US20020163261A1 - Electric motor having a no-adjust starting switch - Google Patents
Electric motor having a no-adjust starting switch Download PDFInfo
- Publication number
- US20020163261A1 US20020163261A1 US09/850,226 US85022601A US2002163261A1 US 20020163261 A1 US20020163261 A1 US 20020163261A1 US 85022601 A US85022601 A US 85022601A US 2002163261 A1 US2002163261 A1 US 2002163261A1
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- US
- United States
- Prior art keywords
- electric motor
- switch
- actuator button
- housing
- arms
- 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.)
- Granted
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/23—Mechanically-actuated centrifugal switches
Definitions
- the present invention relates generally to electric motors incorporating a centrifugal governor mounted to a rotor shaft of the motor, and a starting switch which is allowed to open or close depending on the rotational speed of the rotor shaft.
- the starting switch assembly 10 includes a bracket 18 mounted to the motor end frame 22 with a mounting screw 26 , a switch plate 30 mounted to the bracket 18 , and a pair of elongated arms or terminal blades 34 and 38 which are supported by switch plate 30 and each of which includes an associated electric contact 42 and 46 .
- An actuator button 50 is attached to arm 34 .
- the governor assembly 14 includes a spring 52 and a pivot plate 54 , and the governor assembly 14 is mounted to the rotor shaft 58 .
- the spring 52 causes the pivot plate 54 to contact the actuator button 50 to force the arms 34 and 38 and, therefore, the contacts 42 and 46 , together to close the electric switch.
- centrifugal forces acting on the pivot plate 54 overcome the force of the spring 52 and cause the pivot plate 54 to pivot in a direction (i.e., a counterclockwise direction as shown in FIG. 9) which allows the actuator button 50 to move in a direction that enables the arms 34 and 38 and, therefore, the contacts 42 and 46 , to separate to open the electric switch.
- the spring 52 causes the pivot plate 54 to push the actuator button 50 away from the end 62 of the shaft 58 , such that the bottom surface 66 of the actuator button 50 is not perpendicular to the centerline 70 of the shaft 58 .
- the governor assembly 14 spins with the rotor shaft 58 .
- the spinning action of the governor assembly 14 and the non-perpendicular engagement between the pivot plate 54 and the bottom surface 66 of the actuator button 50 can cause the actuator button 50 to wobble. Wobbling of the actuator button 50 can result in intermittent arcing between the electric contacts 42 and 46 .
- the present invention provides an electric motor which includes a “no-adjust” starting switch.
- the starting switch according to the present invention does not require any reservation of the available stroke of a pivot plate of a governor assembly to offset wobbling of an actuator button because, for one reason, the actuator button is prevented from wobbling.
- One advantage of such an arrangement is that the entire available stroke of the pivot plate of the governor assembly can be used to offset the stack-up tolerances of the motor assembly.
- a switch actuator button remains substantially parallel to the centerline of a rotor shaft at all times. As a result, there is minimal wobbling of the actuator button during motor start-up and motor operation.
- the actuator button is not secured to either terminal blade of the starting switch, so that the actuator button is better able to stay substantially parallel to the centerline of the rotor shaft.
- the actuator button is constrained for movement parallel to or along the centerline of the rotor shaft to further ensure that the actuator button will not wobble during motor start-up and motor operation.
- a switch housing is provided to simplify the placement of the starting switch into the electric motor, and the switch housing includes an aperture through which the actuator button is slidably positioned, so that during rotation of the rotor shaft, the actuator button is constrained for movement along the centerline of the shaft.
- FIG. 1 is a perspective view of an electric motor embodying the present invention.
- FIG. 2 is an end view of the electric motor of FIG. 1 with an end cover removed.
- FIG. 3 is a perspective view of a starting switch assembly according to the present invention.
- FIG. 4 is an exploded view of the starting switch assembly of FIG. 3.
- FIG. 5 is a partial cross-sectional view of the starting switch assembly of FIG. 3 mounted to a motor end frame of the electric motor of FIG. 1.
- FIG. 6 is a perspective view of an actuator button of the starting switch assembly of FIG. 3.
- FIG. 7 is a bottom view of the actuator button of FIG. 6.
- FIG. 8 is a cross-sectional view of an alternative embodiment for mounting a starting switch assembly according to the present invention to the motor end frame of the electric motor of FIG. 1.
