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Publication numberUS3304756 A
Publication typeGrant
Publication dateFeb 21, 1967
Filing dateNov 23, 1964
Priority dateNov 23, 1964
Publication numberUS 3304756 A, US 3304756A, US-A-3304756, US3304756 A, US3304756A
InventorsEads Charles L
Original AssigneeAdams Rite Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lock position indicator
US 3304756 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 21, 1967 c, s 3,304,756

LOCK POSITION INDICATOR Filed Nov. 25, 1964 far/Es L. 500 3,


WHANN 8 McMAN/GAL A lorneys for li o alkali) by Eli W.w m

United States Patent Ofiice 3,364,756 Patented Feb. 21, 1967 3,304,756 LOCK POSITION INDICATOR Charles L. Earls, Palm Springs, Calif., assignor to Adams Rite Manufacturing Company, Glendale, Calif., a corporation of California Filed Nov. 23, 1964, Ser. No. 413,095 Claims. (Cl. 70-432) The present invention relates generally to lock mechanisms of the type utilized for doors having a hollow narrow stile frame structure within which the lock mechanism is mounted; and is more particularly concerned with improved means for visually indicating whether the lock mechanism is in a locked or unlocked position.

In the interest of occupants safety, current building codes have prohibited the use of flush bolts orsurface bolts, Security is, however, obtainable under the code which permits use of key controlled locking devices, provided, these locking devices are of a type that will be readily distinguishable as locked. Having the foregoing code limitations in mind, the present invention has for an object an improved lock position indicator for a key controlled lock which will visually apprise occupants as to whether the lock is in locked or unlocked position.

Another object of the invention is to provide a simple, dependable indicating mechanism of pleasing appearance, which can be mounted on the exterior surface of a door stile and connected to an existing lock mechanism with a minimum change or modification.

Further objects of invention will be brought out in the following part of the specification, wherein detailed description is for the purpose of fully disclosing the invention without placing limitations thereon.

Referring to the accompanying drawings, which are for illustrative purposes only:

FIG. 1 is a fragmentary side elevational view of a door stile frame member showing the cooperative relationship between the controlled lock mechanism and the position indicator of the present invention;

FIG. 2 is a fragmentary edge view of the door stile in which portions have been cut away to show details of construction relative to the inter connecting means be tween the lock mechanism and the indicator;

FIG. 3 is a transverse sectional view taken substantially on line 33 of FIG. 2;

FIG. 4 is a reduced fragmentary section taken substantially on line 44 of FIG. 2;

FIG. 5 is a fragmentary detailed sectional view, taken substantially on line 55 of FIG. 2; and

FIG. 6 is a fragmentary detailed view showing certain parts of the indicator member.

Referring more specifically to the drawings, for illustrative purposes, there is disclosed in FIG. 1 an extruded narrow stile portion 10 as used in a door frame and within which there is mounted a lock mechanism which is under the control of a key-cylinder assembly 11. Adjacent to, and as shown as being surface mounted on the stile frame member directly below the key-cylinder assembly is a lock position indicator, as generally indicated by the numeral 12, embodying the features of the present invention.

It is within the contemplation of the broad concepts of the present invention that the lock position indicator may be utilized with different types of lock mechanisms. However, in order that the invention may be more clearly understood, for purposes of illustration, the indicator mechanism is operatively associated herein with a lock mechanism having a construction such as disclosed in my previously issued Patent No. 2,989,859, dated June 27, 1961, and entitled Narrow Stile Double Bolt Door Lock.

Briefly, the lock mechanism comprises key controlled actuating means (not disclosed) which is operatively coupled with a swingable bolt structure 13. This bolt is supported between lock casing side frames 14 and 15 on a pivot 16 for movement to locked and unlocked positions.

In the unlocked position, the bolt 13 is retracted into and extends longitudinally of the stile member 10, while in the locked position, the bolt is in an extending projecting position as shown in FIG. 1, wherein it extends at right angles to the longitudinal axis of the stile and projects through a slot 17 of a face plate 18 which is re tained by mounting screws 1919.

The swingable bolt 13 of the lock mechanism, as shown in FIG. 4, is operatively connected with a reciprocably mounted floor bolt structure, as generally indicated by the numeral 19. This structure contains a plate member 20 which carries at its upper end a right angled projection 21 which is adapted to extend into a slot portion of the bolt, this projection being fitted with a transversely extending pin 22. The pin 22 has each of its opposite ends positioned in a radially extending slot 23 formed on each side of the bolt. This slot and pin connection operates to reciprocate the floor bolt in a linear direction. Likewise, the pin 22 will have a linear translatory movement as the bolt 13 is moved between locked and unlocked positions. The pin 22 is extended so as to project through an opening 24 in the adjacent wall of the stile member 10, so that the movement of this pin during lock actuation may be utilized as an actuating element for the lock position indicator which will now be described in detail.

The lock position indicator 12 comprises a hollow housing 25 which is closed at its upper and lower ends, mounting screws 2626 being provided for securing the housing in mounted position. The housing is of elongate rectangular configuration, and on its front side is provided with an elongate viewing opening or window 27. Rearwardly the housing is open.

Within the housing there is rotatably mounted an elongate generally cylindrical indicating member 28 which is arranged with right angled indica bearing planar areas 29 and 30 which may be selectively disposed in viewing positions through the window 27. These areas may respectively carry such indicia as Open and Locked to indicate the position of the lock mechanism.

The indicating member 28 is rotatably supported by upper and lower projecting pivots 31 and 32 respectively, these pivots being arranged to laterally bear against interior bearing shoulders 33 and 34, the shoulder in each case being provided with an ancuate notch 35 to receive the associated pivot. The pivots are retained in mounted position by means of a retainer member 36 which serves to close the rear side of the housing and hold the pivots in operating position, the retainer member having end portions 37 and 38 which bear against the associated pivot in each case as shown in FIG. 5. The retainer also is provided with an opening 39 which registers with the opening 24 to permit passage of the outermost end of pin 22 into the housing 25.

In order that the translatory movement of the pin 22 may be transmitted into rotary motion of the indicating member 28, the surface of the indicating member is provided with a slot 40 which is spiraled about the longitu dinal axis of rotation of the indicating member. The slot has end terminations in -degree angular relation so that when the end of the pin 22 is moved between its reciprocable limits corresponding to the locked and unlocked positions of the bolt 13,'the indicating member will be rotated through an angle of 90 degrees to re spectively display the proper indicia bearing area 29 and 30 in the opening or window 27 so as to indicate the lock position.

With the locked position indicator as herein described and its combination with the lock mechanism, full security is obtained through the key assembly control 11, while at the same time a visible indication of the lock position is shown at all times.

Various modifications may suggest themselves to those skilled in the art without departing from the spirit of my invention, and, hence, I do not wish to be restricted to the specific form shown or uses mentioned, except to the extent indicated in the appended claims.

I claim:

1. A surface mountable indicator mechanism for a door lock, comprising:

(a) an elongate hollow housing for mounting adjacent said lock, said housing having an open back and a front viewing opening therein;

(b) bearing shoulders in said housing positioned respectively on opposite ends of said viewing opening;

() an elongate indicator member in said housing having end pivots respectively laterally engaged with said bearing shoulders and supporting the indicator member for rotational movement, said indicator member having longitudinally extending adjacent indicia bearing surface areas;

(d) a closure for the open back of the housing having parts engaged with said pivots to retain them against said shoulders when the housing is surface mounted;


(e) motion transmitting means, connectable between said indicator member and a movable part of said lock, for rotating said member to positions respectively placing said indicia bearing surfaces in said viewing opening in accordance with the actuation of the lock to a locked and an unlocked condition.

