CA1153408A - Electrical switch operating timing mechanism - Google Patents
Electrical switch operating timing mechanismInfo
- Publication number
- CA1153408A CA1153408A CA000419373A CA419373A CA1153408A CA 1153408 A CA1153408 A CA 1153408A CA 000419373 A CA000419373 A CA 000419373A CA 419373 A CA419373 A CA 419373A CA 1153408 A CA1153408 A CA 1153408A
- Authority
- CA
- Canada
- Prior art keywords
- carried
- pair
- base portion
- cam
- timing mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Abstract
ELECTRICAL SWITCH OPERATING TIMING MECHANISM
ABSTRACT OF THE DISCLOSURE
A combination of a housing with a timing mechanism and a motor drive including a gear train which includes a rotating member carried by a shaft. The housing comprises a cup shaped member having a base portion, a pair of sidewalls, a pair of end walls and an open end. A plate closes the open end and has an opening through which the rotating member protrudes.
First and second pairs of opposed individual ribs are provided in the side walls and each have slots therein.
Individual plates are carried in the slots and means carried by the plates receiving the shaft. Apertures are provided in the base portion and receive electrical terminals carried by the base portion and at least one output member from the gear train carried by the base portion.
ABSTRACT OF THE DISCLOSURE
A combination of a housing with a timing mechanism and a motor drive including a gear train which includes a rotating member carried by a shaft. The housing comprises a cup shaped member having a base portion, a pair of sidewalls, a pair of end walls and an open end. A plate closes the open end and has an opening through which the rotating member protrudes.
First and second pairs of opposed individual ribs are provided in the side walls and each have slots therein.
Individual plates are carried in the slots and means carried by the plates receiving the shaft. Apertures are provided in the base portion and receive electrical terminals carried by the base portion and at least one output member from the gear train carried by the base portion.
Description
i3gt~3 BACKGROUND OF THE INVENTION
Generally speaking, the present invention pertains to improvements in a timing mechanism wherein coupled drum wheels of a digital interval timer are rotatably set at a predetermined period of time' wherein at least one cam having a notch opening to an outer periphery o~
the cam is rotatably coupled to at least one of the drum wheels; and wherein an actuator means engages the cam to open and close an electrical switch, the switch opening when the actuator means d~ops into the notch, an improve-ment characterized by the actuator means including a pivoting member pivotally mounted with respect to the notch, the pivotally mounted member and the notch provide means such that a resultant force vector between the notch and the pivoting member when they are engaged is in a direction away from the notch and means wherein the drum wheels may be rotated in aither direction after the elec-trical switch has been opened.
Another improvement relates to a case for the timing mechanism which, in general, comprises a cup shaped member having a base portion, a pair of side walls, a pair of end walls, and an open end, a base plate closing the open end and having an opening through which the drum wheels pro-trude, individual ribs in the side walls each having slots the~ein, individual plates carried in the slots and means carried by the plates receiving the drum wheels and the drum shaped helical cam, and apertures in the base portion receiving electrical te~minals carried by the base portion, and at least one output member from a gear train of a motor drive means carried by the base portion.
The present invention relates to a timing mechanism and more particularly to a timing mechanism usiny a digital interval timer.
~L~34~6~3 Timing mechanisms utilizing digital interval timers have been used for many years in appliances such as ovens and ranges and in recent years in appliances such as microwave ovens.
In most, if not all of such applications, drum wheels having coded indicia to indicate time are rotatably coupled together through commonly used geneva gear drives. Also cams are usually coupled to the drum wheels for rotation with the wheels to open and close electrical switches. Such cams usually employ a notch to actuate a cam follower with the cam follower falling into the notch. One of the problems iO with such an arrangement is that of being unable to rotate the drum wheelsin either direction when the cam follower is in the notch. This then causes the operator, in many instances, to rotate the drum wheels many turns when a new time needs to be set.
In microwave oven applications, it has been found to be, at times, necessary to provide an auxiliary program in addition to the normal program usually required for cooking times. More specifically, it has been found to be highly desirable, if not necessary, to vary the power to the magnetron of the microwaven oven during certain cooking time periods.
