Abstract: A watthour meter socket adapter includes a housing with electrical contacts which receive the terminals of a watthour meter and terminals which are insertable into the contacts of an electrical watthour meter socket. First and second seal connectors sealingly connect the adapter housing to the socket and a watthour meter to the adapter housing to control access to the socket, adapter and watthour meter. The interface connection includes an electrical connector mounted in an enclosure and connected to the contacts in the adapter housing to provide electrical power to an external interface. A third seal is connected and attached to the enclosure to control access to the electrical connections housed therein. In one embodiment, the enclosure is separate from and mounted on the adapter housing. In another embodiment, the enclosure is in the form of a sleeve mounted internally within the adapter housing with an open end allowing connection to an external electrical device.

Abstract: A protective or purge enclosure provides a positive atmosphere around an operating device such as a hand-held computer or calculator contained therein. The protective enclosure has sufficient flexibility, even though providing a positive, sealed atmosphere, to enable the user to operate the functional features of the device sealed within the enclosure, and the material forming the device is sufficiently transparent to enable the user to view the functional features of the device for operation. A visible indicator provided on the enclosure enables the user to determine if the enclosure is maintaining the positive atmosphere sealed therein.

Abstract: Apparatus for measuring an electrical quantity comprises a fixed body and a movable device having a pivot shaft fixed to an indicator needle which moves in front of a graduated scale. The movable device is pivotably mounted in the fixed body by pivot pins and corresponding bearings. The pivot pins are provided at the ends of the shaft while the bearings face the pins on the fixed body. The movable device is further supported relative to the fixed body by knives and corresponding bearings which receive edges of the knives. The knives are fixed to the movable device and the bearings are provided near the ends of the shaft. The edges of the knives and the pivot pins together with the corresponding bearings are aligned with each other.

Abstract: The modular electronic device includes a main unit and at least one plug-in module adapted to be removably slid on to and mounted on the main unit. There are first and second interfitting connectors respectively on the main unit and the module which automatically interfit when the module is mounted. First and second interfitting track structure are respectively on the module and main unit to facilitate sliding the module onto the main unit. Finally, there is first and second interfitting latching elements respectively on the main unit and the module to hold the module latched in place.

Abstract: A hand held sensor body with a manually extendible two-pronged probe contains an ion meter for both chlorine concentration and for pool water acidity. The sensor is D. C. powered and the probe has dual metallic rods extending from the hand-held probe and terminating in alloy sensor tips. The body of the sensor containing the meter also detachably encases the hand-held probe when the probe is not in use. The meter case tapers downwardly in width to a battery chamber with access for the probe cable. The battery chamber has contacts for connection to the meter and an electrical contact for the control knob for an adjustable potentiometer imposed in the electrical circuit between the meter and the probe.

Abstract: An apparatus for ferromagnetic measurements of electric quantities comprises a coil having a hollow barrel on which a winding of a conductive wire is formed. A unit which is integral with a needle is positioned in the barrel. The needle is displaced in front of a graduated dial between a zero value and a maximum value. The movable unit is formed integrally with a first metallic plate which is displaced, in the course of the measurement of an electrical quantity, relative to a second metallic plate which is fixed in the hollow barrel of the coil, as a function of the magnetic field created by the winding. At least one additional metallic plate is fixed in the hollow barrel of the coil, in such a manner as to cooperate with the movable plate to generate therewith a repulsive force in order to brake the pivoting of the pivotable unit when the electrical quantity to be measured tends to displace the needle of the movable unit beyond the maximum value of the graduation.

Abstract: A circuit condition monitoring system for an electrical power distribution system includes a system connector component having an integrally molded test point socket within which a circuit module is received to provide fault current or voltage loss monitoring of a system conductor within the connector. The test point socket provides capacitive coupling to the monitored conductor without the use of a metallic test point, and a ground return to the electrically conductive outer sheath of the connector. An electrically conductive end cap may be provided to cover the projecting end of the module when the module is installed in the socket. Adapters installed on the other end of the module enable the module to be installed on prior metallic contact-type test points.

Abstract: A portable electrical energy monitor for measuring the electrical energy usage of an appliance or the like is disclosed. The monitor includes an enclosure having a cover for opening and closing the enclosure. An electrical measurement device or circuit is positioned within the enclosure and includes a receptacle plug for complementary interconnection to a receptacle plug of an appliance, also to be received within the enclosure. The cover of the enclosure is closed when the appliance receptacle plug is operatively interconnected to the receptacle plug of the electrical measuring device or circuit. A visual display device is connected to the electrical measuring device and is mounted to the enclosure for visual display of electrical energy usage of an interconnected appliance.

