摘要:
The invention relates to a level indicating device including a container or reservoir and a length of tubing extending from the container near the bottom thereof. Narrow, inverted cups are adhered to the sides of the container so that they may be slipped over the top of a stake driven into the ground to provide a firm, stable support for the container while the tubing is moved to different locations to establish a reference horizontal plane.
摘要:
A tonometer which is used to measure the tension of eyeballs has a first testing device with a first outwardly bulging deformable wall which can be pressed against the eyeball (either directly or by way of the eyelid) and a second flexible wall which is deformable by the flexible or rigid wall member of a second testing device. The housing of the first testing device is filled with a gaseous or liquid fluid whose pressure is monitored by one or more gauges or risers, and a further instrument is provided on or in the second testing device to indicate the position of the wall member. The scale of the further instrument is calibrated in units of pressure in such a way that the tension of the eyeball can be read directly off the scale when the gauges or risers indicate that the deforming work upon one of the flexible walls is the same as that upon the other flexible wall.
摘要:
An instrument for establishing a horizontal plane for leveling ceilings, tables, floors and the like, consisting of a reference head having a translucent liquid reservoir, an adjustable field head, and a hose for interconnecting the two heads. With the level of liquid in the reservoir calibrated to correspond to the desired elevation, the liquid level at the field head at the other end of the hose will correspond to the selected reference level, thereby providing a means for defining a horizontal plane which is independent of a continuous line of sight. A plurality of datum scales in visual juxtaposition with the reference head reservoir and correlated to the mounting channel or to the base of the reference head provide reference marks at known vertical distances from these mounting points.
摘要:
A high-sensitivity device for measuring the mutual level differentials among a certain number of reading locations, the device comprising a plurality of containers, one for each reading location, mutually connected at the bottom ends by a piping opening into a balancing tank which holds a liquid mass. Each container is equipped in its interior with a float which is held spaced apart from the container walls by flexible retaining members, a level-differential sensitive transducer being mounted in correspondence with the walls. The apparatus further comprises a device for measuring the signals delivered by the transducers.
摘要:
A level device is designed to determine different levelling points in building work to automatically set certain parts, such as the suspension systems for false ceilings when this apparatus is fitted with a bolt-driving attachment, comprising a flexible tube connected to a first chamber closed by a first diaphragm offering very low resistance to the liquid contained, the other end of the tube connected to a second chamber closed by a second diaphragm which second diaphragm offers resistance to the liquid contained and compresses the air contained in the corresponding space whereby in turn this air actuates a diaphragm which has needle-type contact switches, on each side, these circuits to an indicator, with a valve used to locate the apparatus at a point which may be at a higher or lower level than that determined by the first diaphragm.
摘要:
An elevation indicator comprising a supporting base, a reservoir for holding liquid supported on the base, an elongated staff and a flexible tube extending from the staff to the reservoir. An elongated scale is mounted on the staff for longitudinal movement relative to the staff and a transparent tube is also mounted on the staff and extends along one side of the staff adjacent the scale. A check valve is located at the top of the transparent tube and the bottom of the transparent tube is connected to the flexible tube, so that liquid can flow between the reservoir and the transparent tube.
摘要:
A liquid apparatus for determining level points including a reservoir assembly, a sight tube assembly, and a connecting liquid conduit is improved in order to prevent (1) the spillage or overflow of the liquid and (2) the passage of air bubbles into the conduit. Atmospheric vent valve assemblies are positioned above the liquid in the reservoir assembly and the sight tube assembly. Liquid valve assemblies are positioned adjacent the connections to the conduit on the reservoir assembly and the sight tube assembly. All four of these valve assemblies are controlled by a single remote control operator positioned on the sight tube assembly. Simplified alternative embodiments omit one or both of the valve assemblies on the reservoir assembly.
摘要:
A fluid leveling system for maintaining the level or grade of a trench being dug by a trenching machine, in which a pair of glass tubes are connected with a flexible hose and filled to a predetermined level with water or other liquid. One tube is attached to a fixed point while the other tube is attaching to the trenching machine and can be adjusted relative to the fixed point so that variations in the liquid level in either glass tube can be used to maintain the grade of the trench.
摘要:
A method of measuring the relative underwater depth between two or more underwater locations utilizing a gas filled hose connected at each end to a transparent vertically extending measuring tube with the lower end of both tubes open to provide a gas-water interface. Thus when the tube at one end of the hose is moved up or down, depending on the depth of the underwater terrain, the gas-water interface shifts relative to that measuring tube to maintain a level with the gas water interface(s) and the other tube(s).
摘要:
Apparatus for installing raised floors by means of adjusting leveling jacks, which apparatus includes a leveling head with a sight glass connected to a liquid reservoir, rotatable support shaft for the head having a base adapted for driving engagement with a floor support jack and a rolling contact marker for scribing a level line for installing a drop ceiling.