The type of timing mechanisms discussed herein also have a "packaging problem" in that they are inherently complicated and therefore somewhat difficult to assemble.
The present invention is directed to features of digital interval timing mechanisms which solve these problems.
FEATURES OR OBJECTS OF THE INVENTION
Accordingly, it is a feature of the invention to provide a timing mechanism wherein drum wheels provide a digital interval timer and wherein cams are coupled to the drum wheels to actuate cam followers to open and-close electrical switches. Another feature of the invention is to provide for such a timing mechanism wherein the drum wheels may 3~
be rotated in either direction even when the cam follower drops in the notch. Another feature of the invention is the provision of such a timing mechanisnl wherein the notch and the cam follower are constructed and arranged so that the resultant force vector between the notch of the rotating cam and the cam follower when they are engaged is in a direction away From the notch regardless of the direction of the cam's rotation.
Still another feature of the invention is the provision of such a timing mechanism where there is a means to provide an auxiliary program other than the normal program of the timing mechanism. Yet another feature of the invention is the provision of such a timing mechanism wherein such means includes a drum shaped helical cam, a cam follower, means to provide relative axial movement between the drum shaped helical cam and the cam follower. Another feature of the invention is the provision of such a timing mechanism wherein power driven rotation of the drum shaped helical cam is provided by the same means that provide power driven rotation to the drum wheels.
Another feature of the invention is the provision of such a timing mechanism wherein the elements of the mechanism are packaged within a housing such that the mechanism is relatively easy to assemble. Another feature of the invention is the provision of such a timing mechanism wherein the housing includes a cup shaped member with an open end with ribs in its side walls to receive a frame carrying the drum wheels and the drum shaped helical cam. Yet another feature of the invention is the provision of such a timing mechanism wherein apertures are provided in the cup shaped member to receive electrical terminals carried by the cup shaped member and at least one output member of a motor drive carried by the cup shaped member~
These and other features of the invention will be apparent from the following description taken in conjunction with the accompanying drawings.
~.~534~
DETAILED DESC~IPTION OF THE DRAI~I~IGS
Figure 1 is an exploded view of a timing mechanism employing the features of the invention.
Figure 2 is a top view of the mechanism in partial cross-section.
Figure 3 is an end view of the timing mechanism in partial cross-section.
Figure 4 is a view taken along the line 4-4 of Figure 3.
DESCRIPTION OF THE INVENTIO~I
Referring now to the drawings, there is shown a timing mechanism 10 employing the features of the invention. In general, the timing mechanism includes a plurality of drum wheels 11, 12 and 13 rotatably carried on a shaft 14, a plurality of cams 16, 18 and 20 carried on shaft ! 14 and coupled to the individual drum wheels, cam followers 22, 24 and 26 which are actuated by the cams to open and close electrical switches in a manner well known in the art. Each of the drum wheels has coded indic;a on their outer periphery to indicate time periods. In the present embodiment, drum wheel 11 indicates. tens of minutes, drum wheel 12 indicates minutes and drum wheel 13 indicates seconds. The drum wheels are coupled together such that drum wheel 13 drives drum wheel 12 and drum wheel 12 drives drum wheel 11 through individual geneva drives 34, 38, 41 and 42 carried on shaft 14, and 36 and 40 carried on shaft 15. The operation of geneva drives are well known in the art and since the drum wheels and their geneva drives do not form part of the invention, a detailed description and drawings have been omitted for the sake of simplicity.
As better shown in Figure 2, power driven rotation is applied to the drum wheels from motor 44, through gear train 46 to an output pinion 48 to a gear 50 which is rotatably carried on shaft 52 and fixedly connected to face gear 54 which in turn engages gear 56 which is interyral with drum wheel 13. A desired cooking cycle may be set by axially indexiny 3~Q~
shaft 52 "in" to move face gear 54 out o~ engagement ~ith gear 56 against spring 55 and move face gear 58 into engagement with gear 56 and rotating the shaft. After setting the drum wheels, shaft 52 is released and face gear 54 again engages 56 through the expansion of spring 55. Spacer 60 separates face gears 54 and 58. A thumb wheel 62 provided on drum wheel 11 reduces the number of setting rotations of shaft 52.
