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1. 发明专利

GB446042A Improvements in or relating to aluminium alloys 未知
公开(公告)号：GB446042A
公开(公告)日：1936-04-23
申请号：GB1237935
申请日：1935-04-24
申请人： NORTHERN ALUMINIUM COMPANY LTD
IPC分类号： C22C21/06
摘要： An aluminium alloy contains up to 3 per cent of magnesium, one tenth to one eighth as much chromium, and not more than 0,35 per cent of impurities. In making the alloy, the chromium may be added to molten aluminium in the form of an aluminium-chromium alloy containing 2-12 per cent of chromium, and the magnesium as metal. The ingots or billets may be heated at 500-540 DEG C. for 15 hours or less, and may be annealed at about 350 DEG C., followed if desired by cold working to produce any required hardness of temper, reductions of 15, 37,5 and 70 per cent being specified in particular examples.

2. 发明专利

GB572429A Improvements in or relating to waggons for draw-benches and like apparatus 未知
公开(公告)号：GB572429A
公开(公告)日：1945-10-08
申请号：GB1936843
申请日：1943-11-19
申请人： NORTHERN ALUMINIUM COMPANY LTD , WILLIAM WHITTLE
IPC分类号： B21C1/28
摘要： 572,429. Drawing-tongs. NORTHERN ALUMINIUM CO., Ltd., and WHITTLE, W. Nov. 19, 1943, No. 19368. [Class 83 (iv)] A wagon for a drawbench tongs has retaining means that normally hold the hook clear of the chain, together with means for effecting release when desired. The hook 3, Fig. 1, is maintained in the raised position clear of the chain 1 by a catch 9 engaging a hook 10 on a spring-biassed lever 11 carried by a bracket 8, on the wagon, that also supports a spring 7 that is unstressed in the position shown. On moving the lever 11 the hook 3 descends under gravity to engage the chain, and at the same time stresses the spring 7. When the load comes on the chain, since the pivot of the hook is above the path of the chain, the hook assisted by the spring 7 rises, lifting the chain, until the catch 9 reengages. At the end of a draw, removal of the load from the hook releases the chain which drops to its normal position, leaving the wagon free to be returned prior to another draw. To prevent accident should the grippers fail to engage, the tube &c. and the hook consequently remain in engagement with the chain in its lowered position, a detent 15 engages a cam 14 on the hook lever to effect disengagement of the hook from the chain and re-engage the catches 9, 10.

3. 发明专利

GB570479A Improvements in or relating to means for preventing escape of pressure fluid from a pressure fluid container through an aperture therein formed by or for a tool or test piece 未知
公开(公告)号：GB570479A
公开(公告)日：1945-07-09
申请号：GB2154543
申请日：1943-12-23
申请人： NORTHERN ALUMINIUM COMPANY LTD , JOHN PRESTON
IPC分类号： C10J3/34
摘要： 570,479. Gas-producers. NORTHERN ALUMINIUM, CO., Ltd., and PRESTON, J. Dec. 23, 1943, No. 21545. [Classes 51. (i) and 51 (ii)] [Also in Group XXVI] A bearing member 1 for a tool or test-piece is angularly adjustable in a base member 3 on a pressure container, e.g. a gas producer, and has an annular recess 5 to which fluid is supplied under pressure greater than the -internal pressure of the container to maintain a seal about the tool 2.

