US2046611A

US2046611A - Door latch mechanism

Info

Publication number: US2046611A
Application number: US645847A
Authority: US
Inventors: William C Devereaux
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-12-05
Filing date: 1932-12-05
Publication date: 1936-07-07
Anticipated expiration: 1953-07-07

Description

July 7, 1936. w. c. DEVEREAUX DOOR LATCH MECHANISM Filed Dec. 5, 1932 2 Sheets-Sheet l W. C. DEVEREAUX DOOR LATCH MECHANISM Filed Dec. 5, 1932 2 Sheets-Sheet 2 Patented July 7, 1936 'UNETED STATES PATENT OFFICE 2,046,611 noon LATCH MECHANISM William C. Devereaux, Detroit, Mich.

Application December 5, 1932, Serial No. 645,847

13 Claims. (01. 292-169) This invention relates generally to door latch mechanism, especially vehicle door latch mechanism, and consists of certain novel features of construction, combinations and arrangements of 5 parts, thatiwill be hereinafter more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a fragmentary vertical sectional view of a door with latch mechanism embodying my invention applied thereto;

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

Figure 3 is a sectional view taken on the line 3-,-3 of Figure 2;

Figure 3A is a detail view of the rollback;

Figure 4 is a front elevation of the door latch mechanism;

Figure 4A is a detail view of the spring washer;

Figure 5 is a side elevation of a slightly modified latch construction;

Figure 6 is a top plan view of the construction illustrated in Figure 5;

Figure '7 is a. front elevation of the construction illustrated in Figure 5;.

Figure 8 is a detail view of the inside handle stem illustrated in Figures 5 to 7, inclusive;

Figure 9 is an end elevation of the stem illustrated in Figure 8;

Figure 10 is a detail view of the rivet illustrated in Figure 6;

Figure 11 is a detail view of the inside rollback illustrated in Figure 5;

Figure 12 is a detail view of the spring washer used in the modification;

Figure 13 is a detail view of the rollback used in the modification;

Figure 14 is a plan view of the spring;

Figure 15 is a side elevation thereof.

Figure 16 is a fragmentary horizontal sectionalview through the handle assembly with parts broken away and in section.

Referring now to the drawings, A is a vehicle door; B is a vertically movable glass panel in said door, and C is a runway for said glass panel. D is a latch case plate having portions I and 2 respectively secured to opposite sides of the door and having an intermediate transversely extending portion 3 at the forward edges of said portions secured to the free edge of the door. E is a latch bolt extending through an opening in thetransversely extending portion 3 for engagement with a suitable keeper (not shown) and having a shank 4 slidably mounted on the inner portion I of the case plate, and F is a spring anchored on the intaken on ner portion I of the case plate and having an arm 5 engaging a lateral flangeB of the shank and normally holding the bolt E in projected position, G is a cover plate arranged in spaced relation to the outer portion 2 of the case plate and rigidly 5 secured thereto; H is a handle operable from the outer side of the door and having a stem 1 of substantially square cross section disposed substantially parallel to the transversely extending portion 3 of the case plate and received in aligned 10" openings in the outer portion 2 of the case plate and cover plate G, and I is a rollback on the stem 1 between the cover plate G and outer portion 2 and having an upstanding arm I0. Preferably this rollback I is provided at diametrically oppo- 15 site points thereof with notches II and I2 that receive lateral lugs I3 and I 4 respectively of a spring washer J on the stem 1 corresponding to that set forth in my application filed October 10, 1932 and bearing Serial Number 637,175.

