US1880498A - Cam-actuated double-throw switch - Google Patents

Cam-actuated double-throw switch Download PDF

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Publication number
US1880498A
US1880498A US477337A US47733730A US1880498A US 1880498 A US1880498 A US 1880498A US 477337 A US477337 A US 477337A US 47733730 A US47733730 A US 47733730A US 1880498 A US1880498 A US 1880498A
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United States
Prior art keywords
contact
cam
movable contact
work arm
switch
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Expired - Lifetime
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US477337A
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Schaelchlin Walter
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CBS Corp
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Westinghouse Electric and Manufacturing Co
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Priority to US477337A priority Critical patent/US1880498A/en
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    • 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
    • H01H19/62—Contacts actuated by radial cams

Definitions

  • My invention relates to control apparatus and more particularly to cam-actuated switches or the like.
  • An object of my invention is to provide a switch of the cam-actuated type in which there are no sliding contact members.
  • Another object of my invention is to provide a switch having a movable contact member actuated through a resilient member.
  • Another object of my invention is to provide means for locking the movable contact of a switch in either of its closed or its open positions.
  • a more specific object of my invention is 75 to provide'a switch for transferring an elec- Ed a trical connection from one circuit to another which is comparatively simple in construction, efiective in operation, and economical of manufacture.
  • a cam-actuated double-throw switch in its tact 2, connected by a flexible shunt 3 to a support member 4 and held therein by rivets 5.
  • the movable contact 2 is pivotally supported by a pin 6 in contact supports 7 which are pivotally supported by a pin 8 in support member 1.
  • Ears 9 and bosses 10 are provided on the contact-support arms for receiving springs 11.
  • a work arm 12 is pivotally mounted on support'member4 by pin 8 and has lugs 18 and bosses 14. thereon for. engaging springs cam-support member 18 for cooperating with 11.
  • Rollers 15 are provided in bifurcated projections on the work arm 12 and are supported by pins 16.
  • Afcam 17 is pivotally supported on the the rollers 15 on the work arm. Projectlons 19 and recesses 20 are provided on the cam to obtain the desired motion of the rollers. A handle 21 for actuating the cam is also provided as an integral part thereof.
  • the stationary contacts 1 and the support member 4 are located 011 the bars 22 and are insulated therefrom by rectangular insulating tubes 23. To connect the stationary contacts 1 and the support member 4 to their respective circuits, bus bars 24 are provided.
  • the cam 17 is turned in a clockwise direction by handle 21.
  • the work arm 12 is caused to rotate also in a clockwise direction by the projection 19 on the cam 17
  • the movement of the work arm compresses the springs 11 on the righthand side of the lugs 18 on the Work arm. Compression of the springs 11 rotates the contact support arms 7 in a clockwise direction, thereby causing movable contact 2 to engage the right-hand fixed contact 1. Further motion of the movable contact-support arms is prevented. further compresses the springs 11 until the lower roller 15 is positioned in the lower recess 20, thus obtaining the desired contact pressure. It is readily seen that the movablecontact 2 is locked in this closed position because of the position of the roller 15 on the cam 17, and cannot be opened unless the cam 17 is turned.
  • the switch is opened by reversing the above procedure.
  • the cam 17 is turned in a counter-clockwise direction by the handle 21.
  • Provision for locking the movable member of the switch in the open position is made by so shaping the cam that the operation of the movable member is irreversible.
  • the switch from this position is opened by turning the cam 17 in a clockwise direction.
  • a switch comprising a plurality of sta tionary contact members, a cooperative movable contact member, said movable contact member being pivotally supported by pivotally mounted contact-supportarms, a work arm resiliently connected thereto and means for shifting the movable contact member to a plurality of operating positions.
