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 |
| 4544266 | Apparatus and a method for testing the authenticity of documents In an apparatus and a method for examining the authenticity of a document, which includes at least a machine-readable authenticity feature in the form of an optical microstructure for diffracting at least one component of a beam of light rays which has a ... | 10/01/1985 |
| 4544815 | Multiple key switch A multipole key switch comprises switching chambers disposed next to each other are each provided with a movable contact bridge, which shortens a pair of contact fingers in each case in the turned on condition. Contact supports for supporting the contact ... | 10/01/1985 |
| 4543029 | Device for cutting flexible containers containing fungible material Apparatus for cutting of bags containing tricklable materials, as well as for separating the goods from bag parts, with a sieve drum and separate outlets for the bag parts, oversized particles, and the goods to be discharged, comprising a bag guidance wit... | 09/24/1985 |
| 4539787 | Reinforcement mat for reinforced concrete A reinforcement mat for reinforced concrete consists of longitudinal wires and crosswires which are welded together at their points of cross. End portions of the crosswires project out beyond the edge longitudinal wires and are bent back in the plane of t... | 09/10/1985 |
| 4537504 | Security blank with enhanced authenticating features, and a method and an apparatus for determining the genuineness of the security blank A security blank is formed with a light-redirecting spatial structure including a deterministic component establishing at least one authenticating feature, and a stochastic component superimposed on the deterministic component, and sufficiently obscuring ... | 08/27/1985 |
| 4532444 | Rotational restriction lock for the rotor of a synchronous motor A rotational restriction lock is formed as a one-piece restricting element which is resiliently mounted on a rotor shaft and has a hub which is always resiliently driven in rotation by the rotor throughout a small angle, spring arms which transmit the rot... | 07/30/1985 |
| 4529858 | Multispot grid-welding machine A multispot grid-welding machine has an electrode-carrier beam movable up and down and a plurality of guide rods mounting a plurality of electrode units for movement on the beam. Pressure springs bias the electrode units in a direction towards the grid be... | 07/16/1985 |
| 4525987 | Agricultural machine An agricultural machine to be pulled by a tractor and having working tools driven by outer driving sources comprises a chassis arranged to support the working tools, a beam unit arranged for connecting the chassis with a tractor and including a first beam... | 07/02/1985 |
| 4526253 | Brake for rollable receiving elements utilized particularly in airplanes A braking arrangement adapted for use in connection with a rollable cart employed in commercial airplanes includes a longitudinal base plate, which has relatively narrow end portions of a predetermined width, and two roller pairs mounted on the base plate... | 07/02/1985 |
| 4526025 | Wire or strip bending mechanism A bending mechanism for wire or strip material is provided, which is intended in particular for bending back towards the edge longitudinal wires the projecting end portions of crosswires of reinforcement grids for reinforced concrete construction. The mec... | 07/02/1985 |
| 4525668 | System for measuring electrical output or energy In an apparatus for the measurement of electrical power, including a multiplier which receives on an input thereof an electrical signal proportional to the voltage component of the electrical power, and which is subjected to an external magnetic field pro... | 06/25/1985 |
| 4519194 | Hay harvesting machine A hay harvesting machine for windrowing hay, moving swaths of hay, tedding hay and the like includes at least one drum which has a base and a wall, and is rotatable about an axis which is inclined within a predetermined range to the vertical, a flexible s... | 05/28/1985 |
| 4520311 | Current to pulse-sequence transducer A current to pulse-sequence transducer for transforming a current to be measured into a sequence of pulses which has a certain mark-to-space ratio, includes a first transforming device for transforming the current to be measured into a measurement magneti... | 05/28/1985 |
| 4516490 | Press drainage A press for extracting fluid from fluid-containing matter so as to separate the fluid from the remaining matter, particularly for dejuicing of agricultural products, primarily fruit, includes a rotatably supported container, and at least one flexible memb... | 05/14/1985 |
| 4517682 | Method and an apparatus for synchronizing received binary signals In an apparatus for synchronizing received binary signals, the duration of each bit of the received signals to be synchronized is an integral multiple n of the duration of an original bit, and each original bit has a reception quality factor which is stor... | 05/14/1985 |
| 4516579 | Interference recognition circuit in a heart pacemaker A synchronizable heart pacemaker includes a timing circuit, a differentiating circuit for receiving signals, and an interference recognition circuit connected to the output of the differentiating circuit. The interference recognition circuit includes a te... | 05/14/1985 |
| 4513273 | Transducer for current measurement A transducer for measurement of a current includes a magnetic core, a single U-shaped flat conductor which has two wings, and a crown joining the wings. Each wing has two openings, and the magnetic core passes through the openings. The two wings constitut... | 04/23/1985 |
| 4513387 | Method and an apparatus for generating periodic digital time function signals A method and an apparatus for obtaining digital periodic time function signals, and wherein each time function signal is defined by an instantaneous frequency varying in dependence of time within a characteristic period T equal to the period of a first cl... | 04/23/1985 |
| 4513274 | Current transformer for measuring instruments The current transformer for instruments for measuring electric currents includes a magnetic core that has two cores and an inductive current divider with three parallel current paths. The current dividers form, together with cores, two current transformer... | 04/23/1985 |
| 4509180 | Method and an apparatus for correcting distortion of binary received signals In a method of correcting a signal having a sequence of binary bits modulated on a carrier and followed by demodulation of the signal, and wherein a distortion has been impressed on the signal during passage through a transmission channel, the steps inclu... | 04/02/1985 |
