An indicating device in the form of a thin metallic foil such as manganin on which a temperature indicating material such as Tempilaq is sprayed the foil being tapered to provide a temperature gradient whereby the passage of current through the tapered wedge causes a melt line to occur indicating the amount of current flow.

Self-powered apparatus for indicating the existence of a fault in any of a plurality of conductors in an multiconductor electrical distribution system. The plurality of conductors pass through the window of a closed loop core structure current transformer, and the current transformer has a power output and a signal output. The power output is connected to, and drives, fault indicating means and starting means. The starting means initiate operation of control signal translation means which are co...

Typical apparatus as shown in FIGS. 1 and 12 for indicating the relative positions in a given direction between a reference point (24,59) and a test point (29,68) spaced therefrom and movable relative thereto is useful for measurement of the magnitude and direction of static or dynamic torque in a shaft (8). Overlapping transparent reference (20,60) and test surfaces (25,61), either parallel disks (60,61) or coaxial cylinders (20,25) each having a relevant portion covered with a plurality of equ...

A target system for use with spring, air, and CO.sub.2 operated pistols and rifles and with slingshots. The target system prevents ricochets by use of a flexible backstop suspended within a housing while permitting the shooter and spectators to easily discern where the projectiles have penetrated a target which is disposed across the front of this housing. The system utilizes supports incorporated into the housing to receive tubes upon which the target is wound for easy movement and removal of u...

A charge indicating arrangement in the form of a taximeter is provided which is arranged to store a current tariff structure and a proposed tariff structure and which is provided with means for switching from one to the other at a required time e.g. a specified time and date on which the proposed tariff structure is required to take effect.

An indicating instrument, particularly for indicating small displacements of a feeler for use in locating the precise position of notches in a program strip to set up a machine tool. The instrument has a lever arm fixed with respect to the feeler and an abutment member moved by the lever arm to give mechanical movement magnification, the degree of magnification being different for different ranges of movement so that the instrument is most sensitive at a predetermined zone of feeler movement, th...

An indicating device has a first surface area having variable optical properties and a second surface area having fixed optical properties. The optical properties of the first and second surface areas are coordinated to provide improved readability and perceptibility of the indications on the indicating device.

The indicator of this invention measures the amount of a web material wound upon a spool by utilizing the principle that the rate at which the spool rotates, as the web is wound or unwound therefrom, varies in proportion to the amount of the web material thereon. A pulse generator is provided for generating pulses which indicate the rotational velocity of the spool and a second pulse generator is provided for generating pulses which indicate the linear velocity of the web material. A counter cou...

A mechanism is disclosed for indicating when toner should be added to a toner reservoir in an electrographic machine. A blade positioned in the reservoir is urged in a direction which actuates a switch if toner in the reservoir offers less than a given amount of resistance to movement in that direction. When the level is low, resistance offered by the toner is below the given amount and the switch is actuated indicating to an operator that toner should be added. A mechanism is also disclosed in ...

An indicating device comprising a housing means having a viewable end means and an expandible element disposed in the housing means, the expandible element having a fixed end and a movable end normally tending to be spaced from the viewable end means of the housing means so as to be in a nonindicating position thereof. Pneumatic means are provided for causing a pressure differential to act across the movable end of the expandible element to expand the element and cause the movable end thereof to...