US3814874A - Cam-actuated timer switch - Google Patents

Cam-actuated timer switch Download PDF

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Publication number
US3814874A
US3814874A US00346313A US34631373A US3814874A US 3814874 A US3814874 A US 3814874A US 00346313 A US00346313 A US 00346313A US 34631373 A US34631373 A US 34631373A US 3814874 A US3814874 A US 3814874A
Authority
US
United States
Prior art keywords
cam
contact
output shaft
timer switch
enclosure
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
Application number
US00346313A
Other languages
English (en)
Inventor
W Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Duracell Inc USA
Emerson Electric Co
Original Assignee
PR Mallory and Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PR Mallory and Co Inc filed Critical PR Mallory and Co Inc
Priority to US00346313A priority Critical patent/US3814874A/en
Priority to CA196,089A priority patent/CA1001700A/en
Priority to AU67182/74A priority patent/AU6718274A/en
Priority to ES424790A priority patent/ES424790A1/es
Priority to DE2415375A priority patent/DE2415375A1/de
Priority to BR2508/74A priority patent/BR7402508D0/pt
Priority to JP49034779A priority patent/JPS5052573A/ja
Priority to FR7411211A priority patent/FR2223818B1/fr
Priority to IT68019/74A priority patent/IT1009409B/it
Priority to GB1431874A priority patent/GB1466083A/en
Application granted granted Critical
Publication of US3814874A publication Critical patent/US3814874A/en
Priority to ES446884A priority patent/ES446884A1/es
Assigned to EMERSON ELECTRIC CO. A CORP. OF MISSOURI reassignment EMERSON ELECTRIC CO. A CORP. OF MISSOURI ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H01H43/103—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after one preselected time interval