Cams 16, 18 and 20 are substantially the same and therefore the description with regard to cam 16 of Figure 3 and cam 18 of Figure 4 applies to cam 20. Each of the cams are carried on an individual drum wheel, cam 16 on drum wheel 11, cam 18 on drum wheel 12 and cam 20 on drum wheel 13. As shown, each of the cams includes an outer periphery 16' and a notch 16" opening to the outer periphery. Cam followers 22, 24 and 26 (Figure 1) engage cams 16, 18 and 20, respectively through V-shaped followers 22', 24' and 26'. The cam followers are carried on a sleeve 28 which is rotatably carried on a shaft 30. Since the followers act as a unit in that a switch is only to be opened or closed when a certain time period is met, all three followers will be in the same mode at a given time. At any particular time, switch actuator 32 of ~ollower 24 actuates blades 25 and 27 to open or close an electrical circuit to terminals 32' and 32" (Figure 2) to provide a program sequence. As shown in Figure 4, cam follower 24 is spring biased toward cam 16 by spring 31 which is attached to the follower and to plate 33 to provide a fast drop of the cam follower into notch 16". Since cam followers 22, 24 and 26 are all carried on sleeve 28, cam followers 24 and 26 are also pro\lidèd with a fast drop from the action of the spring 31.
As better shown in Figure 3, an alarm means 35 is associated with cam fo~lower 22 to provide an alarm when the follower drops into notch 16". Alarm means 35 includes a bell 37 and hammer 39 which is pivotaly Mounted on cam follower 22 at pivot 41 and which is spring biased against the cam follower through coil spring 43 that is blased against a side 45 3~
of the cam follower. ~Ihen the cam follower drops into notch 16", the side 45 of the follower Forces the hamlller to pivot and strike the bell.
Accordjng ~o a feature of the invention, the cam follo~Jers and the notches 16" of ~he cams are in operable relation to each other so that drum wheels 11, 12 and 13 may be rotated in either direction even though the cam followers have dropped into the notches. More specifically, notches 16" and the cam followers are V-shaped and the pivot point of the cam followers, that is shaft 30, are in plane opposite the opening of the notches when the cam followers are engaged in the notches. This results in a resultant force vector between the notch of the rotating cam and the cam follower when they are engaged that is in a direction away from the notch regardless of the direction of cam rotation.
With reference to Figures 1 and 2, according to another feature of the invention, an auxiliary program is provided by another program means - 70. Program means 70 includes a drum shaped helical cam 72 that is axially slideable on shaft 74, the cam being rotatable with the shaft through the shafts flat portion 76. Power driven rotation is applied to shaft 74 from motor 44 through gear train 46 to output pinion 78 of the gear train which engages face gear 80, face gear 80 being fixedly carried on the shaft. There is a small amount of axial "play" in shaft 74 so ) that engagement between the face gear and pinion 78 can be insured through spring 82 that is biased between the face gear and plate 84. Thus drum wheels 11, 12 and 13 with their respective cams 16, 18 and 20 and helical cam 7`2 are rotatably driven off the same power source. Helical cam 72 includes a helical cam lobe 72' which engages cam follower 86 which is pivotaly mounted on shaft 30. The helical cam may be manually ax1ally moved on shaft 74 to provide a desired setting of cam lobe 72' with respect to cam follower 86. Such manual setting is accomplished by actuator means 88.
Actuator means 88 includes a slider composed of a block 92 slideably carried in a slot 94 of a front plate 33, a handle 98 to manually move the block, 3~ 3~
and a yok'e 100 extending from the block and engaging a groove 102 provided in helical cam 72. Manually axial~y moving the slider sets the position of the helical cam with respect to cam follower 86.
