US3516303A - Lock mechanism - Google Patents

Lock mechanism Download PDF

Info

Publication number
US3516303A
US3516303A US732314A US3516303DA US3516303A US 3516303 A US3516303 A US 3516303A US 732314 A US732314 A US 732314A US 3516303D A US3516303D A US 3516303DA US 3516303 A US3516303 A US 3516303A
Authority
US
United States
Prior art keywords
latch
component
supporting member
projection
detent mechanism
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
US732314A
Inventor
Heinrich Imgrund
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.)
Tarex SA
Original Assignee
Tarex 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 Tarex SA filed Critical Tarex SA
Application granted granted Critical
Publication of US3516303A publication Critical patent/US3516303A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F16D71/00—Mechanisms for bringing members to rest in a predetermined position
    • F16D71/04—Mechanisms for bringing members to rest in a predetermined position providing for selection between a plurality of positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/02—Indexing equipment
    • B23Q16/04—Indexing equipment having intermediate members, e.g. pawls, for locking the relatively movable parts in the indexed position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/14—Rotary member or shaft indexing, e.g., tool or work turret
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents

Definitions

  • U.S. Cl. 74527 1 Claim ABSTRACT OF THE DISCLOSURE In a detent mechanism comprising an oscillating latch co-operating with a movable element, in which one of the components (latch and movable component) has a projection engaging in a V-shaped recess in the other component in order to hold the movable component in a predetermined position, the feature that the latch is articulated with a supporting member through the medium of a projection formed on one of the components (latch and supporting member) and engaging in a V-shaped recess in the other component under the action of an elastic device acting upon the latch, in such a manner that the pivot between latch and its supporting member is totally free of backlash, thus increasing the positional precision with which the movable element is held.
  • This invention relates to a detent embodying an oscillating latch, co-operating with a movable element, on one of which components (latch and movable element), there is formed a projection engaging with a V-shaped recess in the other component in order to hold the movable component in a predetermined position.
  • detent mechanism of this kind the inevitable play in the latch, due to the manner in which it is articulated to its supporting member, is manifested in a corresponding play on the part of the movable element, when in the locked position.
  • the object of the present invention is to overcome this drawback.
  • the detent mechanism in accordance with the invention is characterised in that the latch is articulated with a supporting member through the medium of a projection formed on one of the components (latch and supporting member) and engaging in a V-shaped recess in the other component under the action of an elastic device acting upon the latch, in such a manner that the joint between latch and its supporting member is totally free of backlash, thus increasing the positional precision with which the movable element is held.
  • FIG. 1 is a pictorial view of a first embodiment of detent mechanism for locking a rotary component, in which the latch acts radially in relation to the axis of rotation of said component;
  • FIG. 2 is an elevaiional view of this detent mechanism
  • FIG. 3 is an elevational view of a second embodiment of a detent mechanism for looking a rotary component
  • FIG. 4 is a plan view of a detail of said second embodiment.
  • the detent mechanism illustrated in FIGS. 1 and 2, intended to hold a rotary component 1 rotating about a spindle 2, comprises a latch 3 pivoted on a supporting member 4 through the medium of a projecting portion 3a formed in the latch and engaging in an opened V-slot 5 in said supporting member 4 under the action of a coil spring 6 seating on the one hand against the latch 3 and on the other hand against a fixed component 7.
  • the displacements of the latch 3 are controlled by a link 8 pivoted at the point 9 to the extremity of the latch.
  • the latch possesses a projecting portion 3b engaging in one of a number of radial opened V-slots 10 formed in the component 1.
  • a latch 12 is pivoted on a supporting member 13 through the medium of a projecting portion 13a formed on the supporting member and engaging in an opened V-slot 14 in the latch.
  • the movable element which is to be held or positioned, is constituted by a disc 15, rotatable about a spindle 16 and provided, on one of its faces, with projections 1511 located in radial planes.
  • the latch contains an opened V-slot 17 which engages, under the effect of a return spring 18, with one or other of the projections 15a of the disc 15.
  • a link 19, pivoted at 20 to the latch 12, enables the latter to be moved away against the action of the spring 18, disengaging and releasing the disc 15.
  • the spring 18 plays the part of the two springs 6 and 11 of the first embodiment and simultaneously secures engagement between the slot 14 in the latch 12 and the projection 13a, and the slot 17 and one of the projections 15a.
  • the operational position of the latch 12 is absolutely fixed, there being no play at all at its pivot point with its supporting member 13, so that the angular positions of the disc 15, when it is held, are likewise fixed with a high degree of precision.
  • the above-described detent mechanism has a variety of applications, in particular in machine-tools where it is often necessary to index a rotary table to different angular positions.

