US1286344A - Latch. - Google Patents

Description

III. H. KENNEWEG.

LATCH.

APPLICATION FILED APII. I1. ma.

v Patented Dec. 3, 1918.

2 SHEETS-SHEET l.

`@Henley A. H. IIENNEWEG. LAH.

APPLICATION FILED APR. I7, 1918.

Lm Patented Dec. 3, 1918.

2 SHEETS-SHEET 2.

@IIN um,

aaron.

pacata.

Specification of Letters Patent.

Application led April 17, 1.913. y Serial N0. 229,079.

v To all whom t may concern:

lllll Aau Be it known that I, ALBERT H. Kennu- WEG a citizen of the United States, residin at rooklyn, in the county of Kings an State of New York, have invented certain new and useful Improvements in Latches, of which the following is a specification.

My invention relates to latches, having double throw bolts. y

An important object of the invention is to provide a latch of the above mentioned` character, having means for holding a bolt in the single throw position, such means being released to permit of the 4full throw movement of the bolt, by the inward movement of the bolt, upon the closing movement of the door. l

A further object of the invention is to provide a latch of the above mentioned char- Y acter formed of few and simple parts, and which is accordingly simple in construction, and inexpensive to manufacture.

Other objects and advantages of the invention will be apparent during the course of the following description.

lin the accompanying drawings forminga part of this specication and in which like numerals are employed to designate like parts through the same,

Figure 1 is a longitudinal sectional view taken on line 1 1 of Fig. 4,

Fig. 2 is a similar view taken on line 2-2 of Fig. 4,

Fig. 3 1s a side elevation of the latch,

Fig. 4 is a similar view with the side plate removed, showing the bolt in the outer double throw position,

Fig. 5 is a similar view showing the bolt in the innermost position, the same being moved thereto by means of the cam,

Fig. 6 is a similar view showing the bolt in the outer single throw position,

Fig. 7 is a similar View showing the bolt in the innermost position, the same being moved thereto by theclosing movement of the door,

lig. 8 is a side elevation of a lock-lever, an

Fig. 9 is an edge elevation of the same.

lin the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates the casing of the latch, provided upon one side with a main opening 11, covered by a plate 12. The plate l2 1s held in place by a screw 13, engaging a' lug 14, while any other suitable means this purpose.

The numeral designates a slide or reciprocatory bolt operating through an opening 16 in one end of the casing l0, and having its outer end beveled in opposite directions, as shown at 17,.whereby the latch may be used upon either side of a door. The bolt 15 is provided with an arm 18, rigidly secured thereto, and arranged within the casing 10. The arm 18 is provided at its free end With a lateral extension 19, disposed at a right angle with relation thereto. The bolt 15 has a rod 20 rigidly secured thereto, which is mounted to slide within an opening in the lug 14, as shown. The rod 20 has a head 21 rigidly secured thereto which limits the out- 'wardmovement of the bolt 15. vThe bolt 15 is urged outwardly by a compressible coil sprin 22, surrounding the rod 20, and conlined etweenl the bolt 15 and the lug 14, as shown.

As more clearly shown in Fig. 2, the closed side of the casing 10 is provided with a. transverse opening 23, rotatably receiving a pin or spindle 24, having a knob rigidly Patenten nee. a, iai. i

may be employedy forv secured to the outer end thereof, to turn the Y same.

The numeral 2T designates a cam, which is rigidly secured to the pin or shaft 24. This cam is provided with a shoulder 28 and a radial extension or finger 29. Surrounding Y the pin 24 is a torsional coil spring 30, one end of which is anchored thereto, as shown at 31, while its opposite end is anchored to a stationary stop or lug 32, as shown. -The stop 32 is disposed beneath and in the path of travel of the radial extension 29 and limitsthe forward turning movement of the cam, which turning movement is effected by the spring 30. i

The numeral 33 designates a lock-lever, the forward end of which is preferably beveled and adapted' to engage a beveled shoulder 34 of the bolt 15. The lock-lever 33 is pivoted to the casing '10, as shown at 35,

and a latch element 36 is also connected with shown at 38. This leaf spring is coiled about the pivot or screw 35, and its opposite end is anchored to the latch element 36, as shown at 39. The spring 37 functions to swing the lock-lever 33 upwardly and the latch element 36 forwardly. The latch element 36 is provided at its upper end with aA l be turned to move the bolt inwardly. A

pin tumbler lock may also be employed for this purpose.

