US3248493A - Latch operated timer switch - Google Patents

Latch operated timer switch Download PDF

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Publication number
US3248493A
US3248493A US327218A US32721863A US3248493A US 3248493 A US3248493 A US 3248493A US 327218 A US327218 A US 327218A US 32721863 A US32721863 A US 32721863A US 3248493 A US3248493 A US 3248493A
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United States
Prior art keywords
lever
latch
arm
operating member
switch
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US327218A
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English (en)
Inventor
Ronald M Bassett
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International Register Co
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International Register Co
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Priority to BE650796D priority Critical patent/BE650796A/xx
Application filed by International Register Co filed Critical International Register Co
Priority to US327218A priority patent/US3248493A/en
Priority to GB25868/64A priority patent/GB1026294A/en
Priority to LU46586D priority patent/LU46586A1/xx
Priority to NL6408564A priority patent/NL6408564A/xx
Priority to DE19641465740 priority patent/DE1465740C/de
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Publication of US3248493A publication Critical patent/US3248493A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/14—Mechanisms continuously running to relate the operation(s) to the time of day
    • G04C23/18—Mechanisms continuously running to relate the operation(s) to the time of day for operating one device at a number of different times
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/14—Mechanisms continuously running to relate the operation(s) to the time of day
    • G04C23/34—Mechanisms continuously running to relate the operation(s) to the time of day with provision for automatic modification of the programme, e.g. on Sunday

