US1805997A - Doorlatch mechanism - Google Patents

Description

May 19, 1931. s. 1.. RHINER DOORLATCH MECHANISM Filed May 2, 1930' '5 knob in any Patented May 19, 1931 UNITED STATES messes PATENT Fries SHE-BRIE L. RHINER, 0F

DOORLATCH Application filed May 2,

This invention relates to a door latch mechanism and has for its principal object the provision of a latch mechanism which can be operated by tilting or swinging the direction as well as in the usual manner by rotating the knob. v

Another object of the invention is to provide a latch mechanism which will accomplish the above and yet will be extremely simple in its mechanical construction.

Other objects and advantages reside in the detail construction of the invention which is designed for simplicity, economy, and efficiency. These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawings which form a part hereof. Like numerals refer to like parts in all views of the drawings and throughout the description.

In the drawings:

Fig. 1 is a perspective view illustrating the latch as it would appear upon a door.

Fig. 2 is a side elevation of the assembled latch.

Fig. 3 is a side elevation with the cover plate removed illustrating the interior construction. I

Fig. 4 is a vertical section through the latch in position. The latch section in this view is taken on the line H, Fig. 3.

Fig. 5 illustrates in diagram various positions of the interior mechanism corresponding to various positions of the door knob, to be later described. 6

At 10 in the drawings a section of a typical door is illustrated.

The invention comprises a latch case 11, one edge of which is provided with the usual latch plate 12. When in place on the door the case 10 and the plate 12 are inset in a mortise so that the surface of the plate 12 will be flush with the edge of the door 10, as is usual with door latches. The case 10 is closed by means of a cover plate 13 secured thereon by a single clamp screw 14:. The clamp screw let is threaded into a pivot post 15 extending from the back of the case 11. Two latch guide blocks 16 and a fulcrum.

PINE BLUFFS, WYOMIIIG MECHANISM 1930. Serial No. 449,164.

pin 17 also extend from the back of the case 11 and project through the cover plate 13.

A latch bolt 18 is constantly urged through the plate 12 by means of a compression spring 19 which is compressed between the guide blocks 16 and the head of the latch bolt 18. The rearward extremity of the bolt 18 is turned to a relatively smaller diameter so as to pass between the blocks 16 and is provided with a longitudinal slot 20.

A first toggle member 21 is hinged upon the pivot post 15. A second toggle member 22 is preferably formed of two sheet metal leaves there being one leaf secured to each 1 side of the toggle member 21 by means of a pivot pin 23. The upper extremity of the second toggle member 22, extends through the slot 20 in the latch bolt 18. The spring 19 acts'to constantly close the two toggle members 21 and 22 against each other. movement however, is limited and guided by the fulcrum post 17 which extends through an irregular opening 25 in the second toggle member 22. The first toggle member 21 is prevented from swinging to the left in Fig. 3, by a pointed extremity 21 which contacts with one of the guide blocks 16. It is free to swing to the right however.

It will be noted that the inner edges of both the toggle members are arcuate and concave so as to form an elliptical space therebetween. In this space a toggle operating mechanism is carried. The toggle operating mechanism comprises two plates 26 maintained together by means of which a roller bearing 28 may be carried to roll against the arcuate faces of the'toggle members 21 and 22. In each plate 26 a rectangular hole 29 isformed.

The latch bolt is actuated by either moving the plates 26 laterally or vertically or by rotating them. These movements are accomplished by means of knobs 30, on the stems 30' of which balls 31are formed. The knobs are held in place by means of escutcheons 32, in which ball sockets 33 are formed for the reception of the balls 31. The stems 30 of the knobs 30 are provided with longitudinal rectangular cores in which rectangularkeys 34 slide. The keys 34' are formed Their spacing rivets 27 upon each of be varied,

with rectangular tapered extremities 34 which are constantly forced into the rectan-' gular openings 29 in the plates 26 by means of compression springs 36.

Owing to the thrust of the springs 36 the escutcheons 32 must be securely clamped to the door 10. This may be accomplished by passing headed sleeves 37 through one escutcheon, into which clamp screws 38 are threaded through the other escutcheons. Both the screws 38 and the sleeves 37 pass through openings in the case ll and the cover 13 so that their position may be accurately located.

Operation Let us assume that one of the knobs 30 is forced downwardly, as shown in. broken line in Fig. 4, This causes the extremityof the key 34 to force the toggle opera-ting mechanism upwardly as shown at A, Fig. 5. In moving upward, the upper roller; 28 forces the toggle member 22 to the left causing; its extremity 24 to retract the latch bolt 18.

