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1. 发明专利

GB671847A Improvements in or relating to portable battery lamps 未知
公开(公告)号：GB671847A
公开(公告)日：1952-05-14
申请号：GB2431149
申请日：1949-09-21
申请人： EVER READY CO , MEASUREMENT LTD , WILLIAM MILLER SEDDON CAWLEY , ERIC WILLIAM LINDSAY COWAN
IPC分类号： F21L4/00
摘要： 671,847. Battery lamps. EVER READY CO. (GT. BRITAIN), Ltd., MEASUREMENT, Ltd., METROPOLITAN POLICE DISTRICT, RECEIVER FOR, CAWLEY, W. M. S., and COWAN. E. W. L. Nov. 24, 1950 [Sept. 21, 1949], No. 24311/49. Class 39(ii) A portable battery lamp comprises a dished base 1, made of thin sheet metal such as anodized aluminium alloy, with a rigid, preferably diecast chassis 16 secured within it and extending around its interior to provide a reinforcing lip or edge to engage and locate a dished cover 2 hinged at the upper end of the base and provided with an opening within which a reflector 11 and bulb-holder 15 a r e maintained by a lens 9 and retaining-ring 10, a bridge 18 formed integrally with the chassis 16 and extending transversely between opposite sides thereof being apertured to receive the back of the reflector and inner end of the bulb-holder when the cover is closed. The cylindrical inner end of the reflector 6 is screw-threaded as far as an internal flange 12 against which a holding-disc 13 for a pre-focussed lamp bulb 14 is held by a threaded insulating- sleeve 15. When the cover 2 is closed the central contact of the bulb is engaged by a contact strip 27 which is mounted on the upper limb of an inverted L-shaped element 20 which is integral with the bridge portion 18 of the chassis 16, the contact 27 being insulated from the element 20 and conected to a contact member 28 in engagement with the top terminal 29 of the battery. A switching-contact 24 at the upper end of a further contact strip 21 completes the lamp circuit when pressed against the reflector 6 by the depression of a plunger 30 mounted on the upper end of the base 1, the lower end of the strip 21 being normally in abutment with a battery contact 22. The vertical limb of the element 20 is secured to the base 1 by rivets 20a, and thus maintains the chassis in position; in addition, it serves also to maintain the contact strio 21 in position beneath it with interposed insulating strips 25, 26 A clip to hold a spare bulb may be mounted on the bridge portion 18 of the chassis. A bowed metal strip 37 at the lower end of the base serves to press the battery contact 29 upwardly against the adjacent fixed contact 28, and a sliding-catch 33 operated by a push-button 34 is movable relative to the base 1 to retain the cover 2 in the closed position. A wire carrying-loop 39 pivotally mounted on the rear of the casing may be narrowed to the form of a keyhole-slot at its upper end for attachment to a button on a garment. Alternatively a resilient metal tongue that can be hooked upon a belt is provided.

2. 发明专利

GB321492A Improvements in and relating to devices adapted to utilise wind power 未知
公开(公告)号：GB321492A
公开(公告)日：1929-11-14
申请号：GB2517528
申请日：1928-09-01
申请人： ERIC WILLIAM LINDSAY COWAN
IPC分类号： H02P9/00
摘要： 321,492. Cowan, E., W. L. Sept. 1, 1928. Dynamos, regulating; driving-arrangements.- A wind-driven generator is provided with a single field and two separate armatures and means for automatically connecting the armatures in series and parallel when the wind velocity is low and high respectively. Means may also be provided for controlling the field current and as an alternative to the series-parallel arrangement of two similar armature windings, two armature windings having different speed-volt characteristics and a common field may be employed. Or two separate dynamos with different speed-volt characteristics and a common or separate field, may be used. In these cases, the series -parallel switch which is used with the first-named arrangement is replaced by a selecting device operated by the output current to switch the load from one armature to the other. In the form shown, the two armature windings 3, 4 are brought out to the bus-bars 10, 7 across which the field coil 5 is connected in series with a rheostat SR. By means of a switch M, comprising a rocking-arm and mercury cups, the contacts M , M and M , M may be closed to parallel the armatures or the contacts M , M' and M , M to connect the armatures in series. The switch is actuated by a magnet coil 17 energized from a low-voltage generator 23 connected to the main shaft, which machine also energizes the moving coil 24 of the field rheostat SR. This may comprise a number of mercury cups tapped to the resistance and an arm carrying a knife edge which makes contact with the mercury meniscus. An anti-flashing resistance 5a is connected across the field coils 5 and a resistance S is provided for doubling the range of the field regulator SR. The armatures are normally connected in series and as the wind velocity rises the increasing volts of the machine 23 cause the regulator SR to reduce the field current. At a limiting velocity, the switch M changes over to parallel connection and the field resistance is cut out, the resistance S being at the same time inserted in series with the operating coil 24. Further increase of velocity inserts field resistance until at a higher limit, when the velocity is dangerous, an overload coil a across the bus-bars causes the wind motor to shut down. As the wind falls, the sequence of connections is reversed. The arrangement shown includes a battery-charging system with the usual cut-out 28 for switching on when the requisite voltage is available.

