US769769A - Lock. - Google Patents

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US769769A
US769769A US1903183819A US769769A US 769769 A US769769 A US 769769A US 1903183819 A US1903183819 A US 1903183819A US 769769 A US769769 A US 769769A
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Prior art keywords
knob
shank
latch
roll
lock
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Byron Phelps
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    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B55/00Locks in which a sliding latch is used also as a locking bolt
    • E05B55/005Cylindrical or tubular locks
    • 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
    • Y10T70/00Locks
    • Y10T70/50Special application
    • Y10T70/5093For closures
    • Y10T70/5155Door
    • Y10T70/5199Swinging door
    • Y10T70/5372Locking latch bolts, biased
    • Y10T70/5385Spring projected
    • Y10T70/5389Manually operable
    • Y10T70/55Dogged bolt or connections
    • 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
    • Y10T70/00Locks
    • Y10T70/50Special application
    • Y10T70/5093For closures
    • Y10T70/5155Door
    • Y10T70/5199Swinging door
    • Y10T70/5372Locking latch bolts, biased
    • Y10T70/5385Spring projected
    • Y10T70/5389Manually operable
    • Y10T70/55Dogged bolt or connections
    • Y10T70/5513By manipulator

Definitions

  • My invention has particular utility in connection with such looks as are used for bathroom or bed-room doors.
  • the said lock may be operated by either knob, or the inside knob may be employed without the use of any separate instrumentality for the purpose of throwing a locking device into such position that the outer knob is held against rotation.
  • I also provide means whereby although the outer knob is locked against rotation the same may be unlocked by means of a suitable key introduced into a cylinder-lock in said knob.
  • Figure 1 is a plan view of my lock, showing in horizontal section a portion of the door and door-casing with the keeperplate applied to the latter.
  • Fig. 2 is a vertical section of my lock, showing certain parts in elevation. of the lock, showing certain parts in elevation.
  • Fig. 4c is a side elevation of the lock with one of the escutcheon-plates and part of the frame removed.
  • Figs. 5, 6, and 7 are views of the roll-back or latch operating and controlling mechanism, illustrating different positions of the same.
  • Figs. 8, 9, and 10 are views of detached details of construction. a view of the outer knob detached'and shown partly in section.
  • Fig. 12 is a view of the inner knob detached.
  • Fig. 13 is an end elevation of Fig.
  • Fig. 11 looking from right to left, portions of said figure being broken away.
  • Fig. 14 is an end elevation of Fig. 12 looking from left to right.
  • Fig. 15 is a plan view of Fig. 3 is a horizontal section Fig. 11 is the lock-frame with all of the lock mechanism removed therefrom.
  • the lock-frame comprises side plates 1 2, spaced apart to a sufficient distance and properly connected together.
  • ' 3 is an end or face plate which may provide a connection for said side plates 1 2 at the face of the lock.
  • a latch bolt or head 8 is pivotally mounted at 81 on the frame.
  • the 82 is a latch-slide connected by a pin 83 to the latch bolt or head 8.
  • the pin 83 may be carried by the latch-bolt.
  • the latch-slide 82 may have a slot 84, through which the pin 83 passes, so that the latch-bolt 8 may be pressed back without moving the latch-slidefor example, when the door closes.
  • the latch-slide 82 has bifurcated ends 85 85, which may have hook-like extensions 86 86 to be engaged by roll-backs.
  • a roll-back which is controlled by the knob designed to be placed on the inside of the door and also by a key-controlled mech anismwhich may be carried in the outer knob.
  • the roll-back 9 has two arms extending oppositely from its axial center, whereas the roll-back 10 has but one arm.
  • the purpose of providing only one arm on the roll-back 1O is'to enable said roll-back to be used as a lock or stop and also as a means for retracting the latch-bolt.
  • the operation of the roll-backs and the functions of each will be more fully described farther on.
  • the 11 is a spring which may surround the latchslide 82 between the latch bolt or head and the bridge 6.
  • the function of the spring is to normally throw the latch bolt or head 8 outwardly.
  • the bridge 6 serves as astationary abutment against which one end of the spring 11 may'take its bearing.
