US2435180A

US2435180A - Latch

Info

Publication number: US2435180A
Authority: US
Inventors: Ledin Charles
Original assignee: Yale and Towne Manufacturing Co
Current assignee: Yale and Towne Manufacturing Co
Priority date: 1944-04-25
Filing date: 1944-04-25
Publication date: 1948-01-27
Anticipated expiration: 1965-01-27

Description

C. LEDIN LATCH Jan, 27, .1948.

Filed April 25, 1944 2 Sheets-Sheet l m Wm i m W IL IA w Jan. 27, 1948. (11.5mm i 9 LATCH Filed April 25, 1.944 2 Sheets-Sheet 2 1 llllllll 'igllllllllmnTli INVENTOR ATTO R N EY Patented Jan. 27, 1948 UNITED STATES PATENT OFFICE 2,435,180 LATCH CharlesLedin, Stamford, Conn., assignor to The" Yale'-&; Towne Manufacturing Company, Stam ford; (Donna, acorporation of Connecticut ApplicatibnApril' 25; 1944, Serial Nb. 532*,5'83

1'5- Cltims; (Cl. 292-228) This invention relates to a latch for a door; as"

objectives are obtained resides in the utilization of a novel form of latch adapted for operation by a handle member. More particularly; this teatureof my invention resides in a pivoted handle structure with which is associated a pivoted latch bolt, thelatch bolt being pivoted preferably onthe handle outwardly from the door and extending toward the door with itslatching surfacebetweenbetween the flanges of the channel so that the latch bolt overlies and encompasses the handle.

A still further feature'of this portionof my men-- tion' resides'in the means utiliz'eclf for limiting the pivotal movement of the latch bolt relatively to the operating handle on which it is pivoted.

A still further feature" of myi'nventionresides in the dogging mechanism utilized for dogging the operating handle of my latch. I g

I have thus outlined the more'important fe'a tures of my invention in order that my contribution to the art may be better understood and in order that the relation of my contribution tothe prior art may be better'comprehended. I do believe'that my contribution isbroad andthat I am entitled to patent claims not limitedto the structural details of my invention hereinafter set forth. Also, while I have'described' generally" several important features of my invention,-there are other importantfeatures that'will be describedparticularly in the specification and will be claimed in theclaims appended hereto.

Refer'ringnow to the drawings, Fig. 1 isa' perspective view of the latch applied to a door. Fig. 2' is a perspective view" showing the side of the door opposite that of Fig. 1'. Fig. 3' is a horizontal section through the latch and door showing particularly thecooperation of thelat'chbolt' and the strike. Fig. 4 is a section through Fig. 3 taken substantially along: lines l"---4 of Fig. 3. Fig. 5 is a view similar to Fig. 3'showingthe dogging member in r-eleased position and" the latch 2 bo1t'heldretracted by the operating handle; Fig; 6 is a section taken along 6-6 of Fig. 4. Fig. 7 is a section taken along lines 1--'|- of Fig. 6.

Referring now moreparticularly to the drawings', my latch comprisesan inner mountingplate lllbest illustrated-inFigs. 1 3 andfi and an outer escut'cheon if best illustrated" in Fig. 2. Mounting= plate I0 is formed with apair of inwardly extending ears lZ'that-are'best illustratedin Figs;

1 3 and 4;- these ears being adapted for insertion into a bore B that" is formed in" (1'00? I? to which my latch is'to be applied. The" ears [2 are bore'd fo'r the mounting therein or ashaft M and a pin I51 Rotatableabout the sh'aift' H913 ahanidle or latch operator designated generally by referenc numeral- [6. handle I 6 is preferably formed by meof one piece. anew may be a die casting or of sheet metal or any other construction that may be room desirable from time to time. A spring H is mounted about the shaft IA and extends over the pin [5 at one end-while bearing against a lug 18' ofthe handle 16 at-its" other end. It is of coursethe" function of the" spring IT to rotate the handle l6 clockwise in Fig. 3 to bring its limit shoulder l9 against-the mounting plate "1-, all as is quite apparent.