3. 发明专利

GB541836A Improvements in and relating to gas producers 未知
公开(公告)号：GB541836A
公开(公告)日：1941-12-15
申请号：GB834440
申请日：1940-05-09
申请人： PARKINSON & COWAN GAS METERS L , ERIC WILLIAM LINDSAY COWAN
IPC分类号： C10J3/80
摘要： 541,836. Gas-producers. PARKINSON & COWAN (GAS METERS), Ltd., and COWAN, E. W. L. May 9, 1940, No. 8344. [Class 55 (i)] The supply of water to an atomizer in the air inlet of a gas producer is automatically controlled so that all load conditions, a gas of substantially constant composition is obtained, by means determining the proportion of water in relation to the primary air in dependence upon the quantity of air flowing through the inlet. In Fig. 3, which shows a choke tube leading to the air supply duct, the choke tube 3 which is slidable in the pipe 4 is urged to the left by a spring 5, being displaced relatively to the water jet 2 by the passage of air through the pipe 4. In Fig. 4, the jet is provided with a tapered needle 9 carrying a suction disc 8 and being urged to the left by a spring 5, so that, on increased suction in the pipe 4, a thicker part of the needle enters the jet orifice. In Fig. 2, one of two induction tubes is shown, each having a choke tube c and jet e of sizes different from those in the other tube 9, the jets e being each supplied through a pipe p with water from a constant level tank i. In the main branch j, the jet e and choke tube c are comparatively small while in the subsidiary branch they are larger so that, at high air speed, the deficiency of water provided by the small jet is made up by the water provided by the larger jet. An extra air valve s is provided.

4. 发明专利

GB574284A Improvements in or relating to water cooling systems for internal combustion enginesor the like 未知
公开(公告)号：GB574284A
公开(公告)日：1945-12-31
申请号：GB9544445
申请日：1945-02-19
申请人： PARKINSON & COWAN GAS METERS L , ERIC WILLIAM LINDSAY COWAN , KENNETH REID GREEN
IPC分类号： F01P5/10 , F01P11/20
摘要： 574,284. Cooling systems for internalcombustion engines &c. PARKINSON & COWAN (GAS METERS), Ltd., COWAN, E. W. L., and GREEN. K. R. Feb. 19, 1945, No. 954/44. [Class 64 (iii)] The temperature of the water cooling system of an internal combustion engine &c. is maintained above a predetermined minimum, irrespective of whether or not the engine is running, by a continuously-operable solid or liquid-fuel fired water heater c which has water flow and return pipes e, g respectively connected to different points of the said cooling system. The flow pipe e may, for example, be connected to the drain plug outlet f of the engine water jacket b, and the return pipe g to aT-piece h in the pipe connecting the lower part of said jacket to the bottom of radiator a.

5. 发明专利

GB321661A Improvements in and relating to electric time switches 未知
公开(公告)号：GB321661A
公开(公告)日：1929-11-11
申请号：GB1681128
申请日：1928-06-09
申请人： ERIC WILLIAM LINDSAY COWAN , WILLIAM EDWIN KING , MEASUREMENT LTD
IPC分类号： G04C23/10
摘要： 321,661. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). Aug. 9, 1928. Cellulose ethers. - Water-insoluble cellulose ethers, are purified by extraction with a mixture of water and a water-soluble solvent, whereby the constituents of the ether which are of low viscosity and swell in water are removed. The, extracting agent may be dilute alcohol, dilute acetone, or dilute acetic acid. To improve the colour of the product, there may be added to the extracting agent a small proportion of an alkali and/or of a bleaching agent such as hydrogen peroxide. The low-viscosity constituents taken up by the extracting agent can be precipitated therefrom by addition of electrolytes. Examples describe the purification of ethyl cellulose with dilute alcohol alone or with an addition of caustic soda or caustic soda and hydrogen peroxide; in each example, the extraction is effected at ordinary temperature, but higher temperatures can be applied if the extracting agent is modified. Purification as described above renders the cellulose ethers more suitable for use in the manufacture of artificial threads, plastic masses, and lacquers.

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