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N74-34857*

National Aeronautics and Space Administration. Langley Research Center, Langley Station, Va. FAST SCAN CONTROL FOR DEFLECTION TYPE MASS SPECTROMETERS Patent

Paul R. Yeager, Gianni Gaetano, and David B. Hughes, inventors (to NASA) (Bell and Howell Co., Pasadena, Calif.) Issued 10 Sep. 1974 7 p Filed 4 May 1973 Continuation-in-part of abandoned US Patent Appl. SN-188836, filed 31 Oct. 1971 (NASA-Case-LAR-11428-1; US-Patent-3,835,318; US-Patent-Appl-SN-357126; US-Patent-Class-250-281; US-Patent-Class-250-295; US-Patent-Appl-SN-188836) Avail: US Patent Office CSCL 148

A high speed scan device is reported that allows most any scanning sector mass spectrometer to measure preselected gases at a very high sampling rate. The device generates a rapidly changing staircase output which is applied to the accelerator of the spectrometer and it also generates defocusing pulses that are applied to one of the deflecting plates of the spectrometer which when shorted to ground deflects the ion beam away from the collector. A defocusing pulse occurs each time there is a change in the staircase output.

Official Gazette of the U.S. Patent Office

N75-12271* National Aeronautics and Space Administration. Marshall Space Flight Center, Huntsville, Ala.

ULTRASONIC BONE DENSITOMETER Patent

James M. Hoop, inventor (to NASA) Issued 12 Nov. 1974 7 p Filed 8 Aug. 1973

(NASA-Case-MFS-20994-1; US-Patent-3,847,141; US-Patent-Appl-SN-386789; US-Patent-Class-128-2V; US-Patent-Class-73-67.1) Avail: US Patent Office CSCL 06B A device, for measuring the density of a bone structure so as to monitor the calcium content, is described. A pair of opposed spaced ultrasonic transducers are held within a clamping apparatus closely adjacent the bone being analyzed. These ultrasonic transducers incude piezoelectric crystals shaped to direct signals through the bone encompassed in the heel and finger of the subject being tested. A pulse generator is coupled to one of the transducers and generates an electric pulse for causing the transducers to generate an ultrasonic sound wave which is directed through the bone structure to the other transducer. An electric circuit, including an amplifier and a bandpass filter couples the signals from the receiver transducer back to the pulse generator for retriggering the pulse generator at a frequency proportional to the duration that the ultrasonic wave takes to travel through the bone structure being examined. Official Gazette of the U.S. Patent Office

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An automatic apparatus is described for microbiologically sampling surface using a cotton swab which eliminates human error. The apparatus includes a self-powered transport device, such as a motor-driven wheeled cart, which mounts a swabbing motor drive for a crank arm which supports a swab in the free and thereof. The swabbing motor is pivotably mounted and an actuator rod movable responsive to the cart traveling a predetermined distance provides lifting of the swab from the surface being sampled and reversal of the direction of travel of the cart. Official Gazette of the U.S. Patent Office

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(NASA-Case-MFS-20506-1; US-Patent-3,842,509;
US-Patent-Appl-SN-328792; US-Patent-Class-33-180R;
US-Patent-Class-33-DIG.13; US-Patent-Class-350-292) Avail:
US Patent Office CSCL 148

A system is described to measure alignment between interfacing edges of mirror segments positioned to form a segmented mirror surface. It serves as a gauge having a bending beam with four piezoresistive elements coupled across the interfaces of the edges of adjacent mirror segments. The bending beam has a first position corresponding to alignment of the edges of adjacent mirror segments, and it is bendable from the first position in a direction and to a degree dependent upon the relative misalignment between the edges of adjacent mirror segments to correspondingly vary the resistance of the strain guage. A source of power and an amplifier are connected in circuit with the strain gauge whereby the output of the amplifier varies according to the misalignment of the edges of adjacent mirror segments. Official Gazette of the U.S. Patent Office

