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| Number | Title | Issue Date |
| 4280354 | Acoustic method and apparatus for measuring surfaces of wafers and similar articles A measurement system wherein an acoustic distance measuring transducer is moved over a flat reference surface, measuring the distance from the transducer to a calibration surface and then to a test surface. The transducer is moved along a path within a ri... | 07/28/1981 |
| 4280355 | Fuze data quantizing system The present invention discloses an in-flight testing of projectile and mor fuzes. A microminiature electronic circuitry in a cartridge form is designed to attach to any of the large caliber shell or mortar fuzes. The test-cartridge is a recoverable, reus... | 07/28/1981 |
| 4280356 | Pipeline leak detection The present invention pertains to a process for detecting leaks in a pipeline when the flow is in a transient or steady condition. A mathematical model of the pipeline is constructed and real pressures and real flows are compared at various locations in t... | 07/28/1981 |
| 4280357 | Inspection of electrically non-conductive workpieces A method of inspecting wax patterns for use in the lost wax casting process comprises coating the pattern with aluminum by vapor diffusion and subsequently inspecting the coated pattern using inspection apparatus adapted for the non-contacting dimensional... | 07/28/1981 |
| 4280358 | Monitoring the operation of an internal combustion engine A monitoring device for monitoring the operation of a vehicle internal combustion engine having inlet ducting for admitting a fuel/air mixture into the engine comprises vacuum sensitive apparatus for sensing the degree of vacuum in the inlet ducting, spee... | 07/28/1981 |
| 4280359 | Rotary cam drive for impact tool A hammer drill has a housing provided with a tool chuck in which a tool is to be mounted. A drive is provided which is capable of rotating and/or axially impacting the tool chuck. This drive includes a piston reciprocable in axial direction of the tool ch... | 07/28/1981 |
| 4280360 | Fluid measuring device A fluid measuring device comprises flow meter for measuring quantities of flow or flow rates of fluid and flow rectifiers arranged upstream and downstream of the flow meter, whose rectifier elements or cells are sized and positioned such that a ratio W | 07/28/1981 |
| 4280361 | Device for detecting the defrosting of frozen products A process for detecting and signaling the defrosting, even temporary, of frozen products which consist in providing a detecting device consisting of a closed container having therein a colorless and a colored element which, under frozen conditions, are se... | 07/28/1981 |
| 4280362 | Peak reading bottom hole pressure instrument A simplified downhole pressure reading instrument. It has a cylindrical body which holds a charge of gas at one end. There is a concentric cylindrical element which slides longitudinally inside the body with a low friction seal between them. The body has ... | 07/28/1981 |
| 4280363 | System for measurement of force with directionally orientated strain gauges A measuring shaft intended to be fixed in a hole is equipped with strain gauges or similar devices for sensing a load. The inner end of the measuring shaft is threaded to engage with threads provided in the bottom of the hole, and the outer end of the mea... | 07/28/1981 |
| 4280364 | Device for and method of measuring glazing rabbet loads Force applied to marginal edge portions of a panel by opposed walls of a groove of curtain wall system is measured by mounting a pair of spaced blocks in the groove. Moveable jaw members are mounted in space between the blocks and moved apart into engagem... | 07/28/1981 |
| 4280365 | Ultrasonic Doppler flowmeter with correction for vibratory signals at zero-flow conditions An ultrasonic Doppler flowmeter for measuring flowing fluid by reflection of sonic waves from particles in the fluid is provided with a discriminating circuit including a comparator amplifier connected to the received signal that produces a zero-flow outp... | 07/28/1981 |
| 4280366 | Gas driven gyroscope A gas driven and gas lubricated gyroscope, especially for low pressure and vacuum operation, comprising a spherical rotor and spherical bearing formed by two bearing half parts joined along mating equatorial plane surfaces, at least one of the bearing hal... | 07/28/1981 |
| 4280367 | Gearless quadrophasor A link and pivot mechanism is provided in which a pair of equal length links are connected pivotally at centers. The movement of these two links is scissor-like and is precisely controlled by the complete mechanism to produce four cycles per revolution. I... | 07/28/1981 |
| 4280368 | Devices for producing vibratory forces The device for producing vibratory forces shown in the drawings comprises a pair of plates mounted on a structural frame. There are three rows of gears on each plate which are intermeshed so that all may be driven from a drive input to one of the gears in... | 07/28/1981 |
| 4280369 | Ball/ramp system for torque transmission A ball/ramp force producing system is provided for use in infinitely variable ratio torque transmissions of the type which transmit torque by means of rolling friction contact between pairs of traction surfaces. The ball/ramp system applies a thrust force... | 07/28/1981 |
| 4280370 | Clutch assembly for gear-type transmission system A sliding gear keyed or splined to a main shaft has external teeth selectively engageable with either of two driving gears on a pair of continuously rotating countershafts and in its neutral position is releasably coupled by one or more ball checks to a s... | 07/28/1981 |
| 4280371 | Control lever assembly Control lever assembly for cable operated apparatus in which ends of cable cores are connected to lever with simple structure eliminating clevis and locked pin to provide compact, easy-to-service anchors. Independently adjustable drag or friction device r... | 07/28/1981 |
| 4280372 | Steering wheel assembly A steering wheel assembly having an energy absorbing sleeve 13 supported on a hub 12 and a steering wheel 14 supported on the sleeve. The energy absorbing sleeve has a plurality of concentric, substantially rectangular rings 19 formed in stepped relations... | 07/28/1981 |
| 4280373 | Portable drive unit for valve actuator A portable drive unit for a valve actuator includes a portable two-cycle or four-cycle gasoline engine and a gear reducer. The gasoline engine is bolted, through vibration damper means, to the housing or gear box of the gear reducer. The gear box is clamp... | 07/28/1981 |
| 4280376 | Planetary gear system and gears therefore A single-stage high-ratio compound planetary gear system has gears configured for optimal tooth profile contact to minimize Hertzian stresses under relatively high contact loads characteristic of high-ratio gearing. Criteria is established for determining... | 07/28/1981 |
| 4280377 | Indexing device An indexing device for use with a machine tool comprises a housing supporting a rotatable face plate. The face plate is connected to be driven by a drive unit which includes a motor. The drive unit can be detached from the housing and replaced the other w... | 07/28/1981 |
| 4280379 | Reversihble ratchet drive In a ratchet tool having a toothed driving, a complementary coaxial, generally cylindrical rotatable toothed core within the ring, and a core-carried pivotal toothed double-ended pawl secured within the core and selectively positionable to intercouple the... | 07/28/1981 |
| 4280380 | Tension control of fasteners There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a p... | 07/28/1981 |
| 4280381 | Film tray assembly for photographic film cutter Cut lengths or segments of photographic strip material, particularly photographic film, are stacked as they are discharged from a photographic film cutter. The device for stacking the cut lengths includes a tray, an arm, a base, and a guide. The base is c... | 07/28/1981 |
| 4280382 | Saw arrangement having plural operator stations A trimming saw arrangement comprises a root-cutting station, a trimming station, and a feed line for advancing timber, perpendicular to its longitudinal direction, through the stations and to a sorting station having a sorting conveyor. The stations inclu... | 07/28/1981 |
| 4280383 | Textile cot remover A tool for cutting a textile cot from an associated mandrel is provided wherein such tool is particularly adapted to be attached to one of a cooperating pair of machine components which are relatively movable toward and away from each other and a mandrel ... | 07/28/1981 |
| 4280384 | Apparatus for cutting strips of material of varying lengths A selected length of a strip of material is intermittently fed past a cutting position having cutting means. The cutting means is activated only after a selected number greater than one of the selected lengths of the strip of material has been intermitten... | 07/28/1981 |
| 4280385 | Apparatus for cutting foodstuffs or the like Apparatus for slicing and/or dicing bacon has an elongated U-shaped trough of stainless steel which receives pieces of bacon and wherein a pusher advances the material to be comminuted forwardly into the range of one or more knives. The trough is removabl... | 07/28/1981 |
| 4280386 | Paperboard slitting apparatus Rotary slitting apparatus for slitting paperboard material including a pair of coacting knife holders for mounting on parallel adjacent rotatable shafts, such holders having thin flexible annular slitting blades clamped thereon at a slight angle to a plan... | 07/28/1981 |
| 4280387 | Frequency following circuit A plurality of a signal peak detection circuits connected in cascade for operation on a complex waveform input signal, for generating a reference signal having peaks occurring in time with the peaks of the fundamental frequency component of the input sign... | 07/28/1981 |
| 4280388 | Apparatus and method for generating chorus and celeste tones The operation of the chorus generator of FIG. 3 may be summarized as follows. The generation of a realistic chorus tone depends upon the simultaneous amplitude and phase modulation of a tone signal which initially has little or no choral characteristics. ... | 07/28/1981 |
| 4280389 | Piano soundboard A bass bridge for a piano is provided wherein a runner is fixed to the soundboard, an apron is fixed to the runner and is cantilevered therefrom along one edge, and a bridge cap is fixed to the other edge. The runner and apron have a plurality of slots ex... | 07/28/1981 |
| 4280390 | Sealing element A sealing element is characterized by an upset metal disc having a central opening and reversely positioned annular grooves, and an annular sealing member in each groove. The sealing element as a sealing washer provides for effective sealing engagement wi... | 07/28/1981 |
| 4280391 | Arrangement for anchoring a mounting element in a support structure and mounting an object on the same An arrangement for mounting an object to a support structure has a mounting element insertable into a mounting hole of the support structure, a flexible container arranged to accommodate an adhesive substance and to be inserted into the mounting hole prio... | 07/28/1981 |
| 4280392 | Cartridge feed apparatus for an automatic firing weapon A cartridge feed apparatus for two cartridge belts is structured such that the cartridges are infed relatively closely to the lengthwise axis of the weapon barrel, and there can be employed a spring sleeve which is shorter than the stroke of the breechblo... | 07/28/1981 |
| 4280393 | Light weight armored vehicle An armored vehicle comprising a motor, roller members and a transmission for transmitting drive from the motor to the roller members. The vehicle comprises a body including a highly armored main central cell surrounding the personnel and essential mechani... | 07/28/1981 |
| 4280394 | Marine firing weapon A marine or naval firing weapon which is particularly suitable for fighting targets in zenith and additionally is capable of taking into account the movements of the vessel during aiming. The firing weapon comprises a first alignment axis which does not e... | 07/28/1981 |
| 4280395 | Hydraulic brake booster The booster is installed downstream of a vehicle's power steering gear. The booster has a power piston and a valve seat piston reciprocably mounted in a bore of the booster housing. Hydraulic inlet pressure is introduced into the housing bore between thes... | 07/28/1981 |
| 4280396 | Hydraulic oscillator A hydraulic oscillator in which a piston reciprocates between first and second positions in a cylinder. A reversing pilot valve controls fluid flow to ends of the cylinder and flow through first and second pilot passages control the reversing operation of... | 07/28/1981 |
