US2314488A - Tubular latch - Google Patents

Description

March 23, 1943. F. H. FELLO'WS 4 2,314,488

TUBULAR- LATCH Filed oct. V1o, 1939 sheets-sheet 1 ATTORNEY March 23, 1943.

F. H.v FELLOWS TUBULAR LATCH Filed ot. 1o, 1959 s sheets-sheet 2 BY/MM ATTORNEY March 23, 1943'. F. H.r FELLows 2,314,488

TUBULAR LATCH f Filed oct. 1o, 1939 3 sheets-sheet ATTRNEY BWM Patented Mar. 23, 1943 TUBULAR LATCH Fred H. Fellows, North Chicago, Ill., assigner to The Yale & Towne Manufacturing Company, Stamford, Conn., a corporation of Connecticut Application October 10, 1939, Serial No. 298,731

8 Claims. (Cl. 292-169) This invention relates to a latch of the tubular type in which the latch and its operating mechanism are adapted for mounting in bores formed in a door.

Latches of the general type disclosed in this application are old and well known in the art, my invention being directed to an improved form of latch whereby certain desirable results are obtained with a minimum of mechanism, and whereby the latch may be readily mounted on a door.

More particularly, my invention embodies a latch mechanism in which a locking or push piece is assembled with the latch mechanism within a latch casing, the push .piece having a push button secured thereto and extending out of the casing and adapted to protrude through an opening in a suitable inside rose or escutcheon plate in offset and parallel relation to inside and outside operated spindles. Normally, the latch bolt may be retracted by both inside and outside operated bolt retracting mechanism through rotation of the spindles. By movement of the push piece through pressure exerted against its push button, the latch bolt is lockedA against retraction from the outside. Retraction of the latch bolt thereafter as when the door is shut, or by rotation of the inside knob and the inside spindle, acts to move the push piece out of locking relation to the outside operated latch bolt retracting mechanism. f

The novel latch mechanism of my invention makes it possible to obtain this operation While utilizing a conventional type of solid spindle and conventional types of knobs and roses, whereas heretofore it has been necessary, in order to obtain the operations of my invention, to use sleeve spindles and knobs formed with central bores and openings. It is possible with my lock, therefore, to employ the usual trim; that is, roses and knobs which are desired in the art because adapted to certain traditional styles of architecture.

My invention incorporates, of course, additional featureswhich are of exceeding importance, such as the particular construction of the lock casing, the mounting of the retracting rollbacks, and the latch bolt retracting member, and the control of the push button and its push piece, all of which will be set forth hereinafter.y Referring now to the drawings, Fig. 1 is a horizont'al section through a door and latch showing the application of my latch to a door. Fig. 2 is a section taken along lines 2 2 of Fig. l. Fig. 3

is an enlarged view of the latch of Fig. 1l showing the outside rollback locked against rotation. Fig. 4 is a section taken along lines 4 4 of Fig. 3, while Fig. 5 is a section taken along lines 5 5 of Fig. 4. Fig. 6 is a view taken along lines 6 6 of Fig. 5, while Figs. 7 and 8 are sections taken along lines 'I 'I and 8 8 of Fig. 6. Fig. 9 is a View taken along lines 9 9 of Fig. 6. Fig. l0 is an elevation showing the inside rose in position on the door, with the knob indicated in phantom lines.

Referring now more particularly to the drawings, my latch mechanism utilizes a latch bolt housing I0 and a latch housing II. Mounted within the latch bolt housing It is a latch bolt I2 projected by a spring I3 and having a tail piece I4 which is slotted as at I5 for cooperation with the finger I6 of a latch bolt retracting member Il mounted in the latch housing I I.

The latch housing II is formed of two end plates I8 and I9 which are maintained assembled by a cylindrical plate member 20 through overlapping lugs 2| formed on the cylindrical member 2l), as best shown in Figs. 2 and 6. Riveted to rthe cylindrical plate member 20 and extending within the housing II is a pin 22 about which is mounted a spring 23 which presses against the plate 24 of the bolt retracting member I'I. The bolt retracting member I1 is thus spring projected outwardly relatively to the casing and is supported by the pin 22 for retractive movement inwardly of the casing. The cylindrical plate member 20 is cut away leaving a space dened by upper and lower guide surfaces 25, as is best shown in Figs. 2, 5 and 8. In addition, each of the end plates has bent over guide portions fitting into the space between surfaces 25, and

' provided for the lock housing II, and is riveted at 21 to a rollback 28. The rollback 28 has a struck up portion 29 which cooperates with the plate 24 of the latch retracting member 'I for retracting the said member II against the pressure of thespring 23 whenever the spindle 26 is rotated.

