US1880637A

US1880637A - Door latch

Info

Publication number: US1880637A
Application number: US562774A
Authority: US
Inventors: Wood David Wilson
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-09-14
Filing date: 1931-09-14
Publication date: 1932-10-04
Anticipated expiration: 1949-10-04

Description

Oct. 4, 1932. D. w. woon 1,880,637

DOOR LATCH Filed Sept. 14, 1931 2 Sheets-Sheet l In ENT- R WlTNESS (D. 00d.

. BY M Mk5,

ATTORNEYS.

' D. W. WOOD Oct. 4, 1932.

DOOR LATCH Filed Sept. 14, 1931 2 Sheets-Sheet 2 Woo T Q 1 6 N 3 W 8 .M kRAm 00 l ATTORNEYS.

Patented Oct. 4, 1932 DAVID wrnsolv woon, OF BRAZIL, INDIANA noon LATCH Application filed September 14, 1931. Serial No. 562,774.

This invention relates to a device forlatching or bolting all kinds of doors and which is applicable to doors of automobiles, and which has especial reference to a door latch of the type disclosed in my copending application filed May 26, 1931, Serial No. 540,112.

The bolt of the latch to which the present invention is applicable may be operated both from the inside and outside of the door to which it is applied, with the further provision that the latch bolt may vbe controlled from the inside of the door so that the bolt cannot be operated from the outside of the door. V

The principal object of the present invention'is the provision of a simple, reliable and eiiiectual means for retracting the latch bolt from the inside of the door or the like to which the latch is applied, and for preventing means being operated from the outside of the door to retract the bolt to open the door.

lVith the foregoing and other objects in view the invention resides in the particular provision, construction and operation of the parts hereinafter fully described and illustrated in the accompanying drawings, in which Figure 1 is a vertical section showing the device applied to a door' and its jamb, the link of the inside bolt operating means being shown retained in a neutral position;

Figure 2 is a section taken on the line 22 of Figure 1;

Figure 3 is a view similar to Figure 1 but showing the bolt retracted by the inside operating means;

Figure 4 is a view similar to Figure 1, but showing the link of the inside bolt operating means in a latching position to prevent the retraction of the bolt by the outside operating means;

Figure 5 is a detail section;

Figure 6 is a section on the line 66 of Figure 1.

In the drawings there has been shown, by way of example, an automobile door 10 and its jamb 11 forming part of the body of the automobile, and it being understood that the door 10 swings on a vertical axis. The latch assembly carried by the door 10 is received means consists of a handle connected, with a gear OI ltS equivalent 21 which meshes with in a space or recess in the door The latch assembly includes a latch bolt 12 mounted for sliding movement between. blocks 13 and 14- secured to a plate 15 which is secured to the door. The bolt 12 is retained in a retracted position by means" generallydesig nated 16, and said means cooperates with a .cam 17 on the jamb 11 to release the bolt 12 to its latching or bolting position as the door 10 is moved into its closed POS11Z101L' The said means l6v is fully disclosed in the copending application mentioned hereinabove,-and forms nopart of the present invention It is to be understood that the invention is applicable to other types of latches including a bolt movable into and out of a latching or bolting position. The bolt 12 is under the influence of a spring 18, which has one end in engagement with a: lug 19 on the plate 15, and-its opposite end being dis posed in a bore in the bolt 12 and incontact therewith to move the bolt to its latching or bolting position; v

The bolt 12 is retracted bymeansoperable from the outside of the door 10. The said a gear or its equivalent 22.

Gears

21 and 22 are mounted for rotation between a flange 23 formed on the plate 15, and a plate 24.

secured to the flange 23, the plate 24; being secured to the flange 23 by spacer rivets 25. o The gear 22 is mounted on a square shaft 26 which iscau sed to rotate with the gear 22.

An arm or member 27 is secured to the shaft 26 by a set screw 28. The arm or member 2'7 swings in response to the turning movement of the shaft 26. The said arm or member 27 cooperates with astud-or pin 29 projecting laterally from the bolt 12. It will 490 now be apparent that when the handle 20 is swung-downwardly or ina counterclockwise direction, the bolt 12 will be retracted,

through the intervention of the gears 21,. and 22, the shaft 26, the arm 27 and the stud 29.

Means is provided for retracting the bolt 12 from the inside of the door,.and also for preventing the operation 10f the outsideboltxopgerating means to thereby maintain :theldoor locked or latched against being opened from the outside. The said inside operating means includes a handle lever 30 having secured thereto a radial arm 31 pivotally connected as at 32 with one end of a rigid link 33 whose opposite end has a slot 34 which receives a laterally projecting stud 35 on the bolt 12. It will be understood that the slot 34 and stud 35 provide a pivotal and slidable connection of the link 33 with the bolt 12. It will now be apparent that when the handle lever 30 is swung upwardly, the bolt 12 will be retracted through the intervention of the arm 31, link 33 and stud 35, as shown most clearly in Figure 3.

In order to retain the link 33 in a neutral position, as shown in Figure 1, so that the bolt 12 may be retracted by the outside operating means, there is provided means consisting of a spring 36 secured to the arm 31 and extending radially with respect to the fulcrum of the handle lever 30, and a spring pressed detent orball 37 carried by a plate 38 secured to the door. The spring 36 is en; gageable with the ball 37 to releasably retain the link 33 in the neutral position, as shown in Figure 1. b

When it is desired to lock or latch the door against being opened from the outside by the inside operating means, the handle lever 30 is swung downwardly from the neutral position bringing the point of pivotal connection 32 below the fulcrum axisof the handle lever. The link 33 will then be in the'path of movement of the swinging arm 27 in contact there with, and the spring 36 will be in contact with a stop 39 on the plate 38, as shown in Figure 4:. This will prevent the bolt 12 being retub? latter from being operated to retract said 2. In a device of the class described, the combination of a slidable latch bolt, means including a rigid swingable member to retract the bolt from the outside of the door or the like to which the device is attached; means including a link having endwise movement to retract the bolt from the inside of said door; said link beingmovable to a position to engage said swingable member, and means limiting the movement of the second means to hold said link in said position to prevent said first means from being operated to retract said bolt.

' 3. In a device of the class described, the combination of a latch bolt movable to a latching position and a retracted non-latching position, a handle lever, a link having one end pivotally connected withsaid lever and the opposite end of said link being connected with said bolt by means which cause the retraction of said bolt in response to the operation of said lever, and which allows movement of said bolt relatively to said link-to a retracted position, additional means operable to retract said bolt, said link being engageable with said last mentioned means, and means limiting the movement of said lever to hold said link engaged with said last mentioned means to prevent theaoperationof the latter to retract the bolt.

DAVID WILSON WOOD.

tracted by the operation of the handle20'. It

will be apparentthat the arm 27 lies against the vertical flange 40 on the bolt 15. It will therefore be apparent that with the parts in the relationship shown in Figure 4 the arm 27 cannot be swung in either direction.

From the foregoing it will be apparent that the latch bolt 12 may be retracted for the purpose of opening the door from both the inside and outside of the door by reason of the means provided; and that the door may be locked or latched against being opened by the operation of the outside means by setting the inside means so as to engage the arm 27.

I claim: a e

1. In a device of the class described, the combination of a slidable latch bolt, means to retract the bolt'from the outside of the door or the like to which the device is attached, a

rigid link, a pivotal and slidable connection between-the link and said bolt, means to move said link in opposite directions from slink engaged with said first means to prevent I the inside of the door, whereby the bolt may 7 lli)