US3394601A - Switchgear apparatus - Google Patents
Switchgear apparatus Download PDFInfo
- Publication number
- US3394601A US3394601A US543585A US54358566A US3394601A US 3394601 A US3394601 A US 3394601A US 543585 A US543585 A US 543585A US 54358566 A US54358566 A US 54358566A US 3394601 A US3394601 A US 3394601A
- Authority
- US
- United States
- Prior art keywords
- gear
- shaft
- cam
- gears
- teeth
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G15/00—Mechanical devices for initiating a movement automatically due to a specific cause
- G05G15/04—Mechanical devices for initiating a movement automatically due to a specific cause due to distance or angle travelled by a member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
- H01H19/14—Operating parts, e.g. turn knob
- H01H19/18—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
- H01H19/183—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift adapted for operation by the simultaneous action of two cam plates, rotating at different speeds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
- H01H19/60—Angularly-movable actuating part carrying no contacts
- H01H19/63—Contacts actuated by axial cams
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18288—Cam and lever
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2102—Adjustable
Definitions
- a planetary gearing comprising two equisized gears with different numbers of teeth, of which the one is stationary, and the other one is rotatably pivoted, and in which the driving is effected via a rotating intermediate gear.
- the invention is based on the idea of converting such a planetary gearing in such a way, and of providing it with additional means, that a high reduction and a rapid contact actuation will become achievable in a simple manner.
- the present invention is characterized by the fact that on a shaft, which is actuated by the driving system, two gears have their surfaces placed closely together. Each of these gears has a different number of teeth, and each is connected via an intermediate gear mounted on a stationary shaft. One of said gears being seated firmly on the shaft, while the other one is seated on the same shaft in an axially displaceable and tiltable manner.
- the inner surface of one gear has a semi-circular groove, while the inner surface of the other gear has a cam guided in said semicircular groove of the other gear, and actuating means are provided on the outside surface of the non-stationary gear for actuating the contacts.
- FIGS. 1 and 2 of the accompanying drawing both the construction and the mode of operation of an exemplified embodiment of the inventive type of switchgear apparatus will now be explained with reference to FIGS. 1 and 2 of the accompanying drawing, in which:
- FIG. 1 shows the apparatus in an exploded view
- FIGS. 2a to 20 show the various phases of movement during the actuation of the contacts.
- the reference numeral 1 indicates a shaft which is operated via a Worm gear 2 and a pinion gear 3 by the driving system.
- a gear 4 is mounted with the aid of set screws 5.
- the center boss 9 of gear 6 is provided with an enlarged bore and is slotted in one direction thus allowing it to be tilted.
- the inner surface of the gear 4 is provided with a cam 13, and the inner surface of the gear 6 is provided with a semicircular groove 14. Moreover, on the outer surface of gear 6, and at differently large diameters, there are arranged the earns 15 and 16 serving to actuate the terminating contacts 17 and 18.
- the cam 16 meets against the contact 18. This is performed at the circumferential speed as given by the number of revolutions of the shaft 1, and not at the very low difference in speed of the gears 4 and 6, resulting in contact 18 being rapidly and reliably switched, and the driving system coming to a standstill.
- gearing of equal diameter but with different numbers of teeth are utilized in planetary gearings.
- the gear 4 comprises seventy teeth
- the gear 6 sixty-eight teeth
- the intermediate gear 12 comprises twenty-four teeth.
- the actuation of the contact is effected at the circumferential of gear 6 whose number of rotations is about 10 times higher than its differential movement.
- the invention is in no way restricted merely to the actuation of terminating or end contacts, but may be analogously applied to all cases where, in spite of a high reduction, a rapid control and actuation of contacts is supposed to be made possible.
- Switch gear apparatus for actuation of contacts comprising:
- said stationary gear having a cam on its inner surface, and said axially displace'able and tiltable gear having on its adjacent inner surface a coincident groove into which said cam is periodically engaged;
- actuating means arranged on the outer surface of said axially displaceable and tiltable gear
- said cam is caused to periodically disengage from said coincident groove resulting in the axial displacement and tilting of said displaceable and tiltable gear, and said means actuates said contacts.
- Apparatus according to claim 2 including a collar which is pressed onto said driving shaft against a shoulder located adjacent said boss.
- Apparatus according to claim 3 further including a spring, one .end of said spring being retained by said collar and the other end of said spring surrounding said boss, such that said spring urges the inner surfaces of said pair together.
- actuating means is a pair of diametrically located cam surfaces, that during the axial displacement and tilting of said displaceable and tiltable gear, one of said cam surfaces is caused to activate one of said contacts, and that on further rotation of said drive shaft, the other of said cam surf-aces actuates the other of said contacts.