The jamb with which the door f3 cooperates is designated by reference numeral- 20 and has mounted thereon a strike 2 I. this strike 2'l'- is 1 a latch bolt 22 that isbSt s own in perspective in Fig. 1'1 The latch bolt 22' is channel in form} and is adapted to fit over the shank of the handlel6" with the shank of the handle t6 lying between the fiange'sfl22dof the latch bolt 22. The flanges-of the latchbolt ar'e drawn?- or otherwise suitably formed as shown at 23 in Fig. 7- tofurnish' bearing surfaces for cooperation with spring pressed pins 24 urged by a spring 25 against the said bearing surf-aces; Those skilled in the art" will readilyappreciate that his the function of thepins 24 tomount the latch bolt 22 for pivotalf movement relatively to the handle- IE.

For limiting this pivotal IildVlfiflt-,- the latch bolt 22 is formed with a depression 26 for" cooperation with the head 21'" of a threaded pin 28 having athreaded limit sleeve 29 mounted" thereon, all as shown iiri- Figs. 6 and- 7; Thethreaded pin 28* extends through an opening it'llm the latch' bolt depression 26 and into" more 31- of the handle' t6. It passes alsothrough anopen ing 32- in a limit plates: secured relatively to the bore 31 or the ha ndle It; The end'or the li'riiit sleeve 29 fits-against thef'lin'iit' plate 33 and, ser'i e's to limit movement-of the pin 28 to the left 'irbrh Cooperating with its position of Fig. 6. A spring 35 passes through a bore 36 in the pin 28 and is formed with a leg 31 lying against a surface of the handle [6. It is of course the function of the spring 35 to urge the latch bolt counter-clockwise about the pivot pins 24 in Figs. 3, and 6, and with the threaded pin 28 and sleeve 29 limiting this movement. As is quite apparentfrom the drawings, rotation of the sleeve 29 as by a screw driver will adjust the possible throw of the latch bolt by the spring 35.

Through the utilization of the mechanism illusl trated in Figs. 6 and 7, I obtain a very simple and effective latch adjusting mechanism for adjusting die or operating member IB is not dogged by means to be described presently, it may be rotated counter-clockwise from its position of Fig. 3 to its position of Fig. 5. This rotation naturally withdraws 'the latch bolt 22 from looking position, and the door may be opened. If the door is open and the latch bolt 22 and handle 16 are in their positions of Figs. 1 and 3, the latch bolt will impinge against the strike 21 as the door moves into closing position. The strike will readily overcome the resistance of the spring 35, and will cam the latch bolt 22 so that it will pivot clockwise from its position of Figs. 3 and 6 until the door reaches its position of Fig. 3. The latch bolt 22 will then be spring pressed outwardly into its locking position of Fig. 3 as is well illustrated.

It is interesting to note that in Fig. 3 the surface 221) of the latch bolt, called by me the latching surface, is adapted to be maintained in looking relation to the strike 2! evenwere the door to move even further toward closing position. Therefore, the latch bolt surface 22b is in a position to absorb any wear that may occur in the parts, or to compensate for warping or other displacement of the door.

For dogging the handle I6 against movement from the position of Fig. 3 to the position of Fig. 5, I utilize a dog designated by reference numeral 40 and having a detent adapted to enter a slot 42 in the mounting plate In defined at one end by a shoulder 43. Dog 40 is shown in Fig. 3 pressed by a spring 44, into its dogging position, in which position it blocks counter-clockwise rotation of handle it as is apparent. In order to move the dog 40 into its release position of Fig. 5,

it is necessary to depress it through pressure on the manually operated pin 45, moving the detent 41 out of the slot 42. Thereafter, the dog may be moved to its position of Fig. 5 and out of dogging position. To move the dog 40 back into dogging position, it need only be moved to the left in Fig. 5. The spring 44 will force the detent 4| into the slot 42 as soon as the detent is in position to enter the said slot. I believe that the operation and construction of the dogging mechanism will now be apparent.