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A magnetometer which uses a single crystal of bismuth selenide is described. The rhombohedral crystal structure of the sensing element is analyzed. The method of construction of the magnetometer is discussed. It is stated that the sensing crystal has a positive or negative Hall coefficient and a carrier concentration of about 10 to the 18th power to 10 to the 20th power per cubic centimeter. Official Gazette of the U.S. Patent Office

N76-15014 National Aeronautics and Space Administration.
Langley Research Center, Langley Station, Va.
AUTOMATIC FOCUS CONTROL FOR FACSIMILE CAMERAS
Patent

Archibald R. Sinclair, Ernest E. Burcher, and Stephen J. Katzberg, inventors (to NASA) Issued 24 Dec. 1974 6 p Filed 15 Oct. 1973

(NASA-Case-LAR-11213-1; US-Patent-3,857,031; US-Patent-Appl-SN-406715; US-Patent-Class-250-201; US-Patent-Class-356-4) Avail: US Patent Office CSCL 14E An electronic circuit for controlling the focus of facsimile cameras is described. The circuit consists of balanced a.c. amplifiers, two square law function generators, and a differential amplifier and power drive. The invention includes a method for maintaining the imaging sensor at the expected location of the focal plane as the facsimile camera scans a scene or terrain. A block diagram of the electronic circuitry is provided. P.N.F.

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(NASA-Case-MFS-21761-1; US-Patent-3,859,845;
US-Patent-Appl-SN-337816; US-Patent-Class-73-49.2;
US-Patent-Class-73-40; US-Patent-Class-200-83N) Avail: US
Patent Office CSCL 14B

A detector for sensing a leaking of fluid pressures is reported. The detector is characterized by an hermetically sealed housing confining therewithin a first normalized pressure, a connector for coupling the housing in direct communication with a suspected leak established within a substantially sealed body. an electrical circuit having a first or normalized configuration and including a pair of circuit completing electrical contacts and means mounting at least one contact of said pair of contacts on a flexible wall of the housing supporting the contact for movement from a first position along a linear path to a second position in response to an altering of the pressure confined within the housing for thereby altering the configuration of the circuit. Official Gazette of the U.S. Patent Office

28

14B

N75-15932 National Aeronautics and Space Administration. Marshall Space Flight Center, Huntsville, Ala.

ERGOMETER CALIBRATOR Patent

Raymond L. Gause, inventor (to NASA) Issued 14 Jan. 1975 5 p Filed 31 Oct. 1973

(NASA-Case-MFS-21045-1; US-Patent-3,859,840; US-Patent-Appl-SN-411572; US-Patent-Class-73-1R; US-Patent-Class-73-379) Avail: US Patent Office CSCL 148 An apparatus is presented for accurately calibrating ergometers so that the work rate produced by the particular ergometer being calibrated is accurate. The apparatus includes a de motor which is coupled directly to the ergometer for rotating it at various speeds. Positioned on the shaft between the dc motor and the ergometer is a torque sensor and tachometer, which feed signals to a power computer for subsequent recording. A speed controller is utilized with the dc motor.

Official Gazette of the U.S. Patent Office

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N75-19611 National Aeronautics and Space Administration.
Langley Research Center, Langley Station, Va.
AUTOMATIC LIQUID INVENTORY COLLECTING AND
DISPENSING UNIT Patent

John B. Hall, Jr. and Edwin F. Williams, inventors (to NASA)
Issued 4 Feb. 1975 6 p Filed 21 Feb. 1973

(NASA-Case-LAR-11071-1; US-Patent-3,864,060;
US-Patent-Appl-SN-334349: US-Patent-Class-417-36;
US-Patent-Class-73-221; US-Patent-Class-417-138;
US-Patent-Class-417-395) Avail: US Patent Office CSCL

14B

A means is provided for automatically collecting waste liquids and for simultaneously feeding these liquids into water recovery processes. The invention includes first and second tanks with first and second two-way solenoid valves associated with each of the tanks. The first solenoid valve is connected to the liquid source and its associated tank so as to allow liquid to flow into the tank when the valve is in its normal position and to allow the liquid to flow out of the tank when the valve is in its actuated position. The second valve is connected to its associated tank and a gas supply so as to allow gas inside the tank to flow out when the valve is in its normal position and to allow gas to flow from the gas supply into the tank when the valve is in its actuated position. Control circuits are included for actuating the two valves associated with the first tank and not actuating the valves associated with the second tank. The first tank is filled and the second tank is emptied.

