US2289834A - Lock for latches - Google Patents

Description

July 14, 1942.

S. P. GOLDBERG LOCK FOR LATCHES Filed Oct. 51, 1939 2 Sheets-Sheet 1 I 621/061 P Gamma W ATTORNEY y 1942- v S.-P. GOLDBERG 2,289,834 7 LOCK FOR LATCHES Fired Oct. 31, 1959 2 Sheets-Sheet 2 IIIIIIIIIII IIIIII/ I n/uun IIIIIIlllllllIlIIIII/IIIIIIIIIIII run/"nun I s f/maa P 620% INVENTO Patented July 14, 1942 UNITED STATES PATENT OFFICE LOOK FOR LATCHES Samuel P. Goldberg, Brooklyn, N. Y.

Application October 31, 1939, Serial No. 302,103

4 Claims.

The present latches.

An object of this invention is to provide a device of the character mentioned, of novel and improved construction, which can be used in connection with present-day type and even with already installed latches.

Another object hereof, is to provide a device of the nature set forth, in which there is no increase in the number of separate parts to be dealt with in the installation of a latch set employing this invention, nor is there any material increase in the amount of work one is called upon to do to install the same.

Another object of this invention is to provide a latch lock of novel and improved construction, which is positive in its locking and unlocking op erations, and which includes means to give audible signal to indicate that the latch is either locked or unlocked, as the case may be.

A further object hereof, is to provide a latch lock of novel and improved construction, which is adaptable to be controlled from either the inside of a room, from the outside, or both, as the particular use may require, and which may be used in connection with latches of various types.

Another object of this invention, is to provide an article of the character described, which when installed in connection with latch mechanism, does not materially alter the appearance and compactness of present latch sets.

A further object is to provide an article as mentioned, which is cheap to manufacture, easy to install, which facilitates conveniences in latch uses, which is simple in its operation and eiiicient in carrying out the purposes for which it was designed.

Other objects will become manifest as this disclosure proceeds.

In the accompanying drawings forming part of this application, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 shows the present invention in connection with a latch set, used in a manner whereby the latch, without opening the door, may be locked or unlocked by means of a finger-piece from the inside of the room, and by a key-means from the outside. This figure is a diagrammatic representation showing the components of the latch set, slightly apart rather than in true assembled position, to aid towards a clearer visualization of the set up.

Fig. 2 is a bottom view of Fig. 1.

Fig. 3 shows the front View of the key-hole piece included in the foregoing views.

invention relates to locks for Fig. 4 shows a form of key, suitable for the component illustrated in Fig. 3.

Fig. 5 is a partial section through the units comprising this invention, taken at and along line 5-5 in the Fig. 9.

Fig. 6 is a section taken at and along line 66 in the Fig. 2.

Fig. 7 shows the inside of the unit indicated generally by the numeral 25, minus parts housed therein.

Fig. 8 shows the inside of said unit together with its contents in position whereby the latchs spindle is held against rotation, meaning the latch is maintained in locked condition.

Fig. 9 is a similar view showing said contents in position whereby the latchs spindle is free to be turned to retract the latch, meaning the latch is in unlocked condition.

Fig. 10 shows the present invention used on a type of latch set, which employs a two-part spindle and carries a key-operative means within the knob which is outside the room, whereby, without opening the door, the latch is locked or unlocked from the inside of the room by means of a finger piece, and from the outside, by key or freely, respectively.

Fig. 11 shows the present invention used in connection with an ordinary closet door latch-set, whereby the latch can be locked or unlocked by a key-operative means from the outside of the closet only.

Fig. 12 shows diagrammatically, a section through a common latch unit, as taken along l2-|2 in Fig. 1, and as would appear along line |2-|2' in Fig. 10.

Fig. 13 shows diagrammatically, a section taken at line l3l3 in Fig. 12, to illustrate the construction found in the latch of Fig. 10, which utilizes a two-part spindle.

In the drawings, I have shown several ways of adapting my present invention for connection with latches of various types and uses.

The knobs l9 and 2B, the spindle 2| Which has a square cross section, and the unit indicated by the numeral 22, are of an ordinary latch set. However, for the use made of my invention in the set up shown in Fig. 1, instead of the usual rosettes 0r escutcheons 23 which complete the latch set as commonly constituted, I substitute the units indicated generally by the numerals 24 and 25.

The unit 24 comprises a rosette 26, through which, near its periphery, is journalled a socket piece 21, having a key socket 28 at its forward end for reception of key 29, and a rectangular socket to receive the blade 3|. Of course, any other suitable key form or wrench means convenient to be treated as a key, may be used in place of the one illustrated.