It will be noted from Figs. 2, 3 and 4 that the escutcheon H is slotted as at 5D to permit movement of the handle is from its position of Figs. 1 and 3 to its position of Fig. 5. It is highly desirable that the slot 50 be closed against access in all positions of the handle It. For the particular purpose, the handle lG is slotted as at 5| and 52,

and for entering the said slots,5l and 52, I utilize a plate 53. This plate 53 is formed with a pair of legs 54 that are adaptedto he slipped over the handle 16 and through the slots 5!. The plate 53 is preferably formed of metal that is springlike in character and capable of allowing the spreading of legs 54 as those legs move into the position of Fig. 4 into the slots 5! and 52. The plate 53 will be retained because of its spring-like nature in its position of Figs. 2 and 4 and will efiectively block the slot 50, as is probably best illustrated in Fig. 2.

I believe that the operation and construction of my invention will now be apparent to those skilled in the art.

. I now claim:

1. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and "having hand grips adapted to extend outwardly at each side of the door whereby said handle may be swung on its pivot axis, a latch bolt pivoted on said handle at a pivot point displaced outwardly from the door and from the pivot axis of said handle, and extending from said pivot point toward said door, a latching surface formed on the portion of said latch bolt between the door and said pivot point about which it is pivoted relatively to said handle, and spring mean for pressing the latch bolt to latching position about its pivot.

2. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and having a hand grip adapted to extend outwardly at one side of the door whereby said handle may be swung on its pivot axis, a latch bolt pivoted on said handle at a pivot point displaced outwardly from the door and from the pivot axis of said handle, and extending from said pivot point toward said door, and a latching surface formed on the portion of said latch bolt between the door and its pivot.

3. In a latch of the class described, a mounting member adapted to be applied to the face of a door, a handle pivotally mounted on said mount ingmember and having a pair of hand grips, one of said hand grips extending from said mounting member through an opening of the door to be accessible at one side of the door, while the other hand grip is accessible at the side of the door to which said mounting member is applied, a latch bolt pivoted on said handle at a pivot point displaced outwardly from the door and from the pivot axis of said handle, and extending from said pivot point toward said door, a latching surface formed on the portion ofsaid latch bolt between the door and said pivot point, and spring means for pressing said latch bolt to latching position about its pivot.

4. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and having hand grips adapted to extend outwardly at each side of the door whereby said handle may be swung on its pivot, a latch bolt pivoted on said handle at a point displaced outwardly from the door and from the pivot axis of said handle, and extending from said pivot point toward said door, a latching surface formed on said latch bolt between the door and said pivot point, a spring moving said handle and latch bolt toward latching position, said latch bolt being movable with said handle to non-latching position against said spring, and being movable also on its pivotal mounting relatively to said handle into non-latching position.

. 5. In a latch of the class described, a mounting .member adapted to beapplied to the face of a door, a handle pivotally mounted on said mounting member and having a pair of hand grips, one or said handgrips extending from said mounting member through an opening of the door to be accessible at one side of the door, while the other hand grip is accessible at the side of the door to which said mounting member is applied, a latch bolt pivoted onsaid handle at a point displaced outwardly from the door and from the pivot axis of said handle, and extending from said pivot point toward said door, a latching surface formed on said latch bolt between the door and said pivot point, a spring for pressing said latch bolt to latching position about its pivot, a second spring moving said handle and latch bolt toward latching position, said latch bolt being movable with said handle to non -latching position against said second spring and being movable also on its pivotal mounting against said first spring and relatively to said handle into non-latching position.

6. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and having hand grips adapted to extend outwardly at each side of the door whereby said handle may be swung on its pivot, a channel shaped latch bolt pivoted on said handle at a point displaced outwardly from said door and with the handle lying between the flanges of the U formed by the channel, said latch bolt extending from said pivot point toward said door, a latching surface formed on said latch bolt between the door and said pivot point, and spring means for pressing said latch bolt to latching position about its said pivot.

7. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and having a hand grip adapted to extend outwardly at one side of the door whereby said handle may be swung on its pivot, a channel shaped latch bolt pivoted on said handle at a point displaced outwardly from said door and with the handle lying between the flanges of the U formed by the channel, said latch bolt extending from said pivot point toward said door, and a latching surface formed on said latch bolt between the door and said pivot point.

8. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and having hand grips adapted to extend outwardly at each side of the door whereby said handle may be swung on its pivot, a channel shaped latch bolt pivoted on said handle at a point displaced outwardly from said door and with the handle lying between the flanges of the U formed by the channel, said latch bolt extending from said pivot point toward said door, a latching surface formed on said latch bolt between the door and said pivot point, spring means for pressing said latch bolt to latching position about said pivot, a spring moving said handle and latch bolt together toward latching position, said latch bolt being movable with said handle to non-latching position against said spring and being movable also on its pivotal mounting against said spring means and relatively to said handle into non-latching position.

9. In a latch of the class described, a mounting member adapted to be applied to a door, a handle pivotally mounted on said mounting member and having a hand grip adapted to extend outwardly at one side of the door whereby said handle may be swung on its pivot, a latch bolt pivoted on said handle at a point displaced out wardly from the door and extending rrom said pivot point toward said door, a latching surface formed on said latch bolt between the door and said pivot point; spring means pressing said latch bolt to latching positionabout saidpivot,- and means for adjusting the Irig'tli of movement of said latch bolt relatively to said handle by said spring means.

10. In a latch of the class described; amounting member adapted to be appliedto a door, a handle ivotally mounted on said mounting member and having a hand grip adapted to extend outwardly at one side of the door whereby said handle may be swung on its pivot, a latch bolt pivoted on said handle ata pointdisplaced out-- wardly from the door and extending from said pivot point toward said door, a latching surface formed on said latch bolt between the door and said pivot point, spring means pressing said latch bolt to latching position about said pivot, and threaded means extending between said latch bolt and handle for limiting the movement of said latch bolt relatively to said handle by said spring means.

11. In a latch of the class described, a latch operator, means mounting said operator for pivotal movement, a spring pressing said latch operator toward a latching position, a channel shaped latch bolt, means mounting said latch bolt for pivotal movement on said latch operator and with said latch operator positioned between the flanges of the U formed by said channel, said latch bolt being movable bodily with said latch operator as said latch operator pivots on its mounting means, and a spring positioned between said latch operator and latch bolt for pressing said latch bolt to latching position relatively to said latch operator.

12. In a latch of the class described, a mounting member, a latch operator movable relatively to said mounting member, a dog mounted for movement on said mounting member into a dot;- ging and a non-dogging position relatively to said latch operator, portions of said mounting member and dog coacting for locking said dog against movement from dogging to non-dogging position when pressure is applied by said latch operator against said dog, spring means yieldingly maintaining said dog and mounting member portions in position for coacting, said spring means being adapted for manual actuation whereby said portions are withdrawn from coaotion and said dog is movable to non-dogging position.

13. In a latch of the class described, a mounting member, a latch operator movable relatively to said mounting member, a dog mounted for sliding movement on said mounting member into a dogging and a non-dogging position relatively to said latch operator, portions of said mounting member and dog coacting for locking said dog against sliding movement from dogging to nondogging position when pressure is applied by said latch operator against said dog, a spring pressing said dog against said mounting member to maintain said portions in coacting and locking relation, said dog being movable manually against the pressure of said spring to withdraw said portions from coaction and to release said dog for movement to non-dogging position.

14. In a latch of the class described, a latch operator, means mounting said operator for movement, a channel shaped latch bolt, and means mounting said latch bolt for pivotal movement on said latch operator and with the outer opposed surfaces of said latch operator positioned between and in juxtaposed relation to the flanges of the U formed by said channel.

15. Ina latch of the class described, a latch operator, means mounting said operator for movement, a channel shaped latch bolt, opposed spring pressed bearing members mounted in a bore of said operator and entering opposed bearings on the inside surfaces of the flanges of said channel shaped latch bolt for mounting said latch bolt for pivotal movement on said latch operator, said latch operator being positioned between the flanges of the U formedby said channel and with the outer opposed surfaces of said latch operator lying juxtaposed to the flanges of said latch bolt in reinforcing relation thereto.

CHARLES LEDIN.

REFERENCES CITED The following referencesfare of record in the file of this patent: