EP0045546B1 - Device for controlling the rotation of a shaft through a preselected angle - Google Patents
Device for controlling the rotation of a shaft through a preselected angle Download PDFInfo
- Publication number
- EP0045546B1 EP0045546B1 EP81200826A EP81200826A EP0045546B1 EP 0045546 B1 EP0045546 B1 EP 0045546B1 EP 81200826 A EP81200826 A EP 81200826A EP 81200826 A EP81200826 A EP 81200826A EP 0045546 B1 EP0045546 B1 EP 0045546B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- free
- lever
- shaft
- wheel
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3005—Charging means
- H01H3/3021—Charging means using unidirectional coupling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H2003/3063—Decoupling charging handle or motor at end of charging cycle or during charged condition
Definitions
- This invention relates to a device for controlling the rotation of a shaft through a preselected angle narrower than 360°. More particularly, this device is intended to be employed in an electric switch for loading the closure springs thereof.
- closure springs act between a fixed point of the switch casing and a disc integral with a shaft which, through appropriate linkages, actuates the movable contacts of the switch concerned.
- the angle through which the shaft must be rotated to bring the springs from the unloaded condition to the condition of maximum load must be very accurate if it is desired that the springs may reliably attain the loading position and, if it is desired, on the other hand, that the stopping abutment be, in turn, not too heavily loaded as to make its unlatching by a preselected force too difficult at the prescribed instant of time.
- a conventional control device of this kind generally comprises two free-wheels secured to the shaft which must be rotated and at least a lever actuated by appropriate motive means for being reciprocated along a virtually rectilinear path and capable of acting upon either free-wheel to cause the shaft to be rotated through a small angle during its advance stroke, whereas during the return stroke of the lever the second free-wheel prevents the return rotation of the shaft.
- two levers can be provided, each of which is associated to each free-wheel and acting with a phase shift on the free-wheel in such a way that, when either lever goes along an advance stroke, the other goes along its return stroke.
- the motive means are stopped but, due to their inertia, they cannot be stopped instantaneously and can thus bring about a further rotation of the shaft and originate the shortcomings indicated above. Another possibility is that the motive means are stopped too early.
- An object of the present invention is to provide a control device for the rotation of a shaft through a preselected angle which is capable of reliably carrying out the stoppage of the shaft as soon as the desired angle of rotation is attained even if the motive means cannot be stopped instantaneously.
- the device which comprises two free- wheels mounted on the shaft to be rotated, each keyed to said shaft with a center part, at least one thrust lever connected between a peripheral ring of either free-wheel, whereby said ring is rotatable in two directions, and motive means adapted to impress to said lever a predominantly rectilinear reciprocating motion, characterised in that the connection between the thrust lever and the peripheral ring of the respective free-wheel is provided with a pin integral with the ring and engaged by an arcuate slot formed in the vicinity of the lever free-wheel end, that the general orientation of said slot is in a direction which forms with the predominantly rectilinear direction of motion of the lever an angle wider than 90° and narrower than 180° and that parallel to the respective free-wheel a circular disc is keyed to the shaft, the peripheral surface of said disc being adapted to have the free-wheel end of the lever abutting thereon, said disc having at a preselected angular position a hollow space in its peripheral surface and being
- the thrust lever in its advance stroke, can transfer its drive to the pin integral with the free-wheel only if its end rests on the periphery of the disc integral with the shaft, whereas, as soon as this contact is discontinued because the depressed hollow space is reached, the thrust lever, while being permitted to continue its reciprocations, cannot drive to rotation any longer the outer ring of the free-wheel, so that the shaft is reliably stopped in the desired angular position as determined by the location of said hollow space.
- the disc can be made as an entity with the driven portion of the free-wheel(s) which is integral with the shaft to be rotated.
- the device is shown only diagrammatically in the drawings but in a manner which is sufficient to make its operability understandable and to indicate the means necessary for such operability.