Definitions

  • the present invention relates to a cam-acutated timer switch including two cam members rotating side by side in an enclosure and a long and short set of contact-carrying blades responsive to the cam members wherein the long set is located on one side of a line through the centers of the cam members and the short set is located on the other side of that line.
  • a cam-actuated timer switch including a cam member rotating in a substantially-thin enclosure wherein the enclosure includes two groups of slots and a set of contact-carrying blades responsive to the cam member and disposed in one of the groups of slots.
  • the trend to make domestic and industrial appliances smaller and more compact has created a demand for thin timer switches and controls for use in these appliances.
  • the present timer switch being substantially thin in cross-section adapts well to such limited-space applications.
  • the present timer switch may be used in a kitchen blender to provide a preselected amount of on time.
  • the timer may be located in a small molded-plastic base in which larger timer switches would not fit.
  • One embodiment of the present invention utilizes two cam members rotating side by side instead of in the conventional in-line arrangement found in many timers.
  • This side-by-side embodiment is thinner in a dimension taken parallel to the cam axes than an in-line version-employing the same number and size of cam members.
  • the structure of the present invention allows a variety of combinations of cam members and sets of contact-carrying blades.
  • a set of contact-carrying blades responsive to the cam member may be disposed in one of two groups of slots so that they may be responsive to either direction of rotation of the cam member.
  • the cam member may be flipped over 180 to present the same cam profiles to the set of contact-carrying blades in their alternate location.
  • Each of a long and short set of contact-carrying blades is disposed in one of two groups of slots.
  • the slots are located in the structure in such a way that the long and short sets of contact-carrying blades may be interchanged, whereby each set may be responsive to either of the two cam members.
  • the two sets of slots are disposed opposite sides of a line through the centers of the two cam members.
  • the present invention also includes provisions for a contact-spacing means separating two contact-carrying blades in each set a predetermined distance apart to achieve improved electrical switching characteristics in the form of more accurately controlled air gaps between the contacts.
  • a feature of the present invention is to provide a cam-actuated timer switch substantially thin in a direction substantially parallel to the axis of a timer motor output shaft. Another feature of the present invention is to provide a cam-actuated timer switch with a variety of available locations and combinations of cam members and contact-carrying blades. Another feature of the present invention is to provide a camactuated timer'switch with two cams one each rotating on parallel shafts and in opposite directions. Another feature of the present invention is to provide a camactuated timer switch including an enclosure that substantially envelops the cam members and contactcarrying blades and provides support, location and entrapment of the contact-carrying blades.
  • FIG. 1 is an elevation view of an embodiment of the invention.
  • FIG. 2 is a front view of an embodiment of the invention, with the motor shown in FIG. I removed, utilizing a primary cam and a set of contact-carrying blades.
  • FIG. 3 is a front view of the same embodiment as shown in FIG. 2 with the cam flipped over and the contact-carrying blades in an alternate location.
  • FIG. 4 is a front view of an embodiment of the invention, with the motor shown in FIG. I removed, utilizing two cams and two sets of contact-carrying blades.
  • FIG. 5 is a front view of the same embodiment shown in FIG. 4 with the cams flipped over and the sets of contact-carrying blades interchanged.
  • FIG. 6 is a rear view ofa slider engaging a set of contact-carrying blades.
  • FIG. 7 is a section taken along the line 7-7 of FIG. 4.
  • Synchronous gear motor 10 includes a gear housing 11.
  • Attachment means 13 comprises a plurality of hollow rivets l6-inserted through holes in the gear housing 11 and substantially thin timing means 20 and headed over, thereby securing the two together.
  • cam means 26 includes a primary cam member 32 comprising two cam tracks 34 and 36.
  • Primary cam member 32 is carried on an output shaft 38 extending from motor 10.
  • cam means 27 includes a primary cam member 40 comprising two cam tracks 42 and 44 and a cam separation means 46-.
  • Cam separation means 46 comprises a gear 48 sandwiched in between the two cam tracks 42 and 44.
  • Cam means 27 further includes a secondary cam member 50 comprising two cam tracks 52 and 54 and a cam separation means 56.
  • Secondary cam member 50 is carried on a second shaft 49 which is rotatably journaled in a cup-shaped housing 58.
  • Cam separation means 56 comprises a gear 57 sandwiched in between the two cam tracks 52 and-54.
  • a coupling means 51 coupling the two cam members together comprises gear 48 in engagement with gear 57.
  • an enclosure 30 is of a substantially parallelpiped' shape and comprises cup-shaped housing 58 and a substantially thin and flat cover 60.
  • Enclosure 30 includes aratio of thickness-to-perimeter distance of from 1/40 to 1/20 wherein the thickness is taken in a direction substantially parallel to the longitudinal axis of output shaft 38, and the perimeter is measured around enclosure 30 in a plane substantially perpendicular to the longitudinal axis of the output shaft 38.
  • the cup-shaped housing 58 includes a first set of slots 62 disposed in a wall 59 of the cup-shaped housing as shown in FIG. 2.
  • a second set of slots 64 is shown disposed in an alternate location in wall 59 in FIG. 3.
  • Each set of slots 62 and 64 contains a plurality of slots, and each set is located on opposite sides of a line A-B through the centers of primary cam member 40 and secondary cam member. 50. Both sets of slots 62 and 64 are shown in the embodiment illustrated in FIGS. 4 and Electrical switching means 28 includes a plurality of contact-carrying blades 66 and 68 which are inserted in one of the sets of slots 62 and 64 shown in the em bodiment illustrated in FIGS. 2 and 3. Cam follower tips 67 and 69 are disposed on the distal ends of blades 66 and 68 respectively. Electrical contacts 63 appear on blades 66 and 68 also. Substantially-thin and flat cover 60 of second enclosure 30 entraps the plurality of contact-carrying blades 66 and 68 in one of the sets of slots 62 and 64.