- FIG. 9 is a plan view of a prior known starting switch assembly mounted to a motor end frame of an electric motor.
- FIG. 1 Illustrated in FIG. 1 is an electric motor 100 embodying the invention. It should be understood that the present invention is capable of use in other electric motors and the electric motor 100 is merely shown and described as an example of one such motor.
- the motor 100 includes a housing 104 having an axis 108 , a stator 112 supported by the housing 104 , a shaft 58 supported by the housing 104 for rotation about the axis 108 , and a rotor 120 supported by the shaft 58 for rotation therewith relative to the stator 112 .
- an end cover 124 is attached to the motor end frame 128 to surround a starting switch assembly 132 , which is described in greater detail below, and other components.
- the motor 100 further includes a governor assembly 14 secured to end 62 of the shaft 58 , the governor assembly 14 including a spring 52 and a pivot plate 54 , as previously described.
- the starting switch assembly 132 includes a pair of flexible, elongated arms or terminal blades 136 and 144 .
- Arm 136 includes an electrical contact 148 and arm 144 includes an electrical contact 152 .
- spring 52 causes the pivot plate 54 to engage an actuator button 168 of the starting switch assembly 132 to force the arms 136 and 144 and, therefore, the contacts 148 and 152 , together to close the starting switch.
- Ledge 180 is slightly raised above ledge 172 to ensure the separation of the arms 136 and 144 when the arms 136 and 144 rest on the ledges 172 and 180 .
- arm 136 is secured to the switch housing 176 by rivet 184 and arm 144 is secured to switch housing 176 by rivet 188 .
- Slot 190 of the switch housing 176 receives the terminal portion 192 of arm 136 and slot 196 of the switch housing 176 receives the terminal portion 200 of arm 144 , so as to properly locate the arms 136 and 144 on the switch housing 176 .
- the switch housing 176 includes openings 202 for receiving and guiding electrical wires or the like connected to the terminal portions 192 and 200 , thereby inhibiting the electrical wires from tangling with moving components of the motor 100 . As shown in FIG.
- terminal blade 136 of the starting switch assembly 132 is electrically coupled to a capacitor 140 via wire 203 (although, it should be noted that capacitor 140 is not utilized in all electric motors in which the present invention can be employed), and the other terminal blade 144 of the starting switch assembly 132 is electrically coupled to a start winding (not shown) as conventionally understood.
- a feature of the present invention is that unlike the starting switch assembly 10 of FIG. 9, the actuator button 168 of the starting switch assembly 132 is substantially prevented from wobbling.
- the axis 108 of the shaft 58 extends through the actuator button 168 , and the actuator button 168 moves along the axis 108 during rotation of the shaft 58 .
- the actuator button 168 includes a substantially flat surface 204 which is generally perpendicular to the axis 108 and which engages the pivot plate 54 .
- the actuator button 168 further includes a hemispherical dome 208 (FIG. 6) that engages arm 136 during start-up of the motor and until at least the rotation of the shaft 58 reaches the predetermined rotation.
- the actuator button 168 is slidably positioned within an aperture 212 of the switch housing 176 so that the actuator button 168 is substantially constrained for movement along the axis 108 , i.e., the surface 204 remains substantially perpendicular to the axis 108 as the actuator button 168 moves along the axis 108 .
- the actuator button 168 includes a generally non-cylindrical body 216 (FIGS. 6 and 7) which is matingly received by the aperture 212 of the switch housing 176 , so that during rotation of the shaft 58 , the actuator button 168 is prevented from spinning within the aperture 212 . As the shaft 58 rotates, the pivot plate 54 moves about the axis 108 .
- the actuator button 168 is constrained to move along the axis 108 , the surface 204 of the actuator button 168 remains substantially perpendicular to the axis 108 and the engagement between the pivot plate 54 and the surface 204 will not cause the actuator button 168 to appreciably wobble.
- the switch housing 176 is mounted to the end frame 128 and, therefore the housing 104 , by screw 220 extending through an aperture 224 (FIG. 4) in the switch housing 176 and then into the end frame 128 .
- the screw 220 includes a conical shoulder 228 (FIG. 4) and the aperture 224 is configured to receive the conical shoulder 228 of the screw 220 .
