US2574726A - Knob set privacy latch - Google Patents

Knob set privacy latch Download PDF

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Publication number
US2574726A
US2574726A US559948A US2574726A US 2574726 A US2574726 A US 2574726A US 559948 A US559948 A US 559948A US 2574726 A US2574726 A US 2574726A
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United States
Prior art keywords
spindle
locking plate
knob
locking
latch
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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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Best Frank Ellison
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Individual
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Individual
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Priority to US559948 priority Critical patent/US2574726A/en
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Publication of US2574726A publication Critical patent/US2574726A/en
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0054—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed
    • E05B17/0058—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed with non-destructive disengagement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B13/00—Devices preventing the key or the handle or both from being used
    • E05B13/002—Devices preventing the key or the handle or both from being used locking the handle
    • E05B13/004—Devices preventing the key or the handle or both from being used locking the handle by locking the spindle, follower, or the like
    • 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
    • Y10T292/00—Closure fasteners
    • Y10T292/96—Latch-spindle catches

Definitions

  • My invention pertains to tubular locks and latches and is particularly directed to privacy latches for use in conjunction with knob sets, especially on interior doors, such as residential bath or toilet doors.
  • My invention consists of a spring walled spindle lock carried. by a manually operated locking plate adapted for assembly beneath the knob set escutcheon on the interior side of said doors and adapted to lock the spindle against ordinary rotation, but to yield to forced. rotation, thus ordinarily granting privacy, but affording quick emergency entrance from the outside.
  • Figure 1 shows a fragment of a door and knob set, and particularly locking plate ill in longitudinal section as taken in line l-l Figure 2.
  • Figure 2 shows a front View of locking latch 10 and a cross-section of spindle l 2.
  • Figure 3 shows an alternate form II of the said locking latch.
  • Figure 1 shows a fragment of a door I3, with escutcheon l4 secured thereto by screws l5, trapping locking plate I in place therebetween.
  • Figure 2 shows the locking plate having the usual spring clip l9 adapted to function with the lower screw 15 to guide and hold the said locking plate in an up or a down position. It also has the usual slot 2
  • the novel element of this invention consists of spring walled spindle lock 22 comprisinga stifi spring secured in place in locking plate In and adapted to normally lock the spindle I2 against rotation, when the locking plate I0 is in its up or locking position, but adapted to provide ample space for free rotation when in its unlatched or down position.
  • emergency entrance may be provided by strongly and very forcefully rotating the outside knob, under the impulse of which prongs 23 will spread apart and permit the spindle to turn, thus retracting the main belt of the tubular lock.
  • the spindle remains stationary between the vice like prongs 23 that thus indicate the room is occupied and ordinarily affords privacy.
  • the spindle In its lower or unlocked position, the spindle takes the dotted position 29.
  • a dotted circle 30 shows the rotative clearance of the spindle 12 in its unlocked position.
  • Figure 3 shows an alternate locking plate stamped out in a single piece.
  • An indented spindle 25 having indents 26 is used here.
  • the spring prongs 21 having projections 28 serve the function of locking the locking plate I I in its upper or locked position, while gravity holds it in its down or unlocked position.
  • a privacy latch set the combination of elements comprising a knob, a spindle, a rose, a spindle locking plate, a spindle opening in said locking plate, a spindle clearance portion of said opening and a spindle locking portion of said opening, a spring walled spindle lock bounding said spindle opening and a thumb piece connected to said locking plate, said locking plate being slideably housed relative to said spindle beneath said rose, and being manually positionable selectively with each of said portions of said opening contiguous with said spindle, said spring walled spindle lock normally locking said spindle against rotation when the spindle locking portion of said opening is contiguous therewith but forceably releasable when abnormal rotary torque is applied to said spindle.

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  • Toilet Supplies (AREA)

Description

Nov. 13, .1951 F. E. BEST KNOB SET PRIVACY LATCH Filed Jan. 51, 1948 INVENTOR Patented Nov. 13, 1951 UNITED STATES PATENT OFFICE KNOB SET PRIVACY LATCH Frank Ellison Best, Indianapolis, Ind.
Application January 31, 1948, Serial No. 5,599
1 Claim. 1
My invention pertains to tubular locks and latches and is particularly directed to privacy latches for use in conjunction with knob sets, especially on interior doors, such as residential bath or toilet doors.
My invention consists of a spring walled spindle lock carried. by a manually operated locking plate adapted for assembly beneath the knob set escutcheon on the interior side of said doors and adapted to lock the spindle against ordinary rotation, but to yield to forced. rotation, thus ordinarily granting privacy, but affording quick emergency entrance from the outside.
I illustrate my invention by the accompanying drawing, in which Figure 1 shows a fragment of a door and knob set, and particularly locking plate ill in longitudinal section as taken in line l-l Figure 2.
Figure 2 shows a front View of locking latch 10 and a cross-section of spindle l 2.
Figure 3 shows an alternate form II of the said locking latch.
Figure 1 shows a fragment of a door I3, with escutcheon l4 secured thereto by screws l5, trapping locking plate I in place therebetween.
Knob shank l6 and spindle l2, mating in escutcheon rose 11, complete this view.
Figure 2, shows the locking plate having the usual spring clip l9 adapted to function with the lower screw 15 to guide and hold the said locking plate in an up or a down position. It also has the usual slot 2|] adapted to cooperate with the upper screw l to align said locking plate relative to the related elements.
It is also provided with the thumb piece 2|.
The novel element of this invention consists of spring walled spindle lock 22 comprisinga stifi spring secured in place in locking plate In and adapted to normally lock the spindle I2 against rotation, when the locking plate I0 is in its up or locking position, but adapted to provide ample space for free rotation when in its unlatched or down position.
Many users of this type of lock desire means of emergency entrance and variou devices have been placed on the market to aiford such a convenience.
To meet this demand and simplify the mechanism, I have made this invention which is much simpler than former methods used, the predecessor device being set forth in Patent No. 1,760,394.
With this device installed, emergency entrance may be provided by strongly and very forcefully rotating the outside knob, under the impulse of which prongs 23 will spread apart and permit the spindle to turn, thus retracting the main belt of the tubular lock.
To any turning pressure on the outside knob of a lesser degree than said very forceful rotation, the spindle remains stationary between the vice like prongs 23 that thus indicate the room is occupied and ordinarily affords privacy.
In its lower or unlocked position, the spindle takes the dotted position 29. A dotted circle 30 shows the rotative clearance of the spindle 12 in its unlocked position.
Figure 3 shows an alternate locking plate stamped out in a single piece.
It also dispenses with spring clip 19, a slot 24 cooperating with lower screw I5 to guide and permit up and down motion of said locking plate II.
An indented spindle 25 having indents 26 is used here. The spring prongs 21 having projections 28 serve the function of locking the locking plate I I in its upper or locked position, while gravity holds it in its down or unlocked position.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:
In a privacy latch set, the combination of elements comprising a knob, a spindle, a rose, a spindle locking plate, a spindle opening in said locking plate, a spindle clearance portion of said opening and a spindle locking portion of said opening, a spring walled spindle lock bounding said spindle opening and a thumb piece connected to said locking plate, said locking plate being slideably housed relative to said spindle beneath said rose, and being manually positionable selectively with each of said portions of said opening contiguous with said spindle, said spring walled spindle lock normally locking said spindle against rotation when the spindle locking portion of said opening is contiguous therewith but forceably releasable when abnormal rotary torque is applied to said spindle.
FRANK ELLISON BEST.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 152,774 Steele July 7, 1874 991,018 Powers May 2, 1911 1,225,950 Fuller May 15, 1917 1,760,394 Best et a1. May 27, 1930
US559948 1948-01-31 1948-01-31 Knob set privacy latch Expired - Lifetime US2574726A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068874A (en) * 1976-03-01 1978-01-17 W & F Manufacturing Inc. Rotary latch mechanism with locking device
US4418970A (en) * 1981-02-20 1983-12-06 Leslie Metal Arts Company Rotary-position catch for rotatable shelf units
US5072978A (en) * 1990-08-30 1991-12-17 Johnathan Woodward Inside lock for latches of camper shells, and similar structures
DE102009023130A1 (en) * 2009-05-20 2010-11-25 Hafi Beschläge GmbH Fitting for e.g. window, has cover rosette crossing base part and comprising opening that is aligned with assembly opening in base part such that connecting element is inserted into assembly opening by cover rosette

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US152774A (en) * 1874-07-07 Improvement in door-buttons
US991018A (en) * 1910-05-09 1911-05-02 John Powers Knob-spindle fastener.
US1225950A (en) * 1914-08-25 1917-05-15 Mergott J E Co Bag-fastener.
US1760394A (en) * 1927-08-30 1930-05-27 Frank E Best Inc Catch plate for knob latches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US152774A (en) * 1874-07-07 Improvement in door-buttons
US991018A (en) * 1910-05-09 1911-05-02 John Powers Knob-spindle fastener.
US1225950A (en) * 1914-08-25 1917-05-15 Mergott J E Co Bag-fastener.
US1760394A (en) * 1927-08-30 1930-05-27 Frank E Best Inc Catch plate for knob latches

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068874A (en) * 1976-03-01 1978-01-17 W & F Manufacturing Inc. Rotary latch mechanism with locking device
US4418970A (en) * 1981-02-20 1983-12-06 Leslie Metal Arts Company Rotary-position catch for rotatable shelf units
US5072978A (en) * 1990-08-30 1991-12-17 Johnathan Woodward Inside lock for latches of camper shells, and similar structures
DE102009023130A1 (en) * 2009-05-20 2010-11-25 Hafi Beschläge GmbH Fitting for e.g. window, has cover rosette crossing base part and comprising opening that is aligned with assembly opening in base part such that connecting element is inserted into assembly opening by cover rosette
DE102009023130B4 (en) * 2009-05-20 2017-06-08 Hafi Beschläge GmbH Hardware for windows, doors or gates

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