Abstract: A magnet equipped rotating generator wheel cooperates with a stationary sensor cassette containing wire pulse sensors. The sensor cassette is electrically and mechanically fixed to a stiff circuit board to form a structural unit. The generator wheel and structural unit are enclosed within a housing having inner and outer parts, the outer part having a planar front surface. The structural unit is adjustably mounted to the planar front surface of the outer part of the housing of the tachometer. A pair of holes are formed in the circuit board at the air gap location and a corresponding pair of holes in the planar front surface so that the air gap between generator wheel and sensor cassette can be adjusted by inserting a spacing yoke.

Abstract: An electronic instrument is mounted on a handlebar of a bicycle. An instrument carrier is fastened to the handlebar. The instrument itself is engageable with the instrument carrier for holding engagement. A signal receiver is fastened to one leg of a fork which carries a bicycle wheel. The receiver is opposite the bicycle wheel. A signal inducer is mounted on a spoke of the bicycle wheel. The signal inducer generates signals within the signal receiver. These signals are supplied from the signal receiver by a cable to the instrument carrier. The instrument carrier is provided with contacts. Complementary contacts are provided on the instrument. When the instrument is engaged with the instrument carrier the electrical contacts of the instrument carrier and of the instrument come in mutual electrical engagement. At least one of the contacts is provided on a silicon rubber block which is elastically deformable when the contacts of the instrument carrier and the instrument are brought in electric connection.

Abstract: A housing assembly for a pair of side-by-side watt-hour meter sockets. The housing assembly includes a rectangular housing having back, side and end walls. A recessed opening is formed in the back wall to receive a standard panel board chassis. An insulated panel closes the recessed opening in the rear wall. A horizontal partition divides the housing into meter socket and switch compartments. A pair of individually removable cover panels are positioned side-by-side to close the front of the meter compartment. An opening is provided in each cover panel to expose a meter to view. An inwardly-extending partition of electrically insulating material is attached to the side of each cover panel which is adjacent to the other cover panel. The partition terminates short of the insulated panel, closing the rear recessed opening of the rectangular housing to protect its meter socket against accidental contact when the other cover panel is removed from the rectangular housing.

Abstract: A power meter device having a transparent part and an electronic signal transmitter to permit remote meter reading has a thermal and electromagnetic interference shield for protecting the electronic transmitter means from high temperatures and r.f. interference. The shield comprises a metal-organic laminate of black and white polyester layers bonded to respective opposite sides of an aluminum foil so a portion of the foil is exposed by the black polyester along a top edge of the laminate, so portions of the black and white polyesters extend beyond the foil and are bonded together along a bottom edge of the laminiate, to provide a slit near one strip end and an interlocking or detent flap at an opposite strip end and to provide integral ground and mounting tabs in the portion of the metal foil exposed by the black polyester.

Abstract: A device for recording time of energy use for use with standard electric meters having a rotatable disc. The device includes a housing securable within a meter below the disc. A series of mounting holes are formed in the housing for mounting the device within the meter. The holes are arranged such that the device may be mounted within any standard electric meter.

Abstract: A digital panel meter that is mounted in a panel and that is comprised of a housing for containing a circuit assembly having a digital display at the front of the housing. A bezel is adapted to cover the front of the housing and has a transparent window for the viewing of the digital display. The bezel includes a pair of elongated bezel locking arms that are spacedly disposed and extend towards the rear of the housing where they interlock with the housing. The housing is also provided with locking tabs for securing the housing to the panel.

Abstract: A meter of the type having crossed coils, comprises an outer body having a cylindrical wall surrounding the coils, and an insert of an amorphous metal alloy that is disposed in a cylindrical bore defined by the wall. The insert surrounds the coils and is formed by rolling a strip of plate made of amorphous metal alloy. This construction provides an effective magnetic shield.

Abstract: A tamper-resistant removable cover for a utility meter box assembly is disclosed, having a plate member with depending flange portions which engage the securing flange or ring normally used to secure a translucent cover over the viewing window or socket of the meter box. The cover provides a high degree of security for meter boxes, reducing theft of services and/or vandalism that is encountered with conventional methods of securing such boxes. The present cover may use the existing securing device or devices on the box or may be provided with fasteners to engage a portion of the box.

