Abstract: A multi-joint fixture including a proximal base unit, one or more arms serially connected by electromagnetically lockable ball joints, and a distal hub. The ball joints unlock when not powered. A centering mechanism biases the ball joints toward a neutral position. A control system activates the electromagnetic brake with a high-then-low voltage profile. A headpiece attaches to the hub and holds a drape that covers the fixture. A connector connects a surgical device to the headpiece. A switch on the hub can be actuated via actuators on the headpiece or connector.

Abstract: A setback switch device is provided which, upon launch, can arm an explosive or pyrotechnic device for military gun launched applications. An included bridgewire shunt feature can also prevent the unintended arming, or accidental arming by a stray voltage before any launch is undertaken, of such explosive or pyrotechnic device.

Abstract: A multi-joint fixture including a proximal base unit, one or more arms serially connected by electromagnetically lockable ball joints, and a distal hub. The ball joints unlock when not powered. A centering mechanism biases the ball joints toward a neutral position. A control system activates the electromagnetic brake with a high-then-low voltage profile. A headpiece attaches to the hub and holds a drape that covers the fixture. A connector connects a surgical device to the headpiece. A switch on the hub can be actuated via actuators on the headpiece or connector.

Abstract: A projectile may include a body having an external surface, a stagnation port on the external surface, and a cavity. A spoiler may be translatable in the cavity between a retracted position, wherein the spoiler is substantially completely disposed in the cavity, and an extended position, wherein the spoiler projects from the external surface of the body. A pair of ports may be formed in the walls of the cavity. The pair of ports may be selectively fluidly communicable with the stagnation port. The spoiler may be translatable by pressurizing one of the pair of ports with compressed air and venting the other of the pair of ports. In the extended position, the spoiler may disturb an airstream around the projectile to induce a guidance maneuver for the projectile.

Abstract: A clamp for attaching a medical device to an OR table rail, including two closable clamp jaws that close to an extreme position that leaves inadequate room for the rail. A handle actuates the jaws apart, and a spring biases them together through a range of jaw positions. A lock member is biased to swing through a range of lock positions in which it progressively engages and locks the jaw mechanism through its range of jaw positions. A pair of bars carries the medical device on the clamp, and allows it to be adjustably positioned with respect to the rail.

Abstract: A clamp for attaching a medical device to an OR table rail, including two closable clamp jaws that close to an extreme position that leaves inadequate room for the rail. A handle actuates the jaws apart, and a spring biases them together through a range of jaw positions. A lock member is biased to swing through a range of lock positions in which it progressively engages and locks the jaw mechanism through its range of jaw positions. A pair of bars carries the medical device on the clamp, and allows it to be adjustably positioned with respect to the rail.

Abstract: A clamp for attaching a medical device to an OR table rail, including two closable clamp jaws that close to an extreme position that leaves inadequate room for the rail. A handle actuates the jaws apart, and a spring biases them together through a range of jaw positions. A lock member is biased to swing through a range of lock positions in which it progressively engages and locks the jaw mechanism through its range of jaw positions. A pair of bars carries the medical device on the clamp, and allows it to be adjustably positioned with respect to the rail.

Abstract: Apparatus and method are described for interoperatively determining, during a trailing procedure conducted in connection with total hip arthroplasty, a combination of neck length and femoral head offset required in a femoral component for establishing appropriate hip mechanics in a prosthetic hip joint to be implanted at an implant site. A trial femoral head is coupled for selective movement relative to a femoral stem component to move the trial femoral head longitudinally and laterally relative to a predetermined direction among selected combinations of trial distance and trial offset to evaluate hip mechanics and determine interoperatively an appropriate combination of trial distance and trial offset corresponding to the combination of neck length and femoral head offset required in the prosthetic hip joint.