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1. 发明专利

GB504679A Improvements in or relating to safety razors 未知
公开(公告)号：GB504679A
公开(公告)日：1939-04-28
申请号：GB1567338
申请日：1938-05-26
申请人： ALEXANDER MACDONALD
IPC分类号： B26B21/18
摘要： 504,679. Safety razors. MACDONALD, A. ,May 26, 1938, No. 15673. [Class 30] The end cap D is pivoted by means of arms D on the ends of a cross-rod C secured to a rod C sliding and adjustably locked in .the handle B. The rod C' passes through slots B in the walls of the handle, and through slots A in plates A integral with the guard plate A. .The blade is clamped in position for shaving by pressing down the cap D and then turning a screw knob E until it bears on the end C' of the rod C. The blade is positioned by elongated transverse ribs A formed on the plate A.

2. 发明专利

GB458995A Improvements relating to gas producers 未知
公开(公告)号：GB458995A
公开(公告)日：1936-12-31
申请号：GB2318835
申请日：1935-08-17
申请人： JAMES ALEXANDER MACDONALD
IPC分类号： C10J3/34
摘要： 458,995. Collecting and removing ashes &c. MACDONALD, J. A., 26, Victoria Street, Westminster. Aug. 17,1935, No. 23188. [Class 51 (i)] In a gas producer 1 having a restricted combustion zone adjacent a tuyere arranged in the aperture 3, ash and clinker are lowered upon a vertically adjustable plate 13 arranged beneath an opening in the producer bottom into a drawer arranged within an air-tight chamber 6 and comprising side plates and a back plate 11 to which is attached a horizontal extension 10 which, when the drawer is removed from the chamber 6 through the door 14, closes the opening in the bottom of the producer. The plate 13 is connected by pairs of pivoted links 29, 30 to nuts 25, 26 mounted on a handactuated spindle 20 provided with right- and left-handed threads by which the plate is raised and lowered. Specification 336,932, [Class 55 (i)], is referred to.

3. 发明专利

GB315158A Improved shoe-cleaning device for use on automobiles 未知
公开(公告)号：GB315158A
公开(公告)日：1929-07-11
申请号：GB2970228
申请日：1928-10-15
申请人： ALEXANDER MACDONALD
IPC分类号： B60R15/02
摘要： 315,158. MacDonald, A. Oct. 15, 1928. Scrapers, pot. - A shoe-cleaning device adapted to be secured to the running-board of a motor vehicle comprises a plate 1 having a rectangular aperture preferably traversed by scrapers 26, a lid 13 hinged to the plate to open or close synchronously with the opening or closing of a hinged drop bottom 11, and brushes 29 are hinged to the lid and adapted to be used after the shoes have been scraped. The lid 13 and drop bottom 11 are secured to shafts 5, 8 respectively, which are journaled in bearings in the plate 1 and are provided with interengaging toothed segments so that the bottom 11 opens and closes in accordance with the opening and closing of the lid 13. Springs 15 tend to keep the lid open. The lid and bottom are held in the closed position by means of detents secured to a spring-pressed frame 20 and adapted to engage in apertures in the lid 13 and beneath the edge of the bottom 11. The detents are withdrawn by means of a foot-operated trigger 23 the bottom of which engages an apertured lug on the frame 20. The brushes 29 are hinged to the shaft 5 and are held in the inoperative position by means of catches 30 engaging in apertures 32 in the brush frame. The catches are secured to a pivotally-mounted rod 31 provided with a spring-pressed finger-piece, the actuation of which releases the brush frame allowing the brushes to fall to the horizontal position above the scrapers. The device may be provided with a kick-plate 37. A rubber mat may be provided on the top of the lid 13.

4. 发明专利

GB226001A Improvements in electric water heaters 未知
公开(公告)号：GB226001A
公开(公告)日：1924-12-18
申请号：GB2786623
申请日：1923-11-06
申请人： JAMES ALEXANDER MACDONALD
IPC分类号： F24H1/10
摘要： 226,001. Macdonald, J. A. Nov. 6, 1923. Wire resistances, embedded; mounted on grooved surfaces.-A water heater 1 is provided with one or more heating elements comprising a refractory non-conducting core having a plurality of longitudinal peripheral slots 8 containing a resistance, the elements being disposed in housings 6 readily removable from the heater. The resistance is preferably in the form of a ribbon disposed with one of its edges projecting outwardly so as to form fins on the core, and is secured in the slots by cement the setting of which is completed by sending a current through the resistance. The ends of the resistance are fused to the supply leads 12 and are then embedded in cement pressed into the groove 13 in the core. A filling of asbestos fibre renders the housing moisturetight. The junction box at the bottom of the heater is in two parts 18, 19 and contains the inlet elbow 5. A switch may be fitted in place of the cover plate 21, if desired.

