US3102174A - Switch of the screw selector type - Google Patents

Switch of the screw selector type Download PDF

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Publication number
US3102174A
US3102174A US160471A US16047161A US3102174A US 3102174 A US3102174 A US 3102174A US 160471 A US160471 A US 160471A US 16047161 A US16047161 A US 16047161A US 3102174 A US3102174 A US 3102174A
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US
United States
Prior art keywords
switch
lever
sleeve
levers
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US160471A
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English (en)
Inventor
Baudet Jacques
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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
Application filed by La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Application granted granted Critical
Publication of US3102174A publication Critical patent/US3102174A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
    • F16D7/06—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with intermediate balls or rollers
    • F16D7/10—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with intermediate balls or rollers moving radially between engagement and disengagement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/46—Adaptations of switches or switchgear
    • B66B1/52—Floor selectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H35/14—Mechanisms with only two stable positions, e.g. acting at definite angular positions
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G15/00—Mechanical devices for initiating a movement automatically due to a specific cause
    • G05G15/04—Mechanical devices for initiating a movement automatically due to a specific cause due to distance or angle travelled by a member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/14—Operating parts, e.g. turn knob
    • H01H19/18—Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H01H3/58—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using friction, toothed, or other mechanical clutch

Definitions

  • the present invention relates to :an 4electric switch for operating or controlling 'an industrial apparatus such as a lifting device or the like, having an alternating movement, as for example a hydraulic pressure accumulator.
  • the operating shaft can carry fout a number of revolutions, being coupled for example -to the cage of a lift by means of a suitable step-down gearing, so that the total length ⁇ of the helix described by the operating arms is in relation to the total height of displacement of the cage.
  • micro-switches which themselves comprise two pivoted levers lof unequal length and cou-pled ⁇ together by a U-shaped or omega-shaped spring, one of Ithese levers being actuated by 1an operating member and transmitting this ⁇ actuation to the other lever which carries a contact stud moving .between two fixed studs.
  • a driving device with balls rigidly fixed to Ithe rotating shaft transmits the rotation of the said shaft.
  • the ball device operates also as .a de-clutching limiter, and to this end, the edges of the grooves are ilattened over about half their length, .and facing :a flattened portion of an edge is la non-flattened portion of the opposite edge ot the other groove.
  • FIG. l is a view vin cross-section or" a switch of the Screw selector type in 4accordance with the invention.
  • FIG. 2 is a view in longitudinal section of the sleeve with a helicoidal travel.
  • FIG. 3 is a diagram representing the grooves off the internal lining of the sleeve.
  • FIGS. 7. and 8 Show respectively in sectional elevation and in plan View, the forked lever of the rocker device.
  • FIGS. 9 and 10 show also in sectional elevation and in plan view, the second lever of the rocker device.
  • FIGS. ll and l2. are views locking on the end and from above the spring overshooting the dead centre.
  • the apparatus comprises a shaft 1 driven in rotation by a pinion or 'gear 2 under the action of a contnolled moving body.
  • a fixed screw 3 fast with a frame 4.
  • a rotating and sliding ⁇ sleeve 5 is provided on one end 6 of its bore with a nut 7 threaded on said screw 3, whereas the other portion 8 ⁇ of the bore, 1turned towards the shaft, receives the movement of this latter by a member 9 projecting yfrom .
  • the said shaft which may be ⁇ a lug or a key and ⁇ slides in lgrooves I10 and 10a of the sleeve (see FIG. l).
  • the member projecting -f-rorn the shaft is advantage- Atou-sly constituted by at least one set of two balls 11 and
  • the liner 5al of moulded material comprises all the' working par-ts of the sleeve, namely the nut 7 ⁇ and the longitudinal grooves 10 .and 10a, permitting the drive the spring 26.
  • Therocker device17 is of the double-acting type comprising the combination:
  • the first lever Ztl is provided at one extremity with a forked portion '25 mounted so as tobe driven, rocked and then left in its stable position by the helical rotation of the arm 16.
  • This first lever is made in the :forni ⁇ of a frame through which the shaft 2.2 ⁇ passes in the bores 22a and; containing 'the' smaller second lever 21, the whole lstress ofthe de-iclutching.
  • the choiceiof one of the edges being arranged like a pair of scissors with arms ol' unequal v 'length (FIGS. 4 to 8).
  • the small lever 21 is also traversed by the shaft Z2, passing through ⁇ a hole or bore 22a formed in this lever.
  • the hole 22a of the lever 21 is of course in alignment with the holes 22a of the 4frame lof the lever 20;
  • the small lever Z1 is provided at the extremity opposite tothe spring 24 with la heel Z6 which transmits motion by contact with the push-rod l2,7 ⁇ of vthe micro-switch 18 (FIGS. 4 to 6 ⁇ and 9 and 10).
  • One or rbothof these levers may preferably be or light moulded material with high resistance to wear.
  • the dead-centre overshoot spring 24 is a spring blade curved in a U, with two lateral slots 29 on one arm 28,
  • the knife-edge 23 of the lever Ztl is provided at its eX- tremities with noses l3f?. which engage in the slots 29 of f i v the following manner:
  • the driving device with balls 11 and ⁇ 11a transmits the rotational movement ⁇ of the shaft ⁇ 1 to the sleeve 5 in one Y direction or the other, by reason ⁇ ofthe housing of the balls 11'and 11a in the grooves 1i) and 10a of the sleeve.
  • This ball driving device also acts 'as an effort limiter which automatically idisengages if the' sleeve comes at the end of its travel against the walls of the casingeither on the end 6 or on the end 8.
  • the spring 24 is compressed by oney of its arms. ⁇
  • the arm 16 again turns through a very small angle
  • the main advantage of the rocker device accordingto the invention resides in that ⁇ the pressure on the electrical contacts of the microswitch 13, which is annulled at the moment when the contacts separate, cannot be vannulled slowly while the levers 2t) and 2-1 are in the vicinity of the position of equilibrium, for, at that moment, the push-rod 27 is still in one of its extreme positions (FIGS. 4 and 6);
  • rocker device 17 have a common shaft 2,2, which simplies the'construction.
  • micro-switch in operative relationship with said pivoted levers positioned to be actuated lby one of said llevers and having a snap-action blade
  • characand al device 4 with balls ⁇ coupled to said rotating shaft and in ⁇ driving relationship with said sleeve, said balls located in said longitudinal grooves of said sleeve.
  • the screw type selector of c1-aim 4 further characterized -by said levers being articulated as scissors and having knifeedges, andfsaid U-spring being supported on said knife-edges of said levers. 6.
  • the screw type selector of claim 4 further characterized by the edges of said grooves -being flattened over about half of their length so that one attened portion of an edge faces a non-attened Iportion of the opposite edge of another groove and so that said device with 'balls is adapted to operate either as a drive for said grooved sleeve or as a de-clutching limiter device.
  • the screw type selector of claim 6 further characterized -by said 4lever-s being articulated as scissors and having knife-edges, and said U-spring Ibeing supported on said knife-edges of said levers.
  • the screw type selector of claim 1 lfurther characterized by an internal liner for said sleeve madeffrom a plastic material permitting dry friction and having longitudinal grooves therein, and a device with balls coupled to said rotating shaft and in driving relationship with said sleeve, said balls located in said longitudinal grooves of said sleeve.
  • said screw type selector of claim 8 further characterized by said levers being articulated as scissors and having knife-edges land said U-spring being supported on said knife-edges of said levers.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switches With Compound Operations (AREA)
US160471A 1960-12-23 1961-12-19 Switch of the screw selector type Expired - Lifetime US3102174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR847910A FR1283349A (fr) 1960-12-23 1960-12-23 Interrupteur du type sélecteur à vis