- the subject matter is the application of the device to an electric switch (not shown because it is not a part of the invention) for loading the closing spring(s) of the switch in question. It is understood, at any rate, that the device can find profitable uses in other cases in which a shaft must be rotated, starting from an angular starting position, along a single sense of rotation and through a preselected angle narrower than 360°.
- a device of the kind referred to herein generally comprises two free-wheels, generally indicated at 10, 11 and mounted on the shaft 12 which must be rotated in the direction of the arrow 13 about its axis through a preselected angle which is narrower than 360° from a preselected starting position.
- the free-wheels 10, 11 are equal to one another and their construction is conventional. It is sufficient to note that each of them comprises a part 14 keyed to the shaft 12 (indicated in dotted lines in FIGURES 1 and 3), said part 14 has, formed peripherally thereof, wedge-shaped hollow spaces 15, in each of which a friction roller, 16, is freely inserted. Around such a port 14, with the rollers 16 inserted in the wedge-shaped seatings 15, a ring 17 is mounted with its actuation arm 18.
- the ring 17 is rotated in a direction (corresponding to the direction 13 in which it is desired to have the shaft 12, whereon the free-wheel is mounted, driven to rotation) so that the rollers 16 are caused to roll along the thrust into the restricted section of their wedge-shaped seatings 15, the rotary motion, through said rollers 16 is transferred to the part 14 keyed to the shaft 12, so that these latter are driven to rotation. If, conversly, the ring 17 is rotated in the reverse direction, the rollers 16 are positioned in the deeper portion of their seatings 15 and cannot transfer their drive to the port 14: in this direction of rotation the ring 17 turns idly.
- the device provides, in the case in point, two levers 19, 20, which are connected, in a manner which will be explained in more detail hereinafter, to the actuation arms 18 of the respective freewheels 10, 11.
- the levers 19,20 are mounted on two eccentrics 21, 22, which are keyed, with an angular shift of 180° relative to one another, to a drive shaft 23 actuated by a motive unit 24 so as to be rotated always in the same direction of rotation.
- the two levers 19, 20 are driven to a virtually rectilinear reciprocating motion and, while either lever is advanced, the other is pushed backwards, and vice versa.
- a device such as described hereinbefore is already known.
- the control lever(s) was merely pivoted to the actuation arms of the respective free-wheels.
- the free-wheels are necessarily actuated not only until such time as the motive unit is active, but until such time as it is finally stopped after a transitional inertial motion period which is started at the instant of time when the motive unit is switched off.
- the actual angle by which the shaft was caused to be rotated with the known device could not accurately established beforehand.
- the object of the imporovements provided by the present invention is exactly to offset this defect.
- the arm 18 carries a pin 25 and the thrust lever 20, rather than being merely pivoted about such pin, displays a slot 26 in which the pin 25 is engaged.
- the slot 26 is arcuate but its general orientation is in a direction which forms with the predominantly rectilinear direction of motion of the lever 20 an angle, which is indicated with alpha in FIGURE 1 and which, in any case, must be wider than 90° and narrower than 180°.
- a circular disc 28 is provided, having a peripheral cylindrical track 29, the disc being keyed to the shaft 12.
- the free end of the lever 20 is prevented from being lowered so that it transfers the thrust onto the pin 25 which is engaged by its slot 26, so that, when the lever is moved forward in the direction of the arrow 27, the ring 17 of the free-wheel is rotated in the direction of the arrow 13 and, through the rollers 16 transfers the rotary drive to the part 14 and thus to the shaft 12.
- the unitary angle of rotation is a function of the forward stroke of the lever 20 as originated by the eccentric 22.
- the disc 28 and its track 29 have, in the desired angular position, a hollow space 30.
- the lever 20 is biased by a spring 31 which tends to lift the lever itself.
- a single disc 28 with a cylindrical track 29 and a hollow space 30 may serve for both levers, said disc being keyed to the shaft 12 to be rotated, between the two free-wheels 10, 11. From the constructional standpoint, the disc 28 can also be made so as to make up an entity with the parts 14 of the free-wheels which are secured to the shaft.
