US3449699A - Programmer for controlling switches of washing machines and the like - Google Patents

Programmer for controlling switches of washing machines and the like Download PDF

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Publication number
US3449699A
US3449699A US604416A US3449699DA US3449699A US 3449699 A US3449699 A US 3449699A US 604416 A US604416 A US 604416A US 3449699D A US3449699D A US 3449699DA US 3449699 A US3449699 A US 3449699A
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Prior art keywords
cam
cam block
contact
programmer
shaft
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Expired - Lifetime
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US604416A
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English (en)
Inventor
Jean Jullien Davin
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Thales Avionics SAS
Crouzet SpA
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Crouzet SA
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    • 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
    • H01H43/12—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 a single cycle of operation
    • H01H43/121—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 a single cycle of operation using a drum
    • 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

Definitions

  • a programmer which includes a rotary cam means which is continuously rotated for actuating at least one switch, this rotary cam means being supported for rotary movement by a fixed shaft which also supports for rotary movement a rotary cam block having a hollow interior adapted to receive additional components of the assembly.
  • a releasable coupling means is provided for releasably coupling the rotary cam means and the cam block to each other, and this releasable coupling means is capable of being periodically energized so as to provide a step-bystep advance of the cam block, a positioning means being provided for determining the angular positions of the cam block during the intervals between the turning thereof periodically when the coupling means is energized.
  • the cam block itself controls additional switches of the assembly.
  • a complete revolution comprises as many steps of shortest operation as are contained in the total duration of the cycle. This has the advantage of providing the smallest possible number of steps for the complete cycle, a feature which permits wide tolerances in the formation and angular positioning of the cams and hence reliable operation, easy construction and moderate cost.
  • the object of the present invention is a new combination of means to obtain a new programmer, with cams specially adapted to the automatic control of washing machines and the like, whereby by means of a simple change in the assembly of some of the combinations of means, the programmer may be constructed in several forms to satisfy the requirements of different washing machine manufacturers, these dilferent forms comprising the maxi mum number of common members.
  • a programmer comprises means which form a base, said means being constituted by two plates connected together by means of columns hooked or riveted at their ends, one of the ends of the columns being provided with a bore to permit assembly by a self threading screw, or a rivet secured by friction locking if, for repairing, it is necessary to destroy the hook connection by drilling. Since such repair may be expected on less than one percent of the apparatus, the elimination of the connecting screws constitutes a saving in the new apparatus.
  • means to provide some operations in a continuous cycle in particular, the reversing control of the direction of rotation of the drum of the washing machine, said means consisting of a stepping or advancing cam which actuates at least one contact and which is driven by a rapid continuous movement of a synchronous reduction motor.
  • Means are provided to insure the control of various functions of the washing machine according to a predetermined program, said means consisting of a cam block rotating with a step-by-step movement and controlled by contacts.
  • This cam block is cast in one piece for the purpose of reducing the cost and increasing precision.
  • This cam block since it is formed as a single piece, has a large central hollow interior which may be used for accommodating other members.
  • the stopping of the step-by-step movement is made directly by means of an interruption of the step-by-step impulses and not by means of an interruption in the feed of the synchronous reduction motor which remains continuously energized, thus rendering unnecessary the use of a special contact which was indispensible in many of the known programmers.
  • the stopping of the step-by-step drive is effected without the necessity of using any special device.
  • An important feature of the coupling means resides in the fact that they are entirely located in the hollow space of the cam block, which permits a simple construction which is very reliable in operation and is very compact, said means consisting in an electromagnet coil mounted on a fixed shaft of nonmagnetic metal drilled for the passage of the coil leads, and controlling a tubular core which encloses the drilled shaft and is longitudinally displaceable thereon, returned by an opposing spring and fitted, by being inserted by casting, in a grooved male mandrel rotated by projections of the reversing cam and the grooves of which, when the coil is energized, cooperate with the grooves of a female portion formed by casting in the interior of the cam block.
  • a further feature of the programmer is that for giving step-by-step impulses, one or two diametrically opposed contacts may be actuated by the stepping cam.
  • One stepby-step frequency or the double frequency is manually selected.
  • the programmer comprises means for temporarily obtaining different values of duration of the interval between successive steps, these means consisting either in at least one additional cam actuating at least one contact and driven by a continuous rotational motion from the synchronous reduction motor in a ratio different from that of the stepping cam, and in at least one interchangeable memory cam or similar part of the cam block, actuating at least one contact to insure appropriate coupling between the contact or contacts actuated by the additional cam and the contact or contacts actuated by the reversing cam to control the coupling members.
  • the programmer has the feature of employing alternative means to produce the various operations, said means comprising one or more cams, connected to rotate with the cam block, and capable of being axially displaced, to pull or push the manually controlled push button, the actuators of the contacts being controlled by these cams which have such shapes that the operation obtained when the button is pushed is different from that obtained when the button is pulled.
  • FIG. 1 shows a programmer according to the present invention the base or frame of which is shown in section with the cams centered on a line passing through the axis of the device, the members of the electromagnetic coupling being shown in half-section to illustrate certain details;
  • FIGS. 2, 3 and 4 show three variants of the angular arrangement of the displaceable toothed crown wheel for connection to the cam block, shown in section on the line AA of FIG. 1;
  • FIG. 5 shows a form of centering and angular fixing of the fixed toothed crown wheel to be attached to a plate
  • FIG. 6 shows details of the teeth of the toothed crown wheels
  • FIG. 7 shows a programmer with an additional cam
  • FIG. 8 shows a programmer with some cams axially displaceable
  • FIG. 9 is a detail of FIG. 8 taken at section line CC of FIG. 8;
  • FIGS. 10, 11, 12, 13 and 14 show details of the mounting columns
  • FIG. 15 is a simplified circuit diagram showing how the step-by-step advance, normally controlled by the stepping cam, may be temporarily replaced by a continuous advance or interrupted or initiated by a thermostat or pressurestat or by a manually operated push button which actuates a contact;
  • FIG. 16 is a circuit diagram including a reversing cam and an additional cam for a different speed.
  • FIG. 17 is a diagram which represents different step impulse frequencies derivable from the circuit of FIG. 16, assuming that the stepping cam makes a revolution in two minutes and the additional cam a revolution in six minutes.
  • FIG. 1 is a section of a programmer according to the present invention.
  • the rear plate 1 and the small front plate 2 connected by two columns or spacers 3 constitute the base or frame of the apparatus.
  • the rear plate 1 supports one end of the tubular drilled shaft 4 of nonmagnetic material, kept in a fixed, nonrotating position by its rear shoulder 4a.
  • Loosely mounted on the shaft 4 is a rotary cam means in the form of a stepping or advancing cam 5 comprising at least one cam track 5a, the profile of which controls at least one contact, not shown, and teeth 5b which make it possible to drive the cam with a continuous rotary movement by means of the gear 6 connected to the output shaft 7 of a synchronous reduction motor (not shown).
  • a cam block 8 obtained by stamping from a single piece.
  • the construction of the cam block in a single piece of plastic permits a high degree of precision in the relative angular locking of the cams, economy in members and time of assembly and saving in material.
  • the cam block has a large hollow space in its interior, utilized to receive an electromagnetic coupling means between the cam 5 and the cam block 8.
  • the cam block 8 comprises several tracks or camming flanges 8b, each track actuating at least one, but preferably two or more contacts 9 which may be of known type, single make or multiple.
  • the cam block 8 comprises a journal which rotates in a bore of the plate 2 and in which a shaft 10, of hexagonal section, is secured by insertion and casting.
  • the shaft 10 is intended to receive a push button (not shown) for manual control, if such control is provided, or a simple indicator frame (not shown) if remote manual control is provided by means of an auxiliary manually controlled contact.
  • the electromagnetic coupling means comprise a fixed electromagnet formed by a magnetic core 11, mounted by locking on the shaft 4, on which is riveted a cylindrical casing of soft iron 12 containing a coil 13, the
  • the output wires of the casing contained in an insulating sheath 14, issue from an opening 12a and enter the drilled shaft 4 through a lateral opening 4b. They are conducted to the exterior of the apparatus, the casing 12 being closed by a cover of soft iron completing the magnetic circuit.
  • the said cover has a number of radial tabs 15a mounted within notches formed in the edge of the casing 12 the ends of which ensure the centering of the cam block.
  • the coupling means further comprises displaceable fittings formed of a tubular armature or core 16 connected, by insertion and casting, to a toothed transmission member 17.
  • the fittings slide longitudinally on the hollow shaft 4, being urged in one direction by a return spring 18 and capable of being moved in the other direction when the coil 13 of the electromagnet is energized.
  • the said displaceable fittings are also continuously rotated by projections 50 of the cam 5 cooperating with apertures 17a.