Definitions

  • a switch from one position to an alternate position for a short interval of time, such as 15 seconds, and for one or more times during a relatively long period, such as 3 hours, under the control of timing means that is cyclically operable on a 24 hour or daily basis; to arrange for selecting the particular day or days in successive days in which the switch is to be operated in the relatively longperiod; to shift the switch from one position to the alternate position as the result of forward movement of a cam driven with a ratchet wheel by an oscillating index pawl and to return the switch to the one position as the result of reverse movement of the index pawl; to latch a latch lever to a latch arm associated with the switch for shifting the latter to the alternate position under the biasing action of a spring as controlled by the movement of the cam and to unlatch the latch lever from the latch arm under the control of the index pawl with the switch being returned to the one position by another spring; to provide an unlatch lever under the control of the index paw
  • FIG. 1 is a vertical plan view of a time switch embodying the present invention.
  • FIG. 2 is a view, in side elevation, of the time switch shown in .FIG. 1, the view being taken looking from right to left.
  • FIG. 3 is a view, in rear elevation, of the time switch shown in FIG. 1.
  • FIG. 4 is a vertical sectional view taken generally along the line 44 of FIG. 2 and showing the index pawl on the index lever idling in a tooth space on the ratchet wheel.
  • FIG. 4a is an elevational view, at an enlarged scale, of a portion of the ratchet wheel and shows where a tooth has been omitted.
  • FIG. 5 is a view, similar to FIG. 4, but showing the index lever having been moved to move the ratchet wheel beyond the normal extent of movement under the control of the oscillating index pawl.
  • FIG. 6 is a view, in side elevation, of the time switch shown in FIG. 1, the view being taken looking from left to right.
  • FIG. 7 is a view of a portion of the mounting plate and parts carried thereby near its upper end for the purpose of showing the latch lever in the normal unoperated position and ready for operation on engagement therewith by a cam lobe.
  • FIG. 8 is a view, in end elevation, of the shaft to which the rotatable operating member is attached and has mounted thereon the latch arm.
  • FIG. 9 is a view, in side elevation, of the assembly shown in FIG. 8. 4
  • FIGS. 10, 11 and 12 are views, similar to FIG. 7, but showing different positions of the cam lobe and the devices operated thereby. 1
  • FIGS. 13 and 14 are views, at an enlarged scale, to show different positions of a yoke arranged to operate a switch from one position to an alternate position under the control of difierent cam lobes.
  • FIG. 15 illustrates graphically the variably spaced impulses or times of switch operation during the relatively long period in a day that has been pre-selected for effecting the desired sequence of operations and switch closures.
  • FIG. 16 is a sectional view taken generally along the line 16--16-of FIG. 11.
  • FIGS. 17, 18, 19 and 20 are views, similar to FIGS. 7, 10, 11 and 12, and show a modified construction of the latch lever.
  • FIG. 21 is a view, in side elevation and at an enlarged scale, of the latch lever shown in FIGS. 17, 18, 19 and FIG. 22 is a view, in front elevation, of the latch lever shown in FIG. 21, a portion of the mounting plate being shown in section.
  • the reference character 10 designates, generally, a time switch in which the present invention is embodied.
  • the time switch 10 can be mounted in a suitable housing such as that illustrated A. D. Stolle, US. Patent No. 2,839,624, issued June 17, 1958.
  • the time switch 10 includes a metallic mounting plate 11 that is generally rectangular in configuration and is provided with various openings, cut out sections, etc., to facilitate mounting of the various parts of the time switch 10 thereon.
  • a metallic mounting plate 11 mounted on the rear of the plate 11 is an insulating support 12 that is secured in position by screws 13 which extend through an insulating cover 14.
  • Underneath the insulating cover 14 are single pole double throw switches that are indicated, generally, at 15 and 16.
  • the switch 15 includes stationary contacts 17 and 18 from which terminal lugs 19 and 20 extend.
  • a movable contact 21 is arranged to be operated from engagement with stationary contact 17 or from one position into engagement with the other stationary contact 18 or to an while the other end engages a nose 24 of a rotatable operating member 25.
  • the rotatable operating member 25 is rotatably mounted on the insulating support 12 and extends through it and through the mounting plate 11 to the front side thereof in a manner to be described in more detail hereinafter. Stops 26 and 27 on opposite sides of the nose 24 serve to limit the extent of rotary motion of the operating member 25 in either direction.
  • the present invention can be practiced by using only the single pole double throw switch 15 controlled as described hereinafter. However, it may be desirable to provide for additional control functions.