- the depth of the hollow space 30 in the disc 28, the shape of the slot 26 in the levers 19, 20 and the reciprocation stroke of the latter must be properly coordinated with each other in order that a correct operation of the device may be obtained.
- the slots 26 must be such as to make possible, when the relative pins 25 are in desired end of stroke position, to carry out the entire stroke of the respective levers 19, 20 without any interferences, either upwards and downwards.
- the hollow space 30 must be so shaped as to be capable of receiving in its interior the free ends of the levers 19, 20 during their idle runs without any interferences.
- FIGURES 4 and 5, read together with FIGURE 2, show the application of the device for loading the closing spring of an electric switch.
- FIGURES 2 and 4 are illustrative of the condition in which the spring 36 is unloaded, because the point 38 wherein the spring 36 is secured to the disc 33 is situated, relative to the axis of rotation of the disc, on the same side as the fixed anchoring point 37.
- preload the spring 36 it is necessary to have the shaft 12 and the disc 33 rotated, for example, in the direction of the arrow 13, so as to bring the point 38 to the opposite side of the axis of rotation relative to the fixed point 37.
- the advantage achieved by the device according to this invention is important. Inasmuch that a preselected total angle of rotation is warranted (in the case in point slightly wider than 180°) of the shaft 12 as being rotated by the device, it is sure that the spring 36 may reach the correct preloading position and that the disc 33 is not stopped, possibly, at a position wherein the line conjoining the points 37, 38 where the spring is fastened, has not overtaken the center of rotation: if so, the result would be a rotation of the shaft 12 in a direction contrary to the expected one as the spring 36 is cleared, that is as the stopping abutment 39 is removed.
- the stopping aubutment 39 is prevented from being loaded too much and becoming too heavily wedged between the cam profile 34 and the roller 35, thus making difficult, or even impossible, to clear it with the required force. Such an event could occur if the shaft 12 should be rotated by the device which controls its rotation through an angle wider than the preselected width.
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- Transmission Devices (AREA)
- Mechanical Control Devices (AREA)
Description
- This invention relates to a device for controlling the rotation of a shaft through a preselected angle narrower than 360°. More particularly, this device is intended to be employed in an electric switch for loading the closure springs thereof.
- These closure springs act between a fixed point of the switch casing and a disc integral with a shaft which, through appropriate linkages, actuates the movable contacts of the switch concerned.
- When the line conjoining said fixed point and the point at which the springs are fastened to the disc integral with the shaft passes through the axis of the shaft and the point where the springs are attached to the disc are situated, relative to the shaft, on the same side as the fixed point, the springs are unloaded and, to load them, it is required that the shaft and the disc be rotated through an angle which is slightly wider than 180° and that the disc be latched in such a position, in which the springs are loaded to a maximum. To have the movable contacts snapping into the closure position, the disc must be unlatched, so that the springs are set free and can display their bias thus snappingly rotating the disc and the shaft towards their starting position.
- It is apparent that the angle through which the shaft must be rotated to bring the springs from the unloaded condition to the condition of maximum load must be very accurate if it is desired that the springs may reliably attain the loading position and, if it is desired, on the other hand, that the stopping abutment be, in turn, not too heavily loaded as to make its unlatching by a preselected force too difficult at the prescribed instant of time.
- Inasmuch as the rotation of the shaft during the spring loading stage requires not negligible forces, there is used to control such a rotation a device which causes the shaft to be rotated stepwise through sequentially ordered small angles until reaching the preselected total angle. A conventional control device of this kind generally comprises two free-wheels secured to the shaft which must be rotated and at least a lever actuated by appropriate motive means for being reciprocated along a virtually rectilinear path and capable of acting upon either free-wheel to cause the shaft to be rotated through a small angle during its advance stroke, whereas during the return stroke of the lever the second free-wheel prevents the return rotation of the shaft. Also two levers can be provided, each of which is associated to each free-wheel and acting with a phase shift on the free-wheel in such a way that, when either lever goes along an advance stroke, the other goes along its return stroke.
- As the preselected total angle of rotation for the shaft is attained, the motive means are stopped but, due to their inertia, they cannot be stopped instantaneously and can thus bring about a further rotation of the shaft and originate the shortcomings indicated above. Another possibility is that the motive means are stopped too early.
- An object of the present invention is to provide a control device for the rotation of a shaft through a preselected angle which is capable of reliably carrying out the stoppage of the shaft as soon as the desired angle of rotation is attained even if the motive means cannot be stopped instantaneously.
- This object is achieved by the device according to the invention which comprises two free- wheels mounted on the shaft to be rotated, each keyed to said shaft with a center part, at least one thrust lever connected between a peripheral ring of either free-wheel, whereby said ring is rotatable in two directions, and motive means adapted to impress to said lever a predominantly rectilinear reciprocating motion, characterised in that the connection between the thrust lever and the peripheral ring of the respective free-wheel is provided with a pin integral with the ring and engaged by an arcuate slot formed in the vicinity of the lever free-wheel end, that the general orientation of said slot is in a direction which forms with the predominantly rectilinear direction of motion of the lever an angle wider than 90° and narrower than 180° and that parallel to the respective free-wheel a circular disc is keyed to the shaft, the peripheral surface of said disc being adapted to have the free-wheel end of the lever abutting thereon, said disc having at a preselected angular position a hollow space in its peripheral surface and being adapted to receive the lever free-wheel end therein, whereby resilient means bias the lever free-wheel end away from the bottom of said hollow space.
- By the device according to this invention, the result is that the thrust lever, in its advance stroke, can transfer its drive to the pin integral with the free-wheel only if its end rests on the periphery of the disc integral with the shaft, whereas, as soon as this contact is discontinued because the depressed hollow space is reached, the thrust lever, while being permitted to continue its reciprocations, cannot drive to rotation any longer the outer ring of the free-wheel, so that the shaft is reliably stopped in the desired angular position as determined by the location of said hollow space.
- Of course, if respective thrust levers are associated to both free-wheels, the connection between these and the outer rings of the free- wheels must be embodied just in the same way as hereinbefore described for the case of a single lever. If so, the circular disc and its respective hollow space may be used for both thrust levers.
- In both cases, the disc can be made as an entity with the driven portion of the free-wheel(s) which is integral with the shaft to be rotated.
- The foregoing and other features of the control device according to the invention and the advantages stemming therefrom will become apparent in greater detail from the ensuing description of an exemplary embodiment thereof given with reference to the accompanying drawings, wherein:
- FIGURE 1 is a side elevational view of a device having two free-wheels and two respective actuation levers,
- FIGURE 2 is a plan view of the same device,
- FIGURE 3 is a view akin to that of FIGURE 1 but with the device in the end of stroke position, and
- FIGURES 4 and 5 diagrammatically show the closing spring of a switch to which the device in question has been applied, in the unloaded and the loaded configuration, respectively.
- The device is shown only diagrammatically in the drawings but in a manner which is sufficient to make its operability understandable and to indicate the means necessary for such operability.
- In the example shown herein, by way of example, the subject matter is the application of the device to an electric switch (not shown because it is not a part of the invention) for loading the closing spring(s) of the switch in question. It is understood, at any rate, that the device can find profitable uses in other cases in which a shaft must be rotated, starting from an angular starting position, along a single sense of rotation and through a preselected angle narrower than 360°.
- A device of the kind referred to herein generally comprises two free-wheels, generally indicated at 10, 11 and mounted on the
shaft 12 which must be rotated in the direction of thearrow 13 about its axis through a preselected angle which is narrower than 360° from a preselected starting position. - The free-
wheels part 14 keyed to the shaft 12 (indicated in dotted lines in FIGURES 1 and 3), saidpart 14 has, formed peripherally thereof, wedge-shapedhollow spaces 15, in each of which a friction roller, 16, is freely inserted. Around such aport 14, with therollers 16 inserted in the wedge-shaped seatings 15, aring 17 is mounted with itsactuation arm 18. - The operation of such a free-wheel mechanism is as follows.
