A patient ventilator is connected with two stand-by switches wherein activation of both switches is required for stopping the ventilating function. The preferred stand-by switches are in the form of membrane switches in which a conductive dome is positioned and spaced between respective layers having electrical traces thereon cooperating with the dome for defining the switches. The application of manual pressure closes the spaces between the layers and activates both switches.

A package having a separable overlay is formed by a high speed web roll manufacturing method and adapted for multiple marketing of retail goods. The package has at least three layered sheets of flexible material, the outermost sheet being quickly and easily removable from the remainder of the package without disruption thereof. The package may thus be converted from one for marketing goods under a label of a seasonal or special nature to a package for marketing goods under a label of a general o...

An overlay system which enables the user to combine different design elements of a composite design, such as a window treatment, to form a representation of a desired composite design. The overlay system comprises a series of overlay sheets which are preferably clear mylar sheets, each imprinted with both a pictorial representation and a written description of the particular style option depicted thereon. Each particular style of the same category of design element is marked with a visual indici...

A spiral overlay having multiple variations, but generically, comprised of wire spirals intermeshed together by connecting rods extending across the conveyor in the transverse direction. Broadly, a first overlay is made up of spirals which may be tapered and afford pitch control by incorporating elongated loops in the spirals to limit the movement of the rods therein. The elongated loops also provide for collapsibility of the spirals relative to one another. A second overlay is made of integral ...

A method of making a multi-layer plain bearing comprises roll-bonding a relatively soft aluminum-tin alloy to a harder aluminum-based bearing substrate and then roll-bonding the composite to a steel backing. Following heat treatment conventional for reticulation of the aluminum-tin alloy the surface is machined to give a precise overall bearing thickness of which the aluminum-tin overlay is in the range of 0.01-0.10 mm, typical of an overlay but having greater fatigue strength and war resistance...

A sensor system for providing a cartographic overlay on a displayed sensor image for a current location within a selected region. The sensor system includes a sensor for generating the sensor image and a location device for generating a location signal corresponding to the current location of the sensor. Additionally, the system includes a storage device in electrical communication with the location device wherein the storage device electronically stores cartographic data for the selected region...

Focused ion bean (FIB) milling through a power plane of a device to expose or cut a hidden, lower-layer conductor requires accurate positioning relative to the hidden conductor of a box defining boundaries of the FIB operation. This can in general be done by aligning surface information (topology or voltage contrast) visible in a FIB or scanning electron microscope (SEM) image with an overlay image generated from stored data describing the device. The location of the hidden conductor relative to...

A picture overlay system assures proper size and placement of picture overlays in simultaneous picture displays. The system comprises a video memory and a control circuit for writing and reading information from a video signal into and out of the video memory, the information relating to video data and field type. A reading circuit supplies information from the video memory synchronously with a display for another video signal. An interpolator selectively compresses and expands the information r...

A medium pneumatic truck tire (10), has a belt package (18) comprising a plurality of belt plies (20, 22, 24, 26). The tread (16) of the tire is 200 to 380 mm wide (8 inches to 15 inches). In the shoulder area (31) of the tire, an overlay strip (32) is abutted against belt edge (34) of top belt (26) and is disposed over belt edge (33) of the adjacent belt (24). The overlay strip (32) is applied in two layers, and the reinforcing cords (38) therein have an angle of about 0.degree. with respect to...

An overlay mark for determining the relative shift between two or more successive layers of a substrate is disclosed. The overlay mark includes at least one test pattern for determining the relative shift between a first and a second layer of the substrate in a first direction. The test pattern includes a first set of working zones and a second set of working zones. The first set of working zones are disposed on a first layer of the substrate and have at least two working zones diagonally oppose...