Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4595648 | Radiation-sensitive plates formed using diazonium salts A radiation sensitive compound contains at least two groups having the structure ##STR1## in which Ar represents a divalent or other polyvalent radical derived from an aromatic or heteroaromatic compound; X and X' which may be the same or differ... | 06/17/1986 |
| 4492470 | Measuring microscope In a measuring microscope for measuring the distance between line elements of an optical image, means are provided for forming from an image-carrying beam, carrying the optical image, further image beams in which light of respective complementary regions ... | 01/08/1985 |
| 4459933 | Marine tether anchoring device A marine tether anchoring device comprises an anchor body and a segmented spring collet that moves axially relative to the anchor body. As the anchor body moves downwardly relative to the collet the upper end of the collet is expanded by a wedge structure... | 07/17/1984 |
| 4396017 | Transcutaneous gas sensor A transcutaneous gas sensor for application to the body surface of a patient is provided. The sensor includes a sensing electrode having an exposed surface region which, in use, is applied to the body surface of the patient with an electrolyte layer betwe... | 08/02/1983 |
| 4365573 | Steering gear for ships A ship's steering gear of the type operated by liquid under pressure incorporates two liquid systems each containing a pump fed from its own supply tank and a thruster unit capable of providing by itself steering action on a steering member. The two syste... | 12/28/1982 |
| 4364323 | Vertical stressed mooring tether in a floating oil platform A floating platform intended to be anchored to the sea bed incorporates a substantially vertical tether. The tether is fitted with a gas-operated tension spring device capable of generating an elastic tensile force in the tether. Means is provided for var... | 12/21/1982 |
| 4359960 | Marine tether anchoring device A releasable marine tether connection comprises a tether having a segmented spring collet which can be expanded to become trapped in an anchor chamber. A spigot is provided in the base of the chamber which urges the plug upwards relative to the collet whe... | 11/23/1982 |
| 4350756 | Processing of radiation sensitive plates A developer for processing image-wise exposed negative-working radiation sensitive plates based on organic solvent soluble diazo resins or certain photocrosslinkable resins or photopolymerizable olefinically unsaturated compounds includes a surfactant and... | 09/21/1982 |
| 4335617 | Flowmeter A flow transducer assembly (1) comprises a body (2), through which extends a passage (3) for carrying a fluid whose flow-velocity is to be measured. The body defines an inlet mouth (7) for the passage (3) which is so shaped as to provide, in use, a region... | 06/22/1982 |
| 4331075 | Value setting mechanism, particularly for franking machines A value setting mechanism constituting an interface between printing mechanism and an electronic accounting system in a franking machine has each value precisely set without possibility of alteration during a printing cycle. A four digit value can be set ... | 05/25/1982 |
| 4319568 | Liquid dispensing apparatus Liquid dispensing apparatus comprises a T-tube (9) of which the limb tube serves as a closed reservoir (8) for liquid, with an air space above. Liquid is pumped by a peristaltic pump (A) through a tube (6) and one arm of the T-tube into the reservoir unti... | 03/16/1982 |
| 4313105 | Encoding switches Where switches are used for encoding decimal digits into binary words for use in processing devices in, for example, postal franking machines where security is essential, failure modes that produce normal codes not corresponding to the input decimal digit... | 01/26/1982 |
| 4310087 | Single revolution clutches, particularly for franking machines A single revolution clutch in a reduction gear in a franking machine is designed to avoid fraudulent operation and double cycling and for economical production by arranging a worm to drive a split worm wheel having a gap in each arcuate row of teeth respe... | 01/12/1982 |
| 4303287 | Locking mechanism for a storage cabinet Initial opening movement of a drawer in a cabinet by cam action raises a locking bar to lock the other drawers closed. In so doing the locking bar rotates a pinion having an arm which stresses a spring carrying it past an over-center position to maintain ... | 12/01/1981 |
| 4296983 | Edge joint for sheets Adjoining edges of sheets of pre-coated metal or other rigid material may be interlocked against movement transversely apart by forming the edge of a first sheet with a lock member constituted by a transversely offset reverse flange having at its extremit... | 10/27/1981 |
| 4296194 | Positive-working light sensitive diazo materials with azo dye A positive working light-sensitive composition comprises in admixture (a) a first component which is an azo dye formed by reacting a p-amino-benzene diazonium salt and a compound including the grouping ##STR1## and (b) a second component which includ... | 10/20/1981 |
| 4295134 | Liquid flow detecting device A liquid flow detecting device incorporates a static member arranged to be fixed within a passage through which flow of an operating liquid is to take place and an active member held captive by the static member but free to move relatively to the static m... | 10/13/1981 |
| 4294910 | Printing plates A method of treating a plate comprising a substrate carrying an image includes the step of providing a shield on the plate prior to heating the plate so as to prevent contaminants contacting the plate during the heating step. The plate may be a radiation ... | 10/13/1981 |
| 4288022 | Underwater explosive welding First and second underwater tubular members are assembled together so that the outer surface of the first tubular member and the inner surface of the second tubular member are spaced apart to form an annular cavity. The cavity is sealed, cleaned and dried... | 09/08/1981 |
| 4287532 | Image-shearing apparatus Image-shearing apparatus comprises a television camera tube for receiving an optical image from a microscope objective. Electrical circuitry receives the output signal from the camera tube and provides a display image in which a horizontal band is uniform... | 09/01/1981 |
| 4286874 | Diffractometer A diffractometer comprises means for illuminating a specimen plane and a lens for converging rays diffracted from the specimen plane. In order that existing optical apparatus may readily be adapted for use as a diffractometer, the illuminating means (12a,... | 09/01/1981 |
| 4286875 | Diffractometer A diffractometer comprises means for illuminating a specimen plane and a lens for converging rays diffracted from the specimen plane. In order that existing optical apparatus may readily be adapted for use as a diffractometer, the illuminating means (12a,... | 09/01/1981 |
| 4255966 | Hardness testing apparatus Hardness testing apparatus, for use in assessing dimensions, from which a hardness value can be determined, of an indentation formed under controlled conditions in a surface of a specimen, having a photosensitive detector for sensing brightness over an im... | 03/17/1981 |
| 4254244 | Light-sensitive materials A light sensitive material suitable for coating onto a support to produce a light sensitive plate for use in, for example, the manufacture of a printing plate comprises groups of the formula: ##STR1## attached to carbon atoms, wherein ##STR2## ... | 03/03/1981 |
| 4247328 | Lithographic fountain concentrates containing a desensitizing material in an organic solvent liquid A concentrate for dilution with water to obtain a fountain solution for lithographic printing comprises a lithographic desensitizing material dissolved in a vehicle liquid comprising an organic solvent liquid optionally in admixture with water. Preferred ... | 01/27/1981 |
| 4240737 | Processing of radiation sensitive devices During the processing of an image-wise exposed radiation sensitive device, such as a radiation sensitive plate for lithographic printing plate production, by contacting the device with developer liquid, a temperature sensitive member is immersed in the de... | 12/23/1980 |
| 4238067 | Drying of cavities Water filled cavities are dried by replacing the water with a first liquid which is miscible with water and this is then replaced by a second liquid which is miscible with the first and which has a high vapor pressure. The second liquid is then replaced b... | 12/09/1980 |
| 4234199 | Sealing arrangements A sealing arrangement for providing a fluid tight seal between the rim of a skirt or like member and a second member is in the form of first and second resilient concentric rings for mounting on the rim. The first ring is a sealing ring which has an annul... | 11/18/1980 |
| 4224936 | Transit isolator A transit isolator which comprises: (i) a first frame including (a) a pair of spaced generally parallel horizontal members, from which is slidably suspended an isolator in the form of a flexible film envelope having a plurality of sleeves in the sides the... | 09/30/1980 |
| 4222262 | Hardness testing apparatus Hardness testing apparatus, for use in assessing dimensions, from which a hardness value can be determined, of an indentation formed under controlled conditions in a surface of a specimen, having a photosensitive detector for sensing brightness over an im... | 09/16/1980 |
| 4213720 | Tensioning of members A plurality of members such as riser pipes are linked by means of a plurality of cylinders to a frame to which tension is to be applied. Each member is linked to the frame by a separate cylinder and the cylinders are interconnected so that the hydraulic f... | 07/22/1980 |
| 4204640 | Document handling apparatus Cost saving and improved reliability are achieved in document handling apparatus controlled by code markings on the documents. By using only as many reading heads as there are channels containing code markings one after another in a predetermined feeding ... | 05/27/1980 |
| 4202699 | Lithoplates of quaternary ammonium salt compositions A radiation sensitive composition comprises a quaternary ammonium salt and a chemical sensitizer of the formula ##STR1## wherein R21 is aryl, arylalkenyl or arylalkyl, R22 is aryl, alkyl, arylalkenyl, arylalkyl, carboxylic acid ... | 05/13/1980 |
| 4196845 | Bar-coded data input terminals Signal processing circuitry for a bar-coded data input terminal having a bar-code reading device, such as light pen, for reading bar-coded identity data, from bar-coded identity labels, attached to items to be identified for instance takes an output signa... | 04/08/1980 |
| 4191569 | Treating developed lithoplate with oleophilic composition A positive working radiation sensitive plate is image-wise exposed, developed and desensitized, and dried. Thereafter an oleophilic composition including a solvent capable of softening the image is applied to the plate and the plate is then washed to remo... | 03/04/1980 |
| 4188880 | Blank for conversion into a perforated stencil by spark erosion A blank and method for using the same wherein the blank for conversion to a stencil by spark erosion through a stencil layer to a conductive face is arranged so that the layer and face do not have to be peeled apart and chemical and physical interaction b... | 02/19/1980 |
| 4177887 | Reverse self-locking device A drive transmitting device is disclosed which may be preset and will subsequently become locked if sudden or gradual rotation forces are applied, the device comprising a first member at least part of which is inside a second member, a rotation of one of ... | 12/11/1979 |
| 4172772 | Printing plates Aluminium or aluminium alloy is electrolytically grained using alternating current and an aqueous electrolyte comprising specified amounts of hydrochloric acid and a monocarboxylic acid containing from 1 to 4 carbon atoms, preferably acetic acid. The grai... | 10/30/1979 |
| 4127930 | Coating with antifriction metal The invention provides a method of, and apparatus for, producing a layer of antifriction metal on a metallic surface. The method involves using a die having a recess surrounded by a thin rim; the recess is filled with molten antifriction metal which is al... | 12/05/1978 |
| 4126468 | Radiation sensitive compositions of quaternary ammonium salt and carboxylic acid sensitizer A radiation sensitive composition comprises a quaternary ammonium salt and a chemical sensitiser of the formula ##STR1## wherein R21 is aryl, arylakenyl or arylalkyl, R22 is aryl, alkyl, arylalkenyl, arylalkyl, carboxylic acid o... | 11/21/1978 |