- Apparatus according to claim 1 further including a holder for mounting said drive shaft and for mounting the shaft of said intermediate gear.
- a worm gear being positioned to engage said pinion gear to cause rotation of said pair of gears.
- Apparatus according to claim 7 further including a plurality of set screws located in said stationary gear for fixing the position of said stationary gear on said driving shaft.
Description
July 30, 1968 H. WALDENBURGER 3,394,601
SWITCHGEAR APPARATUS Filed April 19, 1966 2 Sheets-Sheet 1 INVENI OR HERMAN/V WAL DC'NBURGER ATTORNEY- July 30. 1968 H. WALDENBURGER 3,394,601
SWITCHGEAR APPARATUS Filed April 19, 1966 2 Sheets-Sheet 2 Fig. 2c
INVENT OR HERMANN WALON8URGR ATTORNEY 3,394,601 SWITCHGEAR APPARATUS Hermann Waldenburg'er, Pforzen, near Kaufbeuren, Germany, assignor to International Standard Electric Corporation, New York, N.Y., a corporation of Delaware Filed Apr. 19, 1966, Ser. No. 543,585 v Claims priority, application Germany, Apr. 23, 1965,
10 Claims. (Cl. 74-54) ABSTRACT OF THE DISCLOSURE A switch gear apparatus operated by a driving system, wherein two equisized gears are closely mounted on a shaft, these gears have different numbers of teeth and engage an intermediate gear. One gear is stationarily mounted and the other gear is axially displaceable and tiltable so as to actuate a pair of contacts.
.tatiugly actuated. This may become the cause of an unreliable contact-making, and of an increased burning 01f.
Moreover, there is also known a planetary gearing comprising two equisized gears with different numbers of teeth, of which the one is stationary, and the other one is rotatably pivoted, and in which the driving is effected via a rotating intermediate gear.
The invention is based on the idea of converting such a planetary gearing in such a way, and of providing it with additional means, that a high reduction and a rapid contact actuation will become achievable in a simple manner.
The present invention is characterized by the fact that on a shaft, which is actuated by the driving system, two gears have their surfaces placed closely together. Each of these gears has a different number of teeth, and each is connected via an intermediate gear mounted on a stationary shaft. One of said gears being seated firmly on the shaft, while the other one is seated on the same shaft in an axially displaceable and tiltable manner. The inner surface of one gear has a semi-circular groove, while the inner surface of the other gear has a cam guided in said semicircular groove of the other gear, and actuating means are provided on the outside surface of the non-stationary gear for actuating the contacts.
Both the construction and the mode of operation of an exemplified embodiment of the inventive type of switchgear apparatus will now be explained with reference to FIGS. 1 and 2 of the accompanying drawing, in which:
FIG. 1 shows the apparatus in an exploded view, and
FIGS. 2a to 20 show the various phases of movement during the actuation of the contacts.
Referring now to FIG. 1, the reference numeral 1 indicates a shaft which is operated via a Worm gear 2 and a pinion gear 3 by the driving system. At the free end of the shaft 1, a gear 4 is mounted with the aid of set screws 5. A second. gear 6, which is of the same size, but which has either a larger or smaller number of teeth, is pressed by the collar 7 of the shaft 1 and with the States Patent aid of a spring 8, against the gear 4. The center boss 9 of gear 6 is provided with an enlarged bore and is slotted in one direction thus allowing it to be tilted. At the holder 3,394,601 Patented July 30, 1968 10, and on a shaft 11, there is pivoted an intermediate gear 12 which engages the teeth of the gears 4 and 6. The inner surface of the gear 4 is provided with a cam 13, and the inner surface of the gear 6 is provided with a semicircular groove 14. Moreover, on the outer surface of gear 6, and at differently large diameters, there are arranged the earns 15 and 16 serving to actuate the terminating contacts 17 and 18.
As soon as the shaft 1 is driven by the worm 2, the gears 4 and '6, which are in connection via the intermediate gear 12, are rotated at almost the same speed. Due to the different number of teeth, however, there results a slight difference'in the speed of the wheels with respect to one another. If the mechanism to be actuated is positioned between the end positions then, as is shown in FIG. 2a, the cam 13 is positioned in the groove 14. The cams 15 and 16 are thus led past the contacts 17 and 18 without actuating them. At approximately one rotation of the shaft 1 prior to reaching the one end position of the drive, the cam 13 is lifted out of the groove 14 and, as is shown in FIG. 2b, effects a sideway tilting of the gear 6. During the completion of this rotation, e.g. the cam 16 meets against the contact 18. This is performed at the circumferential speed as given by the number of revolutions of the shaft 1, and not at the very low difference in speed of the gears 4 and 6, resulting in contact 18 being rapidly and reliably switched, and the driving system coming to a standstill.