  • the switch 16 can be employed. It comprises stationary contacts 27 and 28 which are connected to terminal lugs 29 and 30. A movable contact 31 is arranged to engage the stationary contact 27 in one position and to be moved to engage the stationary contact 28 in an alternate position. the movable contact 31.
  • a terminal lug 32 is connected to I 3 ployed with its lower end in engagement with the upper end of the movable contact 31 while its upper end engages a nose 34 of a rotatable operating member 35 which, like the member 25, is rotatably mounted on the insulating support 12 and extends through the mounting plate 11 to be rotated in a manner to be described. Stops 36 cooperate with the operating member 35 to limit its rotation in one direction or the other.
  • line terminals 37 and 38 are provided and are arranged to be connected to a suitable source of alternating current such as 115 volt 6O cycle source.
  • a suitable source of alternating current such as 115 volt 6O cycle source.
  • a synchronous motor 39 mounted on the rear side of the mounting plate 11 is a synchronous motor 39, of conventional construction, that is arranged to rotate at a speed determined by the frequency of the alternating current source. It is arranged to drive an output shaft 40 through a suitable gear train.
  • Conductors 41 and 42 serve to connect the synchronous motor 39 for energization to the line terminals 37 and 38.
  • Jumper conductors 43 and 44 are arranged to interconnect certain of the terminal lugs, the particular connections made depending upon the circuits that are to be controlled.
  • switches 15 and 16 can be interconnecting with external circuits that are to be controlled.
  • additional single pole double throw switches similar to the switches 15 and 16, can be mounted on the insulating support 12 and operated by the rotatable operating members 25 and 35.
  • a housing portion 45 integral with the insulating support 12 serves to enclose the line terminals 37 and 38 in order to prevent accidental contact therewith from the front of the time switch 10.
  • the output shaft 40 extends through the mounting plate 11 and carries a pinion 48 that is employed for driving a gear train which is indicated, generally, at 49.
  • the gear train 49 terminates in a pinion 50 that meshes with a gear 51 with the arrangement being such that the gear 51 rotates one revolution during each 24 hours of the day.
  • Rotatable with the gear 51 is a spacing sleeve 52 which is secured to a time dial 53 that is provided with an hours scale along its periphery.
  • the gear 51, sleeve 52 and time dial 53 are slidable axially along a shaft or pin 54 that extends rearwardly from the mounting plate 11.
  • This arrangement is provided in order to permit setting of the time dial 53 to the correct time of day and to disengage the gear 51 from the pinion 50 in order to permit such movement.
  • a coil spring 55 acts to bias the gear 51, sleeve 52 and time dial 53 into the position shown in FIG. 6 where the pinion 50 is in driving engagement with the gear 51.
  • the coil spring 55 is interposed between the time dial 53 and a stationary time dial plate 56 that is mounted on the shaft or pin 54.
  • a portion of the time dial plate 56 is visible plate 64 rotates through a complete revolution its shoulder 65 engages one of the teeth 66 on the skipper dial 67 and advances it to the next position.
  • skipper pins 69 Slidably mounted on the skipper dial 67 are skipper pins 69 which are movable parallel to the axis of rotation of the skipper dial 67.
  • seven skipper pins 69 are shown in FIG. 1 of the drawings, one pin for each day of the week.
  • other numbers such as twelve, can be through a window 57, FIG. 1, in an operation time plate 58 that is held in position by a screw 59 but which, when the screw 59 is loosened, can be rotated for the purpose of shifting an index 60 relative to the time scale on the stationary time dial plate 56 for the purpose of setting the time at which the relatively long period, referred to hereinbefore, is to begin in a 24 hour period.
  • Another index 61 is carried by the operation time plate 58 in order to facilitate positioning of the time dial 53 to the correct time of day.
  • a tripper plate 64 is positioned between the gear 51 and the time dial 53 and extends radially as seen more clearly in FIG. 5 of the drawings.
  • the tripper plate 64 has an outer shoulder 65, FIG. 6, that is arranged to engage the teeth 66 on a skipper dial 67 that is rotatably mounted on a shaft or pin 68 that extends from the mounting plate 11. It will be understood that each time that the tripper used where it is desired to have the switch operation to take place every other day or every three days or four days, etc., as may be desired.
  • a shoulder 71 that is arranged to engage a drive arm 72, FIGS. 4 and 5, that is located on an outer branch of a U-shaped tripper lever 73 which is mounted for rotation on a shaft or pin 74 that extends from the mounting plate 11.
  • a notch 75 in the tripper plate 64 permits the latter to move readily past the drive arm 72 when the time dial 53 is moved outwardly for time setting purposes.
  • the tripper lever 73 which is of U-shape, is provided with a driven arm 80 that forms a part of the branch opposite the branch carrying the arms 72 and 79.