In the present instance, the rollback I upon the outer portion 2 of the case plate effects a retraction of the bolt E upon the inner portion l of the case plate by means of an intermediate yoke or actuator K which straddles the runway C for the glass panel B. As shown, the base I5 of this yoke is movable vertically in a suitable opening IS in the transversely extending portion 3 of the case plate while the sides I! and I8, respectively, thereof are pivoted upon suitable studs or rivets I9 and 20, respectively, extending transversely of the inner and outer portions I and 2 of the case plate. The outer side I8 has a depending arm 2| in rear of and adapted to be engaged by the arm ll] of the rollback, while the inner side I! has a depending arm 22 in advance of and adapted to engage a lateral flange 23 of the bolt shank. Thus by operating the outside handle H to turn the rollback I clockwise against the arm 2| of the yoke, the latter will swing downwardly about the rivets I9 and 20 so that the arm 22 will be moved anti-clockwise against the flange 23 of the bolt shank. As a result the latch bolt E will be retracted against the tension of the spring F.

For dogging or rendering the outside rollback I inoperative I have provided a rollback M which is pivoted upon the inner portion lot the case plate and has a downwardly extending arm 24 engageable with a recess 25 in the inner side ll of the yoke. As shown, this rollback M has a hub 26 mounted to turn in aligned openings in the inner portion I of the case plate and in a suitable cover plate 0 upon said inner portion and is adapted to be turned by a laterally projecting stem R and handle T upon the inner'side of the door. Preferably this arm 24 of the rollback is in advance of and is engageable with a lateral flange 29 of the bolt shank toeffect the retraction of the bolt. A second arm 30 extends downwardly from the rollback M so as to be in the path of the lateral flange 29 of the bolt shank when the arm 24 is in dogging engagement with the yoke. I Thus by turning the inside rollback M clockwise the arm 24 thereof will be engaged with. the recess 25 and will cause the yoke D and outside rollback I to be dogged. Any suitable means such as the spring X carried by the cover plate 0 may be used to detachably hold the rollback Min such dogging position. By turning the inside rollback M anti-clockwise the arm 24 will engage the lateral flange 29 of the bolt shank and will cause the bolt E to be retracted against thetension of the spring F. Normally the arm 24 is held bythe spring X in engagement with the lateral flange 29 of the bolt shank. However, should the arm 24 bein the dogged positionpi. e., in the recess :25 in the yoke when thdooris open, the lateral flange 29 of the bolt shank'will engage and swing the arm 30 of the rollback in an anti-clockwise direction when the door' is "subsequently'fclosed or slammed shut. As a result thegarm '24 will be moved out of the recess .25 in the: yoke andthe latter may then be moved by the outside handle to effect a retraction of the-bolt. 'Ihus this'fea ture prevents the possibility of the driver being locked outside the'car if the rollback M isnot in normal positionwhen the door is movedfrom openitoclosed position. a a In Figures 5 to 15 inclusive; Iihave illustrateda slight modification wherein 40 is a latch'case plate secured uponthe inner side of the door and provided at its forward edge with-a lateral flange 41 that is secured to the forward edge'of the door. 42 is a latch boltextending through 'an opening 7 in the lateral flange 4| forengagement witha suitablekeeper (not shown) and having a rearwardly extending shank 43 flxed thereto anddisposed substantially parallel to the-case plate. and 44 is a spring anchored on thecase plate and hav-v ing-an' arm '45 between the case plate and shank 43 engaging the :rear end of the bolt and normally holding thesame in projected position. 46 is a cover plate parallel and secured to the case plate 41 is a handle operable from the outer'side of the door and having a stem 48 of substantially square cross section disposed substantially par allel "to the lateraliflange. 4! and received in aligned openings inane case plate '41] and cover plate 41b, and 49 is a rollback sleeved on the stem 48 between the

plates

40 and 45 and having an upstanding arm 50 engageable with "a lateral flange 5! of the: bolt shank to efiect a retraction of the bolt. Any suitable means such as the lugs 52 struck out from the case plate 45 may be used as abutments for thexrollback'arm '50 to limit the forward swingingmovement thereof, while any suitablemeans such as the spring washer 53 sleevedon the :stem 48 and having diametrically opposed struck-out lugs 54 and 55 respectively engaging diametrically opposed notches 56 and 51 respectively in the rollback may be employed to take up play between the stem '48 and rollback 49.

and maintain the parts in proper assembled relation.