During the return movement, towards the other end position, the cam 13 will drop back into the groove 14 after the rotation of the shaft has not been fully completed, which will then result in the condition as shown in FIG. 2a. Again approximately one rotation prior to reaching the opposite end position, the gears 4 and 6 have been turned to such an extent with respect to one another, thatthe cam 13 is again lif-ted out of the groove 14, thus tilting the gear 6 in such a way that it, with its cam '15, will meet against the contact 17, thus actuating the latter and causing the driving system to be switched off.
As indicated in the introduction to the specification, gearing of equal diameter but with different numbers of teeth are utilized in planetary gearings. In the case under consideration, the gear 4 comprises seventy teeth, the gear 6 sixty-eight teeth, and the intermediate gear 12 comprises twenty-four teeth. When using these ratios, it is possible to select the tooth profiles in such a way that the gears 4 and 6 firmly engage one another (i.e. are in a snug fit) via the intermediate gear 12. There will not be jamming of the gears 4 and 6, because the gear 4 is seated on shaft 1 so that it can be turned and tilted.
To better understand the sequences of movement during the actuation of contact 18 in the one end position, and of the contact 17 in the other end position of a tape driving system, the following illustrates some numerical values used in a switch-gear apparatus according to the invention:
(a) Normal p0sition.The actuating means of the contact 18 is positioned in the centre of the cam 16 of the gear 6.
(b) After an angle of rotation of the shaft 1 and of the gear 6, of about 5 in the clockwise direction, the cam 16 has left the contact 18, contact 18 opens.
(0) After about half a rotation and due to the differential movement of the gears 4 and 6, the cam 13 on the inside of the gear 4 engages the groove 14 which is provided on the inside of the gear 6.
(d) After 9 /2 rotations of the shaft 1 the cam 13 has reached the opposite end of the groove 14 and starts to tilt the gear 6.
(e) After a /4 rotation out of position d, the cam 15 reaches the actuating means of the contact 17. V
(f) After an angle of rotation of 5 out of the position e,
the contact 17 is actuated.
Accordingly, the actuation of the contact is effected at the circumferential of gear 6 whose number of rotations is about 10 times higher than its differential movement.
The invention is in no way restricted merely to the actuation of terminating or end contacts, but may be analogously applied to all cases where, in spite of a high reduction, a rapid control and actuation of contacts is supposed to be made possible.
While the above principles of the invention have been described in connection with specific apparatus, it is to be clearly understood that this description is made only by way of example and not as a limitation to the scope of the invention, as set forth in the accompanying claims.
I claim:
1. Switch gear apparatus for actuation of contacts comprising:
a drive shaft mounted for rotation;
driving means for rotating the drive shaft;
a pair of equisized gears having different numbers of teeth, one of said gears is seated on said shaft in a stationary manner and the other of said gears is mounted adjacent said stationary gear in an axially displaceable and tiltable manner;
an intermediate gear engaging said pair and rotatably mounted on a shaft;
said stationary gear having a cam on its inner surface, and said axially displace'able and tiltable gear having on its adjacent inner surface a coincident groove into which said cam is periodically engaged;
means coupled between said axially displaceable and tiltable gear and said drive shaft urging the inner surfaces of said pair together; and
actuating means arranged on the outer surface of said axially displaceable and tiltable gear;
whereby, due to the difference in the number of teeth of said pair engaging said intermediate gear during the rotation of said drive shaft, said cam is caused to periodically disengage from said coincident groove resulting in the axial displacement and tilting of said displaceable and tiltable gear, and said means actuates said contacts.
2. Apparatus according to claim 1 wherein the outer surface of said axiallyfldisplaceable and tiltable gear includes a slotted boss centrically located with respect to said actuating means, to permit the tilting of said gear.
'3. Apparatus according to claim 2 including a collar which is pressed onto said driving shaft against a shoulder located adjacent said boss.
'4. Apparatus according to claim 3 further including a spring, one .end of said spring being retained by said collar and the other end of said spring surrounding said boss, such that said spring urges the inner surfaces of said pair together.
5. Apparatus according to claim 2, wherein said actuating means is a pair of diametrically located cam surfaces, that during the axial displacement and tilting of said displaceable and tiltable gear, one of said cam surfaces is caused to activate one of said contacts, and that on further rotation of said drive shaft, the other of said cam surf-aces actuates the other of said contacts.
