Abstract: The top and bottom felts at the web transfer between two dryer sections in a single tier papermaking dryer are spaced by pivoting the vacuum roll over which the felt and web move. The vacuum roll is mounted to two pivot arms which are driven by inflatable air rides to alternately incline the roll toward the downstream felt, forming a sandwich of the two felts and the web, and to a spaced position. The short motion of the vacuum roll allows standard felt stretchers to be used, and permits rapid adjustment of the felt spacing.
Abstract: The Medic-Cam is a wireless, highly integrated, portable, lightweight sys which provides high quality video and audio communications between highly trained specialists and remotely located field personnel. The system utilizes a head mounted display, a subminiature high resolution color CCD camera, microphone, transmitter, receiver, antenna, battery and vest. The size and integration of the head mounted components allow it to be worn under a combat kevlar helmet.
Type:
Grant
Filed:
November 21, 1996
Date of Patent:
March 2, 1999
Assignee:
The United States of America as represented by the Secretary of the Army
Abstract: An attenuator/filter is disclosed that is inherently tuned and provides for a stimulated Brillouin scattering effect having a predetermined threshold that fixes the output thereof at a predefined power level. The stimulated Brillouin scattering effect is disclosed as being provided by either a fused silica optical fiber or a fiber-optic ring resonator both of which act as a filter to allow selected frequencies to pass. The SBS threshold is selected to improve the sideband to carrier power ratio which, in turn, determines the modulation depth for the modulated signal.