| Patent Number |
Title Of Patent |
Date Issued |
| D270482 |
Electric lamp |
September 6, 1983 |
|
| D264580 |
Electric battery |
May 25, 1982 |
|
| 4469145 |
Method of making battery plates |
September 4, 1984 |
| This invention is a method of making negative battery plates in a continuous process, in which a skeletal grid is cast continuously to have the structure of a number of plate grids side by side and longitudinally integrally connected together in the casting. After casting the skeletal |
| 4448863 |
Electric storage batteries |
May 15, 1984 |
| A battery has a container sealed by a lid in which two shallow recesses are formed. Within each recess is a terminal which does not project out of the recess and which has a tapped hole afforded by a hard metal insert. Two elongate terminal connectors are provided with a hole at one end |
| 4399607 |
Method and apparatus for making recombinant storage batteries having coated intercell connectors |
August 23, 1983 |
| A method of manufacturing a recombinant lead acid battery includes placing two or more cell packs in a battery container and then loading the container into a frame mounted on a rotary capstan. The container is transferred to a moulding station and the plate straps and intercell conn |
| 4387326 |
Variable reluctance motor systems |
June 7, 1983 |
| A variable reluctance electric motor system includes a variable reluctance motor having a main winding for each phase and a power converter circuit including a main thyristor in series with each main winding connected across a direct voltage source from which the main windings are suppli |
| 4380792 |
Pivot mounting |
April 19, 1983 |
| This invention is a pivot mounting for a lamp (12) comprising a pair of journal bearings (30) and two parallel semi-circular springs (14, 16) urging the bearings towards one another, the bearings having gripping surfaces (56) for the mirror. The springs (14, 16) allow the bearings to |
| 4373015 |
Electric storage batteries |
February 8, 1983 |
| Recombination lead acid electric storage battery of sealed or recombinant type in which the gas evolved during operation or charging is induced to recombine within the battery at the battery electrodes. |
| 4348619 |
Variable reluctance electric motor systems |
September 7, 1982 |
| A variable reluctance electric motor system including a variable reluctance motor having main windings (A,B,C,D) and auxiliary windings closely coupled to the main windings, a main storage battery for driving the motor terminals (10,11) (that will be referred to as DC supply terminals), |
| 4333134 |
Converters |
June 1, 1982 |
| A high frequency converter of push-pull form comprises a center tapped D.C. input supply 16, 17, 18, two solid state switching devices (20, 21) connected in series across the D.C. input terminals, a load circuit including a supersonic frequency transformer 30 and an output rectifier |
| 4332629 |
Method of making extended strip of lead-antimony alloys for battery electrodes |
June 1, 1982 |
| A method of making an extruded strip less than 1.27 mms thick of lead antimony alloy containing 1 to 2% by weight antimony, the strip having an aspect ratio in excess of 10:1 comprises supplying the alloy at a temperature of 200.degree. C. to 280.degree. C. to an extrusion die and fo |
| 4331747 |
Electric storage batteries |
May 25, 1982 |
| A battery includes a plurality of frames of plastics material, each frame comprising a perimeter member and one or more division elements together defining two or more active material support spaces. The frames are arranged in a stack and the perimeter member and division elements of eac |
| 4315058 |
Vent plugs for electric storage batteries |
February 9, 1982 |
| A vent plug includes a thermophastic tubular body for insertion in an aperture in the lid of a battery. The vent plug has at its upper end an integral lid with a gas venting aperture formed therein. A removable insert is secured within the tubular body and defines a tortuous gas vent |
| 4289176 |
Battery filler |
September 15, 1981 |
| A device for filling or topping-up batteries, including a trolley, a reservoir for acid or distilled water, and conduits for connection to the inlet and the outlet ends of a series of filler devices, one on each battery cell. At the end of the series a conduit is connected to a sump on |
| 4276358 |
Electric batteries |
June 30, 1981 |
| An electric battery has one or more cells in a single container and an outer lid. The container and the outer lid have respective divergent engagement surfaces comprising the lower surface of a ledge on the container and the upper surface of a slot in the lid respectively. Fastening |
| 4253053 |
Reluctance electric motor drive systems |
February 24, 1981 |
| In a variable reluctance electric drive system motor the fractions of a cycle during which the winding inductance of a phase increases with movement in either direction are such that the motor is self starting in either direction. The timing of the power converter in relation to the |
| 4245013 |
Battery separators |
January 13, 1981 |
| A synthetic pulp separator for a lead acid battery, the separator having two or more plies and a ribbed profile the surface adapted to face the positive having a higher content of synthetic pulp than the other surface. |
| 4233070 |
Lead alloys for electric storage battery |
November 11, 1980 |
| A lead alkaline earth metal alloy comprising lead, calcium, barium or strontium or mixtures thereof in an amount of 0.075A/40% to 0.13A/40% by weight where A is the atomic weight of alkaline earth metal 0.005% to 0.05% magnesium and preferably 0.005% to 0.01% aluminium is disclosed and |
| 4227243 |
Converters |
October 7, 1980 |
| A converter includes a resonant oscillatory tank circuit comprising a capacitor and an inductor, at least one switching circuit including a solid state switching device in parallel with a diode connected to apply a predetermined potential difference from a DV supply to the inductor, and |
| 4227141 |
Electric battery charging apparatus |
October 7, 1980 |
| For use in an automatic electric battery charger, a charge controller which monitors the rate of rise of battery voltage, and terminates the charge when the rate of rise falls below a predetermined value, typically 11 mV per cell in 45 minutes for a lead-acid battery. The battery voltage |
| 4219612 |
Vented filling plugs for electric storage cells |
August 26, 1980 |
| A vented filling plug for an electric storage cell has a vent path including a flame trap through which gas may enter or leave the cell arranged so as, in use, to communicate with the interior of the cell at a point above the normal electrolyte level. The flame trap includes a liquid |
| 4213080 |
Automatic electric battery charging apparatus |
July 15, 1980 |
| An automatic electric battery charging apparatus which includes terminating means comprising a bistable circuit having set and reset conditions, means for supplying a control signal dependent on battery voltage on charge through a capacitor to an input of the bistable circuit, so as to s |
| 4207384 |
Electric storage batteries |
June 10, 1980 |
| There is disclosed a sealed lead acid button cell having a moulded acid resistant polymer case formed in two portions each portion having a central boss with a passage leading into the cell, and a metal plug located in the said passage, the inner end of the plug being electrically co |
| 4196469 |
DC-AC Converter including synchronized switching |
April 1, 1980 |
| A converter includes a resonant oscillatory tank circuit comprising a capacitor and an inductor, at least one switching circuit including a solid state switching device in series with a diode connected to apply a predetermined potential difference from a DV supply to the inductor, and |
| 4191918 |
Automatic electric battery charging apparatus |
March 4, 1980 |
| An automatic electric battery charger which detects when the battery is fully charged by monitoring the rate of rise of battery voltage; when the rate of rise falls below a predetermined value, the charge is terminated. The rate of rise of voltage is detected by comparing an unprocessed |
| 4174004 |
Electric storage batteries |
November 13, 1979 |
| There is disclosed a plant for pasting battery plates comprising a pasting machine comprising a flat conveyor belt and paste applying means for forcing paste into a grid conveyed on the conveyor past the said paste applying means, grid feeding means, and a transportable hopper and me |
| 4163933 |
Automatic electric battery charging apparatus |
August 7, 1979 |
| The automatic electric battery charging apparatus includes at least one timer, a voltage comparator arranged to compare a reference voltage, referred to herein as a staircase voltage, with a control signal varying with battery voltage, jacking means rendered operative by the timer when a |
| 4161503 |
Method of making multitubular sheaths |
July 17, 1979 |
| A method of making a multitubular sheath comprising providing a porous multitubular fabric impregnated with thermoplastic or deformable polymer, continuously feeding the fabric onto an array of parallel metal rods, one tube to each rod, the rods having straight sizing portions, while hol |
| 4156756 |
Battery terminals |
May 29, 1979 |
| An electric cell has a terminal post of which one end is of reduced diameter and passes through a hole formed in a wall of the cell and at least a part of which is screw threaded and carries a nut. The terminal post has a shoulder which is drawn by the nut towards the inner side of t |
| 4146830 |
Automatic electric battery charging apparatus |
March 27, 1979 |
| A battery charger which provides a constant current charge during a first part of the charging period and a taper charge during the remainder of the charging period. The taper charge characteristic is obtained by decreasing a set value for the charging current by a step of predetermined |
| 4136310 |
Automatic electric battery charging apparatus |
January 23, 1979 |
| A controller for incorporation in a battery charger to limit the overall length of the charge, and also to provide short topping-up charges at intervals after the main charge has been completed, if the battery is left connected to the charger. The controller allows the limit on the lengt |
| 4135340 |
Modular drill rig erection systems |
January 23, 1979 |
| A system for erecting elevated floors where a first support floor with a drawworks thereon is connected to one end of a base structure by two pair of parallel spaced pivotable links and a second support floor is coupled to the opposite end of the base structure and by two pair of paralle |
| 4129692 |
Electric storage batteries |
December 12, 1978 |
| There is disclosed an electrode structure for an electrochemical cell comprising a fibrous support made of organic polymeric material, which is 0.1 to 3 mm. thick, carrying a pattern of solid conductors extending over the surface of the porous support from a current take off region to |
| 4125690 |
Battery electrode structure |
November 14, 1978 |
| There is disclosed a battery electrode structure made of a lead-calcium-tin alloy comprising 0.075 to 0.13% by weight calcium, 0.005 to 0.99% by weight tin and 0.0001% to 0.1% by weight aluminium, the balance being substantially lead. |
| 4124042 |
Manufacture of battery plates |
November 7, 1978 |
| There is disclosed apparatus for filling enveloped plates for batteries with active material which comprises at least one filling station comprising means for supporting the envelope of a plate assembled on its current conducting element in a substantially vertical plane and a filling |
| 4119772 |
Lead acid cells and batteries |
October 10, 1978 |
| A sealed lead acid cell is disclosed which has electrodes comprising metallic supports which minimize the evolution of hydrogen and resist deformation under their own weight, and which are separated by at least one layer of separator material, the capacity of the negative electrodes |
| 4113926 |
Cell racks |
September 12, 1978 |
| A cell rack includes two generally planar rectangular end elements and any number of spacer elements of spider form. Each rack element affords horizontal surfaces for supporting an adjacent cell and a number of vertical surfaces for spacing the cell from the rack elements and further |
| 4091320 |
Automatic electric battery charging apparatus |
May 23, 1978 |
| Automatic battery charging apparatus in which a control signal is generated by subtracting a signal representing a fraction of the mains supply voltage from the battery voltage so that the control signal represents the state of charge of the battery irrespective of variations in the main |
| 4076058 |
Electric storage batteries |
February 28, 1978 |
| There is disclosed a method for preparing enveloped plates for batteries which comprises introducing an active material composition into the porous envelope of an enveloped plate when the envelope is assembled on the current conducting element of the plate characterized in that the activ |
| 4064325 |
Electric storage batteries |
December 20, 1977 |
| An electric accumulator having an alkali metal as the reactant at the negative electrode, and a cationically conductive separator physically separating the reactant at the negative electrode from a reactant at the positive electrode, while permitting passage of cations of the alkali |
| 4061843 |
Battery plates |
December 6, 1977 |
| There is disclosed an improved tubular battery plate comprising a porous envelope enclosing a current collector comprising an array of members extending perpendicularly from an end member which affords a current take off lug with active material disposed between the perpendicular current |
| 4053695 |
Lead acid cells and batteries |
October 11, 1977 |
| A sealed lead acid cell is disclosed which has electrodes comprising metallic supports which minimize the evolution of hydrogen and resist deformation under their own weight, and which are separated by at least one layer of separator material, the capacity of the negative electrodes |
| 4051876 |
Manufacture of tubular type battery plates |
October 4, 1977 |
| There is disclosed a method for preparing enveloped plates for batteries by introducing an active material composition containing liquids into the porous envelope of the plate, when the envelope is assembled on the current conducting element of the plate, the active material composition |
| 4051304 |
Electric batteries |
September 27, 1977 |
| A battery is disclosed in which each cell electrode structure comprises an assembly of a single first electrode of one polarity separated by a separator from a single second electrode of the other polarity, the assembly being arranged to provide an array of multiple layers of electro |
| 4048400 |
Multicell electric batteries |
September 13, 1977 |
| A multicell electric battery has an intercell partition, the faces of which comprise two parallel conducting sheets connected together, as by spot welding, by means of one or more symmetrically positioned dimples, which constitute intercell connectors. Each conducting sheet is electrical |
| 4046642 |
Method of making electric storage batteries |
September 6, 1977 |
| A method of generating electrochemical activity in positive plates of Plante cells is disclosed. An agent corrosive to the unformed pure lead positive plate is incorporated in the electrolyte and the cell charged, the corrosive agent being selected to be destroyed by the anodic condi |
| 4041212 |
Alkaline electric storage batteries |
August 9, 1977 |
| The plates of each polarity of an alkaline battery are connected by a sheet metal connector which passes through a slot in the bottom of a well formed in the battery lid, and which is supported by means of a pair of ears projecting from the connector which rest on the lid. Each connector |
| 4037630 |
Manufacture of battery plates |
July 26, 1977 |
| There is disclosed a method for preparing enveloped plates for batteries by introducing an active material composition containing liquids into the porous envelope of the plate, when the envelope is assembled on the current conducting element of the plate using an active material comp |
| 4020882 |
Manufacture of battery plates |
May 3, 1977 |
| There is disclosed a method for preparing enveloped plates for batteries which comprises introducing an active material composition into the porous envelope of an enveloped plate when the envelope is assembled on the current conducting element of the plate, characterized in that the acti |
| 3979658 |
Automatic electric battery charging apparatus |
September 7, 1976 |
| An automatic battery charger of taper type has means for comparing a reference signal with a control signal varying with battery voltage, and terminating the charge when the rate of rise of battery voltage falls below a predetermined value. To prevent spurious operation due to mains |
