US1435874A

US1435874A - Lock

Info

Publication number: US1435874A
Authority: US
Inventors: Charles A Prescott
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-01-14
Filing date: 1922-01-14
Publication date: 1922-11-14
Anticipated expiration: 1939-11-14

Description

-c. A msmw.

LUCK.

APPLICATION FILED um. 14, 1922.

iL 'fi wa mama NW 1141, 11922.

2 SHEETS-SUEZ"! l.

A TTOR/l/EYS c. A. PRESCOTT. Lock; APPLICATION FILEE? IAN-14. I922.

Pmmedl NW, M, 922;

2 SHEETSSHEET 2 WITNESSES llii Lid

, w ten LOCK.

Application filed January 14:,

To all whom it may concern Be it known that T, CHAnr-ns A. Pnnsco'rr, a subject of the King of England, and a resident of Victoria, in the Province of British Columbia, Dominion of Canada, have invented a new and Tmproved Look, of which the following is a full. clear, and oract description.

This invention relates to improvements in loclrs, particularly to a lock of the general character disclosed in Letters Patent of the United States Number 1,123,00, granted to me on December 29, 1914-.

An object of the invention is to provide a look operating along the principles disclosed in this previous patent, and yet a loci: which will be far simpler in construction, less unlikely to get out of order, durable and eilicient in use easy to install and inexpensive to manufacture.

The invention resides particularly in a novel form of lock casing, a novel means for actuating the latch, and in certain other novel features of construction and combina tions and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings- Figure 1 is a view in section through my improved lock;

Figure 2 is a sectional view on the line 2-2 of Figure 1;

Figure 3 is a view in transverse section on the line 33 of Figure 1;

Figure 4. is a similar View on the line 44 of Figure 1;

Figure 5 is another sectional detail view on the line 5-5 of Figure 1;

Figure 6 is a perspective view of the lockmember 37 Figure 7 is aview similar to Figure 1 illustrating av modified form of lock; and

Figure 8 is a perspective view showing the parts of the latch actuating mechanism in disassembled relationship.

Referring in detail to Figures 1 to 6 inclusive of the drawings. T have used the reference numeral 1 to designate a closure, such as a door, and the reference numeral 2 to indicate the closure frame. The door 1 is provided with a transverse opening or bore 3 extending entirely therethrough adjacent the free edge thereof and a short opening or passage 42 extending from the passage 3 to the face of the free edge of the door. Plates are attached. to opposite sides of the door 1922. Serial No. 529,172.

by any suitable securing devices such as 6 and have openings therein registering with the ends of the passage Sleeves and 8 extending into and jcurnaled in the ends of the passage 3 are rigidly attached to door knobs 9 and 10 respectively. These sleeves are of angular internal bore and a. shank 11 of angular cross section fits within and connects the sleeves.

The invention in this case resides partially in the novel construction of the look casing which I have designated by the reference numeral 12. This casing is tubular including an inner end square in cross section. as inlica-ted at 13, an outer end which is sub stantially circular in cross section. as indicated at- 14, and a shoulder 15 at the unction of the square and rounded ends of the casing. The squared end of the casing provided with a pair of oppositely disposed keyhole slots 16 through which the shank 11 passes, the slots being suiiiciently large to ordinarily permit turning of the shank.

A plate 17 fixed to the outer surface of the free edge of the door 1 is formed with an opening registering with the passage 4 and es an integral bushing 18 projecting includ into the end of this passage and serving to retain the lock casing 12 in place, said bushing entering the open outer end 0'' b casing. The bushing 18 is tormee. square passageway therethrough adapted to guide the sliding movement of a latch 19. This latch is movable through the bushing and into a receiving pocket or keeper 20 in the face of the adjacent frame 2. striking plate 21 secured to the frame is provided with an opening therein exposing the pocket and is formed with a flanged surface 22 which is engaged by the beveled end 23 of the latch as the door is swung to, to iacilitate the operation of the latch and cushion the closing of the door. Tt will be noted that the latch 19 is provided with a groove 24 in its lower face. This groove effectively prevents forcing of the latch by the use of a wire or other tool since when a wire is forced under the latch and toward. the free end thereof it will engage in the groove.

A disk 25 fixed to the inner end of the latch is engageable with the bushing 18 to limit the outward movement or projection of the latch. Rigid arms 26 anchored in the disk 25 extend inwardly into the lock casing 12. These arms include shoulders 2? midway of their length and at their inner ends terminate in integral hooks 28 engageable with the shank 11, for a purpose described hereafter. A disk 29 is mounted to slide on the arms 26 between the disk and the shoulders 27. A relatively weak coiled spring 30 interposed between the disks 25 and 29 serve to normally maintain the disk 29 pressed against the shoulders 27 of the arms 26. Another coiled spring 31 is interposed between the shoulder 15 of the lock casing and the other side of the disk 29, this last mentioned, spring tending to normally effect projection of the bolt through the medium of the disk 29 and the other spring 30.

A ring 32 is immovable upon the shank 11 and a link 33 pivoted to the ring 32 is also connected to the disk 29, said link extending through the spring 15 and said disk having openings therein'permitting the link to slide therethrough, but being positively engaged by the end of the link to effect retraction of the latch 19 when the shank 11 is turned, as will be readily understood.

It will be apparent from the foregoing description that turning of the shank 11 will effect retraction or projection of the latch 19. It will also be evident that some means must be provided for locking the latch in extended or projected position, and with this end in view, a spindle 3a is journaled within the shank and held against longitudinal movement by a flange 35 engageable with one end of the shank. That end of the spindle which. carries the flange and which is located outside of the shank 11 is'formed with a spiral thread or web 36. A locking member 37 is slidable longitudinally in a keyway 38 in the sleeve 7. This locking member includes a pair of fingers 39 straddling the spiral web 36, whereby turning of the spindle operates through the medium of the web to move the locking member 37 longitudinally. As the locking member is moved longitudinally its inner end 40 will be projected into one of the key-hole slots 16 where its presenoe will. prevent turning of the shank 11., or movement of the hooks 28 should an unauthorized forcing of the bolt be attempted.

The sleeve 8 and the knob 10 are rigidly connected together and a barrel 41 is mounted in theknob and extends into-the'sleeve. This barrel is formed with a plurality of internal projections 1-2 adapted to prevent the insertion within the barrel of any key save the proper one which is indicated at d3, as having relatively deep recesses 4: 1 therein, which permit the key upon rotation. to pass the lugs. The key 13 is engageable in pockets 15 in the end of the spindle 3 1 to effect turning of the same and flat springs 46 interposed between reduced flattened portion 47 of the spindle and the angular internal walls of the shank 11 prevent accidental turning of the spindle. A barrel 4:1. is

1 ,asasra also provided in the knob '9, but this barrel is not equipped with the projections 12.

Assuming the latch to be in unlocked position, as seen most clearly in Figure 1, it

is merely necessary to insert the key 43 into the barrel 1].. Turning of the key will effect turning of the spindle 34 which will operate through the medium of the web 35 to project the locking member 37 into the slot 16, thereby locking the shank 11 against movement, as hereinbefore suggested. It will then be impossible to turn the shank and effect withdrawal of the latch without first using the key to again turn the spindle and release the locking member 37 When this locking member, however, has been released, turning of either the knob 9 or the knob 10 will turn the shank, operating through the medium of the ring 32, link 33, disk 29 and arms 26 to positively retract the latch from its keeper against the action of the springs 31 and 30. The lock can of course be operated with equal facility through the barrel 41'.

Referring in detail now to Figures 7 and 8 of the drawings, it will be seen that I have illustrated a slight modification, wherein T have substituted for the shank 11, a shank which includes a pair of

sections

48 and 49. A disk 50 performing the same function as the ring 32 is secured to each section of the shank. These disks are coupled through the medium of independent links 51 to a disk 52 having openings therein receiving the interminate portions of the links and permitting sliding movement of the disks upon one link when the other link is pulled. WVith' this form of the device a locking member 53 performing the same function as the locking member 37 is provided in the same sleeve which carries the barrel 54. This locking member is in like manner operated by a spiral web 55 fixed to the spindle 56. /Vith I this form of the device, the split sleeve and the link connections 51 make it possible to operate the latch with either knob independently of the other knob. In other words, the door may be locked from the outside and at the same time may be conveniently opened from the inside, since turning of one shank does not effect or cause'turning of the other. The remainder of the construction of the latch 57, springs 58 and 59, etc. are substan tially the same as in the preferred. form hereinbefore described, and the lock operates in exactlythe same manner. This second form of the device is especially suitable for doors in hotels, public buildings, office buildings, etc., where it is desired to make the lock inaccessible from the outside but alwaysv open on the inside of a door, while the first described lock will be convenient in all places where the usual mortise locks are used.

Although I have illustrated one of the preferred embodiments of my-invention, it

will be obvious that various slight changes and alterations might be made in the general form and arrangement of the parts described without departing from the inven tion, and hence I do not wish to limit myself to the precise details set forth, but shall consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. In a look, a hollow knob shank including an angular internal bore, a spindle turning in the shank, a spring held latch oper able upon turning of the shank, means operable upon turning the spindle to lock said shank against turning, and means interposed between the spindle and the flat interior faces of the shank to prevent accidental turning of the spindle.

2. In a look, a hollow knob shank including an angular internal bore, a spindle turning in the shank, a spring held latch operable upon turning of the shank, means operable upon turning the spindle to lock said shank against turning, and means interposed between the spindle and the fiat interior faces of the shank to prevent accidental turning of the spindle, said means comprising fiat springs, said spindle including a flattened reduced portion providing a seat for said springs.

3. In a look, a tubular lock casing including a squared inner end and cylindrical outer end, an internal shoulder in the casing at the junction of the squared and cylindrical portions thereof, a latch movable in the outer end of the casing, a disk associated with said latch, and a coiled spring interposed between the disk and shoulder tending to project said latch.

4. In a look, a tubular lock casing including a squared inner end and cylindrical outer end, an internal shoulder in the easing at the junction of the squared and cylindrical portions thereof, a latch movable in the outer end of the casing, a disk associated with said latch, a coiled spring interposed between the disk and shoulder tending to project said latch, said casing having registering openings through its inner end, an angular knob shank extending through and turnable in said openings, arms connected to the latch and engageable with the shank to limit the projection of said latch, said disk having limited sliding movement on the arms, and a relatively weak coiled spring interposed below said disk and latch to cushion the projection of said latch.

5. In a lock, a tubular lock casing including a squared inner end and cylindrical outer end, an internal shoulder in the casing at the junction of the squared and cylindrical portions thereof, a latch movable in the outer end of the casing, a dis-k associated with said latch, a coiled spring interposed between the disk and shoulder tending to project said latch, said casing having registering openings through its inner end, an angular knob shank extending through and turnable in said openings, arms connected to the latch and engageable with the shank to limit the projection of said latch, said disk having limited sliding movement on the arms, a relatively weak coiled spring interposed below said disk and latch to cushion the projection of said latch, and means whereby turning of the shank retracts the latch against the action of the springs.

6. In a look, a tubular lock casing includ ing a squared inner end and cylindrical outer end, an internal shoulder in the casing at the junction of the squared and cylindrical portions thereof, a latch movable in the outer end of the casing, a disk associated with said latch, a coiled spring interposed between the disk and shoulder tending to project said latch, said casing having registerinp' openings through its inner end, an anguIar knob shank extending through and turnable in said openings, arms connected to the latch and engageable with the shank to limit the projection of said latch, said disk having limited sliding movement on the arms, a relatively weak coiled spring interposed below said disk and latch to cushion the projection of said latch, and means whereby turning of the shank retracts the latch against the action of the springs, said means including a link connecting the disk and shank and wherein said disk has limited sliding movement.

7. In a look, a spring held latch, a knob shank including two sections, a spindle mounted to turn in the shank, means whereby turning of either section effects retraction of the latch, and means operable upon turning of the spindle to lock one shank section against turning.

- CHARLES A. PRESCUTI.