Vacuum break switch shock absorber
An underarm gang operated vacuum break switch (underarm switch) has an electrically live portion under a mounting arm, which provides advantages over the standard vacuum break switch, which have the electrically live portion above the mounting arm. Because the non-electrified mounting arm is above the electrified portion, the underarm switch is safer for perching birds and other wildlife. The nature of the underarm switch also provides other benefits including a disconnect blade that when opened creates a visual gap to ensure electrical discontinuity along with a safety locking arm tied to deactivating the underarm switch. Adding to the safety measures is a visual indicator that shows an electrician when the switch is live and safe to open the disconnect blade. Other safety measures include a shock absorber assembly and inertia slowing mass protecting electrical contacts within the vacuum break switch from failing.
1. A vacuum switch actuator comprising:
a linkage configured to drive a dynamic contact shaft and a spring housing closer to a vacuum bottle when in a first position than when in a second position;
the dynamic contact shaft fixedly connected to a dynamic electrical contact that is electrically connected to a fixed electrical contact when in the first position;
a spring that is housed in the spring housing and interposed between the linkage and the dynamic contact shaft, the spring having a resistance that is highest when the spring housing is in the first position versus the second position,
when in the first position the dynamic electrical contact and the fixed electrical contact are electrically connected inside of the vacuum bottle.
2. The vacuum switch actuator of claim 1 , wherein the spring is a coil spring.
3. The vacuum switch actuator of claim 2 , wherein the coil spring, the spring housing, the fixed electrical contact, the dynamic electrical contact, and a spring housing port, that accommodates the dynamic contact shaft, are symmetric about an axis.
4. The vacuum switch actuator of claim 1 , wherein the dynamic contact shaft comprises a spring compression hub and a stop flange, the spring compression hub is configured to slide in and out of a spring housing port, the stop flange is captured within the housing.
5. The vacuum switch actuator of claim 4 , wherein the dynamic contact shaft and the spring compression hub are a single piece of material.
6. The vacuum switch actuator of claim 1 , wherein the linkage connects to the spring housing via a pivot point in a housing-linkage extension arm.
7. The vacuum switch actuator of claim 1 , wherein the spring housing slidingly engages an anchor strap, which limits movement of the spring housing along the axis.
8. The vacuum switch actuator of claim 1 , wherein the spring is configured to slow down movement of the dynamic electrical contact when the dynamic electrical contact moves from the second position to the first position.
9. A vacuum switch actuator comprising:
a spring housing in a first position when a dynamic electrical contact is electrically connected to a fixed electrical contact and in a second position when the dynamic contact is electrically disconnected from the fixed electrical contact;
a spring disposed in the spring housing, the spring connected to the dynamic electrical contact at one end and a linkage at another end, wherein the spring has a higher resistance when the spring housing is in the first position than when the spring housing is in the second position;
the electrical contacts disposed in a vacuum bottle housing.
10. The vacuum switch actuator of claim 9 , wherein the dynamic electrical contact comprises a dynamic contact shaft comprises a spring compression hub and a stop flange, the spring compression hub is configured to slide in and out of a housing port in the spring housing, and the stop flange is captured within the spring housing.
11. The vacuum switch actuator of claim 9 , wherein the spring is configured to slow down movement of the dynamic electrical contact when the dynamic electrical contact moves from the second position to the first position.
12. The vacuum switch actuator of claim 9 , wherein the linkage connects to the spring housing via a housing-linkage extension arm.
13. The vacuum switch actuator of claim 12 , wherein the linkage connects to the housing-linkage extension arm at a housing-linkage pivot point.
14. The vacuum switch actuator of claim 9 , wherein the spring housing is configured to move along an axis that is shared with the dynamic and the fixed electrical contacts.
15. The vacuum switch actuator of claim 10 , wherein the linkage is configured to drive the dynamic contact shaft and the spring housing from the second position to the first position.
16. A vacuum switch actuator comprising:
a linkage configured to drive a dynamic contact shaft and a spring housing in a first position towards a vacuum bottle assembly and a second position away from the vacuum bottle assembly;
the dynamic contact shaft is fixedly connected to a dynamic electrical contact when in the first position;
a spring is housed in the spring housing, the spring is interposed between the linkage and the dynamic contact shaft, wherein the spring has a higher resistance when the spring housing is in the first position than when the spring housing is in the second position,
when in the first position the dynamic electrical contact and the fixed electrical contact are electrically connected inside of a vacuum bottle.
17. The vacuum switch actuator of claim 16 , wherein the spring comprising a resistance that is highest when the spring housing is in the first position versus the second position.
18. The vacuum switch actuator of claim 16 , wherein the spring is configured to slow down movement of the dynamic electrical contact when the dynamic electrical contact moves from the second position to the first position.