Dovetail sliding mount with movable clamp bar
A sliding mount comprising: a base having a female dovetail groove therein, wherein the female dovetail groove has an open end and a closed end; a mounting cassette having a male dovetail feature configured to slidably interface with the base by insertion through the open end; a clamp bar having proximal and distal ends, wherein the proximal end is movably connected to the base such that when the clamp bar is in an open configuration, the clamp bar is sufficiently moved away from the open end to allow the mounting cassette to move in and out of the female dovetail groove; and a clasp having a first half disposed on the base and a second half disposed on the distal end of the clamp bar such that when the clamp bar is in a closed configuration, the clamp bar spans the open end and the first half is clasped to the second half so as to bias the mounting cassette against the closed end.
1. A sliding mount comprising:
a base having a female dovetail groove therein, wherein the female dovetail groove has an open end and a closed end;
a mounting cassette having a male dovetail feature configured to slidably interface with the base by insertion through the open end;
a clamp bar having proximal and distal ends, wherein the proximal end is movably connected to the base such that when the clamp bar is in an open configuration, the clamp bar is sufficiently moved away from the open end to allow the mounting cassette to move in and out of the female dovetail groove; and
a clasp having a first half disposed on the base and a second half disposed on the distal end of the clamp bar such that when the clamp bar is in a closed configuration, the clamp bar spans the open end and the first half is clasped to the second half so as to bias the mounting cassette against the closed end.
2. The sliding mount of claim 1 , further comprising a pin connected to the base near the open end and disposed in a hole in the proximal end of the clamp bar such that the clamp bar moves around the pin.
3. The sliding mount of claim 2 , wherein the hole in the proximal end of the clamp bar is a slot that allows both pivoting and transverse sliding of the clamp bar with respect to the pin.
4. The sliding mount of claim 3 , wherein the second half of the clasp is a hook and the first half of the clasp is a hook receiver, and wherein the slot is configured such that when the clamp bar pivots around the pin when the pin is positioned in a first end of the slot, the hook is aligned to engage the hook receiver and when the clamp bar pivots around the pin when the pin is positioned in a second end of the slot, the hook does not engage the hook receiver.
5. The sliding mount of claim 4 , wherein the distal end of the clamp bar itself is hook-shaped and serves as the second half of the clasp, wherein the hook receiver is a first bolt fastened to the base so as to receive the hook when the clamp bar is in the closed position; and wherein the first bolt may be tightened when the clamp bar is in the closed configuration such that the distal end is clamped between the base and a head of the first bolt.
6. The sliding mount of claim 5 , wherein the base and the clamp bar are made of the same material.
7. The sliding mount of claim 6 , further comprising nylon sleeves disposed around the pin and threads of the first bolt such that the clamp bar does not come into physical contact with the pin or the first bolt.
8. The sliding mount of claim 1 , wherein the clamp bar has a mass that, when in the closed configuration, is approximately balanced over a longitudinal center line of the mounting cassette.
9. The sliding mount of claim 4 , wherein the clamp bar has a triangular-shaped notch in a top surface that allows the clamp bar to move into the open configuration by pivoting no more than 25 degrees in either direction from the closed position.
10. The sliding mount of claim 7 , wherein the open end of the female dovetail groove and a back end of the mounting cassette comprise beveled edges configured to facilitate insertion of the mounting cassette into the female dovetail groove.
11. The sliding mount of claim 10 , further comprising a safety bolt fastened to a side of the base such that when tightened, the safety bolt is configured to enter the female dovetail groove and to interface with a hole positioned in the mounting cassette so as to align with the safety bolt when the mounting cassette is biased against the closed end.
12. The sliding mount of claim 5 , wherein the first bolt is a cam-lock bolt.
13. The sliding mount of claim 10 , wherein the pin is part of a pin bolt, and wherein the pin bolt and the first bolt are threaded into the base in the closed configuration to a distance that is at least five times the diameter of the pin bolt and the first bolt respectively.
14. The sliding mount of claim 1 , wherein no transverse clamping is applied to the mounting cassette.
15. The sliding mount of claim 1 , wherein the base is made of metal and the mounting cassette is made of plastic.
16. The sliding mount of claim 15 , wherein the mounting cassette is made of a material that has a coefficient of friction that is less-than or equal to 0.20.
17. The sliding mount of claim 1 , wherein the clamp bar is configured such that placing the clamp bar in the closed configuration results in minor, longitudinal plastic deformation of the mounting cassette.
18. The sliding mount of claim 2 , wherein the pin serves as a hinge pin that enables the clamp bar to move parallel to the longitudinal plane of the female dovetail groove.
19. The sliding mount of claim 18 , wherein the clasp is a hand-operated toggle latch.
20. The sliding mount of claim 13 , wherein threads of the pin bolt and the first bolt are coated in marine lubricant.