A thimble 30 is secured between a shoulder 3l of the'spindle 26 and the rollback 28, and is so formed as to limit the movement of the spindle and its rollback axially into the latch housing I I. It is thus seen that the spindle 28 is secured in assembled relation to the rollback 28 for rotation with that rollback relatively to the housing I l.

figures.

The outside spindle 32 is similarly secured to a rollback 33 which is cooperable also with the plate 24 of latch retracting member i1 to retract the latch bolt. Rollback 33 is notched at 34 for cooperation with a locking portion 35 of a locking push piece 33. This locking push piece 33 is guided by plates 31 and 38 secured to the end plates I8 and I9 of the casing through the lugs 21, as best shown in Fig. 6. A spring 33 operates between the plate 38 and a push button 40 secured to push piece 36, tending to press the button 43 and push piece 33 outwardly from the position of Fig. 3 to the position of Fig. 1.

It will be noted that in Fig. 3, the surface 35 of the locking push piece 33 is within the notch 34 of the rollback 33, thus preventing rotation of the rollback. At the same time, it will be noticed that the surface 35 is positioned just beyond the struck up lug 4| formed on the retracting member Il. Since spring 23 is obviously more powerful than spring 39, the locking push piece 33 will be prevented by lug 4I from moving outwardly under the pressure of spring 33 from its positie-n of Fig. 3 to its unlocking position of Fig. 1. 1f the inside spindle 23 be rotated to retract the latch bolt by retracting movement of the member ll, the lug 4| will be moved away from obstructing relation to the locking surface 35` of the push piece 36, and the push piece 36 will spring outwardly under the influence of spring 33 to the release position of Fig. 1.

The spindles 26 and 32 are of a conventional threaded design adapted for use with standard knobs, such as those designated by reference numerals 42 and 43 in Fig. l. The inside knob 42 is secured to the spindle 23 by any conventional means, usually a screw, such, for example, as the screw 44 driven in to cooperate with one of the at surfaces of the spindle 23. The knob 43 may be similarly secured, as will be readily appreciated.

For supporting the knobs 42 and 43 for rotation, there are employed roses of the standard type well known in the art and designated by reference numerals 45 and 4S in the several The inside knob rose '45 has formed therein an opening 41 through which protrudes the push button 43, the relation of which to the knob 42 is probably best illustrated in Figs. 1 and 10.

For securing the latchhousing Il to the wood of the door, the inside plate i8 of the housing is formed with ears 49 having holes 56 through which screws may be passed into the door, as will be readily appreciated by those skilled in the art. It will also be well appreciated that when the latch bolt retracting member I'I is fully retracted by either of the knobs, it will lie entirely within the bore I of the door to facili-tate assembly.

The latch retracting member I1 is formed of a pair of spaced plate- like members 52 and 53 which, as illustrated in Fig. 2, are riveted at 54 to the plate 24 wherebythe latch retracting member ll is retracted by the inside and outside rollbacks 29 and 33. At the outer end of the latch retracting member, the two plate-like members 52V and 53 are connected by a vertical bar 55 from which protrudes the finger l5 already described. The guide surfaces of the casing l! earlier described, and the notched portions IBa and I 9a of the casing end plates lil and i9, cooperate with the spaced portions of the latch retracting member Il to guide it for proper movement relatively to the latch casing, all as is best seen in Figs. 2,

5 and 8.

In assembling the latch on the door, I follow the procedure of irst inserting the latch bolt housing I6 into the endwise bore 53 of the door, and then inserting the latch housing l l intotlie bore 5I of the door, the finger 3 being moved into the slot l5 of the latch bolt tail i4 to unite the two, as illustrated in Fig. 1.

As has already been described, a rotation of the inside knob and the inside rollback 23 will retract the latch retracting member Il, and will eilect the release of the outside knob, spindle and rollback, if they have previously been locked by the locking push piece 33. This release is caused by withdrawing the lug il of the retracting member l1 from holding relation to the surface 35 of the push piece 3?. The same releasing action is obtained should the door be closed with the outside knob locked against rotation.

in such a case, the latch bolt I2 will be retracted until the surface lila at one end of the slot l5 contacts the finger Iii of the latch retracting member ll. 'I'he latch retracting member Il will be caused to move rearwardly, moving the lug 4l away from behind surface 35 of the push piece 36. The push piece 3G will then be moved outwardly by spring 33 into its release position of Fig. 1. It is thus seen that my outside` knob may be locked from the inside by the depression of the push button, and maintained locked until the inside knob is rotated or the latch bolt is retracted as when the door is shut.

The operation of my invention will undoubtedly be now quite clear to those skilled in the art.

I now claim:

1. In a lock of the class described, a cylindrical casing having circular end plates, a spring pressed latch bolt retracting member in said casing, a spring pressed latch bo-lt, means or connection between said latch bolt and member whereby retraction of said member retracts also said latch bolt, an inside rollback and an outside rollback for retracting said latch bolt retracting member, an inside spindle secured to said inside rollback and extending outwardly of said casing through one of said end plates, an outside spindle secured to said outside rollback and extending outwardly of said casing through the other of said end plates, a push piece in said casing and extending outwardly therefrom through the first of said end plates and terminating in a push button, a

`spring pressing between the said end plate and a portion of said push piece which is out of said casing for yieldingly maintaining said push button outwardly relatively to said casing, means whereby said push piece when depressed inwardly of said casing and against said spring locks said outside rollback against rotation, a surface oi said latch bolt retracting member retaining said push piece depressed whereby the retraction ci said member as by the rotation of the inside spindle, and its rollback releases said push piece for outward spring pressed movement to release said outside rollback, and means whereby retraction of said latch bolt independently of said member `also releases said push piecefor outward movement.

2.111 a lock of the class described, a casing having a cylindrical portion and a pair of end plates, a rotatable inside rollback 'in said casing, a solid spindle for rotating said rollback project-- ing through one of said end plates, a rotatable outside rollback in said casing, a solid spindle for rotating said rollback projecting through the other of said end rpiates, a spring projected retracting member in said casing retracted by rotacasing at the other end for the mounting of knobs tion of either of said rollbacks by said spindles, fa push piece, bearing means on said end plates whereby vsaid push piece is supported for sliding movement relatively to said casing in offset parallel relation to said spindles, a portion of said push piece projecting beyond each of said end plates, a spring between one end plate and a projecting portion at one end of said push piece for pressing said push piece relatively to said casing and into release position, a push button whereby said push piece is depressed against said spring into locking position, a detent portionron said push vpiece cooperable with a portion of said retracting member whereby when said retracting member is projected by its spring, it maintains.

said push piece depressed against its spring relatively to said casing once said push piece is so depressed, said outside rollback having a notch into which a portion of said push piece enters when said push piece is depressed whereby to lock said outside rollback against rotation while leaving said inside rollback free for rotation, the retraction of said retracting member thereafter as by said inside rollback, releasing said push piece for projection by its spring to release the outside rollback for rotation.

3. In a door latch, a casing insertible into an opening formed in a door, a latch bolt retracting member mounted for reciprocation in said casing, inside and outside rollbacks in said casing, inside and outside knobs, independently rotated spindle sections, one of which is secured to one of said rollbacks while the other is secured to the other of said rollbacks, each of said spindle sections supporting one of said knobs, a clogging member movably mounted transversely on the casing and disposed forwardly of and parallel to said spindle sections and having means preventing operation of said retracting member by one of said knobs and its rollback, and means integrally formed with said bolt retracting member adapted to engage said clogging member to hold the same in dogging position.

4. In a door latch, a casing insertible into a opening formed in a door, a latch bolt retracting member mounted for reciprocation in said casing, inside and outside rollbacks in said casing, inside and outside knobs, independently rotated spindle sections, one of which is secured to one of said rollbacks while the other is secured to the other of said rollbacks, each of said spindle sections supporting one of said knobs, a dogging unemsber moya-bly mounted on the casing and disposed forwardly of and parallel to said spindle sections and having means preventing operation of said retracting member by one of said knobs and its rollback, a spring pressing against said clogging member and yieldingly urging it out of dogging position, and means integrally -formed with said bolt retracting member adapted to enga-ge said dogging member to hold the same in dogging position, the movement of said bolt retreating-member in a bolt retracting direction releasing'said clogging member -for movement by said spring out of dogging position.