6. Apparatus according to claim 1, further including a holder for mounting said drive shaft and for mounting the shaft of said intermediate gear.
7. Apparatus according to claim 6 wherein said drive means comprises:
a pinion gear attached to said shaft; and
a worm gear being positioned to engage said pinion gear to cause rotation of said pair of gears.
8. Apparatus according to claim 7 further including a plurality of set screws located in said stationary gear for fixing the position of said stationary gear on said driving shaft.
9. Apparatus according to claim 5, wherein said groove is a semicircular groove.
10. Apparatus according to claim 5, wherein said diametrically located cam surfaces are located on a larger diameter than said groove.
References Cited UNITED STATES PATENTS 2,528,344 10/1950 Davis 74568 FRED C. MATTERN, 1a., Primary Examiner.
W. S. RATLIFF, Assistant Examiner.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEST023726 | 1965-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3394601A true US3394601A (en) | 1968-07-30 |
Family
ID=7459843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US543585A Expired - Lifetime US3394601A (en) | 1965-04-23 | 1966-04-19 | Switchgear apparatus |
Country Status (6)
Country | Link |
---|---|
US (1) | US3394601A (en) |
CH (1) | CH452657A (en) |
DE (1) | DE1472417A1 (en) |
FR (1) | FR1477109A (en) |
GB (1) | GB1078388A (en) |
SE (1) | SE302532B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4511085A (en) * | 1981-04-08 | 1985-04-16 | Perrot-Regnerbau Gmbh & Co. | Swivel drive for fan-jet sprinkler |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111105940B (en) * | 2018-10-29 | 2021-11-16 | 平高集团有限公司 | Electric spring mechanism and grounding switch |
EP4099354A1 (en) * | 2021-06-01 | 2022-12-07 | ABB Schweiz AG | Electrical switch |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2528344A (en) * | 1948-07-17 | 1950-10-31 | Union Bag & Paper Corp | Adjustable cam mechanism |
-
1965
- 1965-04-23 DE DE19651472417 patent/DE1472417A1/en active Pending
-
1966
- 1966-04-19 US US543585A patent/US3394601A/en not_active Expired - Lifetime
- 1966-04-19 CH CH562766A patent/CH452657A/en unknown
- 1966-04-21 SE SE5405/66A patent/SE302532B/xx unknown
- 1966-04-22 FR FR58642A patent/FR1477109A/en not_active Expired
- 1966-04-22 GB GB17690/66A patent/GB1078388A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2528344A (en) * | 1948-07-17 | 1950-10-31 | Union Bag & Paper Corp | Adjustable cam mechanism |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4511085A (en) * | 1981-04-08 | 1985-04-16 | Perrot-Regnerbau Gmbh & Co. | Swivel drive for fan-jet sprinkler |
Also Published As
Publication number | Publication date |
---|---|
DE1472417A1 (en) | 1969-01-23 |
CH452657A (en) | 1968-03-15 |
FR1477109A (en) | 1967-04-14 |
SE302532B (en) | 1968-07-22 |
GB1078388A (en) | 1967-08-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3539736A (en) | Reciprocable and rotatable switch with the same cams performing both actions | |
US3066208A (en) | Tap changing apparatus | |
US2438545A (en) | Geared motor linearly actuated | |
US3394601A (en) | Switchgear apparatus | |
US2389350A (en) | Limit switch | |
GB790739A (en) | Improvements in or relating to auto-transformer tap changers | |
US2991662A (en) | Devices for limiting rotation | |
US2825772A (en) | Timer | |
FR2275824A1 (en) | Switching point adjusting mechanism for venetian blinds - has differential gear drive and pairs of notched disc cams | |
US2519907A (en) | Limit switch | |
US4149046A (en) | Rotational line switch control | |
US3603749A (en) | Subinterval timer drive system | |
US3227826A (en) | Timer switch mechanism | |
US2260592A (en) | Switch | |
US2630021A (en) | Variable-speed gear | |
US3084659A (en) | Indicator mechanism | |
US2769941A (en) | Rotary coaxial switch actuating mechanism | |
US3148558A (en) | Adjustable actuating mechanism | |
GB998890A (en) | Improvements in or relating to electrical time switches | |
US3476892A (en) | Shaft locking device | |
US2976377A (en) | Switch construction and mechanism therefor | |
US3288950A (en) | Clutch apparatus for counter switch mechanism | |
US4295380A (en) | Gearing for a motor driven timing relay | |
US3118031A (en) | Treadle switch | |
US2221324A (en) | Control device |