- the screw 220 is self-aligning with respect to the switch housing 176 when mounting the switch housing 176 to the end frame 128 .
- An alternative self-aligning arrangement is shown in FIG.
- the aperture 224 ′ is configured to include an upper portion 228 having a larger diameter than the screw 220 ′ to provide clearance therebetween, and a lower portion 232 having a slightly smaller diameter than the screw 220 ′ to provide a threaded fit between the screw 220 ′ and the lower portion 232 .
- the switch housing 176 ′ is made of a plastic material and the lower portion 232 can be tapped with a standard hex-head machine screw 220 ′.
- the switch housing 176 further includes an outwardly projecting wall 236 positioned adjacent to and extending along the arms 136 and 144 to protect the arms 136 and 144 from damage and to act as a shield to contain any arcing which may be transmitted by the arms 136 and 144 .
- the switch housing 176 includes a first opening 240 positioned below arm 136 and a second opening 244 positioned below arm 144 . The openings 240 and 244 reduce the accumulation of sand, dirt or other undesirable contaminants below the arms 136 and 144 , that if occurs, could adversely affect the operation of the starting switch.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
- The present invention relates generally to electric motors incorporating a centrifugal governor mounted to a rotor shaft of the motor, and a starting switch which is allowed to open or close depending on the rotational speed of the rotor shaft.
- Many electric motors include governor assemblies which react to changes in the rotational speed of a rotor shaft to open and close an electric switch. Centrifugal governors generally utilize the centrifugal force generated by rotation of the shaft to engage and disengage an electric starting switch. Illustrated in FIG. 9 is a known
starting switch assembly 10 andgovernor assembly 14. Thestarting switch assembly 10 includes abracket 18 mounted to the motor end frame 22 with amounting screw 26, aswitch plate 30 mounted to thebracket 18, and a pair of elongated arms orterminal blades switch plate 30 and each of which includes an associatedelectric contact actuator button 50 is attached toarm 34. Thegovernor assembly 14 includes aspring 52 and apivot plate 54, and thegovernor assembly 14 is mounted to therotor shaft 58. During the power off mode, and during start-up and until theshaft 58 reaches a predetermined rotational speed, thespring 52 causes thepivot plate 54 to contact theactuator button 50 to force thearms contacts shaft 58 reaches the predetermined rotational speed, centrifugal forces acting on thepivot plate 54 overcome the force of thespring 52 and cause thepivot plate 54 to pivot in a direction (i.e., a counterclockwise direction as shown in FIG. 9) which allows theactuator button 50 to move in a direction that enables thearms contacts - With continued reference to FIG. 9, during start-up and until the
shaft 58 reaches the predetermined rotational speed, thespring 52 causes thepivot plate 54 to push theactuator button 50 away from theend 62 of theshaft 58, such that thebottom surface 66 of theactuator button 50 is not perpendicular to thecenterline 70 of theshaft 58. As can be appreciated, during start-up and operation of the motor, thegovernor assembly 14 spins with therotor shaft 58. The spinning action of thegovernor assembly 14 and the non-perpendicular engagement between thepivot plate 54 and thebottom surface 66 of theactuator button 50 can cause theactuator button 50 to wobble. Wobbling of theactuator button 50 can result in intermittent arcing between theelectric contacts actuator button 50, it is known to utilize a significant portion of the available stroke or pivotal movement of thepivot plate 54 of thegovernor assembly 14. In this way, the engagement between thepivot plate 54 and theactuator button 50 prevents theelectric contacts actuator button 50 wobbles. It has been observed that a problem with using a significant portion of the available pivotal movement of thepivot plate 54 to offset the wobbling action of theactuator button 50 is that there may not be a sufficient amount of pivotal movement left for thepivot plate 54 to absorb the stack-up tolerances associated with assembly of the electric motor. In other words, during operation of the electric motor, after theshaft 58 has reached a predetermined rotational speed, there may not be a sufficient amount of stroke left in thepivot plate 54 so as to allow the electric starting switch to open, thereby resulting in possible damage to the starting switch or even the electric motor itself. For example, if a significant portion of the available stroke of thepivot plate 54 is reserved to offset the wobbling action of theactuator button 50, and the length of theshaft 58 is near the high end of the allowed tolerance range, after theshaft 58 reaches the predetermined rotational speed, thepivot plate 54 may not move a sufficient amount to allow theelectric contacts switch assembly 10 and thegovernor assembly 14. - To address the foregoing problems and other problems, the present invention provides an electric motor which includes a “no-adjust” starting switch. The starting switch according to the present invention does not require any reservation of the available stroke of a pivot plate of a governor assembly to offset wobbling of an actuator button because, for one reason, the actuator button is prevented from wobbling. One advantage of such an arrangement is that the entire available stroke of the pivot plate of the governor assembly can be used to offset the stack-up tolerances of the motor assembly.