Rotation of cam 72 causes cam follower 68 to open and close electrical circuits to switches 104 and 106 (Figure 2) through d switch actuator block 108 (Figure 1) attached to'the cam follower and having two lobes 110 and 112 for engaging contact blades (not shown). Thus an auxiliary program is provided for the timing mechanism.
Another feature of the invention pertains to the manner in which the timing mechanism is packaged. ~s will be apparent, the mechanism is packaged so that the unit as a whole is very easy to assemble. Referring in particular to Figures 1 and 2, the timing mechanism is enclosed in a housing which includes a cup shaped plastic member 120 having a base portion 122, a pair of end sidewalls 124 and 126, a pair of side walls 123 and 125, and a plate 96 closing the open end of the cup shaped member.
Plate 33 has an opening 128 through which drum wheels 11, 12 and 13 protrude.
Two pairs of opposed ribs, 130 and 132, are provided in the opposed side walls 123 and 125 (half of each pair shown). In each rib there are slots 134 and 136 provided in the ribs (half of each pair shown) for receiving plates 84 and 84'. As better shown in Figure 1, plates 84 and 84' provide frames for receiving shafts 14, 15 and 74 with their associated mechanism. Plate 84 is located between the end walls while plate 84' is formed as part of an end wall. To assemble the timing mechanism, the various elements are first assembled on'their respective shafts and'the shafts are inserted in apertures 138, 140, 142, 144 of plate 84 then the shafts are inserted in corresponding apertures of plate 84" to form a single modular unit. The plates are then inserted in the slots and then 33 96 is positioned to close the open end of the cup shaped member.
~L~S3~
Base portion 122 of cup shaped member 120 carries motor 44 and gear train 46 as ~ell as electrical terminals 32', 104 and 106 and bell 35 these being apertures 146 in the base portion to receive at least one output member of the gear train.
This is a division of Canadian patent application Serial No. 365,079 filed November 20, 1980.
~O
`30
Generally speaking, the present invention pertains to improvements in a timing mechanism wherein coupled drum wheels of a digital interval timer are rotatably set at a predetermined period of time' wherein at least one cam having a notch opening to an outer periphery o~
the cam is rotatably coupled to at least one of the drum wheels; and wherein an actuator means engages the cam to open and close an electrical switch, the switch opening when the actuator means d~ops into the notch, an improve-ment characterized by the actuator means including a pivoting member pivotally mounted with respect to the notch, the pivotally mounted member and the notch provide means such that a resultant force vector between the notch and the pivoting member when they are engaged is in a direction away from the notch and means wherein the drum wheels may be rotated in aither direction after the elec-trical switch has been opened.
Another improvement relates to a case for the timing mechanism which, in general, comprises a cup shaped member having a base portion, a pair of side walls, a pair of end walls, and an open end, a base plate closing the open end and having an opening through which the drum wheels pro-trude, individual ribs in the side walls each having slots the~ein, individual plates carried in the slots and means carried by the plates receiving the drum wheels and the drum shaped helical cam, and apertures in the base portion receiving electrical te~minals carried by the base portion, and at least one output member from a gear train of a motor drive means carried by the base portion.
The present invention relates to a timing mechanism and more particularly to a timing mechanism usiny a digital interval timer.
~L~34~6~3 Timing mechanisms utilizing digital interval timers have been used for many years in appliances such as ovens and ranges and in recent years in appliances such as microwave ovens.
In most, if not all of such applications, drum wheels having coded indicia to indicate time are rotatably coupled together through commonly used geneva gear drives. Also cams are usually coupled to the drum wheels for rotation with the wheels to open and close electrical switches. Such cams usually employ a notch to actuate a cam follower with the cam follower falling into the notch. One of the problems iO with such an arrangement is that of being unable to rotate the drum wheelsin either direction when the cam follower is in the notch. This then causes the operator, in many instances, to rotate the drum wheels many turns when a new time needs to be set.
In microwave oven applications, it has been found to be, at times, necessary to provide an auxiliary program in addition to the normal program usually required for cooking times. More specifically, it has been found to be highly desirable, if not necessary, to vary the power to the magnetron of the microwaven oven during certain cooking time periods.