58 is'a handle operable from the inner side of a door and having a stem-59 journaled in the case plate 40; 60 is arivet'hav'ing a head 6| upon the innerside of the bolt shank 43, having a circular portion =fi2 within an elongated slot 63 in the shank 43, and having a spirally knurled shank 64 engaging an axial socket 65in the inner end of the stem 59. 66 is a rollback non-rotatably sleeved on the stem 59 between the shank 43 and case plate 40 and having an upstanding arm 61 provided with a rounded portion 68 for engagement with a lateral flange 69 of the shank 43for efiecting a retraction of the bolt, provided with a r shoulder 10 for engagement with a rearwardly extending arm H of the outside rollback to dog the latter andrender the outside handle 4'! inoperative, and having an offset end portion 12 engageable by the lateral flange 5| of the shank applied directly upon the outer end of the bolt 42 as when the door is moved to closed position or is when the latter is moved rearwardly by pressure blown or slammed shut. Thus with this coni struction the rivet 69 forms a guide for the bolt shank 43 and cooperates with said shank to hold the handle stem 59 in proper assembled position in the case plate and to hold the rollback 66 in proper assembled position upon said stem. 4 i In use, thebolt42 may be retracted againstthe tension of the spring 44 by moving the outside rollback 49 clockwise :against the flange 51, or 5 by moving 'the inside rollback B6] clockwise against the lateral flange 69. When the bolt 42 is in projected position and the outside. rollback arm 50 is in engagementwith the lugs 52, the inside rollback'fi'li may be turned anticlockwise so that the shoulder 10' may engage the arm ll of the outside rollback. The outside rollback will then be dogged and rendered inoperative. suitable means such as the spring leaf or washer on the stem 59 between the case plate 45 and the rollback 66 may be'used to detachably hold the said rollback in this dogged position. The outside rollback 49 may be readily released by moving the inside rollback B6 clockwise to disengage the'shoulder 10 from the arm H. Nor n ally the arm Glis held by the spring in engagement with the lateral flange 69' of the bolt shank. However, should the outside rollback'49 be dogged by the shoulder 7100f the inside rollback when the door isfope'n, thelateral flange 5! of the bolt shank will engage and swing theoffset end portion 12 'of the'arm 61 in an anticlockwise direction when the door is subsequently closed or slammed shut. As .a result the shoulder 10 of the inside rollback 65 will be disengaged from the'arm H of the outside rollback and the latter may then be rnoved by the outside handle 41 to eflect a retraction of the bolt. Thus this feature prevents the possibility of the driver theportions aforesaid of the shank to release the,

first mentionedrollbackr v2; In a door latch mechanism, a latch bolt having two lateral projections, means engageable with one of said projections for retracting the bolt, and means engageable withthe second projection to effectza-retraction of the :bolt, said'last mentioned means being engageable with the first mentioned'means to dog the same, and operable by the second projection on the bolt to efiect a release of said first mentioned means.

3. In a door latch, a case plate, a latch bolt having a shank movable over said case plate, a handle stem journaled in the case plate beside and terminating short of said shank, a rollback non-rotatably sleeved on the stem between the case plate and shank and engageable with a portion of the latter to effect a retraction of the bolt, and means holding the stem in the case plate so that the rollback will be retained on the stem, including means forming a guide for the bolt shank.

4. In a door latch, a case plate, a latch bolt having a shank movable over said case plate, a handle stem extending through the case plate toward but terminating short of said shank, a roll back non-rotatably sleeved on the stem between the case plate and shank and engageable with a portion of the latter to efiect a retraction of the bolt, and means holding the handle stem in the case plate so that the roll back will be retained on the said stem, including means extending through the bolt shank.

5. In a door latch, a case plate, a latch bolt having a shank movable over said case plate, a handle stem extending through the case plate toward but terminating short of said shank, a roll back non-rotatably sleeved on the handle stem and engageable with the shank to efiect a retraction of the bolt, and means maintaining the handle stem and roll back in assembled relation relative to the case plate and shank, including an element extending through the shank and secured to said handle stem.