  • a switch comprising a plurality of stationary contact members, a cooperative movi able contact member, said movable contact member being supported by pivotally mounted contact-support arms, a work arm resiliently connected thereto, means for shifting the movable contact-member to plural ity' of operating positions. and means for locking saidmovable contact member in any operating position.
  • a switch comprising a plurality of stationary contact members, a cooperative movable-contact member, said movable'contact member being pivotally supported by pivotally mounted contact-support arms a work arm resilientlyconnected thereto, means for shifting the movable contact member toa plurality'of operating positions and means stationary contact members, a cooperative movable contact pivotally supported on; con-v connectedby a shunt,awork arm resiliently forlocking said movable contact member in any operating position.
  • a switch compr singa pluralityofstationary contacts, a cooperative movable contact pivotally supported on contact-support arms, said contact-supportarms being pi'votally supported on a support member, said movable contact and support member being shifting the movable contact to-any operat ing position, and means for locking th e'inovable contact in any operating position 6.
  • a switch comprising two independent tact-support arms, said support arms being pivotally mounted on a support member, said support member and movable contact being connected to said contact-support arms, said work arm havingrollers supported by pins. in bifurcated. projections thereon, a cam cooperating with'said rollers to actuate the work arm, thereby moving the contact supsupported vby pivotally: mounted contact-support arms, a work arm.
  • a switch comprising two stationary contacts, a cooperative movablejcontact connected by a flexible shunt to. a support memberof high conductivity, twocontact-support arms pivotally supporting said .movable contact and pivotallyfsupported on saidsuppor-t mem.- her by a pin, said contact-support armshavingprojecting ears and bosses. thereon to receive springs for actuating them, a work arm,
  • said work lar being alsoi shaped to receive two rollers in'bifurcated projections thereon.
  • a work arm having projecting ears-and bosses to' receiv springs for actuating-them, a work arm havs glp ie t ngh gs a dh se t i ctuate said springs and being pivotallymounted on the .Said s pp r em r by.. e s idm asaid connected by a shunt, a work arm resiliently '1 connected to-sa d contact arms, means for k em! 189 s aped t r i e o r l er in bifurcated projections thereon,,a cam co.-
  • a switch comprising, in combination, a i qe i g contact. em e aai m va le c nt member d spos d. to e gag th r e n contact member, a work arm for actuating the movable contact member into and out of engagement with the receiving contact member, a resilient member interposed between the work arm and the movable contact member, and a cam for positively actuating the contact member to its different positions.
  • a switch comprising, in combination, a receiving contact member, a movable con tact member disposed to engage the receiving contact member, a contact support arm for supporting the movable contact member, a work arm for actuating the movable contact member into and out of engagement with the receiving contact member, a support member for pivotally supporting the work arm, rollers mounted on the work arm, a cam disposed to cooperate with the rollers for positively actuating the movable contact member to its different positions, a resilient member interposed between the work arm and the movable contact member to provide suitable contact pressure, and a shunt for connecting the movable contact member to the support member.
  • a switch comprising, in combination, a receiving contact member, a movable contact member disposed to engage the receiving contact member, contact support arms for supporting the movable contact member, a work arm for actuating the movable contact member into and out of engagement with the receiving contact member, a support member for pivotally supporting the work arm, a plurality of rollers mounted on the work arm, a cam disposed to cooperate with the rollers for positively actuating the movable contact member to its difierent positions and of such shape as to lock the movable contact member in any operating position, a resilient member interposed between the work arm and the movable contact member to provide suitable contact pressure, and a flexible shunt for connecting the movable contact member to the support member.