4. 发明专利

GB559450A Improvements in or relating to apparatus for receiving metal or the like from an extrusion press 未知
公开(公告)号：GB559450A
公开(公告)日：1944-02-21
申请号：GB429142
申请日：1942-03-31
申请人： NORTHERN ALUMINIUM COMPANY LTD , WILLIAM WHITTLE
IPC分类号： B23Q7/05
摘要： 559,450. Extruding. NORTHERN ALUMINIUM CO., Ltd., and WHITTLE, W. March 31, 1942, No. 4291. [Class 83 (iv)] Apparatus for receiving extruded metal &c. comprises three series of rollers of which the first is movable relative to the press 4, the second 12 is pivoted to and moves with the first and the third 19 is fixed relative to the press and, with the second, maintains a continuous roller table. The extruded rod &c. 3 is received by a shoe 5 which guides its end over the rollers 1, 12 and 19 and between rollers 8. At the end of the operation the die assembly D is released from the press and moved to the left, with the rollers 1, until the discard can be cut off by a fixed shear, not shown. During this movement the rollers 12, which are connected by pivoted links 13 to the carriage 9 on which the rollers 1 are mounted, move horizontally as guided by two side channels 16, each roller 12, as it approaches the fixed rollers 19, passing below these so that the whole length of the rod 3 is continuously supported. A saw 20 is arranged near the roller table 19.

5. 发明专利

GB550110A Improvements in or relating to metal working 未知
公开(公告)号：GB550110A
公开(公告)日：1942-12-23
申请号：GB775841
申请日：1941-06-19
申请人： NORTHERN ALUMINIUM COMPANY LTD , FRED HOWITT
IPC分类号： C22F1/04
摘要： 550,110. Altering physical or molecular structure. NORTHERN ALUMINIUM CO., Ltd., and HOWITT, F. June 19, 1941, No. 7758. [Class 83 (iv)] Aluminium or magnesium alloy stock is prepared for forging by initially working it at a temperature well below the forging range to such an extent that the grain size, after increasing, has begun to decrease. The temperature is preferably ordinary room temperature and, after working, the stock is rapidly heated to forging temperature, e.g. in a nitrate, molten metal or oil bath, or in rapidly circulated hot air. For an aluminium alloy piston, the billet may be hammered at room temperature to reduce its length 50 per cent or more, heated to 400‹ C.- 450‹ C., and forged. The forging may then be rapidly reheated, e.g. to 490‹. C.-520‹ C., and soaked at this temperature or at a lower one. Instead of hammering, the working may be effected by rolling, drawing, extrusion, &c.

6. 发明专利

GB549479A Improvements in or relating to machines for opening and tailing material, such as sheet metal, in coiled form 未知
公开(公告)号：GB549479A
公开(公告)日：1942-11-23
申请号：GB1275141
申请日：1941-10-02
申请人： NORTHERN ALUMINIUM COMPANY LTD , GEOFFREY DUGARD SHOWELL
IPC分类号： B21C47/34
摘要： 549,479. Feeding webs. NORTHERN ALUMINIUM CO., Ltd., and SHOWELL, G. D. Oct. 2, 1941. No. 12751. [Class 100 (i)] [Also in Group XXII] Material in coiled form is opened and tailed, for feeding into machines as stock, by means of a powerdriven drum of diameter such that reverse coiling thereon followed by uncoiling leaves the material flat. The coil 10 is supported on rollers 12 on a carriage 11 movable towards and from the drum 1 driven by a.motor through reversing gearing. The edge 8 of a clamping member is inserted under the free edge of the material which is forced into the space 9. The drum 1 is then rotated counter-clockwise for about one revolution the coil remaining close to the drum, after which the drum is reversed and the carriage 11 retires till the material is in the position shown in Fig. 4 when the edge is disengaged from the clamp. If it be desired to straighten a longer length the clamp 7 is sunk into the surface of the drum so that more than one revolution may be given thereto. The coil may be supported on cones introduced into its open centre.

7. 发明专利

GB495650A Improvements in or relating to the manufacture of composite metal articles 未知
公开(公告)号：GB495650A
公开(公告)日：1938-11-17
申请号：GB1406837
申请日：1937-05-20
申请人： NORTHERN ALUMINIUM COMPANY LTD , JOHN HARVEY MAYES , CHARLES FREDERICK BRIGGS
IPC分类号： B21C23/22
摘要： 495,650. Extruding coated rods, tubes, &c. NORTHERN ALUMINIUM CO., Ltd., MAYES, J. H., and BRIGGS, C. F. May 20, 1937, No. 14068. [Classes 83 (ii) and 83 (iv)] Extruded rods and wire are formed with an external coating and tubes with an internal and external coating by extruding a composite billet, both metals must however have substantially the same range of extrusion temperature, in the case of aluminium and its alloys from 450 to 500‹ C. The contacting surfaces must be clean and closely fitted and arranged to follow the flow lines during extrusion. The external coating metal 2 may take the form shown in Fig. 5, or that shown in Fig. 6, the maximum cross section of the metal being proximate to the extrusion die. In the case of a hollow billet a lining 5 of the coating metal may be fitted and in this case the maximum section is remote from the die. By varying the degree and regularity of the tapers the extruded articles may be given coatings varying in thickness.