The unit 25 comprises a rosette 32, through which said blade 3| is suitably journalled in position adapted for axial alignment with the socket piece 27; said blade here terminating outside the rosette 32, in a finger piece 33. Inside said rosette, blade 3| carries a cam 34, which for its intended function may be rectangular and substantially concentric with respect to said blade.

Integral with the rosette 32, are screw tubes 35, against two of which as stops, rests a spring 36 made of fiat stock, whose ends lie along the inner rim of the rosette. This spring also rests, under stress, against the cam 34. Against the spacer boss 36 and between the track elements 31, is free to slide the spindle lock plate 38, the position of which is determined by the angular position of the blade 3|, because an end of said plate 38 rests against, or in the set up illustrated, is free to rest on said blade 3 The knob spindle 2| is free to turn in bore 39 through the rosette 32, but edge 43 of the opening 4| in the lock plate 33, lies in abutment with the spindle surface when the blade BI. is axially turned to shift said plate into such position as is shown in Fig. 8, whereby rotary axial movement of the spindle 2| is prevented, thus locking the 1 latch bolt 42 of the unit 22. When blade 3| is turned to assume the position shown in Fig. 9, the spindle 2| is again free to turn, because the lock plate 38 is now free to be shifted toward blade 3|, when the latter is turned by either of the knobs H! or 2B. In fact, in the set up described and illustrated, said lock plate 38 will freely fall onto blade 39, due to action of gravity. However, the line or direction of movement of the lock plate 38 is immaterial to proper operation of the device, and the arrangement wherein the lock plate 33 moves downward for unlocking, though desirable, is not essential.

Utilization of the cam 34, affords comparatively broad surfaces against the spring to insure a more positive stay for the blade positions, so that the knob spindle 2| is more securely locked or unlocked than heretofore obtainable. There cannot occur any accidental unlockings nor intermediate positions of the blade 3|, for the spring causes the operating blade 3| always to be at either complete locking or unlocking positions. Also, it is to be noted that the spring 35, in its movements to fuller stressed or to lesser stressed conditions, will cause a clicking sound to occur,

thus advising of the completion of shift to either positive locked or positive unlocked conditions of the device. Furthermore, it is desirable that the dimensions of the cam 34 be such with respect to the dimensions of the operating blade 3|, that the amount of shift of the spring shall exceed the amount of urged shift of the locking plate 38. This can be accomplished by a cam shaped as 34 shown only in Fig. 7. The operation of the device is obvious from the above, and its adaptation to present installations is evident, for all that is required, is, that the rosettes which would be of the type as indicated by the numeral 23 in Fig. 11, be removed, and units 24 and 25 be mounted in their place, namely, unit 25 on the surface of the door which is inside the room, and unit 24 on the outside; the telescopic action of the blade 3| into the socket piece 2?, taking care of various door thicknesses.

Depending upon the specific uses to which this invention may be employed, will govern which of the units 24 or 25 will be fitted with or without finger piece 33 or a key socket means as 28, and in an instance now to be described, the unit 24 is entirely dispensed with. Such latter condition is shown when the locking device is to be applied to closet looks, as an example. Here, in Fig. 11, for the finger piece 33 in the arrangement shown in Fig. 1, the unit 25, is instead provided with a key socket 28, and socket piece 2'! becomes unnecessary. The latch 42 is locked or unlocked, merely by use of a key 25.

Referring to Fig. 10, where my invention is shown used with a latch set employing a twopart spindle, my units 24 and 25 are mounted in reverse order to that shown in their use in Fig. 1, the finger piece 33 is omitted from unit 25, but is substituted for the key hole 28; all other mechanism remaining. The spindle here is in two parts designated by the numerals 43 and 44. Through the axis of spindle 44, lies a loose shaft 45, which is secured to spindle part 43 and extends out of spindle part 44, and terminates in a slotted head 45, which head is engaged by tab 47, of a key'cylinder means 48 housed in outside knob 49, carried on said spindle part 44.

Ordinarily, in single spindle latches as 2|, the spindle carries a hub having the outwardly extending lugs 52. Upon axial rotation of the spindle, it is obvious that the latch 42 will be retracted because 53 is a collar on pin 54, while 55 is a lug integral with the frame 55. The remainder of Fig. 12, is obvious without further description and is well known. The construction having the two hubs 5i] and 5|, for the two-part spindle construction, is also old, and therefore needs no further details to be described for the purposes herein. It is sufficient to mention that hub 5| is mounted on spindle part 44 and that hub 50 is mounted on spindle part 43.

