US3187128A - Speed control switching mechanism - Google Patents

Speed control switching mechanism Download PDF

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Publication number
US3187128A
US3187128A US215924A US21592462A US3187128A US 3187128 A US3187128 A US 3187128A US 215924 A US215924 A US 215924A US 21592462 A US21592462 A US 21592462A US 3187128 A US3187128 A US 3187128A
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United States
Prior art keywords
contact
speed
force
elevator
weight
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US215924A
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English (en)
Inventor
Hammer Josef
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Individual
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Individual
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/044—Mechanical overspeed governors
    • B66B5/046—Mechanical overspeed governors of the pendulum or rocker arm type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/32—Detent devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/05—Brakes with mechanisms with latches for hoists or similar devices

Definitions

  • the present invention concerns an elevator safety device, more especially an arrangement for supervising the travelling speed of elevators.
  • Passenger elevators and goods elevators which may be entered have to be fitted with a safety catch which is released by a speed regulator when the normal travelling ⁇ speed has been exceeded by a certain value, at least during descent. If the safety catch is released then, at least in the case of a wedge safety catch, the cage is stopped with a considerable negative acceleration, which is unpleasant for the passengers.
  • centrifugal switches are provided with a mechanical or electric locking system which keeps the elevator control system interrupted after the switches have responded until the locking has been released again by hand after inspecting the elevator.
  • centrifugal switches have several movable parts which are subjected to permanent wear. Owing to this wear the operating speed at which the switch responds can alter with time so that a periodical testing of the responding speed is necessary.
  • the object of the present invention is to provide an arrangement for supervising the travelling speed of elevators, which is distinguished by its particular simplicity and the parts of which execute no movement relative to one another in the region of normal speed.
  • the arrangement in accordance with the invention for supervising the travelling speed of elevators having a cam regulator having at least one rocking lever, for releasing a safety catch is characterised by the feature that connected with one rocking lever there is a weight or mass body displaceably guided substantially tangential to the rocking lever movement and pressed against a fixed stop under action of an adjustable pressure application force, which body is adapted to co-operate in such a manner with a contact bridge of a contact in the circuit of the elevator that, when the mass body is lifted off the fixed stop, contact is interrupted, the mass of the body and the pressure application force being so selected that with a certain critical travelling speed the accelerating forces acting on the mass body lift the body off the fixed stop against the pressure application force, so that the control circuit is interrupted.
  • FIG. 1 is an end elevation of a first embodiment in which the pressure application force is produced by a 3,187,128 Patented June l, 1965 ICC compression spring and in which the contact is fixedly disposed; q
  • FIG. 2 is a corresponding side elevation
  • FiG. 3 is an end elevation of a second embodiment in which the contact is also arranged on the rocking lever;
  • PIG. 4 is a side elevation corresponding to FIG. 3;
  • FlG. 5 is an end elevation of a third embodiment in which for obtaining a snap action the pressure application force is produced by means of a permanent magnet and in which the contact is also arranged on the rocking lever, the parts being shown in their normal position;
  • FiG. 6 is a side elevation corresponding to FIG. 5 but with the parts shown in their released position;
  • FG. 7 is a diagram of the forces acting when the lift construction of FlGS. 5 and 6 is stopped.
  • FIG. 8 is a diagram of the acceleration forces acting on the mass body.
  • FIGS. 1 and 2 the numeral 1 designates a cam regulator only partly shown, the structure and method of operation of which are assumed to be known.
  • the regulator comprises a stand 1.1, a cam disc 1.2, and rocking lever 1.3 which has a boss 1.4 for mounting the axle 1.5 of a roller 1.6.
  • a carrying stirrup 2 to which a U-profile 3 is fixed is rigidly screwed to the boss 1.4.
  • the upper flange 3.1 of the U-profile 3 has a tapped hole 3.3 formed therein.
  • a guide member 4 is threadedly engaged in the tapped hole 3.3 and locked in position by means of a nut 5.
  • the guide member 4 acts as a guide for an actuating bolt 6 and as a support for a compression spring 7.
  • a weight or mass body 8 is fixed on the actuating bolt 6. Adjusting the guide member 4 causes the pressure of the compression spring 7 against the weight body 8 to be adjusted. A contact is fixed to the stand 1.1 .of the cam regulator 1 by means of a stirrup 10. The weight body 3 screwed to the actuating bolt 6 is urged by action of its weight and the spring force of the compression spring 7 against the lower shank 3.2 of the U-profile. The rocking lever 1.3 is subjected to the action of a tension spring 1.7 which at the other end is fixed to the stand 1.1.
  • This spring 1.7 tends to pull the roller 1.6 of the rocking lever 1.3 on to the cam disc 1.2, so that the rocking lever 1.3 is caused to execute an oscillating movement about its bearing 1.9 on rotation of the cam disc 1.2 driven by a regulating cable 1.3.
  • FIGS. 1 and 2 operate as follows: When the elevator is in motion, the cam disc 1.2 is driven and rotates at an angular speed proportional to the travelling speed of the lift. The rocking lever 1.3 thus executes the aforesaid rocking movement. The parts fixed to the carrying stirrup 2 are alternately accelerated upwards and decelerated again downwards in a substantially vertical direction. Consequently an acceleration force acts on the body 8 with a continuously varying magnitude and direction. The graph of the maximum of this acceleration force is thus a function of the travelling speed of the elevator cage.
  • the dimensions of the cornpression spring 7 and of the body 8 have thus been so selected that, when a certain travelling speed has been exceeded, the acceleration force acting on the body 8 is greater than the sum of the weight of the body and of the spring force. At this travelling speed the weight body 8 is lifted away from the shank 3.2, so that the actuating bolt 6 lifts the contact bridge 9.1 of the contact 9 off the fixed contacts 9.2. Hence the control circuit of the lift is interrupted.
  • the contact 9 can in known manner be so constructed that after it has been actuated by the actuating lever 6 it remains open having to be returned again by hand.
  • FIGS. 3 and 4 A further form of construction is evident from FIGS. 3 and 4, the same parts being provided with the same reference numeral.
  • a carrying stirrup 11 is screwed firmly to the boss 1.4.
  • the carrying stirrup 11 has a stop 15 and a contact 16 fixed thereon.
  • a weight or mass body 17 is fixed on the actuating bolt 13.
  • the contact comprises a housing 16.1, ltwo fixed contacts 16.2 and a contact bridge 16.3.v
  • a spring 16.4 is provided for producing the contact pressure.
  • the actuating bolt 1S is guided in the housing 16.1.
  • the upper end of a tension spring 19 is xed on the threaded pin 12 and the lower end to the body 17.
  • the tension spring 19 draws the body 17 against the stop 15, which has a passage hole 15.1 for the tension spring 19 formed therein.
  • the method of operation of this design is the same in principle as in the above example.
  • the Contact 15 however follows .the movement of the rocking lever which necessitates correspondingly displaceable supply leads to the iixed contacts 16.2.
  • the weight of the body 17 herein acts against the spring force of thc tension spring 19, so that the body 17 is then lifted oil the iixed stop 15 or the contact bridge 16.3 off the xed contacts 16.2, when the sum of lthe acceleration force acting on the body 17 becomes greater than the spring force of the tension spring 19.
  • the dimensions of the tension spring 19 and of the body 17 in turn are again selected in such a manner that the interruption takes place when a certain travelling speed of the lift is exceeded.
  • the adjustment of the responding speed is effected by adjusting the nuts 13, 14 on the threaded pin 12.
  • the contact 16 herein may also be so constructed that it remains open after the contact bridge has been lifted oil and having to be closed again by hand.
  • the actuating bol-t 1S or the body 17 can be provided in known manner with a latching arrangement, so that these after initial actuation of the contact 16 remain in the actuating position and have to be returned again by hand.
  • FIGS. 5 and 6 A third embodiment of the arrangement is evident from FIGS. 5 and 6, in combination with the diagrams in FIGS.
  • a carrying stirrup 2t is rigidly screwed on to the boss 1.4. Its upper end is bent over at right angles and has a tapped hole 20.1 formed therein.
  • An adjusting screw 21 is threadedly engaged in the tapped hole 20.1 by means of a nut 22.
  • An armature core 23 and a contact 24 are iixed on the carrying stirrup 2t).
  • the numeral 25 designates a permanent magnet, which is iixed on a square actuating bolt 26.
  • the contact 24 comprises a housing 24.1, two iixed contacts 24.2 and a contact bridge 24.3. To produce the contact pressure a spring 24.4 is provided.
  • the actuating bolt 26 is guided in the housing 24.1.
  • the actuating bolt 26 with its upper end acts as a guide for a compression spring 2'7 acting on the permanent magnet 25.
  • the compression spring 27 is supported at the top against the adjusting screw 21, which is provided with an extension Ifor guiding the compression spring 27.
  • the graph 30 .thus shows the Weight, the graph 31 the attracting force of the permanent magnet 25 and the graph 32 the force exerted by the compression spring 27 on the permanent magnet 25 in function of the air gap. The sum of these forces is illustrated by the graph 33.
  • the air gap in the released position is designated by h.
  • apparatus for operating the control contact of the electrical circuit of the elevator system comprising, a guide member disposed on said cam follower lever and movable therewith in a position substantially parallel to said vertical line, a weight slidably mounted in said guide member for reciprocal vertical movement relatively therewith, upper and Vlower stop means for limiting movementof said weight, means coacting with said weight in its upward movement for operating said control contact and adjustable spring means for normally urging said weight toward said lower stop, said weight being caused to act on said means for operating said control contact when the upward inertia caused by the rotation of said cam exceeds a predetermined speed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Tunnel Furnaces (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
US215924A 1961-08-12 1962-08-09 Speed control switching mechanism Expired - Lifetime US3187128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH949861A CH387902A (de) 1961-08-12 1961-08-12 Einrichtung zur Überwachung der Fahrgeschwindigkeit von Aufzügen

