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Analysis

1 / 244,204
1.670943Improvements in and relating to means for measuring the resistance of alternating current apparatus
GB - 30.04.1952
Int.Class G01R 27/02
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
27Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
 Appl.No 1756350 Applicant BRITISH THOMSON HOUSTON CO LTD Inventor
670,943. Bridge circuits. BRITISH THOMSON-HOUSTON CO., Ltd. July 13, 1950 [July 26, 1949], No. 17563/50. Class 37. A Wheatstone bridge is arranged for measuring the resistance of an A.C. energized winding, such as a transformer winding or a motor stator winding, without de-energizing the winding. A load such as the stator winding 9, Fig. 1, of a motor is energized from the secondary winding 5 of a transformer 3. A transformer 12 has its primary winding 13 connected across the secondary winding 5 and its secondary winding 16 connected in series with the winding 9 to form one arm of a Wheatstone bridge 18. A blocking capacitor 23 blocks D.C. from the primary winding 13. The voltage developed in the transformer secondary winding 16 is equal to and 180 degrees out of phase with the voltage across the winding 9 so that no A.C. voltage appears across the terminals 19, 21 of the bridge, which measures the resistance of the load winding 9 and transformer secondary winding 16. The resistance of the winding 16 is measured in advance, so that the bridge 18 can be calibrated to read the resistance of the winding 9 directly. A double-pole switch 25 may be provided for connecting the transformer windings 13, 16 when a measurement is to be made. In a modification, Fig. 3, a low-pass filter circuit 32 comprising a series connected reactance 33 and filter capacitor 34 ,is employed instead of the transformer 12, the resonant frequency, of the filter circuit being below the frequency of the energizing voltage. Since substantially no voltage appears across the capacitor 34, all the voltage appearing across the terminals 10, 11 of the load winding 9 appears across the reactance 33, so that no A.C. voltage appears across the bridge terminals 19, 21. A capacitor 23 blocks D.C. from the circuit to which the load winding 9 is connected, so that the bridge 18 measures only the resistance of the load winding 9 and the known resistance of the reactor 33. A fuse 36 is provided in series with the filter 32 to protect the circuit. in the event of resonance between the filter capacitor 34 and the load inductance 9. Fig. 4 shows a modification for measuring the resistance of any part 39 of a series of A.C. energized windings 38. The reactance 33 is arranged in series between the side 40 of the winding 39 and the terminal 19 of the bridge 18, the side 41 of the winding 39 being connected directly to the bridge terminal 21 and the filter capacitor 34 being connected across the bridge terminals 19, 21. The circuit of Fig. 1 may also be employed to measure the resistance of part of an A.C. winding.
2.670997Improvements in or relating to paper roll holders and their manufacture
GB - 30.04.1952
Int.Class A47K 10/40
AHUMAN NECESSITIES
47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
KSANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
10Body-drying implements; Toilet paper; Holders therefor
24Towel dispensers; Toilet paper dispensers
32Dispensers for paper towels or toilet-paper
34dispensing from a web, e.g. with mechanical dispensing means
38the web being rolled-up
40with extensible or collapsible roll supports
 Appl.No 2356249 Applicant W B C PACKINGS LTD Inventor ANSELL JEFFREY MAURICE
670,997. Roll holders. W. B. C. (PACKINGS), Ltd. Nov. 2, 1950 [Sept. 13, 1949], No. 23562/49. Class 18 The blade 17, for serving a length of paper from a roll mounted on a spindle between two brackets 2, is attached at each end to a tubular member 9 telescopically fitted and resiliently urged within a second tubular member 4 so that the blade 17 is resiliently maintained in contact with the roll. A spring 16 may be attached to opposite ends of the members to resiliently urge the one within the other. The members 4 are rigidly secured to the brackets by a nut engaging a stud 7 projecting through the bracket from a square boss 6 adapted to engage in a similarly shaped hole in the bracket. The boss 6 is permanently secured to the member 4 so that by adjusting the position of the boss 6 in the hole the blade 17 can be suitably positioned with respect to any position occupied by the brackets 2. In an alternative arrangement, two tubular members, one slidable within the other, may be slidably mounted in the fixed tubular member 4.
3.671038Improved method of and apparatus for countercurrent contacting of solids with liquids
GB - 30.04.1952
Int.Class B01D 11/02
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
11Solvent extraction
02of solids
 Appl.No 2900648 Applicant STANDARD OIL DEV CO Inventor
671,038. Making extracts. STANDARD OIL DEVELOPMENT CO. Nov. 8, 1948 [Dec. 6, 1947], No. 29006/48. Class 81 (i). [Also in Group II] A method of contacting a liquid with granular solids of approximate particle size 20-200 mesh per linear inch in contiguous superposed zones separated by perforated partitions comprises, introducing said solids into an upper zone and introducing said liquid into a lower zone, thereafter passing said liquid upwardly through successive superimposed zones to said upper zone, said liquid being introduced to each of said zones at a plurality of points at the lower level of each zone at an upward velocity not exceeding approx. 1-5 feet per minute (to maintain a slurry in each zone, surmounted by a liquid layer) and being removed from the upper zone; maintaining the solids in a restricted column extending between adjoining zones as a dense slurry phase and preventing substantial liquid flow through said column whereby the solids flow downwardly through successive zones and are removed from said lower zone. The apparatus shown has perforated plates 25 on which the slurry phase is maintained and downcomers 6 to accommodate the columns of dense slurry. The solids enter at 2 and leave at the bottom and the liquid flows in at 5 and out at 4. Vanes 9 can be rotated to seal the downcomers until the dense slurry column is initially formed. The zones are separated by plates 15 and the pumps 17, with pipes 16 and 18, are provided to increase the pressure differential, and thus the throughput, of the apparatus.
4.671065Improvements in and relating to control mechanisms for electric motor control gear
GB - 30.04.1952
Int.Class H02P 1/06
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
1Arrangements for starting electric motors or dynamo-electric converters
02Details
04Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
06Manually-operated multi-position starters
 Appl.No 1895549 Applicant ENGLISH ELECTRIC CO LTD Inventor BENNETT JAMES HOLMES
671,065. Controllers. ENGLISH ELECTRIC CO., Ltd. July 18, 1950. [July 19, 1949] No. 18955/49. Class 38 (iii). Coarse adjustment of a rheostat used for electric motor control is effected when a lever 3 is rotated to operate a chain 8, a bevel gear wheel 10 meshing with wheel 9 which is fixed to the operating-shaft 6. The lever 3 is freely journalled in a fork 5 which is in turn free to rotate on shaft 6 and which carries a balance weight 12. Fine adjustment is afforded by limited operation of the chain when the lever 3 is moved, without rotating it, in either direction in a quadrant 2. The lever may then be released and returned to a central position without operating the chain 8, the bevel gear wheel 10 idling over the wheel 9. The application to the individual control of a number of motors in a rolling mill drive is referred to. The rheostat may be operated directly from the shaft 6, through other mechanical drives, or through a servo system. The weight 12 may be replaced by a spring. Position-indicating devices may be carried on the knob 11 or the chain 8. Specification 621,067 is referred to.
5.671135Improvements in or relating to transmitter-receiver radio communication systems
GB - 30.04.1952
Int.Class G01S 13/78
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
13Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
74Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
76wherein pulse-type signals are transmitted
78discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
 Appl.No 267449 Applicant MINI OF SUPPLY Inventor MILLS JOHN ROBERT
671,135. Pulse modulation systems; radiolocation. MINISTER OF SUPPLY. Jan. 27, 1950 [Jan. 31, 1949], No. 2674/49. Classes 40 (v) and 40 (vii). An intelligence transmission system comprises a transmitter station, which may be a radar responder, radiating groups of pulses the spacings between the individual pulses of which are characteristic of the elements of intelligence (e.g. dots and dashes) to be transmitted, and a receiver comprising a plurality of coincidence circuits each of which delivers an output signal only in response to a particular group of pulses corresponding to a particular element, an equal plurality of integrator circuits each associated with the output of a coincidence circuit and operating means to present the appropriate element of intelligence when the integrated output signals reach a predetermined level. In one embodiment, in which the receiver is associated with the interrogator 1 of a radar system and the transmitter comprises a responder beacon 2, pulses radiated from the interrogator at, for example, a p.r.f. of 150 per sec. each initiate the transmission of a group of pulses from the beacon. These groups may be pulse pairs, the spacing between which is different according to whether a dot or a dash is being transmitted. The relative length of the dot and dash transmissions (that is the relative number of pulse groups in each) is the same as in normal signalling. At the receiver 3 a locally generated strobe pulse derived over line 1A each time an interrogation pulse is transmitted is automatically locked to the first response pulse and fed through delay lines in circuits 6 and 7 corresponding to the pulse pair spacings for dots and dashes respectively to open gate circuits so that pulses corresponding to " dot " groups are passed by circuit 6 and pulses corresponding to " dash " groups by circuit 7. These two series of pulses are fed respectively - to integrators 8 and 9. The integrators are arranged to trigger the presentation means 10 even though some pulse groups are lost in transmission and yet not to operate in response to interfering pulses accidentally possessing suitable spacing but not being repeated as are the true signals. They are also arranged to fail to operate when signals are applied to them at less than a certain frequency. The presentation means may comprise a local audiofrequency generator keyed by the integrator outputs to provide dots and dashes in a headphone circuit. The integrator circuits are described with respect to Fig. 2 (not shown). Radiolocation. The interrogator pulses are also fed from unit 1 to range circuit 4 when the time elapsing between their arrival and that of the first response pulse from receiver 3 is determined and used to indicate range, reply pulses other than the first in each pulse group are prevented from having any effect on the range circuits. A p.r.f. considerably less than that required for intelligence transmission is adequate for range determination and the interrogator may be arranged normally to operate at a p.r.f. of 30 per sec. at which frequency range will be shown but the reply pulses will not be frequent enough to operate the integrator circuits. When it is desired to receive communications from the beacon the p.r.f. is increased, this arrangement enables a number of craft to use the beacon at the same time with a minimum of interference one with another. The pulse pairs used for signalling may be followed by a further pulse, after a constant delay characteristic of the beacon, for beacon identification purposes.
6.671163Improvements in bimetal strip thermostatic switches
GB - 30.04.1952
Int.Class H01H 37/52
HELECTRICITY
01ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
37Thermally-actuated switches
02Details
32Thermally-sensitive members
52actuated due to deflection of bimetallic element
 Appl.No 684450 Applicant PERMA SA Inventor
671,163. Thermal switches. PERMA SOC. ANON. March 20, 1950. [March 23, 1949] No. 6844/50. Class 38 (v). A thermal switch for controlling the temperature of an electric heater 2, comprises a frame 1 with a pin 5 on which are freely pivoted a bimetallic strip 3 and a metal supporting member 6, the latter supporting flexible blade. contact carrying members 8, 9. As the temperature of the heater rises, the blade 3 deforms, its middle portion coming into contact with the heater 2 and its free end lifting a push piece 12 secured to the blade 9, so as to raise the free end of the blade 9 to open the contacts 11. An adjusting screw 18 carried by the frame 1, has a tip which engages the end of the member 6 to determine the extent to which the bimetallic strip must deform to cause opening of the contacts.
7.671175Soluble zirconium sulphate salt compositions and method for preparing the same
GB - 30.04.1952
Int.Class C01G 25/06
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F94
25Compounds of zirconium
06Sulfates
 Appl.No 1222650 Applicant TITAN CO INC Inventor
An ammonium zirconium sulphate composition is produced by heating at 400-600 DEG C for 5 minutes to 2 hours a comminuted admixture of 1 mol. zirconium oxide and 2-3.5 mols. ammonium slphate. Baddeleyite or commercial zirconia may be used. The composition of the product varies with the heating time and temperature, and comprises ammonium 2-12 per cent, cationic hydrogen not greater than 0.7 per cent, zirconium oxide ZrO 20-30 per cent and sulphate 55-70 per cent. The salt (NH4)2 H2ZrO (SO4)3 may be produced. The reactant mixture is heated as a layer, e.g., in stainless steel trays.
8.671189Improvements in and relating to apparatus for grading apples and like fruit
GB - 30.04.1952
Int.Class B07B 13/07
BPERFORMING OPERATIONS; TRANSPORTING
07SEPARATING SOLIDS FROM SOLIDS; SORTING
BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
13Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
04according to size
07Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement
 Appl.No 1716550 Applicant ANDRIES WILHELM JANSEN Inventor
671,189. Fruit grading apparatus. JANSEN, A. W. July 10, 1950 [Aug. 9, 1949], No. 17165/50. Class 117 In a fruit grading apparatus comprising a transversely inclined conveyer belt 1 with a guide 4-8 at its ower side having grading spaces of increasing height in the direction of travel, the profiles of the cross-sections of the guide throughout its length subtend the same angle d with the belt. As shown in Figs. 1 and 2 the guide comprises a number of strips 4, 5, 6, 7 and 8 arranged with their lower edges in steps both transversely and longitudinally to provide a series of guiding edges and grading spaces respectively for the various sizes of fruit, the lowermost strip 8 being terminated in the direction of travel. Fig. 3 shows an arrangement wherein transversely stepped guiding strips 4, 5, 6, 7, 8 and 8a have an upward slope in the direction of travel, the strips being terminated where their lower edges reach just above the height of the largest fruit dealt with. In this case the lowermost strip 8a extends throughout the grading length of the belt and the partitions 10 dividing the collecting table 9 may be positioned for any desired size ranges. The strip 8a may be adjustable.
9.671216Improvements in or relating to printing and/or embossing machines
GB - 30.04.1952
Int.Class G07B 17/00
GPHYSICS
07CHECKING-DEVICES
BTICKET-ISSUING APPARATUS; TAXIMETERS; ARRANGEMENTS OR APPARATUS FOR COLLECTING FARES, TOLLS OR ENTRANCE FEES AT ONE OR MORE CONTROL POINTS; FRANKING APPARATUS
17Franking apparatus
 Appl.No 3154448 Applicant RONEO NEOPOST LTD Inventor
671,216. Postmarking-machines. RONEONEOPOST, Ltd., and LANGDON, F. E. Dec. 6, 1949 [Dec, 6, 1948], No. 31544/48. Class 100 (ii). In a rotary printing or embossing machine, particularly for franking insurance cards, and of the kind in which there is a counting-device which locks the printing &c. mechanism after a predetermned number of printing &c. operations have been performed, and a supporting roller in the base of the machine which co-operates with the printing &c. mechanism, a small frame is secured over the base in such a position as to indicate the area on a card, placed between the printing &c. mechanism and the base, which will be printed &c. by operation of the machine. As shown, the machine comprises a unit 1, detachable from the main body 2, which contains a printing-drum, and has a small frame 6 in the nature of a window attached to the bottom of the unit so that it will indicate the area where printing &c. will be effected. The base 3 contains a freely rotatable rubber impression roller mounted on a shaft so as to project through a slot in the base. The printing-drum is mounted on a shaft which is clutched to a handle 10. The unit 1 has a lid 5.
10.671230Improvements in umbrellas, parasols and the like
GB - 30.04.1952
Int.Class A45B 25/10
AHUMAN NECESSITIES
45HAND OR TRAVELLING ARTICLES
BWALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
25Details of umbrellas
10Umbrella crowns
 Appl.No 2905549 Applicant T H LAWTON & CO MANCHESTER LTD Inventor
671,230. Umbrellas. LAWTON & CO. (MANCHESTER), Ltd., T. H., and SCHAEFER, G. M. Nov. 13, 1950 [Nov. 14, 1949], No. 29055/49. Class 134. The upper or lower end of the stick 1 is threaded and carries a disc 3 recessed at 7 for a label 8, and lower disc 6 of transparent material screwed on to the stick.
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