- If the
ring 17 is rotated in a direction (corresponding to thedirection 13 in which it is desired to have theshaft 12, whereon the free-wheel is mounted, driven to rotation) so that therollers 16 are caused to roll along the thrust into the restricted section of their wedge-shaped seatings 15, the rotary motion, through saidrollers 16 is transferred to thepart 14 keyed to theshaft 12, so that these latter are driven to rotation. If, conversly, thering 17 is rotated in the reverse direction, therollers 16 are positioned in the deeper portion of theirseatings 15 and cannot transfer their drive to the port 14: in this direction of rotation thering 17 turns idly. - In view of the foregoing, the device provides, in the case in point, two
levers actuation arms 18 of therespective freewheels levers eccentrics drive shaft 23 actuated by amotive unit 24 so as to be rotated always in the same direction of rotation. - Thus, the two levers 19, 20 are driven to a virtually rectilinear reciprocating motion and, while either lever is advanced, the other is pushed backwards, and vice versa.
- The result is that, apart from the dead ends of the stroke, at every instant the ring of either free-wheel is rotated in the direction of the
arrow 13, whereas, at the same time, the ring of the other free-wheel is rotated in the reverse direction. The ring which is rotated in the direction of thearrow 13 drives to rotation theshaft 12 in the same direction, whereas the ring which is rotated in the reverse direction turns idly. - It is apparent that two free-wheels are required: as a matter of fact, in the idle rotation stage of the ring of either free-wheel, the shaft could concurrently be rotated backwards, especially when so urged by an external force, unless it is retained in the angular position it has reached, or even thrust farther on in the desired direction of rotation by the agency of the second free-wheel. In the former case, a second free-wheel is enough, the idle ring of which is held steady by an appropriate connection with a fixed structure. The second case, instead, is the one considered in the example shown in the drawings, wherein the second free-wheel also is equipped with its respective control lever and thus actively contributes towards the shaft advance.
- A device such as described hereinbefore is already known. In such a conventional device the control lever(s) was merely pivoted to the actuation arms of the respective free-wheels. Thus, the free-wheels are necessarily actuated not only until such time as the motive unit is active, but until such time as it is finally stopped after a transitional inertial motion period which is started at the instant of time when the motive unit is switched off. As a result, the actual angle by which the shaft was caused to be rotated with the known device could not accurately established beforehand.
- The object of the imporovements provided by the present invention is exactly to offset this defect.
- These improvements essentially consist of a particular connection between the control or thrust levers, 19, 20 and the actuating
arms 18 of the respective free-wheels wheel 10 will be described hereinafter. - As best seen in the drawings, the
arm 18 carries apin 25 and thethrust lever 20, rather than being merely pivoted about such pin, displays aslot 26 in which thepin 25 is engaged. Theslot 26 is arcuate but its general orientation is in a direction which forms with the predominantly rectilinear direction of motion of thelever 20 an angle, which is indicated with alpha in FIGURE 1 and which, in any case, must be wider than 90° and narrower than 180°. - As a result of this connection between the
lever 20 and thearm 18, when thethrust lever 20 is moved forward in the direction of the arrow 27, it tends, with its free end, to be depressed, that is, to approach the free-wheel 10 without pushing forward thepin 25 and thus also thearm 18 integral with thering 17 in the direction of thearrow 13. For having the thrust transferred to thepin 25, it is required that the free end of thelever 20 may find an abutment which prevents its depression. - To this purpose, beside the free-wheel 10 a