5. In a lock of the class described, a cylndrical casing having circular end plates, a latch bolt retractor in said casing, a spring normally projecting ysaid retractor outwardly relatively to said casing,

inside and outside rollbacks in said casing, inside and outside actuated spindles rotatable independently of one another for actuating said rollbacks to retract said latch bolt retractor, said spindles being secured at one end to said roll-backs and projecting through said end plates and out of the (5 thereon, a push piece in said casing oiset and parallel to said spindles and entirely outside said spindles, said push Ipiece having a portion extending outwardly of said casing in the form of a button, said button and push piece extending from said casing in spaced parallel relation to said inside and outside spindles, a spring tending noranally to lurge said push piece outwardly relatively to said casing and into release position, said push piece being movable inwardly of said casing against said spring pressure by application of .pressure against said push button, means whereby when said push piece is in said inward position it locks the outside actuated spindle and rollback against rotation while leaving the inside spindle and rollback -free for rotation, and rmeans whereby said latch bolt retractor retains said push piece in its inward position when said latch bolt retractor is projected and releases said push piece for projection by its spring when said latch bolt retractor is retracted.

6. In a look of the class described, a cylindrical casing having circular end plates, a spring pressed latch lbolt retracting member in said casing, a spring pressed latch bolt, means of connection between said latch bolt and member whereby retraction of said member retracts also said latch bolt, an inside rollback and an outside rollback in said casing for retracting said latch bolt retracting member, an inside spindle secured to said inside rollback and extending outwardly of said casing through one of said end plates, an outside spindle secured to said outside roll-back and exo tending outwardly of said casing through the other of said end plates, a push piece in said cas ing and extending outwardly therefrom through the first of said end plates and terminating in a push button, a spring pressing between the said end plate and a portion of said push piece which is out of said casing for yieldingly maintaining said push button outwardly relatively to said casing, means whereby said push piece when depressed inwardly of said casing and against said spring locks said outside rollback against rotation, a surface on said latch bolt retracting member for retaining said push piece depressed in said casing, the retraction of said member as by the rotation of the inside spindle and its rollback releasing said push piece for outward spring pressed movement to release said outside rollback.

7. In a lock of the class described, a casing, a spring projected latch bolt, inside and outside rollbacks in said casing, inside and outside actuated spindles each connected at one end to one of said rollbacks yfor rotating said rollbacks to retract said latch .bolt and extending outwardly of the casing at their other ends for the mounting of knobs thereon, a push piece in said casing offset and parallel to said spindles and entirely outside said spindles, said push piece having a portion extending outwardly of said casing in the form of a button in spaced parallel relation to the inside spindle, a rose through which said but- 'ton protrudes on the inside of said lock when it is secured to the door, a spring tending normally to urge said push piece outwardly of said casing and into release position. said push piece being movable inwardly of said casing against said spring pressure by application of pressure against said push button, retaining means movable with said latch bolt when it is retracted for yieldingly retaining said push piece in said inward position when said latch bolt is projected, means whereby when said push piece is in said inward position it locks the outside actuated spindle and rollback against rotation while leaving the inside spindle and rollback free for rotation, the retraction of said latch bolt by rotation of said inside actuated spindle moving said yretaining means to release said push piece whereupon said push piece is pressed outwardly by .its spring and releases said outside actuated spindle and rollback. Y

8. In a lock of the class described, a casing, a latch bolt retracting member, an inside rollback and an outside rollback in said casing for retracting said latch bolt retracting member, .inside and outside spindles for said rollbacks extending outwardly of said casing, a push piece entirely outside said spindles guided in said casing in off- 15 set and parallel relation to said spindles and extending outwardly .of said casing in spaced relation to said spindles and terminating in a. push button, means whereby said .push piece when depressed inwardly of said casing locks said outside rollback against rotation, means cooperating with a .portion of said `lpush piece for retaining it in locking relation to said rollback once said push piece is depressed inwardly of said casing, and means whereby the retraction of said latch bolt thereafter independently of said outside rollback ef- .fects the movement of said push piece from its depressed position.

FRED H. FELLOWS.

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