US3089994A - Timer apparatus with rapid advance - Google Patents

Timer apparatus with rapid advance Download PDF

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Publication number
US3089994A
US3089994A US84555159A US3089994A US 3089994 A US3089994 A US 3089994A US 84555159 A US84555159 A US 84555159A US 3089994 A US3089994 A US 3089994A
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United States
Prior art keywords
cam
high speed
timer
motor
speed
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Expired - Lifetime
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English (en)
Inventor
Paul H Williams
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Controls Company of America
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Controls Company of America
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL256547D priority Critical patent/NL256547A/xx
Application filed by Controls Company of America filed Critical Controls Company of America
Priority to US84555159 priority patent/US3089994A/en
Priority to DEC22132A priority patent/DE1282134B/de
Priority to DE19601788088 priority patent/DE1788088A1/de
Application granted granted Critical
Publication of US3089994A publication Critical patent/US3089994A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H43/125—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 cam

Definitions

  • An object of the present invention is to reduce the noise level of the timer as much as possible during high speed advance. This has been accomplished by providing means to drop out the slow speed drive cam on which the sub-interval switch cams are mounted during high speed advance which gives rise to a further problem of picking up the slow speed cam at the proper starting point. Means are therefore provided for properly orienting the slow speed drive cam during the high speed operation.
  • FIG. l is a front elevation, partly in section.
  • FIG. 2 is taken on line 2-2 of FIG. 1 showing the drive mechanism.
  • PEG. 3 is taken on line 3 3 of FIG. 1 showing the high speed cam drive.
  • FlG. 4 is taken on line 4-4 of FIG. 2 with the high speed motor disengaged.
  • FIG. 5 is similar to FIG. 4 with the high speed motor engaged.
  • FlG. 6 is a schematic wiring diagram of the present invention.
  • the timer is of the basic interval type wherein slow speed drive motor 10 drives cam 12 (FIG. 2), fixed on shaft 14, in a counterclockwise direction to act on follower 16 to rock link 18 in a clockwise direction about pivot 2t) and against the bias of spring 22.
  • cam 12 FIG. 2
  • the toe 24 of verge 26 will ride up the sloping portion of the next rearward ratchet tooth on ratchet wheel Z8 and shortly before the impulse is given to its lever, the toe will drop into the next notch on the ratchet wheel.
  • Sub-interval switches 52 are actuated by face cams Sil which are integral with drive cam 12.
  • the drive cam is rotated one complete revolution for each step of the timer drum and sequences the sub-interval switches through a complete cycle.
  • the Strathearn cam is rotated at high speed to advance the timer drum rapidly to a starting point, the sub-interval switches are also actuated rapidly, causing noise.
  • the noise level is increased still further by the follower dropping off the high point of the cam after each revolution of the cam and snapping against the low point of the cam.
  • a high speed disc 54 having gear teeth 56 on its outer periphery is mounted to rotate freely on a timer motor shaft 14 and is provided with elliptical cam 619 that acts on linger 62 on follower 16.
  • shaded pole motor 64 is energized, as shown in FIG, 5, rotor 66 will be pulled between shaded poles 68 by solenoid action and rotor clutch half 79 will engage pinion clutch half 72 and rotate pinion gear 74 which en gages teeth 56. This will rotate cam 60 and impulses will be delivered to the ratchet wheel on the arbor at a faster rate (generally in the neighborhood of six per second).
  • the high speed motor will continue to drive cam 6) until the cam bank reaches the selected starting point and the high speed motor is deenergized by seeking system 73 as described in the Strathearn et al. patent. The timer motor will then be energized to drive the cam bank at timing speed.
  • pinion gear 78 engages gear teeth 48 on the periphery of the disc so that on energization of the high speed motor the low speed cam disc will be rotated until the pinion gear engages broken out section 82 which stops rotation of the low speed cam because the pinion gear no longer engages gear teeth 48.
  • This arrangement prevents the continued rotation of the low speed disc during high speed advance and assures that the sub-interval cam disc is at the same starting point for the sub-interval switch sequence each time the timer drum is started.
  • Orienting of the low speed disc by the pinion gear also aligns the low point of cam 12 with the follower so as not to interfere with the follower during operation of the high speed cam. Since the low speed cam will be rotated momentarily by shaded pole motor 64 after the timer motor has been de-energized, an over-running clutch is provided in the gear train which is similar to the arrangement described in Strathearn et al. By aligning the low speed disc at a starting point, a full sub-interval switch sequence will be available at the -irst interval. Without such an arrangement, the first interval may be lost in aligning the lo-w speed cam disc at the ⁇ start of a sub-interval sequence.
  • shaded pole motor 64 will be energized and due to the solenoid action of poles 63, the armature will be moved against the bias of spring 76 causing clutch half 7@ to engage clutch half 72 and drive elliptical cam 60 to cause the rapid rotation of the timer cam drum until the starting point for the selected program is located.
  • pinion gear 7S ⁇ on armature shaft titl will rotate the sub-interval cam ⁇ disc until broken ⁇ out section 32 is opposite the pinion gear. Since the pinion gear no longer engages the gear teeth on the disc it will not rotate and the sub-interval switches will not be actuated.
  • the timer will be advanced rapidly through the rotation of elliptical cam ⁇ disc 60 bythe shaded pole motor to position the timer at the selected starting point.