circular disc 28 is provided, having a peripheralcylindrical track 29, the disc being keyed to theshaft 12. By virtue of the presence of such acylindrical track 29, the free end of thelever 20 is prevented from being lowered so that it transfers the thrust onto thepin 25 which is engaged by itsslot 26, so that, when the lever is moved forward in the direction of the arrow 27, thering 17 of the free-wheel is rotated in the direction of thearrow 13 and, through therollers 16 transfers the rotary drive to thepart 14 and thus to theshaft 12. The unitary angle of rotation is a function of the forward stroke of thelever 20 as originated by the eccentric 22. - This forward rotation in the desired direction is continued in small sequential steps, with the
motive unit 24 in action, until the free end of thelever 20 can rest on thecylindrical track 29. - To discontinue the forward rotation of the
shaft 12 irrespective of the stoppage of themotive unit 24, it is sufficient to remove the supporting surface for the free end of the control lever. - To this purpose, the
disc 28 and itstrack 29 have, in the desired angular position, ahollow space 30. - As soon as the
shaft 12 and itsdisc 28 integral therewith have been rotated, starting from a certain starting angular position, through a total angle such that the free end of thethrust lever 20 enters thehollow space 30 and thus does no longer rest on thetrack 29 of thedisc 28, it is no longer possible to transfer the drive from thelever 20 to thearm 18 of thering 17 of the free-wheel so that the lever carries out an idle stroke. Theshaft 12 is automatically stopped in the desired angular position, whereas thelever 20 can be moved forward idly until themotive unit 24 is finally stopped. - To prevent the free end of the
lever 20 from falling due to its own weight down to the bottom of thehollow space 30, thelever 20 is biased by aspring 31 which tends to lift the lever itself. - What has been described above with reference to the
free wheel 10 and to itscontrol lever 20 is identically valid for the free-wheel 11 and itsrelevant control lever 19, but the reciprocating motion of the latter takes place in a sense which is opposite to that of thelever 20. - In the example shown of two control levers 19, 20, a
single disc 28 with acylindrical track 29 and ahollow space 30 may serve for both levers, said disc being keyed to theshaft 12 to be rotated, between the two free-wheels disc 28 can also be made so as to make up an entity with theparts 14 of the free-wheels which are secured to the shaft. - Obviously, in the practical construction of the device as described above, the depth of the
hollow space 30 in thedisc 28, the shape of theslot 26 in thelevers - More particularly, the
slots 26 must be such as to make possible, when therelative pins 25 are in desired end of stroke position, to carry out the entire stroke of therespective levers hollow space 30 must be so shaped as to be capable of receiving in its interior the free ends of thelevers - FIGURES 4 and 5, read together with FIGURE 2, show the application of the device for loading the closing spring of an electric switch.
- The
shaft 12 on which the control device is active, carried, keyed thereto, twodiscs cam 34 having an appropriate outline and anidle follower 35. To apoint 38 of thedisc 33 is anchored either end of aspring 36 to be preloaded, the other end of which is secured to a fixedpoint 37. FIGURES 2 and 4 are illustrative of the condition in which thespring 36 is unloaded, because thepoint 38 wherein thespring 36 is secured to thedisc 33 is situated, relative to the axis of rotation of the disc, on the same side as the fixedanchoring point 37. To preload thespring 36, it is necessary to have theshaft 12 and thedisc 33 rotated, for example, in the direction of thearrow 13, so as to bring thepoint 38 to the opposite side of the axis of rotation relative to the fixedpoint 37. - In order that the
spring 36 may, at a later time, cause thedisc 33 and thus also theshaft 12 to be rotated just by spring bias still in the same direction as thearrow 13, it is required that the line conjoining thepoints - In this position, the