Abstract: Metering apparatus which employs a structure conforming to long accepted industrial standards but which is adapted to meet the requirements for highly versatile solid-state meter circuits having a multitude of outputs both in terms of electrical signals and visual display. The meter structure is provided an EMF and RF barrier coupled to through the interconnection of the meter cover to neutral reference. Further, a key actuated switching input is provided through the cover face of the meter with the use of a pattern of contact surfaces positioned on the inner surface of the face. These surfaces cooperate with spring biased contacts arranged to achieve proper contact with them when the meter cover is rotated into its latched orientation. A separate terminal block is provided which is coupled through a multi-lead connector to the meter circuit and which provides discrete individual terminal outputs readily wired by utility personnel trained in the use of older mechanical metering systems.

Abstract: A battery backup installation for a time of use register for an electric meter is mounted within a case of the electric meter. The case includes a hatch which permits removal and replacement of the battery without requiring removal of the case from the meter. In one embodiment, the battery is installed in a battery clip on the face plate of the meter where it is accessible through the hatch. An extra length of wires from the battery permits the battery, and its mating connectors, to be withdrawn through the hatch for replacement thereof. In a second embodiment of the invention, the battery is captured in a door of the hatch and is withdrawn from the meter by the action of opening the hatch. In this embodiment, the hatch may be hinged or not hinged. Battery replacement is facilitated while the electronic register module is separated from line-supplied power. An auxiliary battery provides an auxiliary source of backup power during batterychange.

Abstract: A support structure is provided that enables an existing kilowatt-hour meter to be updated with additional auxiliary electronic components. The support structure comprises a base ring that is shaped to be received within a circular slot of an existing kilowatt-hour meter and latches are provided that lock the base ring between the existing base portion of a kilowatt-hour meter and its frame. A plurality of support plates are attached to the base ring by a plurality of posts. The base ring and posts are disposed in a radial pattern about the central axis of symmetry of the base ring in such a way so as to permit the support structure to pass over and extend beyond the existing components of the original kilowatt-hour meter. Electrical connection between existing meter components and auxiliary electronic components is provided by flexible ribbon connectors, cables or individual conductors and an elongated cover is used to provide protection of both the original kilowatt-hour meter and the auxiliary components.

Abstract: A fire-preventive and flame-proof housing for line delay measuring apparatus, the components including a high-tension voltage supply, a display tube and operating elements and indicator elements, comprises a first section defined within the housing in which are positioned components carrying relative low voltages and without significant fire hazard, a second section defined within the housing adjacent to the first section, wherein are positioned those of the components carrying high voltages, and such components as are otherwise intrinsically unsafe, the second section being hermetically sealed and filled with insulating material. The housing includes a front panel and a partition separating the first and second sections, a cover is detachably mounted on the housing and sealed relative thereto by a resilient sealing element about an aperture of the housing.

Abstract: A meter junction box for enabling the safe, accurate and efficient measuring of components of multi-phase electric power includes two separate spaced enclosure housings. The two housings are interconnected by a plurality of electrically conductive, non-magnetic conduits which are environmentally sealed at each end thereof in a manner to secure the interior of each housing from the adverse effects of the environment. A single, insulating jacketed electrical conductor passes through each of the respective conduits from one of the housings to the other. The individual conduits provide a means whereby a hook-on type ammeter may be functionally and individually connected with the conduits to measure the current in the conductor passing therethrough.

Abstract: A hermetically encased instrument includes a tubular housing with a front window glass, and a rear opening and a peripheral groove in its rear inside face, an instrument unit movably located in the housing and having a front meter observable through and limited in forward movement proximate the window glass; and a locking and sealing assembly mounted on the rear of the instrument unit and springs urging the asesmbly rearwardly, the assembly including a circular closure plate with a rearwardly facing stepped periphery engaging a rubber O-ring and a sealing plate coaxial with the closure plate and retained thereon by screws, the forwardly pressing of the assembly and the tightening of the screws loading the springs and distorting the O-ring into sealing engagement with the groove and the surrounding faces of the closure and sealing plates and housing to releasably lock the instrument unit in the housing and hermetically sealing the housing rear opening.

Abstract: A pair of uniquely designed spring clips are snapped onto existing elements of a visual indicator such as the dial of a utility meter. An encoder having attachment elements with a spacing therebetween corresponding to the spacing between the clips is attached to the clips to quickly, easily, and precisely attach the encoder to the dial in properly aligned position.

Abstract: An electrical energy meter for measuring various parameters of electrical energy consumption has a cover-mounted time-of-day multifunction register. Digital signals representative of electrical energy usage are input to the time-of-day multifunction register which measures energy consumption during the on-peak, off-peak, and intermediate-peak periods of each day. The multifunction register communicates by way of light radiations with an external programmer/reader unit having a plurality of fingers at its front face. These fingers engage recesses in the meter cover for accurate alignment of the multifunction register and the programmer/reader unit. Attaching the multifunction register to the meter cover rather than to the meter frame offers improved alignment between the multifunction register and the programmer/reader unit and provides easy retrofitting of present watthour meters lacking the time-of-day feature with a time-of-day multifunction register.

Abstract: Multi-purpose measuring device with a tilting display which includes a display assembly with a housing for visually indicating a measured value of a variable to be analyzed, an auxiliary assembly with another housing separate from the display assembly housing for performing measurements, a hinge interconnecting the housings permitting relative tilting of the housings in two directions into different planes at an angle relative to each other and into a common plane, and a carrying strap fastened in vicinity of the hinge, the auxiliary assembly having dimensions and weight in proportion to the display assembly causing the center of gravity of the measuring device to lie in vicinity of the auxiliary assembly and causing the auxiliary assembly to hang downward from the carrying strap with the display assembly disposed above the auxiliary assembly.

Abstract: In order to allow a wide range of instruments to be assembled from standard modules, there is provided a range of different diameter housings with their glasses spun in and sealed by an O-ring. A housing can be trimmed to length as required. Different types of panel mountings can be fixed over the front rim of the housing. One of a range of standard movements is mounted between plates and matched to the housing diameter and retained therein by releasable catches. The catches may be turnbuttons cooperating with pegs projecting inside the housing. Alternatively, leaf spring catches slidable radially outwardly on the plate can engage in an annular groove inside the housing and be locked in position by clamp screws. The rear end of the housing is plugged by an O-ring sealed base which carries either a terminal part/connector structure only or also a range scaling circuit enabling the same movement to handle different input signal ranges. The pointer on an offset arm sweeps over a scale which can be hub lit.

Abstract: Portable multimeter, including an indicating subassembly for visualizing a measured value of a measuring variable to be examined, a processing subassembly for converting or adapting the measuring variable, separate housings for the subassemblies being connected to each other and having edges about which the housings are swingable for folding together into a rest position, control and indicating parts to be protected being disposed toward the inside of the housings in the rest position, a bead disposed in the vicinity of the edges forming a hinge and increasing the useful interior space of the housings, the hinge including at least one interacting hinge element being integral with each housing and rotatably connecting the housings together.

Abstract: A rigid frame attachment for resisting tampering with an electrical meter. Angle irons enframe the meter face, with frame portions extending rearwardly along a lateral wall of the meter housing to rear frame portions engaging the rear wall of the housing. The front of the frame is attached, as by a lock, to the meter front wall at a point spaced from the side walls of the housing.

Abstract: A pilfer proofing system and method for electric meter boxes having a meter base box, which carries a plug-in terminal block set and a meter box cover having an opening through which a plug-in-meter passes to engage contact jaws or sockets the terminal block set. An anchoring bar is secured to the meter stops and a conventional meter locking collar is secured to the cover and the bridge of the locking collar is secured to the anchoring bar. Metal extension adaptors are secured to the meter blades for entering into the contact jaws or sockets of the terminal block set and a conventional locking ring is utilized to lock the meter in place on the added meter collar thereby providing a substantial obstacle to easy pilfering of electricity.

Abstract: A modular analog/digital display for use in a cylindrical aircraft instrument housing is designed to enable the digital components to be assembled without interference to the analog meter mechanism. The digital display is of the leadless type and is clamped under compression to a circular circuit board with a pair of contact strips in registration with contacts formed on the circuit board and digital display. The design also features a screw-on dial pointer which facilitates the assembly of the digital display components and dial to the analog meter mechanism without interference.