  • the driven arm 80 is arranged to engage an outstanding tongue 81 that forms a part of an index lever 82 which is mounted for both rotary and translatory movement on the shaft or pin 74.
  • the index lever 82 Near its upper end the index lever 82 carries an index pawl 83 and it is arranged to be oscillated by the driven arm 80 on engagement with the outstanding tongue 81 to an extent that is substantially greater than the extent through which it is moved under the control of an eccentric cam 84 which is driven through the gear train 49 by the synchronous motor 39.
  • the arrangement is such that the eccentric cam 84 rotates once every one and one half minutes and thereby effects a corresponding forward and reverse movement of the index lever 82 and index pawl 83 carried thereby during this interval.
  • the eccentric cam 84 continues to operate the index lever 82 and to oscillate the index pawl 83.
  • the eccentric cam 84 cooperates with a slot 85 in the lower end of the index lever 82.
  • a coil tension spring 86 is secured to the upper end of the index lever 82 at 87. At its lower end the coil tension spring 86 is secured to the bottom of the U-shaped tripper lever 73 at 88. In this manner the tripper lever 73 is normally biased to the position shown in FIG. 4 and I the index lever 84 is normally biased downwardly to the position shown in this figure.
  • the index pawl 83 is arranged to engage ratchet teeth 89 that are located on the periphery of a ratchet wheel 90 which is rotatably mounted on a shaft or pin 91 that extends from the mounting plate 11.
  • the arrangement is such that the index lever 82 and index pawl 83 are oscillated through an extent sufficient to engage and move one of the ratchet teeth 89 and therewith the ratchet wheel 90 through an angular extent corresponding to the length of the individual ratchet tooth 89.
  • ratchet teeth 89 are uniformly positioned around the periphery of the ratchet wheel 90 and, for illustrative purposes, one hundred twenty three ratchet teeth 89 are so positioned, once the index lever 82 starts to rotate the ratchet wheel 90, it requires slightly more than three hours for a complete rotation of it to be effected.
  • a retaining pawl 92 Cooperating with the ratchet wheel 90 is a retaining pawl 92 that is rotatably mounted on the shaft or pin 74.
  • the retaining pawl 92 carries teeth 93 that are arranged to engage the teeth 89 of the ratchet wheel 90 which are opposite it for the purpose of preventing reverse rotation of the ratchet wheel 90.
  • a spring 94 acts to bias the retaining pawl 92 into engagement with the ratchet wheel 90.
  • One end of the spring 94 is connected to a notched end 95 of the retaining pawl 92.
  • the other end of the spring 94 is anchored to the shaft or pin 68 as shown in FIGS. 4 and 5 of the drawings.
  • the retaining pawl 92 which is in the form of a lever pivoted intermediate its ends is positioned on the shaft or pin 74 in overlying relation to the index lever 82 and between it and the rear branch of the tripper lever 73.
  • a lug 96 that is struck from the mounting plate 11.
  • a similar lug 97 is struck from the mounting plate 11 for the purpose of guiding the upper end of the index lever 82 in its rotary and translatory movement under the control of the eccentric cam 84 or under the control of the driven arm 80 in the manner previously described.
  • the ratchet wheel 90 is provided with the ratchet teeth 89 along its periphery except for the tooth space 98.
  • one of the ratchet teeth 89 is omitted in providing the tooth space 98.
  • the purpose of it is to permit the index lever 82 to idle and move the index pawl 83 through the extent caused by the rotation of the eccentric cam 84, which is continuous, without causing any rotation of the ratchet wheel 90.
  • the tripper plate 64 is effective to have the shoulder 71 engage the drive arm 72 of the tripper lever 73. This causes rotation of the tripper lever 73 and therewith the movement of the driven arm 80 into engagement with the outstanding tongue 81 on the index lever 82.
  • the effect of this operation is to move the index lever .82 through an extent that is substantially greater than it is moved by the eccentric 84. Accordingly, on the counterclockwise rotation of the tripper lever 73, FIG. 5, the index lever 82 s moved from its position shown in FIG. 4 more than the angular distance of one of the ratchet teeth 89.
  • an arm 99 is provided on the index lever 82 for manual movement.
  • the arm 99 extends through an opening 100 in an upper bearing plate 101 Y which is secured, in part, by a screw 102 to a stud 103 that extends from the mounting plate 11.
  • the outer end of the shaft or pin 74 extends through a slot in the lower end of the upper bearing plate 101 and serves as a support therefor.
  • An arrow 104 located on the upper bearing plate 101 indicates the direction in which the arm 99 is to be moved manually in the opening 100 to effect the forward movement of the index lever 82 sufficient to advance the ratchet wheel 90 slightly more than one tooth or in the same manner that it is advanced by the tripper plate 64 in timed relation.
  • index 105 that registers with one of the skipper pins 69 on the skipper dial 67.