2. A surface mountable lock position indicator mechanism, comprising:

(a) a hollow housing adapted to be mounted in an upright position on a side wall surface of a door stile containing a locking mechanism therein, said housing being open rearwardly and having a front viewing opening therein;

(b) an elongate generally cylindrical indicator member in said housing having end pivots mounting it operative in bearing structures at the top and bottom of the housing to support the indicating member for rotation, said member including longitudinally extending adjacent indicia bearing surface areas positioned on one side of its axis of rotation;

(c) a surface groove on said member extending spirally of said axis of rotation on the opposite side from said indicia bearing surface areas; and

(d) a laterally reciprocable member operable by a movable part of said lock between limits corresponding to locked and unlocked positions of the locking mechanism, said reciprocable member extending into the rear of said housing and having an end portion movable in said groove, whereby said indicator member is rotated to positions respectively placing said indicia bearing surfaces in said viewing opening in accordance with the actuation of the lock to a locked and an unlocked" position.

3. A surface mountable lock position indicator mechanism, comprising:

(a) an elongate hollow housing having a front viewing opening therein; (b) a rotatably mounted elongate indicator member in said housing having end pivots removably retained 5 against bearing shoulders at the ends of said housing,

said indicator member having longitudinally extending adjacent indicia bearing surface areas;

(c) a spiraled surface groove on said member having its ends terminating at circumferentially spaced radial points in right-angled relation; and

(d) a pin supported for linear movements by a movable part of said lock in a path parallel to said axis, said pin having an end positioned in said groove and operating to actuate said member to positions at said points respectively placing said indicia bearing surfaces in said viewing opening in accordance with the actuation of the lock to a locked and an unlocked condition.

4. A lock position indicator according to claim 3, wherein the housing is open at its rear side, and the end pivots of the indicator member are respectively held against their associated bearing shoulders by a retainer member positioned in said open rear side of the housing.

5. The combination comprising:

(a) a key actuated lock structure mounted in a hollow door stile and including a bolt selectively movable to locked and unlocked positions;

(b) an element connected for unitary movement with said both and having a linear path of movement between limits corresponding to said locked and unlocked positions, said element having an end projecting through a side wall of the door stile;

(c) an elongate indicator member supported on an outside surface of the side wall by end bearing means providing an axis of rotation extending parallel to the path of movement of said element, said indicator member having longitudinally extending adjacently positioned indicia bearing surface areas; and

(d) a surface groove on said indicator member longitudinally spiraled about said axis of rotation, and slidingly receiving the projecting end of said element therein, whereby said indicia bearing surfaces will be selectively moved to an indicating position in accordance with the actuation of the lock to a locked and an unlocked condition.

References Cited by the Examiner UNITED STATES PATENTS FOREIGN PATENTS 7/1906 Great Britain.

EDWARD C. ALLEN, Primary Examiner.

P. TEITELBAUM, Assistant Examiner,

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US455457 *Sep 22, 1890Jul 7, 1891 Box frame and cover
US1066664 *Dec 2, 1912Jul 8, 1913D Senior KaropIndicator-lock.
US1445444 *Jul 29, 1921Feb 13, 1923Auto Kontrol Lock CorpIndicating lock
US1516057 *Oct 26, 1921Nov 18, 1924 It office
US1898127 *Oct 27, 1926Feb 21, 1933Oakes Prod CorpAutomobile lock
US2227803 *Jun 25, 1938Jan 7, 1941Lyon Metal Products IncLocker wardrobe
US2989859 *Aug 29, 1958Jun 27, 1961Adams Rite Mfg CompanyNarrow stile double bolt door lock
GB190616268A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6357806 *Oct 29, 1999Mar 19, 2002Jamco CorporationDoor latch device
US6938445 *Mar 26, 2003Sep 6, 2005Sargent Manufacturing CompanyMortise lock status indicator
US20130307279 *Sep 27, 2011Nov 21, 2013Zodiac Seats FranceTriple-detection double-locking paddle
U.S. Classification70/432, 116/80, 70/379.00R
International ClassificationE05B41/00
Cooperative ClassificationE05B41/00
European ClassificationE05B41/00