Let us assume that one of the knobs 30' is raised to the upper broken line position of Fig. 1. This. causes its latch pin 34:- to force the operating mechanism downwardly as shown at B so that the; lower roller'28 will force the toggle member 22 to the left to retract the latch; bolt.

Let us assume that one of the knobs 30- is rotated.

This acts through the key 84 to: rotate the operating mechanism, as shown at C, causing the two rollers28to act as a lever'between the toggle members to-pry' the toggle member 22' to the left to actuate the latch. bolt.

Let us assume that one of the knobs 30 is moved laterally to the right. This will cause its key 34: to force the operating mechanism to the left, as shown at. D, causing one or both rollers 28 to act against andforee: the toggle member- 22 to the left.

Let us assume that the knob 30: is swung to the left. This will swing the opera-ting mechanism to the right, as indicated at E causing one or both of the rollers 28 to engage the first toggle member 21; and swing it to the right about the stud 15 so thatits lower extremity will swing the lower extremity of the member 22 to the right. The member 22 acts as a lever about the fnlcrun'i, pin 21 so that its upper extremity will swing to the left to retract the latch bolt 18;

In the remainder of the case 11 any of the standard key locks may be installed if it is desired to employ the invention with'a key operated mechanism In this type oflook the key actuated bolt could project through. the plate 12 as indicated at F, Fig. 1.

lVhile a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may within the scope of the, appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is i l. A door latch mechanism comprising: a latch bolt; a. bolt operating mechanism; knobs mounted for swinging movement; keys projecting from said knobs so as to actuate said bolt operating mechanism; and springs positioned so as to force said keys to co-act with said operating mechanism.

2. A latch operating mechanism comprisng; a latch belt; a, fixed pivot; a first toggle lever mounted on said fixed pivot; a second toggle lever hinged to the extremity of said fixed lever and arranged tolie adjacent there-v to, said second toggle lever being operatively connected to said latch bolt and a toggle operating member-mounted between; said two levers so that lateral or rotative movement thereof will act to swing said levers.

3;. A latch operating mechanism comprise ing: a latch belt? a fixed pivot; a first toggle lever mounted on saidfixedpivot; a second toggle lever hinged to the extremity of said fifxer lever and arranged to, lie adjacent there to, said second toggle lever being operatively cQnllected to said latch bolt; a toggle operating member mounted between said two: levers so that lateral or rotative movement. thereof will act to swing said; levers and a second pivot pin adapted-tocontact with; said second toggle leverwhen said latter lever moves in one direction; and to. release sai dlever inother directions. 7

4. A latch operating mechanism comprising a latchbolt; a fixed; pivot; afirst toggle lever mounted on said fixed pivot; a SQQQILd toggle lever hinged to, the extremity of said fixed lever and arranged to lie adjacent there,- to, said second toggle lever being operatively connected to said latch belt; a toggle operating member mounted between said two levers so, that lateral or rotative movement thereof will act, to swing said levers; areuate faces on said levers arranged to cooperate with said actuating member. I

5.. A door latch mechanism comprising; a latch bolt; a fixedpivot post; a first toggle lever mounted on said pivot 'postand ex:- tending away from said latch bolt; a. second toggle lever hinged to the extremity ofthe first toggle lever extending toward said latch bolt and operati-vely connected thereto; a; latch; operating memberpositioned between and held inlpl'ace by said toggle levers sotha-t rotation ormovement thereof willactuate said levers to retract said latchbolt.

e, A door latch mechanism; comprising: a latch bolt; a fixed pivot post; a first toggle lever mounted on said pivot. post and extendingaway from said-l'atchbolt a second toggle lever hingedto -the extremity of the first toggl'ealever-and extending toward-{said latch bolt and operatively connected thereto; a latch operating member positioned between and held in place by said toggle levers so that rotation or movement thereof will actuate said levers to retract said latch bolt; knobs; a universal joint for said knobs so as to allow them to be swung laterally or vertically or rotated; keys projecting from said knobs into operative contact with said latch operating member so as to impart a corresponding movement thereto.

7. A door latch mechanism comprising: a latch bolt; a fixed pivot post; a first toggle lever mounted on said pivot post and extending away from said latch bolt; a second toggle lever hinged to the extremity of the first toggle lever and extending toward said latch bolt and operatively connected thereto; a

latch operating member positioned between and held in place by said toggle levers so that rotation or movement thereof will actuate said levers to retract said latch bolt; and a pivot pin arranged to co-act with said second toggle lever when said first toggle lever is moved and to release said toggle lever when it is moved independently of said first toggle lever.

In testimony whereof, I aflix my signature.

SHERRIE L. RHINER.

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