  • the index 105 shows the par ticular day corresponding to the skipper pin 69 in alignment therewith. Thus, if seven skipper pins 69 are employed, as shown, the index 105 points to the particular day of the week during which the time switch 10 is operating.
  • Rotatable with the ratchet wheel 90 is a stack of cams that is indicated, generally, at 107 in FIGS. 1, 2 and 6 of the drawings.
  • the stack of cams 107 is held in position for rotation on the shaft or pin 91 by an internally threaded screw 108 that extends through a knob 109 which facilitates manual rotation of the stack of cams 107.
  • the stack of cams 107 comprises generally circular cams 111, 112, 113, 114 and 115, the latter being a part of the knob 109.
  • These cams are individually adjustable relative to each-other in order to variably position cam lobes 116, 117, 118, 119 and 120 which form integral parts of and extend radially from the cams 111, 112, 113 and 114 and 115, respectively.
  • cam lobes 116, 117, 118, 119 and 120 which form integral parts of and extend radially from the cams 111, 112, 113 and 114 and 115, respectively.
  • the corresponding two cams which are adjacent, preferably are secured together by adhesive means, for example, in order to insure that the cam lobes remain in registry.
  • The. cam lobes are arranged to operate a generally U-shaped latch lever 123, FIG. 16, that is mounted for rotary and translatory movement.
  • the U-shaped. latch lever 123 has a flat bottom 124 and front and rear arms 125 and 126 that are provided with slots 127 and 128, respectively, to permit the rotary and translatory movement.
  • the latch lever 123 is mounted on a shaft 129, FIGS. 8 and 9, which extends from and is rotatable with the operating member 25 which controls the operation of the switch 15. It will be observed that the reduced diameter end portion 130 of the shaft 129 projects through the slot 127 in the front arm 125 and through a suitable opening in the upper bearing plate 101, FIG. 1, wherean E shaped spring washer 131 serves as an additional means for holding the upper bearing plate 101 in position.
  • the forward edge 132, FIG. 7, of the flat bottom 124 constitutes a cam follower that is arranged to be contacted successively by the cam lobes 116, 117, 118, and 119 as they are moved in a stepwise fashion along with the ratchet wheel 90 under the control of the index lever 82 in the manner previously described.
  • FIG. 7 shows the-unoperated position of the U-shaped latch lever 123 with the operating member 25, FIG. 3, in a position that may be termed one position of he switch 15.
  • this invention'provision is made for rotating the operating member 25 to the alternate position to shaft the movable contact 21 from engagement with the stationary contact 17 into contact engagement with the stationary contact 18 for a relatively short time, such as fifteen seconds.
  • This is acoorn? plished, in part, by engagement of one of the cams, for example the cam lobe 1-16, with the cam follower forward edge 132 of the latch lever 123 as shown in FIG. 10.
  • the latch lever 123 is moved upwardly and rotated as permitted by the slots 127 and 128 in the front and rear arms 125 and 126.
  • a notch 133 in the rear arm 126 is moved into registry with a forwardly extending section 134 of a latch arm 135, FIGS. 8 and 9, that is secured to and rotates with the operating member 25.
  • the latch arm 135 is provided with a hook 136.
  • a relatively weak coil tension spring 137 is connected to the hook 136 at the distal end of the latch 135. The other end of the spring 137 is anchored to a shaft or pin 138 that extends from. the metallic mounting plate 11.
  • the coil tension spring 137 acts to bias the operating member 25 to the position shown in FIG. 3 where the movable contact 21 engages the stationary contact 17 in what is considered to be one position of the switch 15.
  • the rotation of the latch lever 123 by engagement of the cam lobe 116 with the forward edge 132 is opposed by a relatively strong coil tension spring 139 one end of which is fastened at 140 to the rear edge portion of the fiat bottom 124 of the latch lever 123 while the other end is anchored to the shaft or pin 138.
  • the coil tension spring 139 acts to bias the latch lever 123 in a clockwise direction. Such movement is limited by a tongue 141 on engagement with the stud 103 as shown in FIG. 7.
  • an unlatch lever 143 is provided and it is pivotally mounted on the shaft or pin 138.
  • the unlatch lever 143 has an outstanding detent 144 from a generally horizontally extending arm 145 that is arranged to engage a curved surface 147 on the rear arm 126 of the latch lever 123.
  • the unlatch lever 143 is arranged to be rotated in a clockwise direction for effecting this movement of the latch lever 123.
  • the unlatch lever 143 is provided with a downwardly extending arm 148 having a hook 149 at its distal end to which one end of a coil tension spring 150 is attached.
  • the other end of the coil tension spring 150 is anchored in an opening 151 in the mounting plate 11.
  • the shoulder 153 engages the detent 152 and rocks the unlatch lever 143 in a counterclockwise direction as shown in FIG. 10.
  • the unlatch lever 143 is again rocked in the counterclockwise direction as shown in FIG. 11.
  • the shoulder 153 moves downwardly and permits the spring to rock the unlatch lever 143 in a clockwise direction.