Abstract: The invention relates to a limited rotation galvanometer having a shaft adapted to be deflected in accordance with an electrical drive signal applied to the galvanometer, the galvanometer comprising a stator assembly formed of at least one stationary permanent magnet and at least one pole piece cooperatively arranged about a hollow bore, a rotor associated with the shaft and mounted to turn in the hollow bore, and an electrical winding wound about the pole piece and adapted to receive the drive signal, this stator assembly and rotor defining magnetic circuitry for operation of the galvanometer, the deflection of the rotor being dependent upon the rigidity of the stator assembly and the value of the torque applied between the stator assembly the rotor by the application of the drive signal to the winding.

Abstract: An electric energy meter has a programmable time based measuring system carried in a sealed enclosure for mounting the meter at a metering location. A radiation sensitive external data interface receives and transmits data encoded radiations through a transparent communications window of the enclosure. Pulse data is processed by the external data interface in serial data bit transmissions in and out of the measuring system for programming, readout and testing of the system.

Abstract: An apparatus for retaining a replaceable battery comprised of a unitary structure having a chamber therein for receiving a battery and a resilient retaining means cooperating in the chamber with the battery provides a structure for easily replacing a battery. The apparatus is particularly adaptable to a programmable electrical watthour meter where a battery and programming connector in the watthour meter must be accessed through an access port in a housing of the watthour meter to replace the battery and service the watthour meter.

Abstract: An electrical instrument that includes two probes extending therefrom for contacting various points of other electrical devices being checked; the instrument including a case containing an electrical circuit between the probes, the circuit including a battery, switch and indicator lamp, and one of the probes being on an extension cord that winds up around the case for storage and in which position the probes align adjacent to each other for fitting in an electric outlet socket and the like.

Abstract: A miniature electrical tester provides a wide range of voltage and electrical continuity testing capabilities. A molded plastic front case has a partition which separates it into a circuit compartment and a test lead compartment. A circuit board is located in the circuit compartment, and test leads which are connected to the circuit board are stored in the test lead compartment when not in use. A molded plastic back cover has a circuit cover section which covers the circuit compartment, a test lead cover section which covers the test lead compartment, and a flexible hinge section located between the circuit and test lead cover sections. The positioning of batteries and the innerconnection of the batteries within the circuit compartment, together with the location of the remaining components of the circuit board permit the circuit board to be held securely in place by a single screw and a compression pad.

Abstract: An electric utility meter includes a detachable anti-static plastic cover having an electroconductive layer on the cover front face. The conductive layer extends between the cover and a dial pointer of the meter. An electric contact projects into the interior of the cover so as to make contact with the meter chassis when the cover is assembled to the meter.

Abstract: The meter is primarily adapted to replace a standard analog panel meter and is designed to selectively receive different ranges of input signals such as DC input signals in ranges extending from 50 mVDC to 500 VDC. In the disclosed embodiment there are four ranges also adapted to receive AC input signals in ranges extending from 100 mVAC to 480 VAC. Preferably, a jumper is used to select the different ranges. The jumper is readily accessible at the rear of the meter. The meter circuitry comprises an analog to digital converter having three digit, seven segment display and input circuitry including a range circuit, an operational amplifier and filter circuitry coupling serially to the converter.

Abstract: A tamper-detection switch is built into a device such as an encoder for a gas or water meter. The switch has a contact arm biased to complete an alarm circuit, but this is prevented by a restraining post. On installation, an actuator is moved by contact with the meter to lift the contact arm free of the restraining post, at the same time restraining the arm from completing the circuit. If the encoder is subsequently moved away from the meter, a biasing spring causes the actuator to move out of the path of the contact arm, freeing it to complete the alarm circuit.

Abstract: The sealing device is used to interconnect a base of an electrical meter of the type having a transparent enclosure secured to the base and a flange connected to and spaced outwardly from a meter socket. The device includes concentrically disposed inner and outer bands. The inner band is provided with spaced apart limbs which straddle the base and flange and thereby interconnect them. The inner band is also provided with flaps which contact the adjacent inner wall of the outer band. The flaps permit movement of the outer band to a position in which it maintains the inner band in place but resists movement of the outer band away from such position.

Abstract: An electrical meter for use with a standard watthour meter and a standard meter socket having a housing which includes a display area, a meter receiving section having a base plate which supports a plurality of jaw members positioned to receive the blades of a standard watthour meter, meter socket engaging blades extending rearwardly of the housing and positioned to engage the jaws of a standard meter socket, an electrical meter assembly supported within a longitudinally disposed part of the housing and in tandem relation with the watthour meter and the meter socket including an indicator located adjacent the display area, a plurality of conductors connecting the blades to the jaw members, the electrical meter assembly being coupled to at least one of said conductor means to provide a power measurement on the indicator, the housing and the electrical meter assembly in said housing being located within a circumference defined by the rearward projection of the circumference of the base of the standard watthour

Abstract: An electric load research device includes an enclosure having a pulse data recorder and an adjustable meter mounting arrangement for attaching an impulse sending electric meter. The meter is attachable in different rotated positions within the research device enclosure for connecting the device at a utility customer's meter socket in different orientations to avoid adjacent obstructions.

