US3427680A - Knob locking device - Google Patents

Knob locking device Download PDF

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Publication number
US3427680A
US3427680A US632725A US3427680DA US3427680A US 3427680 A US3427680 A US 3427680A US 632725 A US632725 A US 632725A US 3427680D A US3427680D A US 3427680DA US 3427680 A US3427680 A US 3427680A
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United States
Prior art keywords
knob
ring
locking
spindle
recess
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Expired - Lifetime
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US632725A
Inventor
Frank Peter Gilbert
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AC Cossor Ltd
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AC Cossor Ltd
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Publication date
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
    • G05G1/10—Details, e.g. of discs, knobs, wheels or handles
    • G05G1/12—Means for securing the members on rotatable spindles or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/08—Turn knobs
    • H01H3/10—Means for securing to shaft of driving mechanism

Definitions

  • the invention relates to a self-locking knob.
  • a self-locking knob including a fixed resilient ring member disposed about the spindle of the knob and so as to fit within a recess of the knob and an independently rotatable locking member having a plurality of symmetrically-arranged radial extensions which, on rotation of the locking member from a free to a locking position press the ring member into engagement with the wall of the recess thereby locking the knob in any desired angular position.
  • the ring member may be a split annular ring and the said extensions of the locking member may extend within the gaps between the sections of the ring when the locking member is in its free position.
  • the split ring may project from a disc, in which case it may be made resilient by the inclusion of slits between the ring and the disc at the end of each section of the ring.
  • FIG. 1 is an exploded perspective view of a potentiometer knob
  • FIG. 2 is a horizontal section of the knob shown in FIG. 1.
  • FIG. 1 there is illustrated a knob head for a potentiometer 1 which is attached to a frame 2.
  • the knob head 3 is mounted on one end of a spindle 4 protruding from a threaded bush 5 which forms part of the potentiometer and which enables the potentiometer to be secured to the frame by means of a thin hexagonal nut 6.
  • the end of the knob head has a cylindrical recess (not shown) which houses a brass ring 7.
  • the knob head may be moulded with the ring 7 as an insert or the ring may have an inwardly-directed flange on its upper edge adapted to engage a structure designed to be secured to the spindle and over which the knob head is then fitted.
  • the ring is designed so as to fit loosely round two ring-sections 8 which are fixed to the frame 2.
  • the sections have slits 9 which provide resilient tongues 10.
  • the locking member 11 is rotatable about the knob spindle and has a handle 12 and two opposing extensions 3,427,680 Patented Feb. 18, 1969 13 having curved edges 14. These extensions have a radius which is between that of the inner and outer radii of the sections, so that when these pieces are in the gap between the sections the knob is free to rotate. However, rotation of the member, in a clockwise manner, will allow the extensions to slide in front of the tongues 10, forcing the tongues .10 outwards so that they press firmly against the surrounding ring and lock the knob.
  • a self-locking knob comprising,
  • knob-head mounted on one end of said spindle and having a recess of circular cross-section surrounding said spindle
  • said ring member comprises a split annular ring having symmetrically-disposed sections and in which said extensions extend 'within the gaps between said sections when said locking member is in said free position.
  • a knob according to claim 2 further comprising a cup-shaped member having a base adapted to be fixed to said frame and having split walls forming said split ring.
  • said cupshaped member includes slits between said base and said walls and extending from the gaps between said sections.
  • a knob according to claim 4 further comprising a further ring fixed within said recess so as to form an internal wall of said recess against which said ring member is urged when in locking engagement.
  • a knob according to claim 1 further comprising a further ring fixed within said recess so as to form an internal wall of said recess against which said ring member is urged when in locking engagement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)
  • Adjustable Resistors (AREA)

Description

Feb. 18, 1969 F. P. GILBERT KNOB LOCKING DEVICE Filed April 21, 1967 United States Patent land Filed Apr. 21, 1967, Ser. No. 632,725 Claims priority, application Great Britain, May 6, 1966,
20,191/ 66 US. Cl. 16-121 6 Claims Int. Cl. H01e /02; A47b 95/02; B65d 25/28 ABSTRACT OF THE DISCLOSURE A knob in which rotation of a locking member expands a ring to lock the knob in any position.
The invention relates to a self-locking knob.
According to the present invention there is provided a self-locking knob including a fixed resilient ring member disposed about the spindle of the knob and so as to fit within a recess of the knob and an independently rotatable locking member having a plurality of symmetrically-arranged radial extensions which, on rotation of the locking member from a free to a locking position press the ring member into engagement with the wall of the recess thereby locking the knob in any desired angular position.
The ring member may be a split annular ring and the said extensions of the locking member may extend within the gaps between the sections of the ring when the locking member is in its free position.
The split ring may project from a disc, in which case it may be made resilient by the inclusion of slits between the ring and the disc at the end of each section of the ring.
An embodiment of the invention will be described with reference to the accompanying drawings:
FIG. 1 is an exploded perspective view of a potentiometer knob,
FIG. 2 is a horizontal section of the knob shown in FIG. 1.
In FIG. 1 there is illustrated a knob head for a potentiometer 1 which is attached to a frame 2. The knob head 3 is mounted on one end of a spindle 4 protruding from a threaded bush 5 which forms part of the potentiometer and which enables the potentiometer to be secured to the frame by means of a thin hexagonal nut 6. The end of the knob head has a cylindrical recess (not shown) which houses a brass ring 7. The knob head may be moulded with the ring 7 as an insert or the ring may have an inwardly-directed flange on its upper edge adapted to engage a structure designed to be secured to the spindle and over which the knob head is then fitted. The ring is designed so as to fit loosely round two ring-sections 8 which are fixed to the frame 2. The sections have slits 9 which provide resilient tongues 10.
The locking member 11 is rotatable about the knob spindle and has a handle 12 and two opposing extensions 3,427,680 Patented Feb. 18, 1969 13 having curved edges 14. These extensions have a radius which is between that of the inner and outer radii of the sections, so that when these pieces are in the gap between the sections the knob is free to rotate. However, rotation of the member, in a clockwise manner, will allow the extensions to slide in front of the tongues 10, forcing the tongues .10 outwards so that they press firmly against the surrounding ring and lock the knob.
I claim:
'1. A self-locking knob comprising,
a spindle,
a knob-head mounted on one end of said spindle and having a recess of circular cross-section surrounding said spindle,
means for rotatably mounting said spindle on a frame,
a resilient ring member fitting within said recess of said knob head and arranged to be fixed to said frame,
a locking member rotatably mounted on said spindle,
means for rotating said locking member with respect to said spindle and said frame, and
a plurality of symmetrically-disposed extensions on said locking member arranged to engage said ring member on rotation of said locking member from a free to a locking position and to urge said ring member into locking engagement with said knob-head.
2. A knob according to claim 1 in which said ring member comprises a split annular ring having symmetrically-disposed sections and in which said extensions extend 'within the gaps between said sections when said locking member is in said free position.
3. A knob according to claim 2 further comprising a cup-shaped member having a base adapted to be fixed to said frame and having split walls forming said split ring.
4. A knob according to claim 3, wherein said cupshaped member includes slits between said base and said walls and extending from the gaps between said sections.
5. A knob according to claim 4 further comprising a further ring fixed within said recess so as to form an internal wall of said recess against which said ring member is urged when in locking engagement.
6. A knob according to claim 1 further comprising a further ring fixed within said recess so as to form an internal wall of said recess against which said ring member is urged when in locking engagement.
References Cited UNITED STATES PATENTS 2,433,794 12/1947 Springman 188--7 3 3,227,985 1/1966 Hardison et al. 338162 3,366,911 1/1968 Wilson et al. 338-197 3,384,727 5/1968 Zavertnik et al. 200-169 XR DONALD A. GRIFFIN, Primary Examiner.
US. Cl. X.R.
US632725A 1966-05-06 1967-04-21 Knob locking device Expired - Lifetime US3427680A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20191/66A GB1165682A (en) 1966-05-06 1966-05-06 Improvements in Locking Knobs

Publications (1)

Publication Number Publication Date
US3427680A true US3427680A (en) 1969-02-18

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US632725A Expired - Lifetime US3427680A (en) 1966-05-06 1967-04-21 Knob locking device

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GB (1) GB1165682A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887963A (en) * 1974-06-19 1975-06-10 Scm Corp Control knob assembly
US4035759A (en) * 1973-03-19 1977-07-12 Cts Corporation Electrical control having an insulated shaft extension
US5231892A (en) * 1992-07-20 1993-08-03 Deere & Company Hitch control interface assembly
US5469125A (en) * 1993-04-15 1995-11-21 Matsushita Electric Industrial Co., Ltd. Rotary electronic device
US5936512A (en) * 1996-07-16 1999-08-10 Apag Elektronik Ag Rotary potentiometer
US6041868A (en) * 1997-12-10 2000-03-28 Case Corporation Mechanism for controlling implement position
US6154928A (en) * 1998-12-30 2000-12-05 Bel-Art Products, Inc. Gripper adapter for doorknobs
US9684329B2 (en) 2014-06-22 2017-06-20 Trevor Lawson Automatic locking knob assemblies and methods of use
US11960315B1 (en) 2023-10-25 2024-04-16 Rangesafe, Llc Automatically locking, releasable, safety knob assembly systems
USD1036930S1 (en) 2022-03-16 2024-07-30 Rangesafe, Llc Safety knob

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2478566A (en) * 2010-03-10 2011-09-14 David Bernard Mapleston Potentiometer Gripping Device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433794A (en) * 1944-03-09 1947-12-30 Farnsworth Res Corp Dial lock
US3227985A (en) * 1963-01-21 1966-01-04 Bourns Inc Rotary instrument brake
US3366911A (en) * 1963-12-10 1968-01-30 Cts Corp Electrical control with panel mounting means
US3384727A (en) * 1966-02-28 1968-05-21 Killark Electric Mfg Company Switch operator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433794A (en) * 1944-03-09 1947-12-30 Farnsworth Res Corp Dial lock
US3227985A (en) * 1963-01-21 1966-01-04 Bourns Inc Rotary instrument brake
US3366911A (en) * 1963-12-10 1968-01-30 Cts Corp Electrical control with panel mounting means
US3384727A (en) * 1966-02-28 1968-05-21 Killark Electric Mfg Company Switch operator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035759A (en) * 1973-03-19 1977-07-12 Cts Corporation Electrical control having an insulated shaft extension
US3887963A (en) * 1974-06-19 1975-06-10 Scm Corp Control knob assembly
US5231892A (en) * 1992-07-20 1993-08-03 Deere & Company Hitch control interface assembly
US5469125A (en) * 1993-04-15 1995-11-21 Matsushita Electric Industrial Co., Ltd. Rotary electronic device
US5936512A (en) * 1996-07-16 1999-08-10 Apag Elektronik Ag Rotary potentiometer
US6041868A (en) * 1997-12-10 2000-03-28 Case Corporation Mechanism for controlling implement position
US6154928A (en) * 1998-12-30 2000-12-05 Bel-Art Products, Inc. Gripper adapter for doorknobs
US9684329B2 (en) 2014-06-22 2017-06-20 Trevor Lawson Automatic locking knob assemblies and methods of use
US10452093B2 (en) 2014-06-22 2019-10-22 Rangesafe, Llc Automatic locking knob assemblies and methods of use
USD1036930S1 (en) 2022-03-16 2024-07-30 Rangesafe, Llc Safety knob
US11960315B1 (en) 2023-10-25 2024-04-16 Rangesafe, Llc Automatically locking, releasable, safety knob assembly systems

Also Published As

Publication number Publication date
GB1165682A (en) 1969-10-01

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