  • the shaded pole motor will ⁇ be de-energized and the clutch halves disengaged ⁇ due to the bias of the clutch spring.
  • the sub-interval cam disc will always be stopped at the same point due to the broken out section on the disc so that whe the timer motor l@ is energized, it will start the disc at the beginning tot an interval and drive the cam drum at timer speed through the selected cycle.
  • the elliptical cam disc 60 will idle on the timer motor shaft during timing operation and will not rotate with the subinterval cam disc.
  • the elliptical cam is so ⁇ designed so that the high point of the elliptical cam is higher than the high point of cam 12.
  • cam 12 is driving the follower the elliptical cam cannot rotate under the follower and the force of the follower on the advancing stroke will push the elliptical cam out of the way.
  • a timer of the type having a switch operating cam bank, means for advancing the cam bank in a step-by-step manner, slow speed cam means operably engaging the advancing means, timing motor means rotating the slow 1.1!: speed cam means to actuate the advancing means once for each revolution of the slow speed cam means, high speed cam means roperably engaging the advancing means driven by the slow speed cam means, and high speed motor means driving the high speed cam means to actuate the advancing means at a speed faster than timing speed.
  • a timer of the type having a switch operating cam bank, a stepping drive mechanism for indexing the cam bank at intervals, first cam means for actuating the drive mechanism at spaced intervals, a plurality of sub-interval switches operated by the first cam means, timing motor means rotating the first cam means at timing speed, second cam means for actuating the drive mechanism independently yof the first cam means, high speed motor means for driving the second cam means at high speed, clutch means for disengaging the rapid mfotor means from the second cam means when deenergized, said rapid motor means operatively engaging the first cam means to rapidly rotate the first cam means when the second cam means is being driven by the rapid motor means, means to disengage the first ycam means from the rapid motor means when the first cam means has been rotated to the start of a sequence for the sub-interval switches.
  • a timer having a switch operating cam bank, a stepping drive mechanism to 'advance the cam bank at intervals, a rst cam yfor actuating the drive mechanism during timing operation, a second cam for ⁇ actuating the drive mechanism during high speed operation, a timing motor for driving the first cam, and a high speed motor for driving the second cam and operatively engaging the iirst cam to position the first cam at a starting position when the second cam is driven by the high speed motor.
  • a timer according to claim 5 including clutch means to disengage the high speed motor from the second cam during timer operation.
  • a timer of the type having a switch operating cam bank, land la seeking :circuit indicating starting points on the cam bank, slow speed drive means for driving the cam bank a-t timing speed, a sub-interval switch cam bank operated by ⁇ the slow speed drive means and sequenced in each interval, high speed drive means for rotating the switch operating cam bank to a starting point, and means for orienting the sub-interval switch cam bank to a position corresponding to a starting point for a sub-interval switch sequence so that on energization of slow speed drive means a full sub-interval switch sequence is available.
  • a timer of the type having a switch operating cam bank, a stepping ⁇ drive mechanism for indexing the cam bank at intervals, including a cam follower, first cam means engaging the follower to actuate the drive mechanism at spaced intervals, timing motor means rotating the first cam means at timing speed, second cam means engaging the ⁇ follower to actuate the drive mechanism at spaced intervals, and high speed motor means for driving the second cam means at high speed, said high speed motor means being de-energized when the timing motor means is energized, and said second cam means including spaanse means for preventing the second cam means from inter- Iter-ing with the operation of the first cam means.
  • a timer of the type having a switch operating cam bank comprising, means for indexing the cam blank -at intervals including a cam follower, iirst'cam means engaging the follower to actuate the indexing means at s iaced intervals @and having gear teeth on its outer periphery, timing motor means to rotate the rst cam yat timing speed, second cam means engaging the follower to actuate the indexing means at spaced intervals yand having gear teeth on its outer periphery, high speed motor means openative- 1y engaging the gear teeth ⁇ on the -rst and second cams to simultaneously advance the iirst ⁇ cam and the cam bank to starting positions, said Itiming motor being fle-energized when the lhigh speed motor is energized, ⁇ a bnokenput section ⁇ on the periphery of the fir-st cam to disengage the gear teeth from the high ⁇ speed drive means, said high speed motor means being (le-energized when ⁇ the
  • a timer comprising, a timing cam adapted for stepby-step advancement, switches operated by the timing cam to effect a sequence of operations, la timing device adapted for rotation during the intervals between steps of the timing cam and including switch means operated thereby, motor means for advancing the timing cam rapidly through la plurality of steps, and means operable during the rapid advance or the timing cam to position the timing device at a predetermined starting point insuring proper relationship between the timing cam and the timing device.
  • a timer having a lswitch operating cam, function switches operated by the cam, means for periodically advancing the switch ⁇ operating earn to sequentially actuate the switches iat timed intervals, said yadvancing means including a sub-interval timing device driven during each interval of the -switch operating cam, means for iadvancing the switch operating cam at high speed and means operable during said high speed advance to position the subinterval timing device ⁇ at its point of origin.