  • Electrical switching means 29 includes a long set 70 v and a short set 72 of contact-carrying blades, each set being inserted in one of the sets of slots 62 and 64 in the embodiment shown in FIGS. 4 and 5.
  • the long set 70 is responsive to primary cam member 40
  • the short set 72 is responsive to secondary cam member 50.
  • Cam follower tips 74 and 76 are disposed on the distal ends of two of the long set of contact-carrying blades 70
  • cam follower tips 78 and 80 are disposed on the distal ends of two of the short set of contact-carrying blades 72.
  • a first set of contacts 71 is carried by the long set of contact-carryin g blades 70, and a second set of contacts 73 is carried by the short set of contactcarrying blades 72.
  • Substantially thin and flat cover 60 of enclosure 30 entraps the long set and short set of contact-carrying blades 70 and 72 in the sets of slots 62 and 64.
  • the long set of contact-carrying blades 70 is located on one side ofa line A-B through the centers of primary cam member 40 and secondary cam member 50, and the short act of contact-carrying blades 72 is located on the other side of line A-B.
  • a contact-spacing'means 82 comprises a slider 84 freely translatable along one of a plurality of slider guides 86 which are disposed on the inside of cupshaped housing 58.
  • Slider 84 includes lugs 88 and 90 which engage the long set of contact-carrying blades 70.
  • Slider 92 includes lugs 94 and 96 which engage the short set of contact-carrying blades 72.
  • the long and short sets of contact-carrying blades 70 and 72 restrain sliders 84 and 92 each in contact with a slider guide 86.
  • synchronous gear motor causes output shaft 38 and primary cam member 40, carried on the output shaft, to rotate.
  • cam means 26 comprises a primary cam member 32.
  • primary cam member 32 rotates past cam follower tips 68 and 66 respectively, contacts 63 make and break according to profiles on cam tracks 34 and 36.
  • the cam means 27 comprises a primary cam member 40 and a secondary cam member 50.
  • primary cam member 40 rotates past cam follower tips 74 and 76, the long set of contact-carrying blades respond to the profiles of cam tracks 42 and 44 causing electrical contacts 71 to open and close.
  • Gear 48 drives gear 57 on secondary earn member 50. This causes cam tracks 52 and 54 to rotate past the cam follower tips 78 and 80.
  • the short set of contactcarrying blades 72 respond to the profiles of cam tracks 52 and 54 causing electrical contacts 73 to open and close.
  • Lugs 88 and on slider 84 engage two of the long set of contact-carrying blades 70 to partially sapce contacts 71 apart during their opening and closing.
  • Lugs 94 and 96 on slider 92 engage two of the short set of contact-carrying blades 72 to partially space contacts 73 apart during their opening and closing.
  • a cam-actuated timer switch comprising:
  • a cam means including a primary and a secondary cam member, wherein said primary cam member is carried on said output shaft and said secondary cam member is carried on a second shaft substantially parallel to said output shaft;
  • an electrical switching means responsive to said cam means including a long and short set of contact-carrying blades wherein said long set of contact-carrying blades is located on one side of a line through the centers of said primary and secondary cam members, and said short set of contactcarrying blades is located on the other side of said line;
  • cam separation means comprises said gear
  • cup-shaped housing includes a plurality of slots disposed in a side wall thereof in which are disv posed said long and short sets of contact-carrying blades.
  • said contact spacing means includes at least one slider freely translatable along one of a plurality of slider guides.
  • a cam-actuated timer switch comprising:
  • a cam member including two substantially concentric tracks, carried on said output shaft;
  • an enclosure substantially enveloping said cam member and carrying said output shaft and enveloping and carrying said plurality of contactcarrying blades and wherein said enclosure-is substantially parallelpiped in shape including a ratio of thickness to perimeter distance of from l/40 to l/20, said thickness taken in a direction substantially parallel to a longitudinal axis of said output shaft, and said perimeter measures around the outside of said enclosure in a plane substantially perpendicular to said longitudinal axis of said output shaft;
  • a cam-actuated timer switch comprising:'
  • a cam means including a primary cam carried by said output shaft and having two cam tracks separated by a gear, a secondary cam member carried on a second shaft disposed substantially parallel to said output shaft and having two cam tracks separated by a gear, said gears engaging one another.
  • an electrical switching means responsive to said cam means including a long and short set of contact-carrying blades wherein said long set of contact-carrying blades is located on one side of a line through the centers of said primary and secondary cam members, and said short set of contactcarrying blades is located on the other side of said line;
  • an enclosure substantially enveloping said cam and electrical switching means comprising a cupshaped housing and a substantially thin flat cover closing same, said cup-shaped housing having a plurality of slots disposed in a side wall thereof in which are disposed said long and short contact carrying blades;
  • a cam-actuated timer switch comprising:
  • a cam means including a primary cam carried by said output shaft and having two cam tracks separated by a gear, a secondary cam member carried on a second shaft disposed substantially parallel to said output shaft and having two cam tracks separated by a gear, said gears engaging one another.
  • an electrical switching means reponsive to said cam means including a long and short set of contact-carrying blades wherein said long set of contact-carrying blades is located on one side of a line through the centers of said primary and secondary cam members, and said short set of contactcarrying blades is located on the other side of said line, both said long and short set maintained in spaced relation to each other by a contact spacing means;

Landscapes

  • Measurement Of Predetermined Time Intervals (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Electromechanical Clocks (AREA)
US00346313A 1973-03-30 1973-03-30 Cam-actuated timer switch Expired - Lifetime US3814874A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00346313A US3814874A (en) 1973-03-30 1973-03-30 Cam-actuated timer switch
AU67182/74A AU6718274A (en) 1973-03-30 1974-03-27 Timer switch
CA196,089A CA1001700A (en) 1973-03-30 1974-03-27 Cam-actuated timer switch
DE2415375A DE2415375A1 (de) 1973-03-30 1974-03-29 Durch nocken betaetigter zeitschalter
BR2508/74A BR7402508D0 (pt) 1973-03-30 1974-03-29 Temporizador atuado por excentrico
JP49034779A JPS5052573A (fr) 1973-03-30 1974-03-29
ES424790A ES424790A1 (es) 1973-03-30 1974-03-29 Interruptor temporizador accionado por levas.
FR7411211A FR2223818B1 (fr) 1973-03-30 1974-03-29
IT68019/74A IT1009409B (it) 1973-03-30 1974-03-29 Interruttore elettrico a tempo con azionamento a camma
GB1431874A GB1466083A (en) 1973-03-30 1974-04-01 Cam-actuated timer switch
ES446884A ES446884A1 (es) 1973-03-30 1976-04-09 Mejoras introducidas en interruptores temporizadores accio- nados por levas.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00346313A US3814874A (en) 1973-03-30 1973-03-30 Cam-actuated timer switch

Publications (1)

Publication Number Publication Date
US3814874A true US3814874A (en) 1974-06-04

Family

ID=23358835

Family Applications (1)

Application Number Title Priority Date Filing Date
US00346313A Expired - Lifetime US3814874A (en) 1973-03-30 1973-03-30 Cam-actuated timer switch

Country Status (10)

