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    • 83. 发明专利
      GB1259994A POTENTIOMETER STRUCTURE 未知
    • POTENTIOMETER STRUCTURE
    • GB1259994A
    • 1972-01-12
    • GB3032269
    • 1969-06-16
    • MARKITE CORP
    • H01C10/20 , H01C10/40
    • 1,259,994. Resistors. MARKITE CORP. 16 June, 1969 [26 June, 1968], No. 30322/69. Heading HIS. A variable resistor has a rotatable shaft located around which is a substrate carrying a resistance track positioned concentrically with the shaft, the substrate being held relatively to the shaft between a pair of clamping end members applying an axial force to the substrate. In Fig. 2 a plurality of brush assemblies 30 are assembled on a rotatable shaft 40, each having a brush 36, associated with the resistance track 14 of a respective resistance element 10. The brush is located on an arm 35 connected to a slip ring 37. A hairpin wiper 37 1 connected to a terminal 41 contacts the slip-ring. Each resistance element comprises a conductive plastics track on a substrate (12) with terminals 16. The substrates are held in position on the shaft by means of a spring 43 and end members 42, 42 1 acting through axial spacers 20. In Fig. 5 a potentiometer 100 comprises a single resistance element with a resistance track 118 formed on a substrate 120, held in position by end members 126, 132 after adjustment of screw 136. The resistance track may extend from outside the substrate or from its periphery, inwards, such that parts of it may be removed or possibly conductive material added, to effect its calibration, after assembly of the potentiometer. A drill may be used for removing part of the track, the hole then being filled up with a sealant. The other side of the insulator substrates may have one or more trimming resistors, Fig. 4 (not shown).
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 85. 发明专利
      GB1243622A IMPROVEMENTS RELATING TO SIGHTING MEANS FOR MISSILES 未知
    • IMPROVEMENTS RELATING TO SIGHTING MEANS FOR MISSILES
    • GB1243622A
    • 1971-08-25
    • GB2787661
    • 1961-08-01
    • BRITISH AIRCRAFT CORP A T LTD
    • FORD BRIAN , CLAPP MALCOLM
    • F41G3/16 , F41G7/30 , F41G9/00 , H01C10/20
    • 1,243,622. Sighting- devices for missiles. BRITISH AIRCRAFT CORP. (A.T.) Ltd. 30 July, 1962 [1 Aug., 1961], No. 27876/61. Heading F3C. A battery of ground to ground guided missiles, each of which is controlled by electrical signals transmitted from its launching point to the missile while in flight, through electrical leads trailed behind the missile, is guided by signals from a sighting device aimed at the target by an operator. The sighting device, which includes an optical system through which the target is maintained in view by mechanical adjustment, is associated with potentiometers which provide guidance signals which are functions of the instanteous target location corrected for the initial launching position of each missile. The tappings of the potentiometers are coupled together and are moved simultaneously with the optical system while the potentiometer windings, which are fixed, each have an initial setting corresponding to the launching position of the associated missile, The potentiometer signals are applied to pitch- and-yaw programme generators together with signals corresponding to the cross slope of the launching points and the target elevation.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 87. 发明专利
      DE1640379A1  未知
    • DE1640379A1
    • 1970-12-10
    • DE1640379
    • 1967-04-25
    • HONEYWELL INC
    • C MILLER RONALD
    • H01C10/20 , H01C10/36 , H02P13/08
    • 1,125,685. Variable resistors; retractive switches. HONEYWELL Inc. 28 April, 1967 [28 April, 1966], No. 19795/67. Headings H1N and H1S. A combination of an electric switching device and variable resistor comprises at least one resistive element 42, a contact (47), (Fig. 2, not shown), mounted so as to be movable along and in contact with the or either resistance element and to be movable to a rest position, as shown, where it is out of contact with the or each resistive element, a pivoted arm 22 operated by a wheel (14) for moving the contact along the or either element, and a coiled sprirg (8) biasing the contact to said rest position when not being moved. If two resistive elements 41, 42 are used, these are separated by a region covered with highly conducting material 38 and provided with a projection 48 such that in the rest position the arm 43 supporting the contact is resiliently biased away from the resistance tracks by the projection. When wheel (14) is turned, arm 22 is caused to pivot due to the forces exerted on the extrusions 27, 28 by the linkage 19, the contact (47) contacts area 38 as the arm 43 slips off projection 48, and then moves on to either resistance strip 41, 42. A reference potential is applied at 40, i.e. earth, and positive and negative potentials at opposite ends 37 of the resistive elements. The resistive elements are formed by coating arcuate members 33, of insulating material such as phenolic resin attached to the base for example by bonding, with resistive material 34 which may be a quick drying bonding agent with sintered conductive medium dispersed therein, e.g. varnish containing carbon particles. The layer 38 may be of varnish containing silver particles. Projection 48 may be of P.T.F.E., and arm 43 of phosphorbronze. Gears may be used to move the wiper arm, or it may be moved manually. An indicating scale may be included (Fig. 1, not shown).
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 89. 发明专利
      GB1210580A IMPROVEMENTS IN OR RELATING TO LAYER RESISTANCE ELEMENTS FOR VOLTAGE DIVIDERS 未知
    • IMPROVEMENTS IN OR RELATING TO LAYER RESISTANCE ELEMENTS FOR VOLTAGE DIVIDERS
    • GB1210580A
    • 1970-10-28
    • GB5613468
    • 1968-11-26
    • PREH ELEKTRO FEINMECHANIK , WALTER PREH
    • H01C10/16 , H01C10/20 , H01C10/22 , H01C10/48 , H01C17/22
    • 1,210,580. Variable resistors. WALTER PREH [trading as PREH ELEKTROFEINMECHANISCHE WERKE JACOB PREH NACHFOLGER]. 26 Nov., 1968 [1 Dec., 1967; 20 Feb., 1968; 10 April, 1968], No. 56134/68. Heading H1S. A resistance element for a variable voltage divider comprises resistive material on a substrate, the element being divided into sections by transverse conductive strips C, D, G, each section including a main resistance part B and a shunt resistance part N, the main resistance parts presenting a wiper path S and the shunt resistance parts being adjusted so that each section resistance is matched to the values given by a voltage characteristic curve. Tolerances of less than 2 per cent can be achieved, whereby the voltage divider is suitable for tuning HF circuits by varying the blocking voltage of variale capacitance diodes. Conductive strips C, D, G are as thin as possible to avoid step changes in voltage, and may be interrupted in the region of the wiper path S. As shown, for a voltage divider having a non-lever characteristic curve further parallel resistances P I , P II and P III may be included, the latter being integral with shunt resistance N III . Adjustment of the shunt resistances may be achieved by removal of resistive material by scoring along the dashed line, preferably by a motor driven tool controlled by a resistance measurement device so that it stops when the correct trimming has taken place. Alternatively, the shunt resistances may be short circuited by a conductive strip along one edge, and the resistances increased by removal of this strip (Fig. 2, not shown). The resistance element may be circular (Fig. 4, not shown) or a multiple divider may have common conductive cross-pieces and the thus parallel-connected sections have common trimmable shunt resistances (Fig. 6, not shown). The circular element is shown as having a further track and shunt section at the initial terminal to give a base-point resistance matchable to an exact fraction of the total voltage. In a modification (Figs. 8, 9, not shown) the track resistance of every second section has its own wiper for independent variation so that the divider has a number of continuously adjustable stepped voltages.
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