The type of timing mechanisms discussed herein also have a "packaging problem" in that they are inherently complicated and therefore somewhat difficult to assemble.
The present invention is directed to features of digital interval timing mechanisms which solve these problems.
FEATURES OR OBJECTS OF THE INVENTION
Accordingly, it is a feature of the invention to provide a timing mechanism wherein drum wheels provide a digital interval timer and wherein cams are coupled to the drum wheels to actuate cam followers to open and-close electrical switches. Another feature of the invention is to provide for such a timing mechanism wherein the drum wheels may 3~
be rotated in either direction even when the cam follower drops in the notch. Another feature of the invention is the provision of such a timing mechanisnl wherein the notch and the cam follower are constructed and arranged so that the resultant force vector between the notch of the rotating cam and the cam follower when they are engaged is in a direction away From the notch regardless of the direction of the cam's rotation.
Still another feature of the invention is the provision of such a timing mechanism where there is a means to provide an auxiliary program other than the normal program of the timing mechanism. Yet another feature of the invention is the provision of such a timing mechanism wherein such means includes a drum shaped helical cam, a cam follower, means to provide relative axial movement between the drum shaped helical cam and the cam follower. Another feature of the invention is the provision of such a timing mechanism wherein power driven rotation of the drum shaped helical cam is provided by the same means that provide power driven rotation to the drum wheels.
Another feature of the invention is the provision of such a timing mechanism wherein the elements of the mechanism are packaged within a housing such that the mechanism is relatively easy to assemble. Another feature of the invention is the provision of such a timing mechanism wherein the housing includes a cup shaped member with an open end with ribs in its side walls to receive a frame carrying the drum wheels and the drum shaped helical cam. Yet another feature of the invention is the provision of such a timing mechanism wherein apertures are provided in the cup shaped member to receive electrical terminals carried by the cup shaped member and at least one output member of a motor drive carried by the cup shaped member~
These and other features of the invention will be apparent from the following description taken in conjunction with the accompanying drawings.
~.~534~
DETAILED DESC~IPTION OF THE DRAI~I~IGS
Figure 1 is an exploded view of a timing mechanism employing the features of the invention.
Figure 2 is a top view of the mechanism in partial cross-section.
Figure 3 is an end view of the timing mechanism in partial cross-section.
Figure 4 is a view taken along the line 4-4 of Figure 3.
DESCRIPTION OF THE INVENTIO~I
Referring now to the drawings, there is shown a timing mechanism 10 employing the features of the invention. In general, the timing mechanism includes a plurality of drum wheels 11, 12 and 13 rotatably carried on a shaft 14, a plurality of cams 16, 18 and 20 carried on shaft ! 14 and coupled to the individual drum wheels, cam followers 22, 24 and 26 which are actuated by the cams to open and close electrical switches in a manner well known in the art. Each of the drum wheels has coded indic;a on their outer periphery to indicate time periods. In the present embodiment, drum wheel 11 indicates. tens of minutes, drum wheel 12 indicates minutes and drum wheel 13 indicates seconds. The drum wheels are coupled together such that drum wheel 13 drives drum wheel 12 and drum wheel 12 drives drum wheel 11 through individual geneva drives 34, 38, 41 and 42 carried on shaft 14, and 36 and 40 carried on shaft 15. The operation of geneva drives are well known in the art and since the drum wheels and their geneva drives do not form part of the invention, a detailed description and drawings have been omitted for the sake of simplicity.
As better shown in Figure 2, power driven rotation is applied to the drum wheels from motor 44, through gear train 46 to an output pinion 48 to a gear 50 which is rotatably carried on shaft 52 and fixedly connected to face gear 54 which in turn engages gear 56 which is interyral with drum wheel 13. A desired cooking cycle may be set by axially indexiny 3~Q~
shaft 52 "in" to move face gear 54 out o~ engagement ~ith gear 56 against spring 55 and move face gear 58 into engagement with gear 56 and rotating the shaft. After setting the drum wheels, shaft 52 is released and face gear 54 again engages 56 through the expansion of spring 55. Spacer 60 separates face gears 54 and 58. A thumb wheel 62 provided on drum wheel 11 reduces the number of setting rotations of shaft 52.