  • the teeth of the member 17 engage, when the coil 13 is energized, with the corresponding grooves 8g obtained by stamping within the cam block, thus forming a splined transmission.
  • FIG. 1 shows thepositioning means for retaining the cam block in predetermined angular positions, said means consisting in a displaceable crown wheel 19 with ratchet teeth connected to rotate with the cam block 8 by means of projection 8d cooperating with apertures 19a of the toothed wheel 19, the latter being also resiliently biased by the spring to engage with the opposed teeth of a crown wheel 21 fixed by feet 21a which engage in holes in the plate 2.
  • FIG. 2 shows how the projections 8d may be arranged if the number of teeth of the crown wheels 19 and 21 is a whole multiple of the number-of projections 8d; if not,
  • auxiliary projection 8d which fits into a bore 19b (FIG. 3).
  • one of the projections 8d is made of greater width than the other (FIG. 4), or again an asymmetrical distribution of the said projections may be used.
  • one of the feet 21a (FIG. 5) of the crown wheel 21 is different from the other feet 21a.
  • FIG. 6 shows in detail the magnified shape of the teeth of the crown wheels 19 and 21.
  • One of the sides of each tooth has a small incline distributed over approximately of the step controlling the rotation in one direction with compression of the spring 20.
  • the other side of each tooth has a sharp incline distributed over a quarter of the step p which prevents rotation in the other direction, drive by means of the coupled connection being effected over approximately Vs of each step.
  • the tips of the teeth of the displaceable crown wheel 19 ride over the tips of the teeth of the wheel 21.
  • Case 12 and the tubular shaft 4, connected together, are retained axially by the plate 1, due to the fixed shoulder 4a.
  • Transmission member 17 is held by the spring 18 against the cam 5.
  • the toothed wheel 21 is held against the plate 2 by the thrust of the wheel 19 under the action of the spring 20.
  • At least one insulating support 22, carrying the contacts 9, is supported in position between the plates 1 and 2, with end tabs 22a, 22b, obtained by casting, of difierent shape to avoid any inaccuracy in assembly.
  • FIG. 7 shows an embodiment of the programmer comprising at least one additional cam 23.
  • the stepping cam 5 comprises a cylindrical hub 5d on which the additional cam 23 loosely rotates, comprising at least one track or camming flange 23a, provided with teeth 23b which mesh with a pinion 24 coaxially fixed to the gear 6 of the shaft 7 of the synchronous reduction motor (not shown).
  • a pinion 24 coaxially fixed to the gear 6 of the shaft 7 of the synchronous reduction motor (not shown).
  • FIG. 8 shows an embodiment of a programmer comprising one or more axially displaceable cams for actuating contacts the feelers of which an: shaped to permit ditferent operations according to whether a manual control knob is pulled or pushed.
  • the members which effect operations identical to those described above bear the same reference characters, and the members having the same shape as that of FIG. 1 have no reference characters.
  • the cam block 8 freely turns on the hollow fixed shaft 4 by a bore 8a.
  • the projections 8d comprise a shoulder 8p on which the spring 20 rests.
  • a cam 25 freely mounted by a bore 25a on the shaft 4 comprises at least one camming flange or track such as 25b and a journal 250, rotating in a bore of the plate 2 and in which there is secured, by insertion and casting, a shaft 10 which may have a hexagonal section and is adapted to receive a manually controlled push button (not shown). Since said shaft 10 works with end pressure, it has a groove 10a receiving a projection of journal 25c to prevent axial movement of element 10 in element 25.
  • the journal 250 has a shoulder 25d which engages the plate 2 when the cam is in one axially displaced position, and a channel 25:: receives a small coiled spring 26 (FIG. 9) cooperating with two circular grooves 4c, obtained by turning or pressing in the hollow shaft 4, to keep the cam 25 either in position pressed against the cam block 8, or in a withdrawn position.
  • the rotary drive and the angular movement of the cam 25 are insured by the projections 8d which pass through the cam 25 in the apertures 25f.
  • Each track 25b of the cam 25 actuates at least one, but preferably two or more, contacts 27 which may be one way or multiple, the displaceable members of which are provided with feelers 28 of suitable shape to cooperate with the cam 25 in such manner that the operation of said contacts varies according to whether the cam 25 is in one position or another.
  • FIG. 10 shows how the column 3, provided with a bore 3a and spun over in the plate 1, as shown by the full line, may be made dismountable for repair by boring out the cone face 3b, shown in broken lines.
  • FIG. 11 shows how, after repair, the column 3 may be remounted on the plate 1 by means of the self-threading screw 29 of known type, which is an advantage since experience shows that serious repairs are necessary in less than 1% of manufactured programmers.
  • FIG. 12 shows another method of remounting the column 3 on the plate 1, after repairs, consisting in forcing a rivet 30 into the bore 3a and friction-locking it.
  • FIG. 13 shows a solution which may perhaps be even more economical.
  • the column 3 on the new apparatus has a simple enlargement 3c intended to permit spinning over on the plate 1 according to the full line.
  • the bore 3a and the cone 3b are made in one operation by a drill 31 which serves as a pivot for a conical cutter 32 mounted on the drill 31 by a lock screw 33, as shown in FIG. 14.