- According to one aspect of the present invention, a switch actuator button remains substantially parallel to the centerline of a rotor shaft at all times. As a result, there is minimal wobbling of the actuator button during motor start-up and motor operation. In one embodiment of the present invention, the actuator button is not secured to either terminal blade of the starting switch, so that the actuator button is better able to stay substantially parallel to the centerline of the rotor shaft. In another embodiment of the present invention, the actuator button is constrained for movement parallel to or along the centerline of the rotor shaft to further ensure that the actuator button will not wobble during motor start-up and motor operation. Preferably, a switch housing is provided to simplify the placement of the starting switch into the electric motor, and the switch housing includes an aperture through which the actuator button is slidably positioned, so that during rotation of the rotor shaft, the actuator button is constrained for movement along the centerline of the shaft.
- Other features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims and drawings in which like numerals are used to designate like features.
- FIG. 1 is a perspective view of an electric motor embodying the present invention.
- FIG. 2 is an end view of the electric motor of FIG. 1 with an end cover removed.
- FIG. 3 is a perspective view of a starting switch assembly according to the present invention.
- FIG. 4 is an exploded view of the starting switch assembly of FIG. 3.
- FIG. 5 is a partial cross-sectional view of the starting switch assembly of FIG. 3 mounted to a motor end frame of the electric motor of FIG. 1.
- FIG. 6 is a perspective view of an actuator button of the starting switch assembly of FIG. 3.
- FIG. 7 is a bottom view of the actuator button of FIG. 6.
- FIG. 8 is a cross-sectional view of an alternative embodiment for mounting a starting switch assembly according to the present invention to the motor end frame of the electric motor of FIG. 1.
- FIG. 9 is a plan view of a prior known starting switch assembly mounted to a motor end frame of an electric motor.
- Before the embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of “including” and “comprising” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof.
- Illustrated in FIG. 1 is an
electric motor 100 embodying the invention. It should be understood that the present invention is capable of use in other electric motors and theelectric motor 100 is merely shown and described as an example of one such motor. Themotor 100 includes ahousing 104 having anaxis 108, astator 112 supported by thehousing 104, ashaft 58 supported by thehousing 104 for rotation about theaxis 108, and arotor 120 supported by theshaft 58 for rotation therewith relative to thestator 112. In conjunction with FIG. 2, anend cover 124 is attached to themotor end frame 128 to surround astarting switch assembly 132, which is described in greater detail below, and other components. Themotor 100 further includes agovernor assembly 14 secured toend 62 of theshaft 58, thegovernor assembly 14 including aspring 52 and apivot plate 54, as previously described. - With reference to FIG. 4, the
starting switch assembly 132 includes a pair of flexible, elongated arms orterminal blades Arm 136 includes anelectrical contact 148 andarm 144 includes anelectrical contact 152. Referring now to FIG. 5, during start-up of themotor 100 and until theshaft 58 reaches a predetermined rotational speed,spring 52 causes thepivot plate 54 to engage anactuator button 168 of thestarting switch assembly 132 to force thearms contacts shaft 58 has reached the predetermined rotational speed, centrifugal forces acting on thepivot plate 54 overcome the force of thespring 52 and cause thepivot plate 54 to pivot in a direction (i.e., a counterclockwise direction as shown in FIG. 5) which allows theactuator button 168 to move in a direction that enables thearms contacts arms arm 136 rests on a ledge 172 (FIG. 4) of a switch housing 176 (FIG. 4) of thestarting switch assembly 132, andarm 144 rests on a ledge 180 (FIG. 4) of theswitch housing 176.Ledge 180 is slightly raised aboveledge 172 to ensure the separation of thearms arms ledges - With reference to FIGS. 3 and 4,
arm 136 is secured to theswitch housing 176 byrivet 184 andarm 144 is secured to switchhousing 176 byrivet 188.Slot 190 of theswitch housing 176 receives theterminal portion 192 ofarm 136 andslot 196 of theswitch housing 176 receives theterminal portion 200 ofarm 144, so as to properly locate thearms switch housing 176. Theswitch housing 176 includesopenings 202 for receiving and guiding electrical wires or the like connected to theterminal portions motor 100. As shown in FIG. 2,terminal blade 136 of thestarting switch assembly 132 is electrically coupled to acapacitor 140 via wire 203 (although, it should be noted thatcapacitor 140 is not utilized in all electric motors in which the present invention can be employed), and the otherterminal blade 144 of thestarting switch assembly 132 is electrically coupled to a start winding (not shown) as conventionally understood. - A feature of the present invention is that unlike the
starting switch assembly 10 of FIG. 9, theactuator button 168 of thestarting switch assembly 132 is substantially prevented from wobbling. Referring again to FIG. 5, theaxis 108 of theshaft 58 extends through theactuator button 168, and theactuator button 168 moves along theaxis 108 during rotation of theshaft 58. Theactuator button 168 includes a substantiallyflat surface 204 which is generally perpendicular to theaxis 108 and which engages thepivot plate 54. Theactuator button 168 further includes a hemispherical dome 208 (FIG. 6) that engagesarm 136 during start-up of the motor and until at least the rotation of theshaft 58 reaches the predetermined rotation. Theactuator button 168 is slidably positioned within an aperture 212 of theswitch housing 176 so that theactuator button 168 is substantially constrained for movement along theaxis 108, i.e., thesurface 204 remains substantially perpendicular to theaxis 108 as theactuator button 168 moves along theaxis 108. Theactuator button 168 includes a generally non-cylindrical body 216 (FIGS. 6 and 7) which is matingly received by the aperture 212 of theswitch housing 176, so that during rotation of theshaft 58, theactuator button 168 is prevented from spinning within the aperture 212. As theshaft 58 rotates, thepivot plate 54 moves about theaxis 108. However, because theactuator button 168 is constrained to move along theaxis 108, thesurface 204 of theactuator button 168 remains substantially perpendicular to theaxis 108 and the engagement between thepivot plate 54 and thesurface 204 will not cause theactuator button 168 to appreciably wobble. - Referring back now to FIG. 2, the
switch housing 176 is mounted to theend frame 128 and, therefore thehousing 104, byscrew 220 extending through an aperture 224 (FIG. 4) in theswitch housing 176 and then into theend frame 128. Thescrew 220 includes a conical shoulder 228 (FIG. 4) and theaperture 224 is configured to receive theconical shoulder 228 of thescrew 220. In this way, thescrew 220 is self-aligning with respect to theswitch housing 176 when mounting theswitch housing 176 to theend frame 128. An alternative self-aligning arrangement is shown in FIG. 8, wherein theaperture 224′ is configured to include anupper portion 228 having a larger diameter than thescrew 220′ to provide clearance therebetween, and a lower portion 232 having a slightly smaller diameter than thescrew 220′ to provide a threaded fit between thescrew 220′ and the lower portion 232. Preferably, theswitch housing 176′ is made of a plastic material and the lower portion 232 can be tapped with a standard hex-head machine screw 220′. Referring now to FIGS. 3 and 4, theswitch housing 176 further includes an outwardly projectingwall 236 positioned adjacent to and extending along thearms arms arms switch housing 176 includes afirst opening 240 positioned belowarm 136 and asecond opening 244 positioned belowarm 144. Theopenings arms - Variations and modifications of the foregoing are within the scope of the present invention. It is understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention. The claims are to be construed to include alternative embodiments to the extent permitted by the prior art.
- Various features of the invention are set forth in the following claims.