Cams 16, 18 and 20 are substantially the same and therefore the description with regard to cam 16 of Figure 3 and cam 18 of Figure 4 applies to cam 20. Each of the cams are carried on an individual drum wheel, cam 16 on drum wheel 11, cam 18 on drum wheel 12 and cam 20 on drum wheel 13. As shown, each of the cams includes an outer periphery 16' and a notch 16" opening to the outer periphery. Cam followers 22, 24 and 26 (Figure 1) engage cams 16, 18 and 20, respectively through V-shaped followers 22', 24' and 26'. The cam followers are carried on a sleeve 28 which is rotatably carried on a shaft 30. Since the followers act as a unit in that a switch is only to be opened or closed when a certain time period is met, all three followers will be in the same mode at a given time. At any particular time, switch actuator 32 of ~ollower 24 actuates blades 25 and 27 to open or close an electrical circuit to terminals 32' and 32" (Figure 2) to provide a program sequence. As shown in Figure 4, cam follower 24 is spring biased toward cam 16 by spring 31 which is attached to the follower and to plate 33 to provide a fast drop of the cam follower into notch 16". Since cam followers 22, 24 and 26 are all carried on sleeve 28, cam followers 24 and 26 are also pro\lidèd with a fast drop from the action of the spring 31.
As better shown in Figure 3, an alarm means 35 is associated with cam fo~lower 22 to provide an alarm when the follower drops into notch 16". Alarm means 35 includes a bell 37 and hammer 39 which is pivotaly Mounted on cam follower 22 at pivot 41 and which is spring biased against the cam follower through coil spring 43 that is blased against a side 45 3~
of the cam follower. ~Ihen the cam follower drops into notch 16", the side 45 of the follower Forces the hamlller to pivot and strike the bell.
Accordjng ~o a feature of the invention, the cam follo~Jers and the notches 16" of ~he cams are in operable relation to each other so that drum wheels 11, 12 and 13 may be rotated in either direction even though the cam followers have dropped into the notches. More specifically, notches 16" and the cam followers are V-shaped and the pivot point of the cam followers, that is shaft 30, are in plane opposite the opening of the notches when the cam followers are engaged in the notches. This results in a resultant force vector between the notch of the rotating cam and the cam follower when they are engaged that is in a direction away from the notch regardless of the direction of cam rotation.
With reference to Figures 1 and 2, according to another feature of the invention, an auxiliary program is provided by another program means - 70. Program means 70 includes a drum shaped helical cam 72 that is axially slideable on shaft 74, the cam being rotatable with the shaft through the shafts flat portion 76. Power driven rotation is applied to shaft 74 from motor 44 through gear train 46 to output pinion 78 of the gear train which engages face gear 80, face gear 80 being fixedly carried on the shaft. There is a small amount of axial "play" in shaft 74 so ) that engagement between the face gear and pinion 78 can be insured through spring 82 that is biased between the face gear and plate 84. Thus drum wheels 11, 12 and 13 with their respective cams 16, 18 and 20 and helical cam 7`2 are rotatably driven off the same power source. Helical cam 72 includes a helical cam lobe 72' which engages cam follower 86 which is pivotaly mounted on shaft 30. The helical cam may be manually ax1ally moved on shaft 74 to provide a desired setting of cam lobe 72' with respect to cam follower 86. Such manual setting is accomplished by actuator means 88.
Actuator means 88 includes a slider composed of a block 92 slideably carried in a slot 94 of a front plate 33, a handle 98 to manually move the block, 3~ 3~
and a yok'e 100 extending from the block and engaging a groove 102 provided in helical cam 72. Manually axial~y moving the slider sets the position of the helical cam with respect to cam follower 86.