8. 发明专利

GB571474A Improvements in or relating to apparatus for conveying articles from one position toanother 未知
公开(公告)号：GB571474A
公开(公告)日：1945-08-27
申请号：GB1222143
申请日：1943-07-27
申请人： NORTHERN ALUMINIUM COMPANY LTD , LESLIE GEORGE SHEPHERD
IPC分类号： B21J13/08 , B23Q7/04 , B66C13/00
摘要： 571,474. Furnace discharging machines. NORTHERN ALUMINIUM CO., Ltd., and SHEPHERD, L. G. July 27, 1943, No. 12221. [Class 51 (ii)] [Also in Group XXX] Manually-actuated apparatus for conveying articles from one position to another has the article-engaging means mounted in such a manner that it can be moved to any position in a horizontal plane and also vertically. The apparatus is shown in Figs. 1 and 2 arranged to transfer metal billets from a furnace to an extrusion press. Each billet 2 is supported by spaced prongs 29 mounted on a tubular operating handle 11 which is suspended from a trolley 7 movable along a rail 8 disposed transversely to the furnace 1. The rail 8 is carried by trolleys 9 which are mounted on rails 10 extending longitudinally of the furnace. Lugs 12 on the handle 11 are pivotally connected by a stud 13 to a member 14 which is pivoted at 15 to the piston-rod 16 of a cylinder 18 suspended from the trolley 7. When the billet carrier is to be lowered, a valve (not shown) in the piston is opened to allow the passage of fluid from the underside to the top. The valve is actuated through a rod in the hollow pistonrod, bell-crank lever 26, and link 27 by a lever 28 mounted on the end of the handle 11. The billet carrier, handle, piston-rod and their connections are balanced by a counterweight 20.

9. 发明专利

GB566033A Improvements in or relating to systems for the protection of electrically propelled vehicles running on tracks 未知
公开(公告)号：GB566033A
公开(公告)日：1944-12-11
申请号：GB530843
申请日：1943-04-02
申请人： NORTHERN ALUMINIUM COMPANY LTD , VIVIAN SIMON
IPC分类号： B61L3/14
摘要： 566,033. Safety systems for electrically propelled track vehicles. NORTHERN ALUMINIUM CO., Ltd., and SIMON, V. April 2, 1943, No. 5308. [Class 105] In a system in which electrically-propelled track vehicles, for example cranes, are prevented from collision with one another or with end blocks by a relay 7 on the vehicle, cutting off the propulsion current when a vehicle enters an occupied or an end section, the sections being defined by a pair of interrupted conductors 2 arranged alongside the track with the interruptions 3 staggered in the two conductors and the relay being connected to one of the power supply conductors 1 at the intake side of the main switch 8 on the vehicle and to the pair of interrupted conductors 2 by means of contact shoes with the relays on alternate vehicles connected to power conductors of different polarity, there is provided means by which the driver can render the control function of the relay inoperative. It will be seen that if a vehicle enters an occupied section then the relays 7 on the two vehicles will be energized over a circuit from the +ve. supply conductor through a fuse 9, relay 7, contact shoes on one vehicle, to section conductor 2 and thence through contact shoes, relay 7 and fuse 9 on the other vehicle in the section to the - ve. supply conductor, whereby the relays 7 open their contacts 5 to cut off the propulsion current from the motors 6. The operators may, however, render the control ineffective by holding down a push-button 10 to effect a supply of propulsion current. At the end half-sections 4a, a connection is made to the - ve. supply conductor through a resistance 11 so that these half-sections act as occupied sections ; in the case of a 3-wire D.C. supply or a polyphase supply, this connection may be made direct to the neutral wire. The relays may be potentiometer-connected across resistances.