Coming back to Fig. 10, it is obvious that unit 25 controls the movement, that is, looks or unlocks the spindle part 44. When in unlocked condition, turning knob l9 will cause hub 50 to retract the latch 42, while when knob 49 is turned, it will cause hub 5| to retract said latch. Now if finger piece 33 is shifted upwards to either side, spindle part 44 is locked. The latch 42 is free to be retracted by means of knob I9. It is evident that knob 49 cannot be turned. But with a proper key in 48, tab 41 can be made to turn shaft 45, which action will of course turn the spindle part 43, and the door will open.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the specific embodiments and uses herein set forth shall be deemed illustrative and not restrictive, and that the patent shall cover whatever features of patentable novelty are herein included; reference being had to the following claims rather than to the particular description herein to indicate the scope of the invention.

I claim:

1. A look for the spindle of a door latch, comprising a rosette adapted to be mounted on the door, provided with a bore to receive the spindle therethrough, a' member of elongated cross-section axially rotatably mounted within the rosette, provided with an operating element at the exterior of the rosette, a locking plate freely movably mounted within the rosette, adapted to be shifted by and upon rotation of said member to a position whereby said plate contacts and maintains the spindle of the door latch against axial rotation; the respective axes of rotation of the spindle and the said member being substantially parallel, a cam having the vertices of an oblong carried on said member, and a blade spring positioned within the rosette, adapted to exert a constant stress against the cam along a line substantially perpendicular to the axis of rotation of the aforementioned member; said spring resting upon two of said vertices in rest position.

2. A look for the spindle of a door latch, comprising a rosette adapted to be mounted on a door, provided with a bore to receive the spindle therethrough, a member of elongated cross-section axially rotatably mounted within the rosette, provided with an operating element at the exterior of the rosette, a locking plate freely movably mounted within the rosette, adapted to be shifted by and upon rotation of said member to a position whereby said plate contacts and maintains the spindle of the door latch against axial rotation and in locked condition; the respective axes of rotation of the spindle and said member being substantially parallel, a cam carried on said membenand a blade spring positioned within the rosette, adapted to exert a constant stress against the cam along a line substantially perpendicular to the axis of rotation of the aforementioned member; said cam, upon movement of the plate to lock the spindle, being adapted to shift the spring beyond the normal position of the spring when the spindle is in locked condition and free the spring to shift from the position it assumes at such maximum stressed condition to its normal rest position when the plate comes to rest, whereby an audible signal is emitted upon the spring coming to rest against the cam.

3. A look for the spindle of a door latch, comprising a rosette adapted to be mounted on the door, provided with a bore to receive the spindle therethrough, a member of elongated cross-sec tion axially rotatably mounted within the rosette, provided with an operating element at the exterior of the rosette, a locking plate loosely movably mounted within the rosette, adapted to be shifted by and upon axial rotation of said member, to a position whereby said plate abuts and maintains the spindle of the door latch against axial rotation; the respective axes of rotation of the spindle and the said member being substantially parallel, a cam having the vertices of an oblong, carried on said member and a spring positioned within the rosette, adapted to exert a constant stress against the cam along a line substantially perpendicular to the axis of rotation of the aforementioned member; the difierence between the major axes of the cam and said member being greater than the diiference between the minor axes of said cam and member, whereby the cam is adapted to shift the spring through a range of movement greater than the range of movement of the locking plate actually caused by the said elongated cross-sectioned member.

4. A look for the spindle of a door latch, comprising a rosette adapted to be mounted on a surface of the door, a second rosette adapted to be mounted on the opposite surface of the door; each rosette being provided with a bore to receive the spindle therethrough, a blade axially rotatably mounted within the first rosette, a locking plate loosely moveably mounted within the first rosette, adapted to be shifted by and upon axial rotation of the blade, to a position whereby said plate abuts and maintains the spindle of the door latch against axial rotation; the respective axes of rotation of said spindle and blade being substantially parallel, a cam having the vertices of an oblong, carried on the blade within the first rosette, a spring positioned within said first rosette, adapted to exert a constant stress against the cam along a line substantially perpendicular to the axis of rotation of the blade, an element provided with a socket, axially rotatably mounted within the second rosette and adapted to receive the blade within said socket upon mounting the rosettes on the door; the respective axes of rotation of the blade and said element being in alignment, and means extending at the exterior of the second rosette adapted for movement to cause axial rotary movement of said element; the difference between the major axes of said cam and blade being greater than the difference between the minor axes of said cam and blade, whereby the said cam is adapted to shift the spring through a range of movement greater than the range of movement of the locking plate actually caused by th blade.

SAMUEL P. GOLDBERG.

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