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US84555159 1959-10-09 1959-10-09 Timer apparatus with rapid advance Expired - Lifetime US3089994A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL256547D NL256547A (de) 1959-10-09
US84555159 US3089994A (en) 1959-10-09 1959-10-09 Timer apparatus with rapid advance
DEC22132A DE1282134B (de) 1959-10-09 1960-08-12 Zeitsteuereinrichtung
DE19601788088 DE1788088A1 (de) 1959-10-09 1960-08-12 Zeitsteuereinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84555159 US3089994A (en) 1959-10-09 1959-10-09 Timer apparatus with rapid advance

Publications (1)

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US3089994A true US3089994A (en) 1963-05-14

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US84555159 Expired - Lifetime US3089994A (en) 1959-10-09 1959-10-09 Timer apparatus with rapid advance

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US (1) US3089994A (de)
DE (2) DE1282134B (de)
NL (1) NL256547A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248575A (en) * 1962-09-19 1966-04-26 Kingston Products Corp Sequential timer
US3296465A (en) * 1963-01-29 1967-01-03 Borg Warner Control arrangement for a household appliance
US3401271A (en) * 1963-07-05 1968-09-10 Trw Inc System for automatic change of function or capacity
US3465110A (en) * 1965-02-15 1969-09-02 Controls Co Of America Multiple time base timer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391718A (en) * 1942-12-12 1945-12-25 Gen Electric Washing machine
US2755424A (en) * 1954-07-28 1956-07-17 Papitto Gene Automatic and time controlled channel selectors for television or radio receivers
US2929259A (en) * 1956-03-19 1960-03-22 Admiral Corp Control circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH323299A (de) * 1954-07-19 1957-07-31 Saia Ag Elektrischer Programmschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391718A (en) * 1942-12-12 1945-12-25 Gen Electric Washing machine
US2755424A (en) * 1954-07-28 1956-07-17 Papitto Gene Automatic and time controlled channel selectors for television or radio receivers
US2929259A (en) * 1956-03-19 1960-03-22 Admiral Corp Control circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248575A (en) * 1962-09-19 1966-04-26 Kingston Products Corp Sequential timer
US3296465A (en) * 1963-01-29 1967-01-03 Borg Warner Control arrangement for a household appliance
US3401271A (en) * 1963-07-05 1968-09-10 Trw Inc System for automatic change of function or capacity
US3465110A (en) * 1965-02-15 1969-09-02 Controls Co Of America Multiple time base timer

Also Published As

Publication number Publication date
DE1282134B (de) 1968-11-07
NL256547A (de) 1900-01-01
DE1788088A1 (de) 1972-01-13

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