| 4506818 | Device for the purpose of pushing sections of a wire through a solid body consisting of yielding material In order to be able to remove the wire from its supply source and in order to be able to prevent a bending of the wire, a wire-feed-clamp (3) can be moved along an alignment element (2) which, in a fixed position, is arranged on a carrier (1), whereby the... | 03/26/1985 |
| 4506372 | Method and apparatus for recognizing in a receiver the start of a telegram signal consisting of a bit impulse sequence In an apparatus and a method for recognizing the start of a noise-corrupted received telegram signal, and wherein the telegram signal consists of an information-containing sequence of bits ahead of the telegram signal, thereafter transmitting an intermedi... | 03/19/1985 |
| 4503650 | Grid mat A grid mat consists of longitudinal (L) and transverse (Q) wires welded to one another, in which at least some transverse wires project beyond the longitudinal edge wires and are bent back to these in the form of loops (S). For the purpose of space-saving... | 03/12/1985 |
| 4504705 | Receiving arrangements for audio frequency signals A receiving arrangement is provided, to receive audio frequency signals that are transmitted by way of lines of an alternating current distribution network. The audio frequency signals are decoupled from a low or medium voltage level of the network. The c... | 03/12/1985 |
| 4501439 | Document having a security feature and method of determining the authenticity of the document In a security blank which includes a substrate which has two major surfaces, a thermoplastic layer which has a predetermined refraction index and is suitable for embossing thereon a machine-readable authenticity feature in the form of an optical microstru... | 02/26/1985 |
| 4501579 | Cigarette filter units The invention concerns a method for producing a cigarette filter unit, in which filter elements are disposed on a porous or perforated covering strip and at least partially wrapped thereby and adhesively joined. The adhesive substance is applied to the co... | 02/26/1985 |
| 4500763 | Method and apparatus for the production of welded grid bodies Grid bodies which consist of two parallel plane grid mats of longitudinal and transverse wires crossing one another and welded together at the points of cross, and of spacer wires, which hold the mats spaced apart and which are welded at each end to one w... | 02/19/1985 |
| 4499346 | Snap action miniature switch Two identical toggle springs of a snap action switch are inserted in the same knife-edged bearings and are spaced apart in the region of their clamping locations and are activated by the same plunger. There are two control arms connected to the toggle spr... | 02/12/1985 |
| 4496107 | Machine for removing blocks of forage from a silo A machine for removing blocks of forage from inside a horizontal silo has a chassis with prongs fitted on a lower part of the chassis and extending substantially horizontally, an arm located at a certain distance above the prongs and bearing a cutting dev... | 01/29/1985 |
| 4496820 | Multispot electrical resistance welding machine In a multispot resistance welding machine, the electrodes (8,9) of which are fed with D.C. pulses from a rectifier unit (2) via two busbars (5,7) running across the welding machine, the busbars (5,7) are arranged on opposite sides of the plane of weld and... | 01/29/1985 |
| 4493962 | Apparatus and method to suppress oxidation during resistance welding In an apparatus and a method of at least partially suppressing oxidation of can components or the like during resistance roller welding with the aid of an inert gas, the steps include welding the can components to one another, so as to obtain a hot weldin... | 01/15/1985 |
| 4493012 | Combined fixture and shade for tubular fluorescent lamps The fixture and shade, build together, for a tubular fluorescent lamp (20) comprises a shade provided with longitudinally extending limitation walls (10, 26) which on their inner-sides in cross sections follow a smooth concave curve. Within the shade tran... | 01/08/1985 |
| 4490103 | Press with easily exchangeable proof plates In a press operable for movements of proof plate exchangeably mounted on an end of a press die into and out of a mold, and wherein the proof plate normally does not exceed a position wherein its topmost portion is at most flush with a topmost portion of t... | 12/25/1984 |
| 4480486 | Apparatus for measuring liquid flow In a housing two ultrasonic measuring transducers are arranged opposite of the two end faces of a test tube. The test tube providing a measuring section penetrates a separating wall and interconnects two distribution chambers of the housing. The fluid to ... | 11/06/1984 |
| 4475451 | Mechanism for releasably securing a drainage element to a press In a mechanism for releasably securing a longitudinal and flexible drainage element to a press-plate of a press which has a press-space for squeezing juice from fruits, and wherein the press-plate defines a passage, a securing device which includes a coll... | 10/09/1984 |
| 4473292 | Dampening system In a dampening arrangement for oscillations occurring in rapidly stepwise displacements of a cross slide system of a circuit printing machine, the moving part is with one portion thereof immersed in a viscous dampening liquid within a cavity. Between the ... | 09/25/1984 |
| 4472074 | Cartridge for dye-impregnated endless ribbon A cartridge for a dye-impregnated endless ribbon includes a transport device disposed within the cartridge; the transport device includes a driving member having a surface, and a stationary member having another surface so that the surfaces define a passa... | 09/18/1984 |
| 4470637 | Vehicle wheel with segmental rim parts and retaining ring A vehicle wheel, of the type that carries a tubed tire includes a wheel body, a rim which has a plurality of segmental rim parts, a solid retaining ring which engages all of the rim parts along one side thereof, cam and cam follower means between the rim ... | 09/11/1984 |
| 4469439 | Process and apparatus for plotting the oxygen equilibrium curves of blood or hemoglobin solutions For plotting an equilibrium curve representative of the relation between the oxygen saturation value of a hemoglobin sample, such as blood, and a changing oxygen partial pressure level in a gas, the sample is initially oxygenated by an oxygen-containing g... | 09/04/1984 |
| 4468550 | Multispotwelding machine for the production of grids or gratings This multispotwelding machine serving for the production of grids or gratings has a welding electrode system (50, 51, 52) suitable for double spotwelding in the direction of the longitudinal members (L) and having two lines of weld (S1, S2), two crosswire... | 08/28/1984 |