  • FIG. 15 illustrates graphically the operation of the movable contact 21 into and out of engagement with the stationary contact 18.
  • the next current impulse 157 depends upon the angular spacing of the cam lobe 117 from the cam lobe 116. For example it may be so spaced that there is a sixty minute interval between the impulses 156 and 157. In like manner the cam lobe 118 causes the current impulse 158 and it may be so spaced that there is a twenty minute interval between the current impulses 157 and 158. Finally the cam lobe 119 causes the current impulse 159 which may occur thirty minutes after the current impulse 158 has occurred. Thereafter the broken line 160 indicates a passage of one or more days before the operation is repeated and the current impulses 156, 157, 158 and 159 caused during a succeeding predetermined day, depending upon the adjustment of the time switch'10.
  • the single pole double throw switch 16 is provided together with its operator 35. However, provision is made for shifting the movable contact 31 of the switch 16 only once for each revolution of the ratchet wheel 90.
  • operating member 35 is essentially the same in construction as the operating member 25, shown in FIG. 9, and it has extending therefrom and rotatable therewith a shaft 162, FIG. 2, that corresponds to the shaft 129.
  • the shaft 162 has a reduced diameter end portion 163 that extends through the upper bearing plate 101 and to which an E-shaped spring washer 164 is secured.
  • Telescoped with the shaft 162 and rotatable therewith and with the operating member 35 is a sleeve 161 to the forward end of which a yoke 165, FIGS. 7, 13 and 14, is secured.
  • a yoke 165 occupies the position shown in FIGS. 7 and 14 with the operating member 35 in the position shown in FIG. 3- and the movable contact 31 in engagement with the stationary contact 27.
  • the arrangement is such that the operating member 35 tends to remain in either the one position shown in FIG. 3 or in the alternate position where the movable contact 31 is in engagement with the stationary contact 28.
  • the yoke 165 is provided with an arm 166 that carries a rearwardly extending flange 167.
  • the cam lobe 119 engages the rearwardy extending flange 167, as shown in FIGS. 12 and 13, and, on continued rotation in a clockwise direction, rocks the yoke 165 in a counterclockwise direction. This is accompanied by rotation of the operating member 35 from the position shown in FIG. 3 to the alternate position. In this position of the operating member 35 the movable contact 31 is shifted out of engagement with the stationary contact 27 and into engagement with the stationary contact 28.
  • the yoke 165 is rocked in a counterclockwise direction.
  • it is provided with an arm 168 that has a forwardly extending flange 169 which is arranged to be engaged by the cam lobe 120.
  • thefaperating member 35 is rocked back from the alternate position to the one position shown in FIG. 3. This is accompanied by a shift of the movable contact 31 from engagement with stationary contact 28 back into engagement with stationary contact 27.
  • the particular use that is made of the operation of the switch 16 in the manner described depends upon the particular circuits that are to be controlled and which form no part of the present invention.
  • FIGS. 13 and 14 show in more detail the manner in which the yoke 165 operates.
  • FIG. 13 shows how the cam lobe 119 engages the rearwardly extending flange 167 on the arm 168 and rocks the yoke 165 in a clockwise direction.
  • the cam lobe 120 engages the forwardly extending flange 169 on the arm 168 and rocks the yoke 165 and the parts rotataable therewith back to the initial or one position.
  • FIGS. 17 to 22 show a modification of the latch lever 123.
  • the reference character 172 designates, generally, a U-shaped latch lever which has a flat bottom 173 and front and rear arms 174 and 175.
  • the front and rear arms 174 and 175 are not provided with slots, such as the slots 127 and 128 in the front and rear arms 125 and 126 of the latch lever 123.
  • the latch lever 172 can have only rotary movement with respect to the shaft 129 which extends from and is rotatable with the operating member 25.
  • the operation of the switch 15 under the control of the. latch lever 172 is the same as previously described.
  • tongues 176, 177, 178 and 179 are provided for successive mechanical engagement by the cam lobes 116, 117, 118 and 119 respectively. It will be understood that, as these cam lobes successively engage the tongues along the lower edge of the flat bottom 173, the latch lever 172 is rocked from the posit-ion shown in FIG. 17 to the position shown in FIG. 18 and then is returned to the initial position as shown in FIGS. 19 and 20-.
  • a locking lever 180 is employed.
  • the locking lever 180 is rotatably mounted at 181 onan extension 182 from the rear arm 175 of the latch lever 172.
  • a shoulder 183 on the locking lever 180 which extends generally 10 tion here shown.
  • -A torsion spring 184 acts to bias the locking lever 180 to the locking position.
  • One end 185 of the torsion spring 184 overlies and reacts against the upper edge 186 of the flat bottom 173 of the latch lever 172 while the other end 187 of the torsion spring 184 underlies an outstanding arm 188 on the locking lever 180.