Publications (1)

Publication Number Publication Date
US3187128A true US3187128A (en) 1965-06-01

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Application Number Title Priority Date Filing Date
US215924A Expired - Lifetime US3187128A (en) 1961-08-12 1962-08-09 Speed control switching mechanism

Country Status (7)

Country Link
US (1) US3187128A (de)
CH (1) CH387902A (de)
DE (1) DE1406196A1 (de)
ES (1) ES279995A3 (de)
GB (1) GB962708A (de)
LU (1) LU42203A1 (de)
NO (1) NO123304B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982085A (en) * 1974-09-16 1976-09-21 Cincinnati Milacron, Inc. Stock sensing device
EP1742345A1 (de) * 2005-07-08 2007-01-10 Dynatech, Dynamics & Technology, S. L. System zur Begrenzung der Geschwindigkeit bei Hebevorrichtungen
US20120061189A1 (en) * 2009-06-04 2012-03-15 Marcel Imfeld Speed limiter in an elevator system
US20130105250A1 (en) * 2011-10-27 2013-05-02 Inventio Ag Speed limiter for an elevator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3391907A (en) * 1966-09-26 1968-07-09 Roger G. Vogelsang Marine winches
DE3137523C2 (de) * 1981-09-22 1987-04-02 Mannesmann AG, 4000 Düsseldorf Sicherheitseinrichtung für ein Hebezeug
CH669181A5 (de) * 1985-08-29 1989-02-28 Inventio Ag Vorabschalteinrichtung an einem nockenrad-geschwindigkeitsbegrenzer fuer aufzuege.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455335A (en) * 1945-04-02 1948-11-30 Janette Mfg Company Centrifugally operated electric governor
US2643871A (en) * 1951-11-30 1953-06-30 Frederick P Warrick Magnetically biased centrifugal speed sensing means
US2895023A (en) * 1958-06-20 1959-07-14 Sorvall Inc Ivan Centrifuge deviation sensing switching mechanism
US3028461A (en) * 1957-01-11 1962-04-03 Vickers Electrical Co Ltd Overspeed protection devices

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455335A (en) * 1945-04-02 1948-11-30 Janette Mfg Company Centrifugally operated electric governor
US2643871A (en) * 1951-11-30 1953-06-30 Frederick P Warrick Magnetically biased centrifugal speed sensing means
US3028461A (en) * 1957-01-11 1962-04-03 Vickers Electrical Co Ltd Overspeed protection devices
US2895023A (en) * 1958-06-20 1959-07-14 Sorvall Inc Ivan Centrifuge deviation sensing switching mechanism

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982085A (en) * 1974-09-16 1976-09-21 Cincinnati Milacron, Inc. Stock sensing device
EP1742345A1 (de) * 2005-07-08 2007-01-10 Dynatech, Dynamics & Technology, S. L. System zur Begrenzung der Geschwindigkeit bei Hebevorrichtungen
KR20070006538A (ko) * 2005-07-08 2007-01-11 다이나텍, 다이나믹스 앤드 테크놀러지, 에스. 엘. 리프트장치를 위한 속도제한장치
US20120061189A1 (en) * 2009-06-04 2012-03-15 Marcel Imfeld Speed limiter in an elevator system
US8875846B2 (en) * 2009-06-04 2014-11-04 Inventio Ag Speed limiter in an elevator system
US20130105250A1 (en) * 2011-10-27 2013-05-02 Inventio Ag Speed limiter for an elevator

Also Published As

Publication number Publication date
NO123304B (de) 1971-10-25
GB962708A (en) 1964-07-01
LU42203A1 (de) 1962-10-10
CH387902A (de) 1965-02-15
ES279995A3 (es) 1963-02-01
DE1406196A1 (de) 1968-10-03

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