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Description

Oct. 4, 1932. w. SCHAELCHLIN CAM ACTUATED DOUBLE THROW SWITCH Filed Aug. 25, 1930 2 Sheets-Sheet l 'ATTORNEY 1932- I w. SCHAELCHLIN 1,880,498
. CAM ACTUATED DOUBLE THROW SWITCH Filed Aug. 25, 1930 2 Sheets-Sheet 2 INVENTOR ATT'ORNEY Patented Oct. 4, 1932 UNITED STATES PATENT OFFICE WALTER SCHAELCHLIN, OF WILKINSBURG, IENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VAN IA CAM-ACTUATED DOUBLE-THROW SWITCH Application filed August 23, 1930. Serial No. 477,337.
My invention relates to control apparatus and more particularly to cam-actuated switches or the like.
An object of my invention is to provide a switch of the cam-actuated type in which there are no sliding contact members.
Another object of my invention is to provide a switch having a movable contact member actuated through a resilient member.
Another object of my invention is to provide means for locking the movable contact of a switch in either of its closed or its open positions.
A more specific object of my invention is 75 to provide'a switch for transferring an elec- Ed a trical connection from one circuit to another which is comparatively simple in construction, efiective in operation, and economical of manufacture.
Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawings, in which Figure 1 is a view, in front elevation, of
a cam-actuated double-throw switch in its tact 2, connected by a flexible shunt 3 to a support member 4 and held therein by rivets 5. The movable contact 2 is pivotally supported by a pin 6 in contact supports 7 which are pivotally supported by a pin 8 in support member 1. Ears 9 and bosses 10 are provided on the contact-support arms for receiving springs 11. v
A work arm 12 is pivotally mounted on support'member4 by pin 8 and has lugs 18 and bosses 14. thereon for. engaging springs cam-support member 18 for cooperating with 11. Rollers 15 are provided in bifurcated projections on the work arm 12 and are supported by pins 16.
Afcam 17 is pivotally supported on the the rollers 15 on the work arm. Projectlons 19 and recesses 20 are provided on the cam to obtain the desired motion of the rollers. A handle 21 for actuating the cam is also provided as an integral part thereof.
The stationary contacts 1 and the support member 4 are located 011 the bars 22 and are insulated therefrom by rectangular insulating tubes 23. To connect the stationary contacts 1 and the support member 4 to their respective circuits, bus bars 24 are provided.
The operation of the above described apparatus may be set forth as follows:
The cam 17 is turned in a clockwise direction by handle 21. The work arm 12 is caused to rotate also in a clockwise direction by the projection 19 on the cam 17 The movement of the work arm compresses the springs 11 on the righthand side of the lugs 18 on the Work arm. Compression of the springs 11 rotates the contact support arms 7 in a clockwise direction, thereby causing movable contact 2 to engage the right-hand fixed contact 1. Further motion of the movable contact-support arms is prevented. further compresses the springs 11 until the lower roller 15 is positioned in the lower recess 20, thus obtaining the desired contact pressure. It is readily seen that the movablecontact 2 is locked in this closed position because of the position of the roller 15 on the cam 17, and cannot be opened unless the cam 17 is turned.
The switch is opened by reversing the above procedure. The cam 17 is turned in a counter-clockwise direction by the handle 21.
Provision for locking the movable member of the switch in the open position is made by so shaping the cam that the operation of the movable member is irreversible.
Contact with the left-hand stationary contact is made by moving the cam 17 in a counter-clockwise direction until the upper roller 15 is positioned in the upper recess 20 in the cam 17.
The switch from this position is opened by turning the cam 17 in a clockwise direction.
Although I have shown and described a certain specific embodiment of my invention,
The Work arm 12 L- resiliently connected thereto and means for shifting the movable contact member. to-a plurality of operating positions.
2. A switch comprising a plurality of sta tionary contact members, a cooperative movable contact member, said movable contact member being pivotally supported by pivotally mounted contact-supportarms, a work arm resiliently connected thereto and means for shifting the movable contact member to a plurality of operating positions.
3. A switch comprising a plurality of stationary contact members, a cooperative movi able contact member, said movable contact member being supported by pivotally mounted contact-support arms, a work arm resiliently connected thereto, means for shifting the movable contact-member to plural ity' of operating positions. and means for locking saidmovable contact member in any operating position. v
4. A switch comprising a plurality of stationary contact members, a cooperative movable-contact member, said movable'contact member being pivotally supported by pivotally mounted contact-support arms a work arm resilientlyconnected thereto, means for shifting the movable contact member toa plurality'of operating positions and means stationary contact members, a cooperative movable contact pivotally supported on; con-v connectedby a shunt,awork arm resiliently forlocking said movable contact member in any operating position.