Description

June 23, 1970 H. IMGRUND LOCK MECHANISM Filed May 27, 1968 INVENTOR. HEINRICH IMGRUND (and @014 ATTORNEY.
United States Patent 3,516,303 LOCK MECHANISM Heinrich Imgrund, Geneva, Switzerland, assignor to Tarex S.A., Petit-Lancy, Canton of Geneva, Switzerland, a
U.S. Cl. 74527 1 Claim ABSTRACT OF THE DISCLOSURE In a detent mechanism comprising an oscillating latch co-operating with a movable element, in which one of the components (latch and movable component) has a projection engaging in a V-shaped recess in the other component in order to hold the movable component in a predetermined position, the feature that the latch is articulated with a supporting member through the medium of a projection formed on one of the components (latch and supporting member) and engaging in a V-shaped recess in the other component under the action of an elastic device acting upon the latch, in such a manner that the pivot between latch and its supporting member is totally free of backlash, thus increasing the positional precision with which the movable element is held.
This invention relates to a detent embodying an oscillating latch, co-operating with a movable element, on one of which components (latch and movable element), there is formed a projection engaging with a V-shaped recess in the other component in order to hold the movable component in a predetermined position.
In detent mechanism of this kind, the inevitable play in the latch, due to the manner in which it is articulated to its supporting member, is manifested in a corresponding play on the part of the movable element, when in the locked position. The object of the present invention is to overcome this drawback.
The detent mechanism, in accordance with the invention is characterised in that the latch is articulated with a supporting member through the medium of a projection formed on one of the components (latch and supporting member) and engaging in a V-shaped recess in the other component under the action of an elastic device acting upon the latch, in such a manner that the joint between latch and its supporting member is totally free of backlash, thus increasing the positional precision with which the movable element is held.
The accompanying drawing schematically illustrates, by way of example, two embodiments of detent mechanism in accordance with the invention.
In the drawing:
FIG. 1 is a pictorial view of a first embodiment of detent mechanism for locking a rotary component, in which the latch acts radially in relation to the axis of rotation of said component;
FIG. 2 is an elevaiional view of this detent mechanism;
FIG. 3 is an elevational view of a second embodiment of a detent mechanism for looking a rotary component,
'ice
in which the latch acts generally parallel to the axis of rotation of the component; and
FIG. 4 is a plan view of a detail of said second embodiment.
The detent mechanism, illustrated in FIGS. 1 and 2, intended to hold a rotary component 1 rotating about a spindle 2, comprises a latch 3 pivoted on a supporting member 4 through the medium of a projecting portion 3a formed in the latch and engaging in an opened V-slot 5 in said supporting member 4 under the action of a coil spring 6 seating on the one hand against the latch 3 and on the other hand against a fixed component 7.
The displacements of the latch 3 are controlled by a link 8 pivoted at the point 9 to the extremity of the latch.
The latch possesses a projecting portion 3b engaging in one of a number of radial opened V-slots 10 formed in the component 1. A coil spring 11, seating on the one hand against the latch 3 and on the other against the fixed com ponent 7, urges the projection 3b of the latch 3 into one of the slots 10 in the component 1.
With this arrangement, the position of the latch 3, when in the operational condition, is absolutely fixed, unlike the case obtaining if the latch is arranged to pivot about an axis, where there is inevitably some play. The result is that the angular position of the component 1, when held, is likewise absolutely fixed.
In the embodiment shown in FIG. 3, a latch 12 is pivoted on a supporting member 13 through the medium of a projecting portion 13a formed on the supporting member and engaging in an opened V-slot 14 in the latch. The movable element which is to be held or positioned, is constituted by a disc 15, rotatable about a spindle 16 and provided, on one of its faces, with projections 1511 located in radial planes. The latch contains an opened V-slot 17 which engages, under the effect of a return spring 18, with one or other of the projections 15a of the disc 15. A link 19, pivoted at 20 to the latch 12, enables the latter to be moved away against the action of the spring 18, disengaging and releasing the disc 15.
It should be noted that, in the second embodiment, the spring 18 plays the part of the two springs 6 and 11 of the first embodiment and simultaneously secures engagement between the slot 14 in the latch 12 and the projection 13a, and the slot 17 and one of the projections 15a.
In this second embodiment, as in the first embodiment, the operational position of the latch 12 is absolutely fixed, there being no play at all at its pivot point with its supporting member 13, so that the angular positions of the disc 15, when it is held, are likewise fixed with a high degree of precision.
The above-described detent mechanism has a variety of applications, in particular in machine-tools where it is often necessary to index a rotary table to different angular positions.
What I claim is:
1. In a detent mechanism, the combination of an oscillatable latch component,
a movable component cooperant with the latch component,
a first projection on one of the latch component and movable component,
a first projection receiving recess in the other of the latch component and movable component,
4 the projection being receivable in the recess for holding References Cited the movable component in a predetermined position, v UNITED STATES PATENTS a fixed support member, a second projection on one of the latch component and i233 259 Support f"fl 5 3,372,606 3/1968 McGrath 74527 a second pro ection receiving recess on the other of the latch component and support member, FOREIGN PATENTS elastic means for biasing the latch component for effect- 723,118 7/ 1942 Germany.
mg the seating of the second pro ection ln the second 10 FRED c- M ATTERN, JR, Primary Examiner PIOJCCtIHg receiving recess wlth the ]01Ilt between the latch component and support member being free GREEN Assistant Examiner of backlash for increasing the precision in the holding U S L of the movable component. 74813
US732314A 1967-06-30 1968-05-27 Lock mechanism Expired - Lifetime US3516303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH935667A CH458864A (en) 1967-06-30 1967-06-30 Locking mechanism