  • FIG. 15 schematically shows how, when the cam 5 is permanently rotating, the electromagnetic coupling device actuated by the coil 13, makes it possible to drive the cam block 8 in different ways.
  • the cam block 8 When, independently of the contacts C and C the manual contact C is closed, the cam block 8 is driven with a continuous movement.
  • an interchangeable memory cam or such, forming part of the cam block 8 closes the contact C the cam block 8 is driven with a continuous movement during the whole time for which the closure of the said contact lasts.
  • a contact (not shown) controls the filling valve and the contact C is open, thus interrupting the impulses of C while the contact C is closed, energizing the pressurestat P.
  • a contact C is closed so that when, at the end of the filling, the pressurestat has established a connection by means of C the coil will receive current which, at the end of a step, will be interrupted with the opening of C while the cam block has reached the heating position.
  • the contact T or T closes, the coil 13 receives a current which is interrupted when the cam block, having advanced by one step, has caused the contacts C and C to open simultaneously.
  • Contact C closing again reestablishes the circuit of the step-bystep impulses controlled by C
  • the cam block reaches the position empty during the cycle, the contact C is again opened and the contact C closed while the contact C is closed.
  • the pressurestat closes the contact C the coil 13 receives current which is interrupted when the cam block 8, having taken one step, has opened contact C If this is the last emptying after the last heating, the contact C is merely interrupted, reestablishing the impulse circuit by means of C Otherwise, C remains closed and C closes for emptying again.
  • An important feature of the present programmer resides in the fact that the use of the electromagnetic coupling device renders unnecessary, both a special device for step-by-step driving and any device making it possible to interrupt temporarily the step-by-step feed.
  • FIG. 16 shows how it is possible to use the additional cam 23 shown in FIG. 7 to obtain diflerent intervals by interconnecting contacts. If connection AB is made and the contact D is closed simultaneously, there is an impulse with ever-y half-revolution of the cam 5.
  • the basic time t of the impulse is in each case defined by the cam 5.
  • FIG. 17 is a diagram showing the timing, based on the assumption that the cam 5 makes one revolution in two minutes and the cam 23 one revolution in 6 minutes, i.e
  • connections AB, AC, D and E may be selected by hand by way of a keyboard with keys or controlled by the cams of the programmers.
  • said cam block being a unitary hollow body of electrically nonconductive material.
  • said coupling means include a releasable splined connection between said cam block and said rotary cam means, said connection including a group of grooves and a group of teeth received in said grooves when said cam block is coupled to said rotary cam means, one of said groups being operatively connected to said rotary cam means for rotary movement therewith, the other group being integral with said cam block, one of said groups being axially shiftable into and out of engagement with the other group.
  • said positioning means includes projections of said cam block which are integral therewith and which extend parallel to said shaft.
  • said hollow cam block encloses an electromagnet, said shaft, as well as said rotary cam means and said cam block being made of a nonmagnetic material, and said electromagnet when energized displacing said group which is operatively connected with said rotary cam means into engagement with said group which is integral with said cam block for establishing a transmission from said rotary cam means to said cam block, said electromagnet being fixed to said shaft and said shaft being hollow and receiving conductors of said electromagnet, the operative connection between said shiftable group of the splined connection and said rotary cam means being in the form of projections of the latter extending parallel to said shaft and apertures in said shiftable group receiving said projections, and a spring surrounding said shaft and urging said shiftable group away from said group which is integral with said cam block to eliminate the connection between said rotary cam means and said cam block.
  • the combination of claim 8' further comprising positioning means for determining the angular position of said cam block during intervals between the turning thereof by said rotary cam means, said positioning means including a pair of ratchet wheels one of which is stationary and the other of which is operatively connected with said cam block for rotary movement therewith and a spring urging said other wheel into engagement with said stationary wheel.
  • a further cam is operatively connected with said cam block for rotary movement therewith as well as for axial shifting movement relative thereto, manually operable means coacting with the latter cam for shifting the latter between a pair of axial positions with respect to said cam block, a pair of switches one of which is controlled by said axially shiftable cam in one position thereof and the other of which is controlled by the latter cam in the other position thereof, and resilient detent means coacting with said axially shiftablelcam for maintaining the latter in one or the other of said positions thereof, said detent means including a pair of circular grooves formed in said fixed shaft and a springy member carried by said axially shift able cam and received in one or the other of said grooves.