Claims (30)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/850,226 US6479913B1 (en) | 2001-05-07 | 2001-05-07 | Electric motor having a no-adjust starting switch |
IT2002MI000962A ITMI20020962A1 (en) | 2001-05-07 | 2002-05-07 | ELECTRIC MOTOR WITH START SWITCH THAT DOES NOT REQUIRE ADJUSTMENT |
FR0205701A FR2826799B1 (en) | 2001-05-07 | 2002-05-07 | ELECTRIC MOTOR HAVING DRUM STARTER WITHOUT ADJUSTMENT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/850,226 US6479913B1 (en) | 2001-05-07 | 2001-05-07 | Electric motor having a no-adjust starting switch |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020163261A1 true US20020163261A1 (en) | 2002-11-07 |
US6479913B1 US6479913B1 (en) | 2002-11-12 |
Family
ID=25307597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/850,226 Expired - Lifetime US6479913B1 (en) | 2001-05-07 | 2001-05-07 | Electric motor having a no-adjust starting switch |
Country Status (3)
Country | Link |
---|---|
US (1) | US6479913B1 (en) |
FR (1) | FR2826799B1 (en) |
IT (1) | ITMI20020962A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130242484A1 (en) * | 2012-03-14 | 2013-09-19 | Brose Fahrzeugteile GmbH & Co. KG Wuerzburg | Adjusting drive of a motor vehicle adjusting element |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6882070B2 (en) * | 2003-04-01 | 2005-04-19 | A. O. Smith Corporation | Electric motor having a terminal board |
US6873131B1 (en) | 2004-01-15 | 2005-03-29 | A. O. Smith Corporation | Dual voltage electric motors |
US7898131B2 (en) * | 2008-07-07 | 2011-03-01 | A.O. Smith Corporation | External voltage change device |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1604497A (en) | 1924-09-02 | 1926-10-26 | Bert A Stocking | Automatic cut-out switch for motors |
US2493140A (en) | 1944-04-24 | 1950-01-03 | Smith Corp A O | Shaft extension for electric motors |
GB663417A (en) * | 1949-04-30 | 1951-12-19 | Midland Repetition & Auto Mfg | Control of electric motors |
US2991340A (en) * | 1959-03-10 | 1961-07-04 | Smith Corp A O | Switch mounting for rotating equipment |
FR1332388A (en) * | 1962-08-23 | 1963-07-12 | Bosch Gmbh Robert | Rotation speed limiter, in particular for household appliances and apparatus fitted with such a limiter |
US3660741A (en) | 1970-06-17 | 1972-05-02 | Sunbeam Corp | Governor controlled food mixer |
US4315118A (en) * | 1979-08-09 | 1982-02-09 | Robert Bosch Gmbh | Electric centrifugal switch |
US4689452A (en) * | 1986-12-16 | 1987-08-25 | Sundstrand Corporation | Centrifugal ball switch |
US4885440A (en) | 1987-12-21 | 1989-12-05 | Flint & Walling Industries, Inc. | Governor and motor assembly |
US4958096A (en) | 1987-12-21 | 1990-09-18 | Flint & Walling, Inc. | Governor and motor assembly |
US4894496A (en) * | 1988-06-29 | 1990-01-16 | Palumbo Nicholas R | Auxiliary winding cut-out switch for sump pump motor |
IL98358A (en) | 1991-06-04 | 1994-12-29 | Shekalim Avraham | Electrical actuator for valve or other device |
US5220226A (en) | 1991-10-22 | 1993-06-15 | A. O. Smith Corporation | Electric motor with modularized apparatus platform |
-
2001
- 2001-05-07 US US09/850,226 patent/US6479913B1/en not_active Expired - Lifetime
-
2002
- 2002-05-07 IT IT2002MI000962A patent/ITMI20020962A1/en unknown
- 2002-05-07 FR FR0205701A patent/FR2826799B1/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130242484A1 (en) * | 2012-03-14 | 2013-09-19 | Brose Fahrzeugteile GmbH & Co. KG Wuerzburg | Adjusting drive of a motor vehicle adjusting element |
US9025319B2 (en) * | 2012-03-14 | 2015-05-05 | Brose Fahrzeugeile GmbH & Co. KG Wuerzburg | Adjusting drive of a motor vehicle adjusting element |
Also Published As
Publication number | Publication date |
---|---|
ITMI20020962A1 (en) | 2003-11-07 |
FR2826799B1 (en) | 2007-05-18 |
FR2826799A1 (en) | 2003-01-03 |
US6479913B1 (en) | 2002-11-12 |
ITMI20020962A0 (en) | 2002-05-07 |
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