Abstract: Rotation is detected by splitting a beam of phase coherent light into two beams and directing them separately and oppositely around paths at least one of which is separated from and surrounds the axis of rotation. A light transmitting medium having a substantial index of refraction is interposed in said at least one path. The beams are then combined to form a fringe pattern and rotation is indicated by a shift in the fringe pattern due to the Fizeau effect. The length of said medium is made as long as it can be made while still retaining sufficient coherence in the light and intensity to detect the fringe pattern efficiently.

Abstract: Apparatus and processes for use therewith are provided for the start-up of the continuous casting of strip metal, preferably steel, in which liquid metal is poured into a flared type continuous casting strip-shaped mold equipped with detector means for monitoring the instantaneous surface level of the liquid metal bath formed in the flared zone of the mold, and sensor means for sensing the presence of liquid in the core of the cast strip downstream of the mold, and means are further provided responsive to said detectors and sensor for controlling both the rate of pouring the liquid metal, and the start-up and rate of withdrawal of the cast strip to ensure the continuous presence of a liquid metal core in said cast strip downstream of said mold, for signalling when the distribution ports of the pouring tube become submerged, and for thereafter during casting maintaining a predetermined optimum operating surface level of said metal bath.

Abstract: A dispensing device and disposable mixer for a plurality of fluids is provided in a combination in which the dispenser stores the fluids separately and delivers them to an orifice in which the fluids are maintained in separation to the point of interface between the orifice and the disposable mixer with means in the inlet end of the mixer having low resistance to the flow of the fluids for preventing cross contamination between the fluids and optionally provided with means at the inlet end of the mixer for both enhancing the mixing action downstream and for maintaining the integrity and separation between the fluids.

Abstract: A process and apparatus for bias rolling of strip metal is provided wherein the strip stock is formed cylindrically and passed through a rolling station wherein roll passes formed by small diameter rolls traverse the stock on the bias along helical paths which successively overlap so that a uniform and flat rolled surface is formed.

Abstract: A method for concluding the operation of the continuous casting of strip metal comprising the steps of casting said strip in a narrow slotted strip shaped continuous casting mold having a flared inlet pouring zone necking down to a distal zone in which the walls of the mold are parallel and spaced apart by substantially the desired cross-sectional shape and dimensions of the strip being cast, pouring liquid metal through a pouring tube having an orifice into said flared zone, and controlling the pouring rate thereof, continuously detecting and monitoring the instantaneous surface level of the metal bath in said mold, withdrawing the casting from the distal end of said mold, and controlling the rate of withdrawal, adjusting the pouring rate and withdrawal rate so that the level of the metal bath is at a maximum height for said mold when in normal operation, continuously sensing whether or not there is present downstream of said mold evidence of the liquid core of said cast strip, reducing the pouring and withd

Abstract: A mold is provided for continuously casting strip metal in which the mold cavity is formed with a flared mouth the internal surfaces of which terminate at their lower end along a transversely extending line, and the reflex angles which the mold along that line at a maximum near the center line of the mold and gradually diminishing toward the side edges of the mold.

Abstract: Continuous casting apparatus is provided having a highly conductive, cooled flow-through mold, a feeder for the mold having an upstream and a downstream section with the downstream section in abutment with the mold, a heater associated with the upstream section for maintaining metal in contact therewith above liquidus temperature, the feeder sections being made of refractory material and dimensioned such that the heat from the upstream section is not bled off so rapidly into the cooling elements of the adjacent mold as to start the strand shell development in the upstream section, but sufficiently to let it start in the downstream secton of the feeder.

Abstract: Means are provided for connecting the proximal end of a dummy strip to the distal (i.e. leading) end of a strip casting, in which a throw-away element serving both as a connector and a heat sink for chilling the metal adjacent to the connector is removably mounted on the proximal end of the dummy strip, with a slightly resilient sealing element holding both the dummy strip and the connector-heat sink element centrally of the mold cavity, and with the connector-heat sink spaced from the walls of the mold by a narrow gap and also having means for both chilling and positively interlocking with the metal of the distal end of the cast strip when it congeals.

Abstract: The present invention relates to a device for and method of cutting vinyl window shades mounted on a roller. The device includes jaws for clamping the roller to stabilize it during the cutting operation, a blade fixed to a wheel that revolves around the roller and that is drawn toward the roller by centrifugal force as the wheel revolves, a device for stopping the wheel if the cutting blade contacts a metal shade roller, and another device for stopping the wheel if the blades travels a predetermined distance.