5. 发明专利

GB190727779A Improvements in the Valve Gear of Steam or other Fluid Pressure Engines. 未知
公开(公告)号：GB190727779A
公开(公告)日：1908-11-19
申请号：GB190727779D
申请日：1907-12-17
申请人： MACLEAN ALEXANDER MACDONALD
发明人： MACLEAN ALEXANDER MACDONALD
摘要： 27,779. Maclean, A. M. Dec. 17. Drawings to Specification. Steam pumps.-In valve-gear for the power cylinder of a direct-acting pump, separate inlet and outlet valves are operated by a tappet-lever actuated from the piston-rod through a spring-controlled oscillating lever and sliding rod.

6. 发明专利

GB190426238A Improvements in or relating to Ration Packs. 未知
公开(公告)号：GB190426238A
公开(公告)日：1905-01-26
申请号：GB190426238D
申请日：1904-12-02
申请人： DAVIS ALEXANDER MACDONALD
发明人： DAVIS ALEXANDER MACDONALD
摘要： 26,238. Davis, A. M. Dec. 2. Equipments.- Relates to a ration pac k embodying separate pockets A, B, B', detachably connected together by lacing, and supported by shoulder straps and a belt, to which the pockets are attached by hooks. The pocket A is adapted to contain a mess pan, a receptacle for bacon, and a satchel for oddments, and has a sub-pocket for a towel &c. The mess pan may be used as a bread container, cooking-pan, or, with a cover, as a dutch oven. The cover, when attached to the handle of the combination pick and hatchet K , can be used as a shovel. The pocket B contains a double-ended sugar and coffee receptacle and has room for two emergency rations and a razor. The pocket B' is adapted to receive a canteen and tin cup, curved to conform to the body.

7. 发明专利

GB763194A Improvements in or relating to the relaying of television pictures over wires 未知
公开(公告)号：GB763194A
公开(公告)日：1956-12-12
申请号：GB1532853
申请日：1953-06-03
申请人： BRITISH RELAY WIRELESS LTD , KENNETH ALEXANDER RUSSELL , DONALD ALEXANDER MACDONALD
IPC分类号： H04N7/10
摘要： 763,194. Distributing music &c. BRITISH RELAY WIRELESS, Ltd., RUSSELL, K. A., and MACDONALD, D. A. May 25, 1954 [June 3, 1953], No. 15328/53. Class 40 (4). In a wired television relay system two screened cables are provided, each having two or more pairs over which video and audio signals are transmitted, and a sinusoidal signal, which provides line-scanning power, is transmitted over a phantom circuit using some or all of the conductors of each cable. As described, each of the cables 10, 11 has two pairs of conductors over each of which the video and audio signals pertaining to a separate television programme are transmitted. The four conductors (e.g. 12-15) are laid up as a quad around a central unpaired conductor (e.g. 16) and the whole is surrounded by a screen (e.g. 17) The combined vision and audio signals for the four television channels are applied to windings 30-33 of the four input transformers. The vision signals are in the form of amplitude modulation on a high-frequency carrier for example of 3.5 Mc/s. The frame scan waveform is applied to winding 50 and hence is transmitted over a circuit formed by the two central conductors 16 and 22 balanced about the screens of the two cables. The sinusoidal line scan power is obtained from generator 55 and is transmitted over a phantom circuit formed by the screens and the five conductors of each cable. This circuit effectively has conductors of larger section than the paths for the frame scan, vision and audio signals, which is desirable since the line scan power is substantially larger than that transmitted over any of the other paths. At each receiver the ganged contact arms 64, 69 serve to select the desired programme. The frame scan signals are applied to the two halves 80, 81 of a split time-base deflection coil, connected respectively between the centre conductors 16, 22 and the screens 17, 23. The two screens are also coupled through condensers 82, 83 to transformer 85 from which line defection power and E.H.T. voltage may be obtained as described in Specification 763,193. This power can be taken from the phantom circuit by coupling to the screens only since there is a large capacity between them and the conductors.