  • the escutcheon-plate 12 may be fixedly secured in any convenient way to the frame which carries the latch-operating mechanism.
  • the escutcheonplate 12' may, however, slide to and fro on the cylindrical bearing 41.
  • the knob 14 may carry a cylinder-lock 141.
  • 143 is the knob-shank of the knob 14.
  • 144 is an-annular recess therein and toward the inner end thereof.
  • 151 is a knob-shank for knob 15.
  • 152 is an annular recess therein toward the inner end.
  • each roll-back when in place are located in the recess 42 between the inner ends of the tubular bearings 4 41. That part of each roll-back which lies at the end of each knobshank 143 and 151 is slightly enlarged, so as to fit into the enlarged space between the notches 145 on the knob-shank 143 and the notches 153 on the knob-shank 151.
  • the ends of the roll-back 9 project on opposite sides of the knob-shank 143.
  • the single end of the roll-back 10 projects on one side of the knob-shank 151.
  • a key 17 is a key which may be located in a notch 42 in a part of the frame, said key projecting into the annular groove 144 in the knob-shank 143, so as to prevent the same from becoming accidentally disengaged.
  • a similar key may fit in a recess 43 on the frame to project into the annular groove 152 in the knob-shank 151 and hold it against accidental detachment.
  • a small plate 51 may stand above the keys 17 and be held in place by means of a cotterpin 52, the function of said plate 51 being to hold the keys in place, the said plate resting in recesses 171 in each of the keys 17.
  • 87 is a spring which may be carried by the latch-slide 82, the free end of said spring resting against the end of the roll-back 10 to frictionally hold the same in either of its operative positions hereinafter described.
  • the abutment 88 is an abutment on the latch-slide 82.
  • the abutment 88 has a supporting-shoulder, the function of which will be hereinafter described.
  • the knob-shanks 143 151 are rotatively supported in the tubular bearings 4 41.
  • the spring 87 is so shaped as to yieldingly hold the end of the roll-back 10 in either of its operative positions for example, the position shown in Fig. 4 or the position shown in Fig. 5.
  • the person on the outside of the door can by means of a proper key cause the rotation of the spindle 142.
  • This spindle 142 projects freely through an opening in the roll-back 9, but is in such engagement with the roll-back 10 that when said spindle 142 is rotated it will cause a similar rotation of the roll-back 10.
  • said roll-back 10 may be rotated from the position indicated in Fig. 4to that indicated in Fig. 5, or Vice versa. So. also, by means of said key the roll-back 10 may be moved from the position indicated in Fig. 4 to the position indicated in Fig. 6.
  • the person on theinside of the door may either retract the latch-bolt 8 by turning the knob in one direction or look the same by turning it in the opposite direction.
  • the person on the outside of the door may when the roll-back 10 is in the position shown in Fig. 4 retract the IIO latch-bolt by rotating the outer knob in either and keeper-plate are first applied to a door.
  • the rounded end of the latch-bolt will engage the edge of the keeper at a point intermediate in'the length of the former rather than at its rear edge.
  • the consequence is 'that when the door or the door-casing shrinks, so as to leave a slight space between the edge of the door and the casing, the latch-bolt moves ahead or projects slightly more out of the lock-frame than indicated in Fig. 1, and as a result the eccentric or cam face of the latch-' bolt 8 will engage with the edge of the recess in the keeper-plate when the door is closed, and thus hold it firmly in its closed position against rattling.
  • this lock possesses all of the advantages of any lock and the additional advantages of being able to lock the door on the inside by the use of the same means by which the latch is operated, it being merely necessary to reverse the direction of rotation of the inside knob.
  • latch mechanism comprising a latch bolt or head, an inner and an outer rotatable knob-shank, bolt-actuating means operated thereby to move said bolt, and a locking means operated by the inner knob-shank to lock said bolt against retraction.
  • latch mechanism comprising a latch bolt or head, a plurality of knob-shanks, a bolt-actuating device car ried by each knob-shank whereby by the rotation of either knob-shank the bolt may be operated and mechanism operated by the inner knob-shank and cooperating with the bolt to lock the latter against retraction.