Abstract: An enclosure for watthour meters includes a cover having an opening for connecting a meter data sending unit within the enclosure to an adjacent remote meter reading terminal unit. A cover locking rim has locking tabs for securing the cover to a meter base assembly so that the cover is rotatably positionable relative to the base. The rotated positions of the cover opening permit different orientations of a remote meter reading package at a fixed meter mounting position.

Abstract: A galvanometer mechanism including a circuit board having an electrical circuit printed thereon and defining a plug portion for insertion into a galvanometer control console receptacle. The circuit board further includes a magnet fixed thereto. A torsion bar secured between legs of the magnet supports an electrical coil which is responsive to an applied signal and is operatively connected to printing apparatus.

Abstract: Apparatus for attachment to watt-hour meter apparatus of the type commonly used to measure electrical power consumption, to prevent from being misinstalled so as to run the meter backwards. A first obstruction member or members are provided within the box which receives the watt-hour meter, and a second obstruction member is secured to the meter. These obstructions are asymmetrically disposed with respect to mating electrical contacts on the meter and within the meter box, so that the obstructions on the meter and in the meter box confront one another and prevent the meter from being installed in an inverted position which causes the meter to run backwards.

Abstract: A variable-rate electric adapting device for use with a watt-hour meter of the single- or polyphase induction-type, the adapting device being arranged to generate a controlled variable-rate input to the magnetic circuit of the meter to vary the drive of the meter motor in accordance with programmed rate versus time profiles stored in a programming element of the device, the latter being either pre-programmed or continuously programmed by data link. The programming element is arranged to address the adapting device only at discrete intervals of time coinciding with control signals from a timing device. The profile constants may be changed by data links, temperature transducers, voltage amplitude detectors and load detectors. Additional outputs are derived from the programming element to allow individual loads to be connected and disconnected.

Abstract: An electronic instrument module for detecting and measuring the forward and reflected RF voltage wave signals on a coaxial transmission line. The instrument is integral with a coaxial line section adapted to be electrically inserted in a tubular transmission line, the line section having an elongated conductive metal body with a central cylindrical opening with a coaxial center conductor therein electrically insulated from the metal body. The metal body also has a transverse opening communicating with the central cylindrical opening and adapted to receive an inductive pick-up coil mounted on the body for rotation in the opening about an axis normal to the axis of the line section. The pick-up coil is responsive to the voltage wave signal on the transmission line.

Abstract: An electrical device such as a panel meter with a body including an abutment, is inserted through an opening in a panel with the abutment on one side of the panel, and is secured to the panel with a nut plate on the other side of the panel. The body of the meter has plural teeth, discontinuous around the periphery of the body and the teeth extend from opposite sides of the body. The nut plate has an opening with flexible sides to enable snapping the nut plate over the body and teeth to a position abutting the panel to clamp the meter to the panel. Portions of the opening in the nut plate are enlarged so that moving the nut plate to a position in which the body teeth are adjacent the enlarged portions of the opening releases the nut to permit immediate and rapid removal of the meter from the panel. There are several teeth at each side of the body to enable mounting and securing the meter in panels of substantially different thicknesses.

Abstract: An electrical apparatus enclosed within a housing which contains a replaceable battery, and is provided with means for programming and/or testing by means of connectable electrical contacts with an independent instrument. The electrical apparatus is provided with a composite unit comprising a battery support and an electrical terminal connector which is arranged to cooperate with a single small access port in the apparatus housing whereby routine servicing of battery replacements, programming and/or testing, can be performed through the single port.

Abstract: A watthour meter cover is permanently locked to the meter base assembly by an irremovable fastener applied to the base at a concealed location.

Abstract: An electric load research device includes an enclosure having a pulse data recorder and an adjustable meter mounting arrangement for attaching an impulse sending electric meter. The meter is attachable in different rotated positions within the research device enclosure for connecting the device at a utility customer's meter socket in different orientations to avoid adjacent obstructions.