5. "A switch compr singa pluralityofstationary contacts, a cooperative movable contact pivotally supported on contact-support arms, said contact-supportarms being pi'votally supported on a support member, said movable contact and support member being shifting the movable contact to-any operat ing position, and means for locking th e'inovable contact in any operating position 6. A switch comprising two independent tact-support arms, said support arms being pivotally mounted on a support member, said support member and movable contact being connected to said contact-support arms, said work arm havingrollers supported by pins. in bifurcated. projections thereon, a cam cooperating with'said rollers to actuate the work arm, thereby moving the contact supsupported vby pivotally: mounted contact-support arms, a work arm.
portmember, said. supportarms having projecting ears and bosses thereon for the mount- .ing. of springs,.meansprovided, through a cam action, to actuate said springs, thereby moving the contact-support arms and contact to any operatingposition and means for locking themin any operatingpositi'on.
8. A switch comprising two stationary contacts, a cooperative movablejcontact connected by a flexible shunt to. a support memberof high conductivity, twocontact-support arms pivotally supporting said .movable contact and pivotallyfsupported on saidsuppor-t mem.- her by a pin, said contact-support armshavingprojecting ears and bosses. thereon to receive springs for actuating them, a work arm,
havingprojecting lugs and bosses to actuate said springs and pivotally mounted on=the said support I member by; the I aforesaid pin,
said work lar being alsoi shaped to receive two rollers in'bifurcated projections thereon.
means for movingsaid work arm andthereby actuating the saidjmoving contact toany;op,-,
crating position and means for locking said ed by a flexibleshunt to a support member of high 'conductivity, twgo contact-support arms pivotally supporting said movable con-.. tact and piyotally supportedon saidlsupport m rby. a p n, s idfc ntact-supp t ms.-.
having projecting ears-and bosses to' receiv springs for actuating-them, a work arm havs glp ie t ngh gs a dh se t i ctuate said springs and being pivotallymounted on the .Said s pp r em r by.. e s idm asaid connected by a shunt, a work arm resiliently '1 connected to-sa d contact arms, means for k em! 189 s aped t r i e o r l er in bifurcated projections thereon,,a cam co.-
being of such shape as to'cause motion of said rk a t c mp ess aid spr g th eby moving the' said contact-support arms and. m le ntact c r ie h r by t eitheri the two closed positions or to fopeni posi tionand also of ,such shapeas to locksaid movable contact in eitherof thejfclosed ositions or in the open position, said cam being I also formed to provirlea handle for actuating the switch. a I
10. Ina switch comprising, in combination, a i qe i g contact. em e aai m va le c nt member d spos d. to e gag th r e n contact member, a work arm for actuating the movable contact member into and out of engagement with the receiving contact member, a resilient member interposed between the work arm and the movable contact member, and a cam for positively actuating the contact member to its different positions.
11. In a switch comprising, in combination, a receiving contact member, a movable con tact member disposed to engage the receiving contact member, a contact support arm for supporting the movable contact member, a work arm for actuating the movable contact member into and out of engagement with the receiving contact member, a support member for pivotally supporting the work arm, rollers mounted on the work arm, a cam disposed to cooperate with the rollers for positively actuating the movable contact member to its different positions, a resilient member interposed between the work arm and the movable contact member to provide suitable contact pressure, and a shunt for connecting the movable contact member to the support member.
12. In a switch comprising, in combination, a receiving contact member, a movable contact member disposed to engage the receiving contact member, contact support arms for supporting the movable contact member, a work arm for actuating the movable contact member into and out of engagement with the receiving contact member, a support member for pivotally supporting the work arm, a plurality of rollers mounted on the work arm, a cam disposed to cooperate with the rollers for positively actuating the movable contact member to its difierent positions and of such shape as to lock the movable contact member in any operating position, a resilient member interposed between the work arm and the movable contact member to provide suitable contact pressure, and a flexible shunt for connecting the movable contact member to the support member.
In testimony whereof, I have hereunto subscribed my name this 21st day of August,
1930. WALTER SCHAELCHLIN.
tin
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563830A (en) * 1945-11-07 1951-08-14 Monitor Controller Co Radio-frequency contactor
DE1062315B (en) * 1956-10-31 1959-07-30 Voigt & Haeffner Ag Reversing mechanism for electrical switches, especially foot switches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563830A (en) * 1945-11-07 1951-08-14 Monitor Controller Co Radio-frequency contactor
DE1062315B (en) * 1956-10-31 1959-07-30 Voigt & Haeffner Ag Reversing mechanism for electrical switches, especially foot switches

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