Rotation of cam 72 causes cam follower 68 to open and close electrical circuits to switches 104 and 106 (Figure 2) through d switch actuator block 108 (Figure 1) attached to'the cam follower and having two lobes 110 and 112 for engaging contact blades (not shown). Thus an auxiliary program is provided for the timing mechanism.
Another feature of the invention pertains to the manner in which the timing mechanism is packaged. ~s will be apparent, the mechanism is packaged so that the unit as a whole is very easy to assemble. Referring in particular to Figures 1 and 2, the timing mechanism is enclosed in a housing which includes a cup shaped plastic member 120 having a base portion 122, a pair of end sidewalls 124 and 126, a pair of side walls 123 and 125, and a plate 96 closing the open end of the cup shaped member.
Plate 33 has an opening 128 through which drum wheels 11, 12 and 13 protrude.
Two pairs of opposed ribs, 130 and 132, are provided in the opposed side walls 123 and 125 (half of each pair shown). In each rib there are slots 134 and 136 provided in the ribs (half of each pair shown) for receiving plates 84 and 84'. As better shown in Figure 1, plates 84 and 84' provide frames for receiving shafts 14, 15 and 74 with their associated mechanism. Plate 84 is located between the end walls while plate 84' is formed as part of an end wall. To assemble the timing mechanism, the various elements are first assembled on'their respective shafts and'the shafts are inserted in apertures 138, 140, 142, 144 of plate 84 then the shafts are inserted in corresponding apertures of plate 84" to form a single modular unit. The plates are then inserted in the slots and then 33 96 is positioned to close the open end of the cup shaped member.
~L~S3~
Base portion 122 of cup shaped member 120 carries motor 44 and gear train 46 as ~ell as electrical terminals 32', 104 and 106 and bell 35 these being apertures 146 in the base portion to receive at least one output member of the gear train.
This is a division of Canadian patent application Serial No. 365,079 filed November 20, 1980.
~O
`30
Claims (3)
1. A combination of a housing with a timing mechanism and a motor drive means including a gear train which includes a rotating member carried by a shaft comprising:
a) a cup shaped member having a base portion, a pair of sidewalls, a pair of end walls, and an open end, b) a plate closing said open end and having an opening through which said rotating member protrudes, c) first and second pairs of opposed individual ribs in said side walls each having slots therein, d) individual plates carried in said slots and means carried by said plates receiving said shaft, and e) apertures in said base portion receiving electrical terminals carried by said base portion and at least one output member from said gear train carried by said base portion.
a) a cup shaped member having a base portion, a pair of sidewalls, a pair of end walls, and an open end, b) a plate closing said open end and having an opening through which said rotating member protrudes, c) first and second pairs of opposed individual ribs in said side walls each having slots therein, d) individual plates carried in said slots and means carried by said plates receiving said shaft, and e) apertures in said base portion receiving electrical terminals carried by said base portion and at least one output member from said gear train carried by said base portion.
2. The combination according to claim 1 wherein at least one of said pair of ribs is provided between said pair of end walls.
3. The combination according to claim 1 wherein one of said pair of ribs is provided between said pair of end walls and the other pair of ribs is provided by a cut away portion in one wall of said pair of end walls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000419373A CA1153408A (en) | 1980-05-12 | 1983-01-12 | Electrical switch operating timing mechanism |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/148,714 | 1980-05-12 | ||
| US06/148,714 US4327259A (en) | 1980-05-12 | 1980-05-12 | Timing mechanism |
| CA000365079A CA1149924A (en) | 1980-05-12 | 1980-11-20 | Electrical switch operating timing mechanism |
| CA000419373A CA1153408A (en) | 1980-05-12 | 1983-01-12 | Electrical switch operating timing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1153408A true CA1153408A (en) | 1983-09-06 |
Family
ID=27166893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000419373A Expired CA1153408A (en) | 1980-05-12 | 1983-01-12 | Electrical switch operating timing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1153408A (en) |
-
1983
- 1983-01-12 CA CA000419373A patent/CA1153408A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |