US2917942A - Rotary locking device - Google Patents

Rotary locking device Download PDF

Info

Publication number
US2917942A
US2917942A US712594A US71259458A US2917942A US 2917942 A US2917942 A US 2917942A US 712594 A US712594 A US 712594A US 71259458 A US71259458 A US 71259458A US 2917942 A US2917942 A US 2917942A
Authority
US
United States
Prior art keywords
shaft
attached
locking
component
bushing
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
US712594A
Inventor
John W Jarrett
Everett L Rice
Original Assignee
John W Jarrett
Everett L Rice
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 John W Jarrett, Everett L Rice filed Critical John W Jarrett
Priority to US712594A priority Critical patent/US2917942A/en
Application granted granted Critical
Publication of US2917942A publication Critical patent/US2917942A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/02Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/20Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05GCONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/06Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in one or a limited number of definite positions only
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05GCONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G2700/00Control mechanisms or elements therefor applying a mechanical movement
    • G05G2700/04Control mechanisms limiting amplitude or adjusting datum position
    • G05G2700/08Control mechanisms for locking members in one or more positions
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H25/00Switches with compound movement of handle or other operating part
    • H01H25/06Operating part movable both angularly and rectilinearly, the rectilinear movement being along the axis of angular movement
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/20Control lever and linkage systems
    • Y10T74/20396Hand operated
    • Y10T74/20474Rotatable rod, shaft, or post
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/20Control lever and linkage systems
    • Y10T74/20576Elements
    • Y10T74/20636Detents
    • Y10T74/20642Hand crank

Description

1959 J. w. JARRETT ETAL 2,917,942

ROTARY LOCKING DEVICE Filed Jan. 31, 1958 INVENT JOHN w. .1422 :vmsrr a. RICE ATWRMEYJ United States Patent ROTARY LOCKING DEVICE John W. Jarrett, Fortville, and Everett L. Rice, Indianapolis, Ind., assignors to the United States of America as represented by the Secretary of the Navy Application January '31, 1958, Serial No. 712,594

'3 Claims. (Cl. 74-504) (Granted under Title 35, US. Code (1952), sec. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

The present invention relates to a locking device and more particularly to a locking device that can be applied to an electrical component such as a rotary switch, potentiometer, or the like, to prevent accidental rotation thereof.

Control panels, such as those used in aircraft, often have large numbers of electrical components such as switches and potentiometers, and because of space limitation these components are often mounted closely together. Consequently, it is very likely that a component may be unintentionally rotated when it should not be, thus creating an insafe condition. The locking device disclosed herein actually serves a dual purpose in that it locks a rotary device against accidental rotation and also has a detent arrangement for setting a rotary device in adesired position.

The locking device disclosed herein is adaptable for mounting to many heretofore available components and requires only a very minor modification of the component to be operable thereon. A shaft is axially slidably attached to the existing shaft of an electrical component, and the attached shaft has at least one lug that is engageable with a plurality of slots in a shaft bushing. The attached shaft is resiliently biased outwardly to retain the lugs within one of the slots and, when in this position, the attached shaft is locked from rotation. When it is desired to rotate the attached shaft, it is first necessary to move it inwardly until the lug is disengaged from the slot. The shaft is then free to be rotated.

It is therefore a general object of the present invention to provide a device that will prevent accidental shaft rotation of an electrieal device,

Another objeet of the invention disclosed herein is to provide a device for locking the shaft of an electrical component in a plurality of positions.

Qther objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing wherein;

Figure 1 is a plan view showing the shaft end of an embodiment of the present invention;

Figure 2 is a partial sectional View taken on line 2-2 of Fig e Figure 3 is a partial sectional view taken on line 3-3 of Figure 1 and showing the attached shaft moved inwardly;

Figure 4 is a plan view showing a shaft and bushing arrangement; and

Figure 5 is a plan view similar to the view shown in Figure 4 but showing the shaft rotated.

Referring now to the drawing, there is shown in Figures 1-3, a locking device 11 that is attached to an elec- 2,917,942 Patented Dec. 22, 1959 trical component 12, such as a rotary switch or potentiometer. The electrical component 12 is of the type adaptable for panel mounting and has a threaded por= tion 13 through which extends a rotatable shaft 14.

The threaded portion 13 of component 12 is passed through a bore 15 in the end of a cylindrical housing 16 and a nut 17 is provided to hold the housing in position. A washer 18 having a lug 19 thereon is positioned around the threaded portion 13, and the lug 19 engages a hole 21 in the end of the cylindrical housing 16 to prevent rotation of the housing relative to the component 12.

A bushing 22 is attached to the end portion of housing 16 by means of screws 23, and a shaft 24 is rotatably mounted within the bore of bushing 22. The shaft 24 has a large diameter portion and a small diameter portion, the small diameter portion having a flat 25 thereon for facilitating the fastening of a knob (not shown). The large diameter portion of shaft 24 is slightly smaller than the bore of bushing 22 and the shaft is axially slidable within the bushing and also capable of rotation. As shown in Figure 4 of the drawing, shaft 24 has a plurality of lugs 26 radiating from the large diameter portion thereof, and these lugs are engageable with a plurality of slots 27 in the inner end of bushing 22. Although three lugs 26 and three slots 27 are shown for purposes of illustration, it should be understood that either a lesser or greater number could be used equally well.

Shaft 24 has a bore 28 and a slot 29 in the large diameter portion that permits the coupling of shaft 24 to the shaft 14 of component 12. A pin 31 is press-fitted into shaft 14 and slot 29 is slidably engageable with pin 31. As shown in Figure 2 of the drawing, slot 29 has sufficient depth to allow shaft 24 to move axially inwardly until lug 26 on shaft 24 is cleared from slot 27, at which time the shaft 24 is unlocked and free to be rotated.

As shown in Figures 2 and 3 of the drawing, a coil spring 32 is provided within the cylindrical housing 16 between the inner face of the housing and the inner face of shaft 24 to bias the shaft 24 outwardly. Thus when lugs 26 are engaged in slots 27, spring 32 retains the shaft 24 in a stationary position and therefore the shaft 24 is maintained in a locked position,

In operation, the shaft 24 is normally maintained in a locked position due to the lugs 26 being engaged in slots 27. When it is desired to rotate the shaft 14 of component 12, it is first necessary to move shaft 24 inwardly until the lugs 26 are cleared from slots 27. Figure 3 of the drawing shows this condition, with the spring 32 being compressed and the lug 26 moved inwardly to clear slot 27. While still applying an inward pressure, the shaft 24 is then rotated in a desired direction and a rotating force is transferred from shaft 24 to pin 31 in shaft 14, to drive shaft 14, which is the component shaft. As shown in Figure 5 of the drawing, after lugs 26 are rotated from being in alignment with slots 27, it is no longer necessary to apply inward pressure on shaft 24, and shaft 24 can be rotated until the lugs are forced into the next adjacent slots by the spring 32.

It can thus be seen that the device herein diselosed provides a convenient locking arrangement for a component shaft in that it is first necessary to apply an in, wardly directed force and then, while applying this force, apply a rotating force. Thus aecidental rotation of a shaft is not likely to occur,

Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that the in- 3 vention may be practiced otherwise than as specifically described.

What is claimed is:

'1. A locking devicefor an electrical component comprising, a cylindrical housing member having an open end and an inside face and removably attached to the shaft end of an electrical component having a rotatable shaft, a bushing fixedly attached to said housing member and having a plurality of radial slots, and attached shaft having an inside face and mounted for rotary movement and axially slidable movement in said bushing with SZliL. side face on said shaft being opposite said inside face on said cylindrical housing, saidattached shaft having a large diameter portion having :a diametral slot on the end thereof and having means for engaging said plurality of slots in said bushing, means on said rotatable shaft of said component in slidable engaging relation with said diametral slot in said attached shaft, and means positioned within said housing member for biasing said attached shaft in a direction outwardly from said electrical component.

2. A locking device as set forth in claim 1 wherein said means for biasing said attached shaft comprises a compression spring mounted between the inside face of said housing member and the inside face of said attached shaft.

3. A locking device for an electrical component comprising, a cylindrical housing member having an open end and an inside face and removably attached to the shaft end of an electrical component having a rotatable shaft, a bushing fixedly attached to said housing member and having a plurality of radial slots, an attached shaft having an inside face and mounted for rotary movement and axially slidable movement in said bushing with said inside face on said shaft being opposite said inside face on said cylindrical housing, said attached shaft having a large diameter portion having a diametral slot on the end thereof and at least one lug extending perpendicular to the longitudinal axis of said attached shaft for engaging said radial slots, a pin fixedly attached to said rotatable shaft of said component and in slidable engagement with said diametrar slot in said attached shaft, and a compression spring mounted between the inside face of said housing member and the inside face of said attached shaft for biasing said attached shaft in a direction outwardly from said electrical component.

References Cited in the file of this patent UNITED STATES PATENTS 1,274,471 Todd Aug. 6, 1918 2,438,045 Gerhardt et al Mar. 16, 1948 2,561,482 Schostak July 24, 1951 2,631,203 Mekelburg Nov. 10, 1953 2,651,281 Nathan Sept. 8, 1953 2,704,466 Way Mar. 22, 1955 2,849,891 Mills Sept. 2, 1958 FOREIGN PATENTS 797,938 France Feb. 24, 1936

US712594A 1958-01-31 1958-01-31 Rotary locking device Expired - Lifetime US2917942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US712594A US2917942A (en) 1958-01-31 1958-01-31 Rotary locking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US712594A US2917942A (en) 1958-01-31 1958-01-31 Rotary locking device

Publications (1)

Publication Number Publication Date
US2917942A true US2917942A (en) 1959-12-22

Family

ID=24862780

Family Applications (1)

Application Number Title Priority Date Filing Date
US712594A Expired - Lifetime US2917942A (en) 1958-01-31 1958-01-31 Rotary locking device

Country Status (1)

Country Link
US (1) US2917942A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139769A (en) * 1962-08-30 1964-07-07 Richard H Gauchat Rotary locking device
US3183740A (en) * 1962-10-04 1965-05-18 Gen Motors Corp Holding means for a movable operating member
US3230793A (en) * 1962-05-10 1966-01-25 Cts Corp Indexing mechanism
US3459064A (en) * 1967-10-30 1969-08-05 Eastman Kodak Co Locking arrangement for photographic apparatus
US3986409A (en) * 1975-07-07 1976-10-19 Raytheon Company Push-to-engage device
US4075593A (en) * 1967-10-26 1978-02-21 King-Seely Thermos Co. Rotatable shaft positioning means
US4339662A (en) * 1980-09-19 1982-07-13 The United States Of America As Represented By The Secretary Of The Navy Safety selector switch including photoelectric detection
EP1160812A2 (en) * 2000-06-02 2001-12-05 REITTER & SCHEFENACKER GmbH & Co. KG Emergency switch for vehicles, in particular for motor vehicles
EP1388872A2 (en) * 2002-08-07 2004-02-11 Matsushita Electric Industrial Co., Ltd. Operating mechanism for rotational switch avoiding unintentional actuation
EP3001245A4 (en) * 2013-05-23 2016-06-29 Olympus Corp Dial device
US10352435B2 (en) * 2014-12-23 2019-07-16 Hyundai Motor Company Integrated electronic shift lever assembly for vehicle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1274471A (en) * 1917-10-12 1918-08-06 Frederick J Todd Gear actuating and locking mechanism.
FR797938A (en) * 1934-11-27 1936-05-06 Cabanes & Cie Ets rotary Commander
US2438045A (en) * 1946-11-01 1948-03-16 Thor Corp Control dial assembly
US2561482A (en) * 1949-05-31 1951-07-24 Abraham W Schostak Motion controlled braked operator
US2631203A (en) * 1946-03-29 1953-03-10 Square D Co Push-button electric switch
US2651281A (en) * 1948-02-28 1953-09-08 Lectra Products Inc Switch mounting
US2704466A (en) * 1955-03-22 Control device
US2849891A (en) * 1954-02-19 1958-09-02 Herbert E Mills Safety handle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704466A (en) * 1955-03-22 Control device
US1274471A (en) * 1917-10-12 1918-08-06 Frederick J Todd Gear actuating and locking mechanism.
FR797938A (en) * 1934-11-27 1936-05-06 Cabanes & Cie Ets rotary Commander
US2631203A (en) * 1946-03-29 1953-03-10 Square D Co Push-button electric switch
US2438045A (en) * 1946-11-01 1948-03-16 Thor Corp Control dial assembly
US2651281A (en) * 1948-02-28 1953-09-08 Lectra Products Inc Switch mounting
US2561482A (en) * 1949-05-31 1951-07-24 Abraham W Schostak Motion controlled braked operator
US2849891A (en) * 1954-02-19 1958-09-02 Herbert E Mills Safety handle

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230793A (en) * 1962-05-10 1966-01-25 Cts Corp Indexing mechanism
US3139769A (en) * 1962-08-30 1964-07-07 Richard H Gauchat Rotary locking device
US3183740A (en) * 1962-10-04 1965-05-18 Gen Motors Corp Holding means for a movable operating member
US4075593A (en) * 1967-10-26 1978-02-21 King-Seely Thermos Co. Rotatable shaft positioning means
US3459064A (en) * 1967-10-30 1969-08-05 Eastman Kodak Co Locking arrangement for photographic apparatus
US3986409A (en) * 1975-07-07 1976-10-19 Raytheon Company Push-to-engage device
US4339662A (en) * 1980-09-19 1982-07-13 The United States Of America As Represented By The Secretary Of The Navy Safety selector switch including photoelectric detection
EP1160812A3 (en) * 2000-06-02 2004-03-03 REITTER & SCHEFENACKER GmbH & Co. KG Emergency switch for vehicles, in particular for motor vehicles
EP1160812A2 (en) * 2000-06-02 2001-12-05 REITTER & SCHEFENACKER GmbH & Co. KG Emergency switch for vehicles, in particular for motor vehicles
EP1388872A2 (en) * 2002-08-07 2004-02-11 Matsushita Electric Industrial Co., Ltd. Operating mechanism for rotational switch avoiding unintentional actuation
EP1388872A3 (en) * 2002-08-07 2005-09-28 Matsushita Electric Industrial Co., Ltd. Operating mechanism for rotational switch avoiding unintentional actuation
EP3001245A4 (en) * 2013-05-23 2016-06-29 Olympus Corp Dial device
US9455103B2 (en) 2013-05-23 2016-09-27 Olympus Corporation Dial device
US10352435B2 (en) * 2014-12-23 2019-07-16 Hyundai Motor Company Integrated electronic shift lever assembly for vehicle

Similar Documents

Publication Publication Date Title
US8992148B2 (en) Locking connector
US4939622A (en) Removable electrical or electronic equipment assembly comprising a box and its housing
US7870765B2 (en) Safing lock mechanism
US3563098A (en) Automatic quick release mechanism
US2816471A (en) Clevis pin with lockable operating means
US3662618A (en) Instrument knob having integral detent mechanism and panel mount socket means
US4552000A (en) Steering shaft anti-theft device for motor vehicle
US4679835A (en) Half turn cabinet latch with three-part primary operating element
CA2220818C (en) Lockable turnbuckle assembly
US6912124B2 (en) Lever system for moving a component within a chassis
CA1041389A (en) Spring loaded split nut
US3127784A (en) Anti-backlash gears
US4671547A (en) Half turn cabinet latch with door gasket clamping capability
US4851621A (en) Operating handle for an enclosed electric switch
US2979554A (en) Insulated mounting clamp for electrical components
US4597453A (en) Drive unit with self-aligning gearing system
US6543956B2 (en) Device for connecting structural components
US3613751A (en) Adjustable screwdriver
US4053195A (en) Theftproof connector assembly
US2926382A (en) Quick disconnect and connect hinge
DE3736319C2 (en)
GB2222649A (en) Captive screw assembly
US6527435B2 (en) Assembling device
US3304794A (en) Mechanisms incorporating recirculating ball screw-jacks
US5165738A (en) Latch assembly