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US604416A 1965-12-24 1966-12-23 Programmer for controlling switches of washing machines and the like Expired - Lifetime US3449699A (en)

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IT2860465 1965-12-24

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US3449699A true US3449699A (en) 1969-06-10

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US604416A Expired - Lifetime US3449699A (en) 1965-12-24 1966-12-23 Programmer for controlling switches of washing machines and the like

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US (1) US3449699A (ja)
BE (1) BE691024A (ja)
CH (1) CH465696A (ja)
FR (1) FR1510196A (ja)
GB (1) GB1144514A (ja)
NL (1) NL154041B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627937A (en) * 1970-04-09 1971-12-14 Dynamics Corp America Cum selector switch mecahnism with lost motion structure for use in electro-mechanical timers
US3649783A (en) * 1970-02-24 1972-03-14 Mallory & Co Inc P R Cam-operated timer with improved electrical reset means
US3725616A (en) * 1971-07-22 1973-04-03 Gulf & Western Industries Relay clutch timer with adjustable cam member
US3727015A (en) * 1971-04-12 1973-04-10 Mallory & Co Inc P R Cam operated program timer assembly with replaceable leaf spring contact structure
US3732383A (en) * 1970-09-28 1973-05-08 Mallory & Co Inc P R Multiple integral timers with improved housing support plate
US3735062A (en) * 1969-04-04 1973-05-22 Mallory & Co Inc P R Extended cycle timer with momentary switch
US3760129A (en) * 1971-06-01 1973-09-18 Crauzet Programmer for household electric machines with improved cam operating mechanism
US3760136A (en) * 1971-01-28 1973-09-18 Dual Gebrueder Steidinger Switching device for a tone band drive
US3810050A (en) * 1971-07-22 1974-05-07 Gulf & Western Industries Relay clutch timer
US5170022A (en) * 1990-06-01 1992-12-08 Esswein S.A. Electromechanical programmer with smooth program preselection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720189A (en) * 1925-05-25 1929-07-09 Jackson Albert Henry Electric-motor-control system
GB973814A (en) * 1961-12-14 1964-10-28 B & R Relays Ltd Electrical control device
US3367193A (en) * 1965-10-23 1968-02-06 Cons Airborne Systems Inc Timing switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720189A (en) * 1925-05-25 1929-07-09 Jackson Albert Henry Electric-motor-control system
GB973814A (en) * 1961-12-14 1964-10-28 B & R Relays Ltd Electrical control device
US3367193A (en) * 1965-10-23 1968-02-06 Cons Airborne Systems Inc Timing switch

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735062A (en) * 1969-04-04 1973-05-22 Mallory & Co Inc P R Extended cycle timer with momentary switch
US3649783A (en) * 1970-02-24 1972-03-14 Mallory & Co Inc P R Cam-operated timer with improved electrical reset means
US3627937A (en) * 1970-04-09 1971-12-14 Dynamics Corp America Cum selector switch mecahnism with lost motion structure for use in electro-mechanical timers
US3732383A (en) * 1970-09-28 1973-05-08 Mallory & Co Inc P R Multiple integral timers with improved housing support plate
US3760136A (en) * 1971-01-28 1973-09-18 Dual Gebrueder Steidinger Switching device for a tone band drive
US3727015A (en) * 1971-04-12 1973-04-10 Mallory & Co Inc P R Cam operated program timer assembly with replaceable leaf spring contact structure
US3760129A (en) * 1971-06-01 1973-09-18 Crauzet Programmer for household electric machines with improved cam operating mechanism
US3725616A (en) * 1971-07-22 1973-04-03 Gulf & Western Industries Relay clutch timer with adjustable cam member
US3810050A (en) * 1971-07-22 1974-05-07 Gulf & Western Industries Relay clutch timer
US5170022A (en) * 1990-06-01 1992-12-08 Esswein S.A. Electromechanical programmer with smooth program preselection

Also Published As

Publication number Publication date
CH465696A (it) 1968-11-30
FR1510196A (fr) 1968-01-19
NL6617453A (ja) 1967-06-26
NL154041B (nl) 1977-07-15
BE691024A (ja) 1967-05-16
GB1144514A (en) 1969-03-05

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