  • the relatively strong coil tension spring 139 which is anchored at one end to the shaft or pin 138, is an- .chored at the other end to an inwardly extending arm 189 from the front arm 174 as shown in FIG. 22.
  • Rocking movement of the latch lever 172 in a clockwise direction under the influence of the coil tension spring 139 is limited by .a tongue 190 which extends from the flat bottom 173 and is arranged to engage the stud 103.
  • FIGS. 17,18, 19 and 20 The sequence of operations of the latch lever 172 is shown in FIGS. 17,18, 19 and 20 which correspond to FIGS. 7, 10, 11 and 12.
  • the position of the latch lever 172 in FIG. 17 corresponds to the position of the operating member 25 in the one position shown in FIG. 3 with the movable contact 21 in engagement with the stationary contact 17.
  • the index lever 82 is oscillated in the manner previously described, the unlatch lever 143 is correspondingly rocked to move the outstanding detent 144 into and out of engagement with a curved surface 191 on the locking lever 180.
  • the forwardly extending section 134 of the latch arm 135 is above the curved surface 191, the locking lever 180 is rocked with an idling movement.
  • the latch lever 172 When the cam lobe 116, for example, engages the tongue 176, FIG. 18, the latch lever 172 is rocked to the position here shown where the locking lever 180 is moved to permit the shoulder 183 to engage the left side of the forwardly extending section 134 of the latch arm 135.
  • the relatively strong spring 139 rocks the latch lever 172 to the position shown in FIG. 19. This carries with it the latch arm 135 and effects movement of the operating member 25 from the one position, shown in FIG. 3, to the alternate position where the movable contact 21 engages the stationary contact 18.
  • the unlatch lever 143 has been rotated to move the outstanding detent 144 out of engagement with the curved surface 191 on the locking lever 180.
  • the unlatch lever 143 On a subsequent retraction of the index lever 82, the unlatch lever 143 is rocked by its spring to the position shown in FIG. 20 where the out-standing detent 144 engages the curved surface 191 and on continued downward movement depresses the locking lever to disengage the shoulder 183 from the forwardly extending section 134 of the latch arm 135.
  • the relatively weak spring 137 then returns the latch arm 135 and the operating member 25 rotatable therewith to the one position which is accompanied by movement of the movable contact 21 from engagement with the stationary contact 18 back into engagement with the stationary contact 17.
  • timing means for oscillating said index pawl to rotate said ratchet wheel in step-by-Istep fashion
  • cam means rotatable with said ratchet wheel for engaging said latch lever and moving it into latching engagement with said latch arm and on disengagement from said latch lever permitting said second spring to rotate said latch lever, latch arm and operating member to said alternate position
  • cam means includes a plurality of angularly spaced cams for effecting a corresponding number of switch operations for each rotation of the ratchet wheel.
  • each cam is carried by an individual cam plate
  • the cam plates are individually positionable about the axis of rotation of the ratchet wheel.
  • the ratchet wheel has teeth uniformly spaced along its periphery with one tooth missing thereby providing a tooth space
  • the timing means includes a time dial that rotates once each twenty-four hours
  • a tripper lever is operable by said timingmeans during each revolution of said time dial for advancing said index pawl more than the space occupied by a tooth to move said tooth space out of registery with said index pawl
  • a skipper dial driven by said timing means through one revolution during a whole number of days carries manually movable tripper pins which render inoperative said tripper lever except when one or more of said tripper pins is moved to trip position.
  • a rotatable operating member is connected to said second switch and is movable from one position to an alternate position to eifect corresponding operation of said second switch
  • arm means on said rotatable operating member connected to said second switch is disposed in the path of the cam means rotatable with the ratchet Wheel for operating said second switch.
  • the latch lever has elongated slot means whereby it is both rotatable about the axis of rotation of the operating member and is movable translatorily with respect thereto,
  • said latch lever has a notch for receiving the latch arm in latching engagementtherewith, and (c) engagement of said latch lever by the cam means movesit to position said latch lever in said notch.
  • the 15 latch lever is U-shaped and said elongated slot means includes an elongated slot in each of its arms.
  • the unlatch arm is arranged to rotate said locking.
  • the latch lever is generally U-shaped, and
  • the locking lever is pivoted to one of the arms of the U-shape on the inner side thereof.
  • the cam means includes a plurality of angularly spaced cams on individual cam plates that are positionable about the axis of rotation of the ratchet wheel, and