  • a latch mechanism comprising a latch bolt or head, a plurality of rotatable knob-shanks, bolt-actuating means carried by each of said knob-shanks, one of the said means being arranged to retract said latch bolt or head when its shank is rotated 5.
  • latch mechanism comprising a latch bolt or head, a plurality of rotatable knob-shanks, a roll-back carried by one of the said'shanks and engaging said latch mechanism to retract the same if said shank is rotated in either direction, another rollback carried by the outer knob-shank and cooperating with the latch mechanism to retract the latch bolt or head when the last-mentioned shank is rotated in one direction, said roll-back serving to block said latch mechanism against retraction by the other roll-back when said shank is rotated in the opposite direction.
  • latch mechanism comprising a latch bolt or head, aplurality of rotatable knob-shanks, a roll-back carried by one of the said shanks and engaging said latch mechanism to retract the same when said shank is rotated in either direction, a second roll-back carried by the other knob-shank and cooperating with the latch mechanism to retract the latch bolt or head when the lastmentioned shank is rotated in one direction, said second roll-back serving to lock said latch mechanism against retraction by the first-mentioned roll-back, when said shank is rotated in the opposite direction, said second rollback extending on one side only of its supporting-shank.
  • latch mechanism comprising a latch bolt or head, a plurality of rotatable knob-shanks, a roll-back carried by one of the said shanks and engaging said latch mechanism to retract the same if said shank is rotated in either direction, a second roll-back carried by the other knob-shank and cooperating with the latch mechanism to retract the latch bolt or head when the last-mentioned shank is rotated in one direction, said roll-back servingto block said latch mechanism against retraction when said shank is rotated in the opposite direction, the last-mentioned roll-back extending on one side only of its supporting-shank, and an abutment on the latch mechanism to act as a stop for said locking roll-back when the latter is in its locking position.
  • latch mechanism comprising a latch bolt or head, a plurality of rotatable knob-shanks, bolt-actuating means carried by the outer knob-shank arranged to operate said latch mechanism when said outer knob-shank is rotated in either direction, means carried by the inner knobshank to retract the latch mechanism when said knob-shank is rotated in one direction, said means cooperating with the latch mechanism to lock the outer knob-shank against rotation when said knob-shank is turned in the opposite direction, and separate means on the same side of the door as the locked knobshank to unlock said parts.
  • latch mechanism comprising a latch bolt or head, a plurality of rotatable knob shanks, bolt actuating means carried by the outer knob-shank arranged to operate said latch mechanism When said outer knob-shank is rotated in either direction, means carried by the inner knobshank to retract the latch mechanism When said knob-shank is rotated in one direction, and to cooperate With the latch mechanism to lock the outer knob-shank when said knobshank is turned in the opposite direction and key-controlled means on the same side of the door as the locked knob-shank to operate the inner knob-shank to release and retract the latch mechanism.
  • latch mechanism comprising an outer knob -shank and means coacting therewith to operate said latch mechanism

Description

PATENTED SEPT. 1 3
B. PHELPS.
LOOK.
'APPLIGATION FILED DBO. 4, 1903.
3 SHEETS-SHEET 1.
N0 MODEL.
4 11km oes- PATENTED SEPT. 13, 1904.
B. PHELPS.
LOCK.
APPLICATION FILED DEC. 4, 1903.
3 SHEETS-SHEET 2.
N0 MODEL.
PATENTED SEPT. 13
B. PHELPS.
LOOK.
APPLICATION FILED DEO; 4, 1903.
3 SHEETSSHBET 3.
N0 MODEL.
IN I Hill mmunummmm IHI Patented September 13, 1904.
PATENT Trice.
BYRON PHELPS, OF SEATTLE, WASHINGTON.
LOCK.
SPECIFICATION forming part of Letters Patent No. 762,769, dated September 13, 1904-.
Application filed December 4, 1903. Serial No. 183,819. (No model.)
My invention has particular utility in connection with such looks as are used for bathroom or bed-room doors.
The said lock may be operated by either knob, or the inside knob may be employed without the use of any separate instrumentality for the purpose of throwing a locking device into such position that the outer knob is held against rotation.
I also provide means whereby although the outer knob is locked against rotation the same may be unlocked by means of a suitable key introduced into a cylinder-lock in said knob.
In the drawings,Figure 1 isa plan view of my lock, showing in horizontal section a portion of the door and door-casing with the keeperplate applied to the latter. Fig. 2 is a vertical section of my lock, showing certain parts in elevation. of the lock, showing certain parts in elevation. Fig. 4c is a side elevation of the lock with one of the escutcheon-plates and part of the frame removed. Figs. 5, 6, and 7 are views of the roll-back or latch operating and controlling mechanism, illustrating different positions of the same. Figs. 8, 9, and 10 are views of detached details of construction. a view of the outer knob detached'and shown partly in section. Fig. 12 is a view of the inner knob detached. Fig. 13 is an end elevation of Fig. 11 looking from right to left, portions of said figure being broken away. Fig. 14 is an end elevation of Fig. 12 looking from left to right. Fig. 15 is a plan view of Fig. 3 is a horizontal section Fig. 11 is the lock-frame with all of the lock mechanism removed therefrom.
I will proceed to describe the particular form of my invention shown in the accompanying drawings.
The lock-frame comprises side plates 1 2, spaced apart to a sufficient distance and properly connected together.
' 3 is an end or face plate which may provide a connection for said side plates 1 2 at the face of the lock.
4 11 are tubular bearings in which the knobshanks are revolubly mounted.
5 is a bridge connecting the inner end of the frame-plates 1 2.
6 is a second bridge, which may connect said side plates 1 2 at a point approximately midway in their length.
42 is a space between the ends of the tubular bearings 4 41 and in which space the rollbacks are located.
A latch bolt or head 8 is pivotally mounted at 81 on the frame.
82 is a latch-slide connected by a pin 83 to the latch bolt or head 8. The pin 83 may be carried by the latch-bolt. The latch-slide 82 may have a slot 84, through which the pin 83 passes, so that the latch-bolt 8 may be pressed back without moving the latch-slidefor example, when the door closes. The latch-slide 82 has bifurcated ends 85 85, which may have hook-like extensions 86 86 to be engaged by roll-backs.
9 is a roll-back controlled by the knob designed for the outside of the door..
10 is a roll-back which is controlled by the knob designed to be placed on the inside of the door and also by a key-controlled mech anismwhich may be carried in the outer knob.
It will be noticed that the roll-back 9 has two arms extending oppositely from its axial center, whereas the roll-back 10 has but one arm. The purpose of providing only one arm on the roll-back 1O is'to enable said roll-back to be used as a lock or stop and also as a means for retracting the latch-bolt. The operation of the roll-backs and the functions of each will be more fully described farther on.
11 is a spring which may surround the latchslide 82 between the latch bolt or head and the bridge 6. The function of the spring is to normally throw the latch bolt or head 8 outwardly. The bridge 6 serves as astationary abutment against which one end of the spring 11 may'take its bearing.
12 13 are escutcheon-plates. The escutcheon-plate 12 may be fixedly secured in any convenient way to the frame which carries the latch-operating mechanism. The escutcheonplate 12'may, however, slide to and fro on the cylindrical bearing 41.
14 is the outside knob.
15 is the inside knob.
The knob 14 may carry a cylinder-lock 141.
142 is a spindle operated by the key designed to fit the lock 141.
143 is the knob-shank of the knob 14. 144 is an-annular recess therein and toward the inner end thereof.
151 is a knob-shank for knob 15. 152 is an annular recess therein toward the inner end.
145 represents notches in the end of the knob-shank 143, (see Fig. 13,)and 153 represents notches in the end of the knob-shank 151. These notches 145 and 153 are designed to receive the roll-backs 9 10, respectively.
The roll-backs when in place are located in the recess 42 between the inner ends of the tubular bearings 4 41. That part of each roll-back which lies at the end of each knobshank 143 and 151 is slightly enlarged, so as to fit into the enlarged space between the notches 145 on the knob-shank 143 and the notches 153 on the knob-shank 151. The ends of the roll-back 9 project on opposite sides of the knob-shank 143. The single end of the roll-back 10 projects on one side of the knob-shank 151.
17 is a key which may be located in a notch 42 in a part of the frame, said key projecting into the annular groove 144 in the knob-shank 143, so as to prevent the same from becoming accidentally disengaged. A similar key may fit in a recess 43 on the frame to project into the annular groove 152 in the knob-shank 151 and hold it against accidental detachment. A small plate 51 may stand above the keys 17 and be held in place by means of a cotterpin 52, the function of said plate 51 being to hold the keys in place, the said plate resting in recesses 171 in each of the keys 17.
87 is a spring which may be carried by the latch-slide 82, the free end of said spring resting against the end of the roll-back 10 to frictionally hold the same in either of its operative positions hereinafter described.
88 is an abutment on the latch-slide 82. The abutment 88 has a supporting-shoulder, the function of which will be hereinafter described.
The knob-shanks 143 151 are rotatively supported in the tubular bearings 4 41.
8. (See, for example, the position of the rollback in Fig. 7.) The person on the inside of the door may by turning the knob 15 in the right-hand direction cause the retraction of the latch bolt or head 8 through the medium of the end of the roll-back 10 and the latchslide 82. (See the position of the roll-back 10 in Fig. 6.) Should, however, the person on the inside of the door turn the handle 15 to the left, he will cause the single-ended roll-back 10 to rotate from the position indicated in Fig. 4 to the position indicated in Fig. 5, in which the said roll-back rests upon the supporting-shoulder of the abutment 88, while said abutment also stands in front of said roll-back. When in this position, the roll-back serves to block the retraction of the latch-slide 82. Hence the outer knob cannot be rotated, but is practically locked.
The spring 87 is so shaped as to yieldingly hold the end of the roll-back 10 in either of its operative positions for example, the position shown in Fig. 4 or the position shown in Fig. 5. The person on the outside of the door can by means of a proper key cause the rotation of the spindle 142. This spindle 142 projects freely through an opening in the roll-back 9, but is in such engagement with the roll-back 10 that when said spindle 142 is rotated it will cause a similar rotation of the roll-back 10. By this means said roll-back 10 may be rotated from the position indicated in Fig. 4to that indicated in Fig. 5, or Vice versa. So. also, by means of said key the roll-back 10 may be moved from the position indicated in Fig. 4 to the position indicated in Fig. 6.
From the foregoing it will be seen that the person on theinside of the door may either retract the latch-bolt 8 by turning the knob in one direction or look the same by turning it in the opposite direction. The person on the outside of the door may when the roll-back 10 is in the position shown in Fig. 4 retract the IIO latch-bolt by rotating the outer knob in either and keeper-plate are first applied to a door.
the rounded end of the latch-bolt will engage the edge of the keeper at a point intermediate in'the length of the former rather than at its rear edge. The consequence is 'that when the door or the door-casing shrinks, so as to leave a slight space between the edge of the door and the casing, the latch-bolt moves ahead or projects slightly more out of the lock-frame than indicated in Fig. 1, and as a result the eccentric or cam face of the latch-' bolt 8 will engage with the edge of the recess in the keeper-plate when the door is closed, and thus hold it firmly in its closed position against rattling. It is obvious that were the rounded face of the latch-bolt 8 concentric with the pivoted point 81 this action would not take place, and the shrinkageof the door or the door-casing would result in a looseness between the latch bolt and the keeper plate which would permit of the rattling of the door.
Obviously this lock possesses all of the advantages of any lock and the additional advantages of being able to lock the door on the inside by the use of the same means by which the latch is operated, it being merely necessary to reverse the direction of rotation of the inside knob.
What I claim is 1. In a lock in combination, latch mechanism comprising a latch bolt or head, an inner and an outer rotatable knob-shank, bolt-actuating means operated thereby to move said bolt, and a locking means operated by the inner knob-shank to lock said bolt against retraction.
2. In a lock in combination, latch mechanism comprising a latch bolt or head, a plurality of knob-shanks, a bolt-actuating device car ried by each knob-shank whereby by the rotation of either knob-shank the bolt may be operated and mechanism operated by the inner knob-shank and cooperating with the bolt to lock the latter against retraction.
3. In alock in combination, a latch mechanism comprisinga latch bolt or head, a plurality of rotatable knob-shanks, bolt-actuating means carried by each of said knob-shanks, one of the said means being arranged to retract said latch bolt or head when its shank is rotated 5. In a lock in combination, latch mechanism comprising a latch bolt or head, a plurality of rotatable knob-shanks, a roll-back carried by one of the said'shanks and engaging said latch mechanism to retract the same if said shank is rotated in either direction, another rollback carried by the outer knob-shank and cooperating with the latch mechanism to retract the latch bolt or head when the last-mentioned shank is rotated in one direction, said roll-back serving to block said latch mechanism against retraction by the other roll-back when said shank is rotated in the opposite direction.
6. In a lock in combination, latch mechanism comprising a latch bolt or head, aplurality of rotatable knob-shanks, a roll-back carried by one of the said shanks and engaging said latch mechanism to retract the same when said shank is rotated in either direction, a second roll-back carried by the other knob-shank and cooperating with the latch mechanism to retract the latch bolt or head when the lastmentioned shank is rotated in one direction, said second roll-back serving to lock said latch mechanism against retraction by the first-mentioned roll-back, when said shank is rotated in the opposite direction, said second rollback extending on one side only of its supporting-shank.
7 In a lock in combination, latch mechanism comprisinga latch bolt or head, a plurality of rotatable knob-shanks, a roll-back carried by one of the said shanks and engaging said latch mechanism to retract the same if said shank is rotated in either direction, a second roll-back carried by the other knob-shank and cooperating with the latch mechanism to retract the latch bolt or head when the last-mentioned shank is rotated in one direction, said roll-back servingto block said latch mechanism against retraction when said shank is rotated in the opposite direction, the last-mentioned roll-back extending on one side only of its supporting-shank, and an abutment on the latch mechanism to act as a stop for said locking roll-back when the latter is in its locking position.
8. In a lock in combination, latch mechanism comprisinga latch bolt or head, a plurality of rotatable knob-shanks, bolt-actuating means carried by the outer knob-shank arranged to operate said latch mechanism when said outer knob-shank is rotated in either direction, means carried by the inner knobshank to retract the latch mechanism when said knob-shank is rotated in one direction, said means cooperating with the latch mechanism to lock the outer knob-shank against rotation when said knob-shank is turned in the opposite direction, and separate means on the same side of the door as the locked knobshank to unlock said parts.
9. In a lock in combination, latch mechanism comprising a latch bolt or head, a plurality of rotatable knob shanks, bolt actuating means carried by the outer knob-shank arranged to operate said latch mechanism When said outer knob-shank is rotated in either direction, means carried by the inner knobshank to retract the latch mechanism When said knob-shank is rotated in one direction, and to cooperate With the latch mechanism to lock the outer knob-shank when said knobshank is turned in the opposite direction and key-controlled means on the same side of the door as the locked knob-shank to operate the inner knob-shank to release and retract the latch mechanism.
10. In a lock in combination, latch mechanism comprising an outer knob -shank and means coacting therewith to operate said latch mechanism When said knob-shank is turned in either direction, an inner knob-shank and means carried thereby to either operate said latch mechanism or lock the same against operation by the first-mentioned knob-sh ank and supplemental key-controlled means accessible from the same side of the look as the locked knob-shank and cooperating With the inner knob-shank whereby the latter maybe turned in either direction.
Signed at New York, N. Y., this 3d day of December, 1903.
BYRON PHELPS. Witnesses:
R. C. MITCHELL, L. VREELAND.
US1903183819 1903-12-04 1903-12-04 Lock. Expired - Lifetime US769769A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593264A (en) * 1948-12-30 1952-04-15 Hollymade Hardware Mfg Company Doorknob spindle releasing means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593264A (en) * 1948-12-30 1952-04-15 Hollymade Hardware Mfg Company Doorknob spindle releasing means

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