1. A superlattice crystal resonator, comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate, wherein said first electrode and second electrode are both single pole electrode, serving as an electrical input and an electrical output, respectively.
2. A superlattice crystal resonator, comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate, wherein said first electrode is bipolar with one pole serving as an electrical input and another pole as an electrical output, and said second electrode is connected to ground.
3. A superlattice crystal filter, comprising at least one superlattice crystal resonator comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate.
4. The superlattice crystal filter of claim 3, wherein in said resonator said first electrode is bipolar with one pole serving as an electrical input and another pole as an electrical output, and said second electrode is connected to ground.
5. The superlattice crystal filter of claim 3, comprising a plurality of superlattice crystal resonator comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate, which are connected with each other in series and form a serial branch, and a plurality of parallel branches each having a first end and a second end, wherein said first end of each said parallel branch is in connection with an end of one of said superlattice crystal resonators in said serial branch, and said second end of each said parallel branch is connected to common ground.
6. The superlattice crystal filter of claim 5, wherein each of said parallel branches is a LC resonance circuit.
7. The superlattice crystal filter of claim 6, wherein said LC resonance circuit comprises a capacitor branch connected in parallel with a serial branch comprising an inductor and a capacitor.
8. The superlattice crystal filter of claim 5, wherein each of said parallel branches is a superlattice crystal resonator comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate.
9. The superlattice crystal filter of claim 3, comprising a plurality of superlattice crystal resonators comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate, wherein said superlattice crystal resonators form a first serial branch and a second serial branch, each of said first serial branch and said second serial branch comprises at least two of said superlattice crystal resonators interconnected in series, and a plurality of parallel beaches each of which comprises one of said superlattice crystal resonators.
10. The superlattice crystal filter of claim 9, wherein each of said parallel branches has a first end and a second end, said first end is in connection with an end of one of said superlattice crystal resonators in said first serial branch, and said second end is in connection with an end of one of said superlattice crystal resonators in said second serial branch.
11. The superlattice crystal filter of claim 9, wherein there are three parallel branches each of which is a superlattice crystal resonator comprising a substrate of a dielectric acoustic superlattice material, a first electrode plated on a first side of said substrate, and a second electrode plated on a second side of said substrate.
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. A device for arresting movement of a rail accommodated within a channel, the device comprising:
a slide surface located on one of the rail or channel, the slide surface inclined in relation to an opposing side wall of the other of the rail or channel;
a slide member arranged to slide along the slide surface between an extended position and a retracted position; and
a resilient member which biases the slide member along the slide surface towards the extended position and into abutment with the side wall,
wherein movement of the channel in relation to the rail in a first direction moves the slide member along the slide surface towards the retracted position,
wherein movement of the channel in relation to the rail in a second direction, opposite to the first direction, moves the slide member along the slide surface towards the extended position, and
wherein the resilient member is at least partially received within a sleeve.
2. The device of claim 1, wherein the sleeve is a hollow cylindrical member and the resilient member is a helical spring.
3. The device of claim 1, wherein the sleeve is guided along a linear path by a guidance mechanism.
4. The device of claim 3, wherein the guidance mechanism comprises a ridge on the sleeve which is slideable within a groove located on one of the rail or the channel.
5. The device of claim 3, wherein the guidance mechanism comprises a ridge on one of the rail or channel which is slideable within a groove on the sleeve.
6. The device of claim 1, wherein the slide member is a cylindrical roller having a central axis arranged parallel to the slide surface.
7. The device of claim 1, further comprising a manually operable button coupled to the slide member to enable user-operated movement of the slide member towards the retracted position.
8. The device of claim 7, further comprising a lock mechanism for holding the slide member in the retracted position.
9. The device of claim 8, wherein the lock mechanism comprises a hook on the button for engagement with a dowel on one of the rail or channel.
10. The device of claim 7, wherein the button is coupled to the slide member by a pin passing through a linear slot in one of the rail or channel and wherein the slot is parallel to the slide surface.
11. The device of claim 1, wherein the slide member urges the rail into abutment with a wall of the channel when in the extended position thereby arresting movement of the rail accommodated within the channel.
12. A power tool guidable by a rail, the tool comprising;
a housing;
a base plate coupled to the housing; and
a channel in one side of the base plate,
wherein the channel is arranged to accommodate a rail and the base plate includes a device for arresting movement of the rail accommodated within the channel, the device comprising:
a slide surface located on one of the rail or channel, the slide surface inclined in relation to an opposing side wall of the other of the rail or channel;
a slide member arranged to slide along the slide surface between an extended position and a retracted position; and
a resilient member which biases the slide member along the slide surface towards the extended position and into abutment with the side wall,
wherein movement of the channel in relation to the rail in a first direction moves the slide member along the slide surface towards the retracted position,
wherein movement of the channel in relation to the rail in a second direction, opposite to the first direction, moves the slide member along the slide surface towards the extended position, and
wherein the resilient member is at least partially received within a sleeve.