Publications (1)

Publication Number Publication Date
US3102174A true US3102174A (en) 1963-08-27

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ID=8745435

Family Applications (1)

Application Number Title Priority Date Filing Date
US160471A Expired - Lifetime US3102174A (en) 1960-12-23 1961-12-19 Switch of the screw selector type

Country Status (10)

Country Link
US (1) US3102174A (enrdf_load_html_response)
AT (1) AT238803B (enrdf_load_html_response)
BE (1) BE611585A (enrdf_load_html_response)
CH (1) CH385323A (enrdf_load_html_response)
DE (1) DE1149777B (enrdf_load_html_response)
ES (1) ES273208A1 (enrdf_load_html_response)
FR (1) FR1283349A (enrdf_load_html_response)
GB (1) GB947824A (enrdf_load_html_response)
LU (1) LU40980A1 (enrdf_load_html_response)
NL (1) NL272847A (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286049A (en) * 1965-08-23 1966-11-15 Heppenstall Co Switch unit with integral contact and actuator structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE304151C (enrdf_load_html_response) *
CH271495A (de) * 1948-10-02 1950-10-31 Gmbh Robert Bosch In Verbindung mit einer Welle stehende Schalteinrichtung, welche bei Drehrichtungsumkehr betätigt wird.
DE1016798B (de) * 1952-11-24 1957-10-03 Deuta Werke Gmbh Schleppschalter-Antrieb unter Verwendung einer in beiden Drehrichtungen umlaufenden Welle
US2951920A (en) * 1957-07-15 1960-09-06 Vemco Products Inc Rotary limit switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE304151C (enrdf_load_html_response) *
CH271495A (de) * 1948-10-02 1950-10-31 Gmbh Robert Bosch In Verbindung mit einer Welle stehende Schalteinrichtung, welche bei Drehrichtungsumkehr betätigt wird.
DE1016798B (de) * 1952-11-24 1957-10-03 Deuta Werke Gmbh Schleppschalter-Antrieb unter Verwendung einer in beiden Drehrichtungen umlaufenden Welle
US2951920A (en) * 1957-07-15 1960-09-06 Vemco Products Inc Rotary limit switch

Also Published As

Publication number Publication date
LU40980A1 (enrdf_load_html_response) 1962-02-19
CH385323A (fr) 1964-12-15
GB947824A (en) 1964-01-29
BE611585A (fr) 1962-06-15
FR1283349A (fr) 1962-02-02
NL272847A (enrdf_load_html_response)
AT238803B (de) 1965-03-10
ES273208A1 (es) 1962-06-16
DE1149777B (de) 1963-06-06

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