6. In a door latch, a case plate, a latch bolt having a shank movable over said case plate, a handle stem extending through the case plate to- Ward but terminating short of said shank, a roll back non-rotatably sleeved on the handle stem and engageable with the shank to effect a retraction of the bolt, and means holding the handle stem and roll back in assembled relation relative to the case plate and bolt shank including 4 means forming a guide for the bolt shank.

7. In a door latch, a latch bolt having a shank, a roll back engageable with one portion of the shank to move the bolt, and a second roll back engageable with another portion of the shank to move the bolt, engageable with the first mentioned roll back to dog the same, and actuable by the first mentioned portion of the shank to release the first mentioned roll back.

8. In a door latch, a latch bolt having a shank, a roll back engageable with one portion of the shank to move the bolt, and a second roll back engageable with another portion of the shank to move the bolt, engageable with the first mentioned roll back to dog the same, and actuable by the last mentioned portion of the shank to release the first mentioned roll back.

9. In a door latch, a case plate attachable to a door, a latch bolt having a shank slidable over one side of said case plate and engageable with a keeper upon a jamb for the door, a handle stem upon the other side of said case plate, said latch bolt shank being movable relative to said handle stem upon pressure being exerted endwise of the bolt incident to closing the door against its jamb, a rollback for efiecting a retraction of the bolt carried by the handle stem between the case plate and bolt shank and engageable with a portion of the latter, and inaccessible means carried by the handle stem, forming a guide for the bolt shank and retaining the rollback between the bolt shank and. case plate.

10. In a door latch, a case plate having a substantially fiat portion, a latch bolt having a longitudinally movable shank upon one side of the fiat portion of the case plate, a handle stem extending through the flat portion of the case plate toward but terminating short of said shank, said shank being movable relative to said stem and having a longitudinally extending slot therein in alignment with said stem, a rollback sleeved on said stem between the shank and fiat portion of the case plate, and means maintaining the handle stem in assembled relation with the case plate and holding the handle stem against withdrawal from the rollback, including a member projecting from the handle stem within the slot aforesaid and forming a guide for the longitudinally movable bolt shank.

11. In a door latch, a case plate, a latch bolt having a longitudinally movable shank upon the inner side of the case plate, a handle stem 01)- erable from the outer side of the case plate extending through the case plate toward but terminating short of said shank, said shank being movable relative to the said stem and having a longitudinally extending slot in alignment with said stem, and means holding the handle stem in 9 the case plate and forming a guide for the bolt shank, including an element extending through the longitudinally extending slot in the bolt shank and secured to the handle stem.

12. In a door latch, a slidable bolt shank having two lateral projections, means engageable with one of said projections to actuate said shank, and means operable independently of the means just mentioned having a portion engageable with the other projection to actuate said-shank, having another portion engageable with the first mentioned means to dog the same, and having a third portion engageable by the first mentioned projection on said shank upon movement of the latter by pressure exerted endwise thereof to cause the second mentioned portion of said second mentioned means to be dis-engaged from the first mentioned means.

13. In a door latch, a slidable bolt shank having a lateral projection, means independent of said projection for sliding said shank, and actuating means for the bolt shank independent of the means just mentioned having portions straddling said projection, said shank being slidable relative to both of said means upon pressure being exerted endwise thereof, one of said portions being engageable with the first mentioned means upon movement of the second mentioned means in one direction to render the first mentioned means inoperative, and being engageable with said projection upon movement of the second mentioned means in another direction to slide said shank relative to said first mentioned means, the other of said portions being movable by said projection upon movement of the shank by pressure exerted endwise thereof when the first mentioned portion of the second mentioned means is in engagement with the first mentioned means to restore the said second mentioned means to normal position and thereby release the first mentioned means.

WILLIAM C. DEVEREAUX.