spring 36 is preloaded substantially to the most and it is necessary to provide to latch theshaft 12 on completion of the preloading step. To this purpose, astop 39 is provided, which, entering an appropriate hollow space of the profile of thecam 34, is intended to abut the idle follower 35 (see FIGURE 5). To clear thespring 36, it suffices, then, properly to shift this abutment 39 (see position of FIGURE 4). - It is apparent that the advantage achieved by the device according to this invention is important. Inasmuch that a preselected total angle of rotation is warranted (in the case in point slightly wider than 180°) of the
shaft 12 as being rotated by the device, it is sure that thespring 36 may reach the correct preloading position and that thedisc 33 is not stopped, possibly, at a position wherein the line conjoining thepoints shaft 12 in a direction contrary to the expected one as thespring 36 is cleared, that is as the stoppingabutment 39 is removed. - In addition, the stopping
aubutment 39 is prevented from being loaded too much and becoming too heavily wedged between thecam profile 34 and theroller 35, thus making difficult, or even impossible, to clear it with the required force. Such an event could occur if theshaft 12 should be rotated by the device which controls its rotation through an angle wider than the preselected width.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81200826T ATE9854T1 (en) | 1980-07-31 | 1981-07-20 | DEVICE FOR CONTROLLING THE ROTATIONAL MOVEMENT OF A SHAFT AT A PRESELECTED ANGLE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2384480 | 1980-07-31 | ||
IT8023844A IT1209249B (en) | 1980-07-31 | 1980-07-31 | COMMAND DEVICE FOR THE ROTATION OF A SHAFT OF A PRESET CORNER. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0045546A2 EP0045546A2 (en) | 1982-02-10 |
EP0045546A3 EP0045546A3 (en) | 1982-02-17 |
EP0045546B1 true EP0045546B1 (en) | 1984-10-10 |
Family
ID=11210367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81200826A Expired EP0045546B1 (en) | 1980-07-31 | 1981-07-20 | Device for controlling the rotation of a shaft through a preselected angle |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0045546B1 (en) |
AR (1) | AR227197A1 (en) |
AT (1) | ATE9854T1 (en) |
BR (1) | BR8104939A (en) |
DE (1) | DE3166600D1 (en) |
IT (1) | IT1209249B (en) |
NZ (1) | NZ197890A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3627508C1 (en) * | 1986-08-13 | 1987-10-22 | Sachsenwerk Ag | Clamping device for the energy storage of an electrical switch |
EP1665304B1 (en) | 2003-09-13 | 2007-06-27 | ABB Technology AG | Device for actuating an electrical switchgear |
GB2557582A (en) | 2016-09-14 | 2018-06-27 | Eaton Ind Netherlands Bv | Mechanism for opening and closing a circuit breaker |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1179601A (en) * | 1957-07-18 | 1959-05-27 | Merlin Gerin | Stored energy control, especially for switches |
CH417270A (en) * | 1962-07-09 | 1966-07-15 | Sig Schweiz Industrieges | Gearbox with infinitely variable transmission ratio |
BE625880A (en) * | 1963-01-22 | |||
DE7143984U (en) * | 1971-11-23 | 1972-02-03 | Siemens Ag | Drive for an electrical power switch |
-
1980
- 1980-07-31 IT IT8023844A patent/IT1209249B/en active
-
1981
- 1981-07-20 DE DE8181200826T patent/DE3166600D1/en not_active Expired
- 1981-07-20 EP EP81200826A patent/EP0045546B1/en not_active Expired
- 1981-07-20 AT AT81200826T patent/ATE9854T1/en active
- 1981-07-30 BR BR8104939A patent/BR8104939A/en unknown
- 1981-07-30 AR AR286283A patent/AR227197A1/en active
- 1981-07-30 NZ NZ197890A patent/NZ197890A/en unknown
Also Published As
Publication number | Publication date |
---|---|
IT8023844A0 (en) | 1980-07-31 |
EP0045546A3 (en) | 1982-02-17 |
NZ197890A (en) | 1984-09-28 |
AR227197A1 (en) | 1982-09-30 |
BR8104939A (en) | 1982-04-20 |
DE3166600D1 (en) | 1984-11-15 |
ATE9854T1 (en) | 1984-10-15 |
IT1209249B (en) | 1989-07-16 |
EP0045546A2 (en) | 1982-02-10 |
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