wherein the first dielectric sheath and the second dielectric sheath are formed by wrapping a dielectric material around the first and second conductors.
18. (canceled)
19. The transmission cable of claim 14, wherein the metallic outer shield generally surrounds the first dielectric sheath and the second dielectric sheath.
20. The transmission cable of claim 14, and further comprising:
a drain wire in electrical contact with the metallic outer shield.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

What is claimed is:

1. A method of determining the packet error rate of a wireless LAN card, comprising:
(a) emulating an access point;
(b) transmitting a data packet;
(c) determining whether an acknowledgment packet has been received;
(d) if an acknowledgment packet is not received, determining that the data packet has been lost;
(e) if an acknowledgment packet is received, determining that the data packet has not been lost;
(f) repeating (b)-(e) a predetermined number of times; and
(g) computing a packet error rate based on the number of data packets determined to be lost relative to the number of data packets transmitted in (b).
2. The method of claim 1 wherein (b) includes transmitting noise having a predetermined level with said data packet.
3. The method of claim 2 further including repeating (b)-(g) with a different level of noise.
4. The method of claim 1 wherein (a) includes receiving a probe request and transmitting a probe response that includes a MAC address.
5. The method of claim 1 wherein further including associating with the wireless LAN card for which the packet error rate is computed in (g).
6. The method of claim 1 wherein (b) is performed inside an anechoic chamber.
7. The method of claim 1 further including repeating (b)-(g) for a different orientation of an antenna associated with said WLAN card.
8. A method of determining the packet error rate of a wireless LAN card, comprising:
(a) emulating an access point;
(b) transmitting a data packet to the wireless LAN card;
(c) transmitting an acknowledgment packet if said wireless LAN card correctly receives said data packet;
(d) determining whether an acknowledgment packet is received;
(e) if an acknowledgment packet is not received, determining that the data packet has been lost;
(f) if an acknowledgment packet is received, determining that the data packet has not been lost;
(g) repeating (b)-(f) a plurality of times; and
(h) computing a packet error rate based on the number of data packets determined to be lost relative to the number of data packets transmitted in (b).
9. The method of claim 8 wherein (b) includes transmitting noise having a predetermined level with said data packet.
10. The method of claim 9 further including repeating (b)-(h) with a different level of noise.
11. The method of claim 9 wherein (a) includes receiving a probe request and transmitting a probe response that includes a MAC address.
12. The method of claim 9 wherein further including associating with a wireless LAN card for which the packet error rate is computed in (h).
13. The method of claim 9 wherein (b) and (c) are performed inside an anechoic chamber.
14. A system that determines a packet error rate for a first wireless card, comprising:
a controller that includes a second wireless card and that wirelessly communicates with said first wireless card;
a test data packet generator having an antenna through test data packets are transmitted to said first wireless card;
a computer coupled to said controller, first wireless card and test data packet generator through which an operator can control the system;
wherein said controller emulates an access point, said test data packet generator sends test data packets to said first wireless card, and said controller determines whether acknowledgment packets are received from said first wireless card and computes a packet error rate.
15. The system of claim 14 wherein said test data packet generator comprises an arbitrary waveform generator coupled to an RF signal generator.
16. The system of claim 15 wherein said arbitrary signal generator introduces a controlled level of noise to said test data packet.
17. The system of claim 16 wherein said controller computes packet error rates for said first wireless card for different levels of noise.
18. The system of claim 14 wherein said controller determines a test data packet is lost when no acknowledgment packet is received within a prescribed period of time and computes said packet error rate by dividing the number of lost test data packets by the total number of test data packets transmitted.