Abstract: A hybrid radiolucent screw having radiopaque components and radiolucent components, which collaboratively define a tip of the screw and a head of the screw. In this manner, distortion is minimized during fluoroscopy or radiography of the screw while visualization of the screw and surrounding area is enhanced.

Abstract: A hybrid radiolucent screw having radiopaque components and radiolucent components, which collaboratively define a tip of the screw and a head of the screw. In this manner, distortion is minimized during fluoroscopy or radiography of the screw while visualization of the screw and surrounding area is enhanced.

Abstract: A smoke and heat detector alarm including a compressed gas, self contained, stored energy source. A T-fitting connects to the compressed gas tank through a fusible element activated valve and feeds separate conduit systems leading to individual sounding devices. One of the conduit systems receives compressed gas directly from the valve to automatically permit transfer of the compressed gas to a first sounding device upon the presence of elevated temperatures sufficient to fuse the fusible element. The valve includes a lever arm that is functioned by operation of the fusible element to trigger an additional electrical alarm circuit. A solenoid operated switch is interposed in the other conduit system to normally prevent the flow of gas. The solenoid is responsive to a smoke detector and is wired to open the solenoid valve upon sensing the presence of a predetermined concentration of smoke to permit transfer of the compressed gas to a second sounding device.

Abstract: A sensitive fuse for fire alarms comprising an extremely thin heat collector disk of nickel or brass nickel plated material. A pair of phenolic resin copper laminated attachment strips are soldered to the disk to form a unitary fuse. One attachment strip is permanently soldered to the disk and the other strip is attached to the disk with a eutectic solder which is formulated to melt at a low, predetermined temperature. The phenolic resin end of each strip has a punched hole for attaching the fuse assembly to alarm valve lever arms. The thinness of the heat collector disk results in rapid transfer of heat to melt the eutectic solder. The phenolic portions of the attachment strips serve to insulate the heat sensitive portions of the fuse assembly from the remainder of the alarm device to increase sensitivity.

Abstract: A combination smoke and heat detector alarm including a self contained stored energy source in the form of a cylinder of compressed gas. A T-fitting connects to the cylinder and feeds separate conduit systems leading to individual sounding devices. A fusible element is interposed in one of the conduit systems to automatically permit transfer of the compressed gas to a first sounding device upon the presence of elevated temperatures. A solenoid operated switch is interposed in the other conduit system to normally prevent the flow of gas. The solenoid is responsive to a smoke detector and is wired to open the solenoid valve upon sensing the presence of a predetermined concentration of smoke.