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US327218A 1963-12-02 1963-12-02 Latch operated timer switch Expired - Lifetime US3248493A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE650796D BE650796A (xx) 1963-12-02
US327218A US3248493A (en) 1963-12-02 1963-12-02 Latch operated timer switch
GB25868/64A GB1026294A (en) 1963-12-02 1964-06-23 Electric time switch
LU46586D LU46586A1 (xx) 1963-12-02 1964-07-21
NL6408564A NL6408564A (xx) 1963-12-02 1964-07-27
DE19641465740 DE1465740C (de) 1963-12-02 1964-10-09 Schaltuhr zur kurzzeitigen Betätigung von Kontakten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US327218A US3248493A (en) 1963-12-02 1963-12-02 Latch operated timer switch

Publications (1)

Publication Number Publication Date
US3248493A true US3248493A (en) 1966-04-26

Family

ID=23275631

Family Applications (1)

Application Number Title Priority Date Filing Date
US327218A Expired - Lifetime US3248493A (en) 1963-12-02 1963-12-02 Latch operated timer switch

Country Status (5)

Country Link
US (1) US3248493A (xx)
BE (1) BE650796A (xx)
GB (1) GB1026294A (xx)
LU (1) LU46586A1 (xx)
NL (1) NL6408564A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358092A (en) * 1966-02-01 1967-12-12 Rhodes Inc M H Presettable timer
US3480041A (en) * 1965-08-23 1969-11-25 Aqua Matic Inc Timer controlled water softener valve
US3482604A (en) * 1966-02-21 1969-12-09 Lambert W Fleckenstein Control valve with rotary actuation
US4012607A (en) * 1973-12-17 1977-03-15 Dieter Graesslin Feinwerktechnik Miniature timer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480041A (en) * 1965-08-23 1969-11-25 Aqua Matic Inc Timer controlled water softener valve
US3358092A (en) * 1966-02-01 1967-12-12 Rhodes Inc M H Presettable timer
US3482604A (en) * 1966-02-21 1969-12-09 Lambert W Fleckenstein Control valve with rotary actuation
US4012607A (en) * 1973-12-17 1977-03-15 Dieter Graesslin Feinwerktechnik Miniature timer

Also Published As

Publication number Publication date
DE1465740A1 (de) 1971-09-23
GB1026294A (en) 1966-04-14
BE650796A (xx)
NL6408564A (xx) 1965-06-03
DE1465740B2 (de) 1972-10-26
LU46586A1 (xx) 1965-01-21

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