Country Link
US (1) US3814874A (fr)
JP (1) JPS5052573A (fr)
AU (1) AU6718274A (fr)
BR (1) BR7402508D0 (fr)
CA (1) CA1001700A (fr)
DE (1) DE2415375A1 (fr)
ES (2) ES424790A1 (fr)
FR (1) FR2223818B1 (fr)
GB (1) GB1466083A (fr)
IT (1) IT1009409B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305007A1 (fr) * 1975-03-21 1976-10-15 Mallory & Co Inc P R Minuterie
FR2391436A1 (fr) * 1977-05-16 1978-12-15 Amf Inc Systeme de commande de degivrage a minuterie pour refrigerateur
US4130746A (en) * 1977-04-11 1978-12-19 Whirlpool Corporation Snap-action cam for timer switch
US4297547A (en) * 1978-12-14 1981-10-27 Emhart Industries, Inc. Miniature timing mechanism
US4381432A (en) * 1981-06-01 1983-04-26 General Electric Company Electromechanical timer with improved short interval accuracy
US4493955A (en) * 1983-04-18 1985-01-15 Colman Oem, Inc. Control mechanism for an electric motor assembly
US4525608A (en) * 1982-12-03 1985-06-25 General Electric Company Timer mechanism with improved interval accuracy
US5834718A (en) * 1997-03-03 1998-11-10 Emerson Electric Co. Appliance timer having a switching mechanism for high-current carrying circuit blades and associated method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5381381U (fr) * 1976-12-08 1978-07-06
DE8711023U1 (de) * 1987-08-13 1987-09-24 Grässlin KG, 7742 St Georgen Abstandhalter für einen elektrischen Kontaktfedersatz

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877317A (en) * 1957-02-05 1959-03-10 Gen Electric Switching mechanism for timer
US3319198A (en) * 1965-06-21 1967-05-09 Johnson Matthey & Mallory Ltd Miniature telephone interrupter switch
US3478181A (en) * 1966-03-10 1969-11-11 Edward Thomas Buckerridge Electric circuit controllers incorporating time-switches
US3727015A (en) * 1971-04-12 1973-04-10 Mallory & Co Inc P R Cam operated program timer assembly with replaceable leaf spring contact structure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143935Y2 (fr) * 1971-03-02 1976-10-25
JPS5223807Y2 (fr) * 1971-04-30 1977-05-31

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877317A (en) * 1957-02-05 1959-03-10 Gen Electric Switching mechanism for timer
US3319198A (en) * 1965-06-21 1967-05-09 Johnson Matthey & Mallory Ltd Miniature telephone interrupter switch
US3478181A (en) * 1966-03-10 1969-11-11 Edward Thomas Buckerridge Electric circuit controllers incorporating time-switches
US3727015A (en) * 1971-04-12 1973-04-10 Mallory & Co Inc P R Cam operated program timer assembly with replaceable leaf spring contact structure
US3727015B1 (fr) * 1971-04-12 1987-08-18

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305007A1 (fr) * 1975-03-21 1976-10-15 Mallory & Co Inc P R Minuterie
US4130746A (en) * 1977-04-11 1978-12-19 Whirlpool Corporation Snap-action cam for timer switch
FR2391436A1 (fr) * 1977-05-16 1978-12-15 Amf Inc Systeme de commande de degivrage a minuterie pour refrigerateur
US4297547A (en) * 1978-12-14 1981-10-27 Emhart Industries, Inc. Miniature timing mechanism
US4381432A (en) * 1981-06-01 1983-04-26 General Electric Company Electromechanical timer with improved short interval accuracy
US4525608A (en) * 1982-12-03 1985-06-25 General Electric Company Timer mechanism with improved interval accuracy
US4493955A (en) * 1983-04-18 1985-01-15 Colman Oem, Inc. Control mechanism for an electric motor assembly
US5834718A (en) * 1997-03-03 1998-11-10 Emerson Electric Co. Appliance timer having a switching mechanism for high-current carrying circuit blades and associated method

Also Published As

Publication number Publication date
ES446884A1 (es) 1977-06-01
FR2223818B1 (fr) 1977-09-30
GB1466083A (en) 1977-03-02
CA1001700A (en) 1976-12-14
DE2415375A1 (de) 1974-10-24
BR7402508D0 (pt) 1974-11-19
FR2223818A1 (fr) 1974-10-25
AU6718274A (en) 1975-10-02
IT1009409B (it) 1976-12-10
ES424790A1 (es) 1976-09-01
JPS5052573A (fr) 1975-05-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EMERSON ELECTRIC CO. A CORP. OF MISSOURI, MISSO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT;REEL/FRAME:005691/0720

Effective date: 19910125