The operation of the-latch is as follows:

WhenV the bolt 15 is in the outer double throw position, as indicated in Fig. 4, the same maybe drawn to the innermost position, as indicated in Fig. 5, by a turning movement of the knob 25. When the knob is turned, the cam 27 first swings the lock-lever 33 downwardly, as it is contacting therewith, whereby the bolt 15 is free to move inwardly When the radial extension 29 contacts with the extension 19 of the arm 18. As shown in Fig. 5, the cam 27 has been turned to its rearmost position, with the bolt 15 in the innermost position, and the shoulder 28 beneath the shoulder 41. lThen the knob 25 is released, the spring 22 moves the bolt l5 to the outer single throw rposition, as indicated in Fig. 6, the bolt being now held against further' outward movement by the shoulder 28 engaging beneath the shoulder 41 'of the latch element 36. It is obvious that the knob25 may be turned to shift the bolt 15 from the outer single throw position to the innermost position. When the door is closed, the bolt 15 is moved inwardly by contacting with the keeper. thus causing the rearward movement of the arm 18, whereby the extension 19 contacts with the extenslon 40 of the latch element 3G. The latch element 36v is therefore swung rearwardly s0 that the shouldersl 2S and 4l are disengaged, whereby the spring 3() at once returns the cam 2i' to its normal starting positionQ'The bolt l5 will now move forwardly 0r outwardlyy to the double throw position, as indicated in Fig. 4, at which time the lock-lever 33 will swing upwardly and be positioned behind the bolt. thereby locking the same against further inward movement, until the lock-lever 33 is depressed by manipulation ot' the ram 2T.

It is to be understood that the form of my inventiony herewith shown and described is to beV taken as a preferred example of they same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, what I claim is 1. A latch of the character described comprising, a casing, a reciprocatory bolt slidably engaging the casing, an arm attached to the bolt and provided with a lateral extension, a pivoted caln having a shoulder and a radial extension to engage with the first named extension, a pivoted lock-lever disposed to have one end thereof move into the path of travel of the bolt and arranged to Contact with the cam and be shifted thereby, and a pivoted latch element having a shoulder to engage With the first named shoulder for locking the pivoted cam V against movement in one direction and an extension arranged in the path of travel of the lateral extension.

2. A latch of the character described comprising, a casing, a reciprocatory bolt slidably engaging the casing, an arm attached to thebolt and provided with a lateral eX- tension, a pivoted cam having a shoulder and al radial extension to engage with the first named extension, a spring to move the bolt outwardly, a spring to return the pivoted cam to its starting position, a pivoted lock-lever disposed to have one end thereof' move into the path of travel of the bolt and arranged to contact with the cam and be shifted thereby out of the path of travel of the bolt, a pivoted latch element having a shoulder to engage with the first named shoulder and hold the cam against turning movement in one direction and an extension arranged in the path of travel of the lateral extension, and yielding means to move the lock-lever and latch element to the active position.

3. A latch of the character described comprising. a casing; a reciprocatory bolt slidably engaging the casing, an arm secured to the bolt, a spring to move the bolt outwardly, a pivoted lock-lever arranged to have one end thereof move into the path of travel of the bolt, yielding means to move the pivoted lock-lever to the active position. a pivoted cam to move the lock-lever to the inactive position and having means to engage with the arm and move it rearwardly, yielding means to move the cam to the starting position, and releasable means t'or holding the cam against movement in one direction and adapted to be operated by said arm. i

4. A latch of the character described comprising, a casing, a movable bolt associated with the casing, an arm secured to the bolt to move it in one direction, a spring to move the bolt outwardly, a movable lock lever adapted when moved to "the active position ment in one direction and adapted toconiaci;r to hold the bolt aga-inst inward movennenl therewith and be operated by said arm. 1o means to move the lock levei` to the active In testimony whereof I amx my signe,- position, a cam nrran ed to contaciI with the ture in presence of two witnesses.

5 lock lever and shift t e same to the inactive ALBERT H., KEN position, yielding` means to move the cam to itnesses: the starting position, ond releasnble means WILLIAM Gr., REHBMN, for holding the cam against winningI move- C.. NATHAN ST n

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