Official Gazette of the U.S. Patent Office

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N75-16783 National Aeronautics and Space Administration. Ames Research Center, Moffett Field, Calif.

DUAL WAVELENGTH SCANNING DOPPLER VELOCIMETER Patent

Kenneth L. Rloff, George R. Grant, and William D. Gunter, Jr., inventors (to NASA) Issued 14 Jan. 1975 8 p Filed 18 Apr. 1973

(NASA-Case-ARC-10637-1; US-Patent-3,860,342; US-Patent-Appl-SN-352383; US-Patent-Class-356-28) Avail: US Patent Office CSCL 14B

A laser Doppler velocimeter is described simultaneously measuring localized orthogonal velocity components in a fluid stream without perturbation of the flowfield. A first pair of beams of a first common wavelength and a second pair of beams of a second common wavelength are derived from a single laser source, directed along a single optical axis. The respective beams of each pair of beams are disposed parallel to the axis, symmetrically about the axis, and are positioned orthogonally about the axis relative to each other. The four beams are then focused upon a selected test volume within the flowfield. Light scattered at that point is collected by an appropriate optical system and focused onto photodetectors which develop electrical output signals commensurate with the orthogonal velocity components at the test point. Official Gazette of the U.S. Patent Office

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(NASA-Case-LAR-11237-1; US-Patent-3,864,960;
US-Patent-Appl-SN-402868; US-Patent-Class-73-46;
US-Patent-Class-73-49.2; US-Patent-Class-340-242) Avail: US
Patent Office CSCL 14B

A leak detector for use with high vacuum seals as used in feedthroughs and hatch covers for manned spacecraft and vacuum systems is described. Two thermistors are used, one exposed directly to vacuum and the other exposed to a secondary chamber formed by the seal being monitored and a second auxiliary seal. Leakage into the secondary chamber causes an unbalance of an

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N75-19613* National Aeronautics and Space Administration. Langley Research Center, Langley Station, Va.

SPECTROMETER INTEGRATED WITH A FACSIMILE CAMERA Patent

Ernest E. Burcher, Daniel J. Jobson, Stephen J. Katzberg, and William L. Kelly, IV, inventors (to NASA) Issued 4 Mar. 1975 5 p Filed 2 Aug. 1973

(NASA-Case-LAR-11207-1; US-Patent-3,869,212;
US-Patent-Appl-SN-385013; US-Patent-Class-356-189;
US-Patent-Class-178-DIG.20; US-Patent-Class-250-332;
US-Patent-Class-356-96; US-Patent-Class-356-186;
US-Patent-Class-356-83) Avail: US Patent Office

CSCL 14B

This invention integrates a spectrometer capability with the basic imagery function of facsimile cameras without significantly increasing mechanical or optical complexity, or interfering with the imaging function. The invention consists of a group of photodetectors arranged in a linear array in the focal plane of the facsimile camera with a separate narrow band interference filter centered over each photodetector. The interference filter photodetector array is on a line in the focal plane of the facsimile camera along the direction of image motion due to the rotation of the facsimile camera's vertical mirror. As the image of the picture element of interest travels down the interference filter photodetector array, the photodetector outputs are synchronously selected and sampled to provide spectral information on the single picture element. Official Gazzette of the U.S. Patent Office

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A jet aircraft noise and sonic boom measuring device which converts sound pressure into electric current is described. An electric current proportional to the sound pressure level at a condenser microphone is produced and transmitted over a cable, amplified by a zero drive amplifier and recorded on magnetic tape. The converter is comprised of a local oscillator, a dual-gate field-effect transistor (FET) mixer and a voltage regulator/ impedance translator. A carrier voltage that is applied to one of the gates of the FET mixer is generated by the local oscillator. The microphone signal is mixed with the carrier to produce an electrical current at the frequency of vibration of the microphone diaphragm by the FET mixer. The voltage of the local oscillator and mixer stages is regulated, the carrier at the output is eliminated, and a low output impedance at the cable terminals is provided by the voltage regulator /impedance translator. Official Gazette of the U.S. Patent Office

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A meter for detecting tension in elastic bodies, especially in fabric straps employed as tie down straps for stowed objects is presented. The meter is characterized by a pair of elongated arms coupled together for pivotal motion about a common axis in a common plane and a strap receiver located at adjacent ends of the arms for receiving and securing adjacent portions of the strap. The receivers are supported by the arms for motion along intersecting arcs, and motion detection means is located at the opposite ends of the arms for detecting the magnitude of the motion imparted to the receivers as the strap is placed in tension. Official Gazette of the U.S. Patent Office

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N75-19616* National Aeronautics and Space Administration. Marshall Space Flight Center, Huntsville, Ala.

MULTIPLATE FOCUSING COLLIMATOR Patent

Richard B. Hoover and James H. Underwood, inventors (to NASA) Issued 4 Mar. 1975 5 p Filed 28 Jun. 1973

(NASA-Case-MFS-20932-1; US-Patent-3,869,615;
US-Patent-Appl-SN-374441; US-Patent-Class-250-508;
US-Patent-Class-250-510; US-Patent-Class-250-505) Avail: US
Patent Office CSCL 14B

An appartus is described for scanning relatively small near sources of penetrating radiation to obtain the energy distribution thereof, wherein a collimator assembly is interposed between a radiation source and a radiation detector. The collimator assembly has a plurality of plates aligned in parallel planes with respect to a common axis normal to their centers. All the plates have similar random distribution of apertures. All apertures on each plate are the same size. The size of respective plates, the size of the apertures of said respective plates, and the spacing between said respective plates vary precisely according to a predetermined ratio to produce radiation channels which converge to a focal point. The radiation incident to the radiation detector is maximized when the focal point and the radiation source are co-incident.

Official Gazette of the U.S. Patent Office

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N75-19628*# National Aeronautics and Space Administration. Pasadena Office, Calif.

PARTICLE SIZE SPECTROMETER AND REFRACTOMETER Patent Application

Alain L. Fymat, inventor (to NASA) (JPL) Filed 26 Feb. 1975 44 P

(Contract NAS7-100)

(NASA-Case-NPO-13614-1; US-Patent-Appl-SN-553209) Avail: NTIS HC $3.75 CSCL 148

An apparatus and method are described for simultaneously and separately reconstructing the effective spectrum of sizes and refractive indices of scattering particulates of unknown chemical composition embedded in a medium such as a liquid or gas (of any arbitrary number of species). A photometer is used which has a specified narrow field of view along near-forward scattering angles variable between approximately + or - 10 degrees, preferably + or - 7.5 degrees, and an angular resolution of approximately 15 min of arc, or less. It operates at two separate wavelengths. one of which is approximately equal to 0.7 microns, or larger, but less than or equal to the expected minimum particle radius, and the other has a substantially different value from the first by an amount of at least approximately 0.2 to 0.3 microns.

NASA

N75-19627*# National Aeronautics and Space Administration. Pasadena Office, Calif.

FREQUENCY SCANNING PARTICLE SIZE SPECTROMETER Patent Application

Alain L. Fymat, inventor (to NASA) (JPL) Filed 26 Feb. 1975 21 P

(Contract NAS7-100)

(NASA-Case-NPO-13606-1; US-Patent-Appl-SN-553210) Avail: NTIS HC $3.25 CSCL 14B

A method and apparatus for determining the distribution of particle sizes of a scattering medium of unknown chemical composition is reported. The apparatus, a particle size spectrometer, has a fixed field of view within the forward light scattering cone at an angle between approximately 100 and 200 minutes of arc, a spectral range extending approximately from 0.2 to 4.0 inverse micrometers and a spectral resolution between about 0.1 and 0.2 micrometers. The apparatus is employed to determine the distribution of particle sizes, independently of the chemical

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