8. 发明专利

GB763193A Improvements in or relating to wired television broadcasting systems 未知
公开(公告)号：GB763193A
公开(公告)日：1956-12-12
申请号：GB3159952
申请日：1952-12-12
申请人： BRITISH RELAY WIRELESS LTD , KENNETH ALEXANDER RUSSELL , DONALD ALEXANDER MACDONALD
IPC分类号： H04N7/10
摘要： 763,193. Distributing music &c. BRITISH RELAY WIRELESS, Ltd., RUSSELL, K. A., and MACDONALD, D. A. Dec. 9, 1953 [Dec. 12, 1952; June 3, 1953], Nos. 31599/52 and 15372/53. Class 40 (4). In a wired television broadcasting system the receivers are supplied with video signals, frame deflection signals and a sinusoidal power supply, the last supply forming the sole power supply for the line time-base deflection circuits of the receivers. In the description it is assumed for convenience that the line scanning frequency is 10 kc./sec. First embodiment. The drawing accompanying the Complete Specification shows an arrangement in which the line deflection power is derived from a 5 kc./sec. sinusoidal supply which is locked in phase with television line synchronizing pulses at the central station and applied over leads 50, 51 to step-up auto-transformer 52 tuned to 5 kc./sec. The output is full-wave rectified, the rectifier circuit being completed through a tapped portion of autotransformer 60 tuned to 10 kc./sec., a tapped portion of auto-transformer 61 broadly tuned to 50 kc./sec., and a load resistance 62 which is conveniently constituted by the heater of the cathode-ray tube of the receiver. This circuit is stated to remove about 60 to 70 per cent of the 10 kc./sec. harmonic and about 20 per cent of the 20 kc./sec. harmonic, the remaining harmonic components providing a linear sawtooth wave with a recurrence frequency of 10 kc./sec. Adjustment of condenser 65, resistor 66, and the tapping on transformer 60 provides control of the harmonic components. The unwanted 10 kc./sec. output of transformer 60 may be used to provide E.H.T. Transformer 61 provides the line scan waveform to the deflection plates. Second embodiment. The drawing accompanying second Provisional Specification shows an arrangement in which the sinusoidal supply, which is of the required line scan frequency, e.g. 10 kc./sec., is applied to the primary winding 10 of a transformer having two balanced secondary windings 11, 12 wound in the same sense. The leakance inductance of the secondary windings is tuned to the input frequency by condensers 13, 14, 15, and the outer ends of these windings are connected to ground and one plate of E.H.T. reservoir condenser 16, and to the other plate of condenser 16 and the final anode 17 of the cathode-ray tube, respectively. The windings 11, 12 are tapped at 21, 24, respectively, a first pair of rectifiers 19, 20 being connected between tap 21 and the inner end of winding 12 and a second pair 22, 23 between tap 24 and the inner end of winding 11. A load resistor 25, in series with fixed resistor 26 and adjustably tapped resistor 27, is connected between the junction point of rectifiers 19, 20 and the outer end of winding 12; and a load resistor 28, in series with resistor 29, between the junction point of rectifiers 22, 23 and the outer end of winding 11. The junction points are also connected via D.C. blocking condensers 30, 31, respectively, to condensers 33, 32, the other plates of which are connected to the outer end of winding 11. The condensers 32, 33, in series with 31, 30, form with the load resistors 28, 25 two resistance-capacity time constant circuits and saw-tooth waves in push-pull are developed across condensers 32, 33, and applied to the deflector plates 34, 35. The voltage developed across the reservoir condenser 16 supplies E.H.T. The variable condensers 40, 41 add small portions of the sinusoidal input thereby improving the linearity of the sawtooth output. H.T. voltage for the first anode 42 is obtained at the junction of resistors 25, 26, and the bias voltage for the cathode 43 from the top on resistor 27.

9. 发明专利

GB541246A Improvements in gas producers, retorts or combustion stoves 未知
公开(公告)号：GB541246A
公开(公告)日：1941-11-19
申请号：GB879540
申请日：1940-05-16
申请人： JAMES ALEXANDER MACDONALD
IPC分类号： C10J3/00
摘要： 541,246. Gas-producers ; retorts ; furnaces. MACDONALD, J. A. May 16, 1940, No. 8795. [Classes 51 (i) and 55 (i)] In the partial or complete combustion of fuels with or without the recovery of by-products, a concentrated fire zone enclosed in fuel is obtained by a primary air supply of relatively low velocity, and a gas outlet of relatively high velocity, the outlet pipe being immersed in the fuel bed and means such as an annular pipe around the inlet pipe to supply steam or other vapour around the inner fire. The apparatus comprises a container 1 with an air inlet pipe 3 surrounded by a concentric inlet 3a, and a gas outlet pipe 5 which may be enclosed in a concentric outlet 5a, the flame being confined to an inner zone 6 and the hottest zone to 7. Approximate isothermals are denoted by 9 to 12. The extent to which the gas outlet pipe 5 projects into the fuel may be varied. Water is supplied by an inlet 5, and some of the gases generated may escape through outlets 13 near the top of the container. The hot zone is enclosed in an envelope of water vapour or other vapour or gases introduced through the annular pipe 3a. Specifications 336,932, [Class 55 (i)], and 480,392 are referred to.

10. 发明专利

IE14244L GAS PRODUCERS 未知
公开(公告)号：IE14244L
公开(公告)日：1937-02-17
申请号：IE14244D
申请日：1936-07-23
申请人： JAMES ALEXANDER MACDONALD
IPC分类号： C10J3/40

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