Publications (1)

Publication Number Publication Date
US3516303A true US3516303A (en) 1970-06-23

Family

ID=4351113

Family Applications (1)

Application Number Title Priority Date Filing Date
US732314A Expired - Lifetime US3516303A (en) 1967-06-30 1968-05-27 Lock mechanism

Country Status (5)

Country Link
US (1) US3516303A (en)
CH (1) CH458864A (en)
DE (1) DE1750741A1 (en)
FR (1) FR1570837A (en)
GB (1) GB1177329A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464948A (en) * 1982-01-25 1984-08-14 The United States Of America As Represented By The Department Of Energy Locking mechanism for indexing device
US4867013A (en) * 1987-07-17 1989-09-19 Braunberger Benjamin A Right angle drive
US5799697A (en) * 1995-08-31 1998-09-01 Aisin Aw Co., Ltd. Pressure regulating valve
US20120286907A1 (en) * 2011-05-09 2012-11-15 Wen-Hsuan Chiang Multi-stage magnetic switch
CN106352899A (en) * 2016-09-22 2017-01-25 顺丰科技有限公司 TDOF (Three Degrees of Freedom) rapid calibration device for inertia measurement unit
CN106438794B (en) * 2016-09-22 2019-06-04 顺丰科技有限公司 Automatic locking positioning device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2060256A (en) * 1934-09-27 1936-11-10 Worthington Pump & Mach Corp Throttle locking device
DE723118C (en) * 1939-05-24 1942-07-29 Nostitz & Koch Notch device for roller switch
US2359661A (en) * 1944-10-03 Calculating machine
US3372606A (en) * 1966-09-13 1968-03-12 Allis Chalmers Mfg Co Hydraulic valve control lever

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2359661A (en) * 1944-10-03 Calculating machine
US2060256A (en) * 1934-09-27 1936-11-10 Worthington Pump & Mach Corp Throttle locking device
DE723118C (en) * 1939-05-24 1942-07-29 Nostitz & Koch Notch device for roller switch
US3372606A (en) * 1966-09-13 1968-03-12 Allis Chalmers Mfg Co Hydraulic valve control lever

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464948A (en) * 1982-01-25 1984-08-14 The United States Of America As Represented By The Department Of Energy Locking mechanism for indexing device
US4867013A (en) * 1987-07-17 1989-09-19 Braunberger Benjamin A Right angle drive
US5799697A (en) * 1995-08-31 1998-09-01 Aisin Aw Co., Ltd. Pressure regulating valve
US20120286907A1 (en) * 2011-05-09 2012-11-15 Wen-Hsuan Chiang Multi-stage magnetic switch
CN106352899A (en) * 2016-09-22 2017-01-25 顺丰科技有限公司 TDOF (Three Degrees of Freedom) rapid calibration device for inertia measurement unit
CN106438794B (en) * 2016-09-22 2019-06-04 顺丰科技有限公司 Automatic locking positioning device
CN106352899B (en) * 2016-09-22 2023-09-26 丰翼科技(深圳)有限公司 Three-degree-of-freedom quick calibration device for inertial measurement unit

Also Published As

Publication number Publication date
CH458864A (en) 1968-06-30
FR1570837A (en) 1969-06-13
DE1750741A1 (en) 1970-02-05
GB1177329A (en) 1970-01-07

Similar Documents

Publication Publication Date Title
US3516303A (en) Lock mechanism
US3874162A (en) Solid state watch stem detent and switch assembly
GB2068449A (en) Combination cylinder lock
US2233743A (en) Resilient fastening device for bearings, particularly for balance staffs of watches
ATE7064T1 (en) PERMUTATION LOCK WITH ONE CAM DISC AND LOCKING DISCS.
US2584580A (en) Multispeed phonograph drive
US3235220A (en) Apparatus for imparting stepwise movement to a carriage
US2660926A (en) Plural filter support and actuating mechanism
US2837826A (en) Angle setting and measuring instrument
US3488109A (en) Objective changing devices
US2996154A (en) Means for blocking a rotatable shaft
US2637970A (en) Index regulator set
US2641899A (en) Chronograph setting hammer system
US3032617A (en) Apparatus for controlling fully automatic washing machines
US3678682A (en) Structure for positioning a watch stem
US4109458A (en) Date and day correcting device of a timepiece
US2294023A (en) Balance bridge with regulator for clockwork mechanism
US3488943A (en) Latching device for the dial on a watch movement
US3067703A (en) Combination rotary hook and bobbinholding basket device for sewing machines
US1845430A (en) Resilient pivot bearing
US3712036A (en) Cam wheel mechanism for watches
US3658162A (en) Apparatus for attaching a type head
US2883868A (en) Adjustable stop
US3099129A (en) Automatic regulation mechanism for timepieces
US2640311A (en) Winding and setting mechanism for watch and clock movements and the like