10. 发明专利

GB744053A Improvements in control of automatic machines 未知
公开(公告)号：GB744053A
公开(公告)日：1956-02-01
申请号：GB2530052
申请日：1952-10-09
申请人： NORTHERN ALUMINIUM COMPANY LTD , FRED HOWITT
IPC分类号： G05B19/08
摘要： 744,053. Switching systems. NORTHERN ALUMINIUM CO., Ltd., and HOWITT, F. Jan. 8, 1954 [Oct. 9, 1952], No. 25300/52. Class 38 (4). [Also in Group XXIII] A control system for an automatic machine such as a casting machine, comprises a multipole, multi-way uni-selector switch wherein the operating coil 4, Fig. 1, is energized by a circuit between two contacts N1, N2 in each way 1 ... 25, other contacts N3, L4, L5, L6 in some or all of the ways being connected to operating circuits in the machine to energize the circuits when the poles of the switch engage the respective contacts and de-energize the circuits when the poles advance to the next way. The control system may control a machine for casting aluminium pistons in which the opening of the mould dies takes place in several stages, each being switched in by the closure of a limit switch or micro-switch or operation of a photo-electric relay at the end of the preceding stage. Photo-electric relays may also give warning of the absence of components such as sand cores, mould linings or steel inserts. The casing operation is started by pressing a button 14 to energize the coil 4 and advance the switch poles from the first bank of contacts to the second bank in which a pair of contacts are connected to a single pole, two-way limit switch 9. If the switch is functioning correctly, i.e. capable of being opened by a projection 11 on one of the mould operating jacks 3, 7 when the mould member has reached the correct position, it will complete the circuit through the contacts and transmit a pulse to the coil 4 which then advances the poles to way 3. The contacts of this bank are connected to the switch 9 and to a gas-filled valve or an operating coil 6 for controlling a valve 2 to supply air to the jack. Operation of the latter, which is terminated by the projection 11 closing the switch 9 to transmit a pulse to the coil and again advance the poles, opens a switch 10 for limiting movement of the jack in the return direction. Preferably the limit switch for each operation is checked in the above way, the poles of the selector switch remaining against the bank of contacts connected to any faulty switch. When several parts of the mould are moved together the limit switches are series connected in the manner shown in Fig. 3 to prevent transmission of a pulse to the coil 4 until all the contact switches have the same setting, either C or D. The automatic cycle is arranged to start with the closing of the mould, and the limit switch closed at the end of the mould closure is arranged to switch in an operator circuit including a pyrometer located in one of the outer dies of the mould. The pyrometer controls a capacity relay which switches in an electronic timer when the mould temperature has reached a certain level following the pouring operation which is effected by hand. At the end of the time interval, the coil 4 is energized to advance the poles and switch in the first of the operator circuits controlling opening of the mould dies. The side dies and gudgeon-pin bore dies of the piston mould are moved apart simultaneously, the central core die then being withdrawn followed by the moving together of the outer core-dies. In order to prevent the dies from becoming too cool during the interval between successive casting cycles, a second electronic timer may be switched in when the outer core-dies complete their movements, this timer sounding an alarm bell if the dies are not closed and a further casting poured during the set time interval. The capacity relay of the pyrometer normally de-energizes the circuit of the warning timer through advancement of the selector switch. Up to twelve uni-selector switches may be controlled by a single uniselector switch to provide more operating contacts. Electronic timing relays may be used to time the interval between successive operations in a cycle of operations or between successive cycles, and hydraulic cylinders or electric motors may be used to effect the movements in the cycle. The Provisional Specification refers also to the use of relays and warning lights in the test circuits of the limit switches and to testing all the circuits before the machine cycle proper commences.

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