Abstract: A metallic strip is hot-rolled in a succession of roll stands arranged in a row by passing the strip longitudinally in a travel direction through the stands. The strip is then compressed in the upstream stands to substantially reduce its thickness measured perpendicular to the travel direction and parallel to the strip while substantially increasing its width measured perpendicular to the travel direction and transverse to the strip. Then in the downstream stands it is compressed and tensioned without substantially increasing its width to level it and stretch it longitudinally in the travel direction. With standard steel strip this critical thickness is about 12 mm. The local band thickness is measured downstream of the upstream roll stands and the furthest downstream stand of the upstream stands is operated to eliminate any nonuniformities in thickness thus detected. The nonuniformities are detected by comparing the local band thicknesses detected with standard set-point thicknesses.

Abstract: A bifocal contact lens is described wherein at least the major viewing area is divided into a multiplicity of near and distant vision viewing zones, each near vision zone being adjacent to a distant vision zone or middle distance zone and there being at least 3 viewing zones in all, whereby the wearer is able to look through at least 2 zones of different power simultaneously. Normally the lens has at least 2 of each kind of viewing zone and the total surface area of the distant vision zones is substantially equal to the total surface area of the near vision zones.

Abstract: An electric lawn mower and power cord combination in which the power cord has a central portion that is self-coiling. This central portion of the cord comprises the predominant length of the cord, and is constructed with an elastic memory, so that, when in its relaxed state, it automatically coils itself into a continuous spiralling helix that is too large to pass under the electric lawn mower. A cord grip is also disclosed that locks the cord to a stationary object to prevent the cord from inadvertently becoming disconnected during use.

Abstract: An outer metallic ball-bearing ring has a ball-locating raceway on its inner bore. At least one sharply defined part pyramidal notch in a land of the bore of the ring projects inwardly from one side face of the ring terminating adjacent the raceway. A full complement of balls can be assembled in the raceway by splitting the ring as is known and the notch ensures the ring fractures along a defined axial plane when exposed to controlled force.

Abstract: A semi-adjustable shade and roller combination is provided in which an essentially non-stretchable shade material is mounted on a telescoping roller made up of an outer roller and an inner roller with the shade secured to the outer roller, and the inner roller having a split plastic sleeve over it to make up for the difference in outside diameter between the inner and outer rollers, the inner roller having an enlarged flanged head.

Abstract: A bracket for supporting the headrail of a venetian or pleated blind is provided with housings each having a partially open bottom and a detachable pivoting front plate to facilitate access to the interior of the bracket while mounting it on a wall, and to support the end of the headrail when the front plate is pivoted to the closed position. The housings are righthand or lefthand, but the front plate is interchangeable. The partially open bottom of the housing permits a pleated blind to be attached to one face of the headrail by means of a retaining member extending the full length of the headrail and to support the blind along a line forward of the rear of the headrail.

Abstract: A device for draining aqueous humor from an eye comprises a drainage tube and a drainage body. The drainage tube drains aqueous humor from the anterior chamber of the eye, and the drainage body distributes drained aqueous humor over a relatively large area. The drainage tube is firmly fixed to the drainage body, and opens directly on to a surface of the drainage body. The drainage body is constituted by a silicone rubber band having a width of at least 5 mm and a length which is sufficient for the band to pass around, and to be sutured to, the sclera of the eye in an equatorial position. The device is provided with a pressure gradient limiting valve having a predetermined opening pressure.

Abstract: A fail-safe, self-checking flame monitoring circuit is provided without the use of a mechanical shutter in which a photodetector provides a signal corresponding to flame intensity (including flicker), an amplifier amplifies the signal, the amplification is controlled by a negative feedback circuit in relation to the peak amplitude of the signal (including flicker) such that all frequencies down to DC are amplified equally, and all amplified signals are passed, without threshold, downstream for further processing.

Abstract: Apparatus for monitoring flames is provided with means for sampling both the value of a flame and the period of time during which a flame remains above a given intensity level during start-up. Flame-off delay means is also provided in combination with means for delaying a flame-on indication, means for segregating the respective operations thereof, and means for maintaining the durations of the flame-on and flame-off delays in fixed proportional relationship.