US1071657A - Electrically-controlled lock. - Google Patents

Description

H. G. VOIGHT.

ELECTRIGALLY CONTROLLED LOCK. APPLICATION FILED APR.5, 1913.

1,071,657, Patented Aug.26, 1913.

3 SHBETSSHEET 1.

Ezgiwi/iwvwwz awn tom COLUMBIA PLANDGRAPH co., WASHINGTON. D. c.

H. G. VOIGHT. ELEGTRIOALLY CONTROLLED LOOK. APPLICATION FILED Alum, 1913.

3 SHEETSSHEET 2.

ammo/41km Haw/ear Patented Aug. 26, 1913.

H. G, VOIGHT.

ELEGTRIGALLY CONTROLLED LOOK.

APPLICATION FILED APR.5, 1913.

Patented Aug. '26, 1913.

3 SHEETS-SHEET 3.

COLUMBIA PLANDORAPH COqWASHINGTON, D. C.

HENRY G. VOIGHT, OF NEW BRITAIN, CONNECTICUT.

ELECTRICALLY-CONTROLLED LOCK.

Specification of Letters Patent.

Application filed April 5, 1913.

Patented Aug. 26,1913.

Serial No. 759,183.

To all whom it may concern 7 blocked. Such an instance is seen in the case of looks as applied to the corridor doors in hotels. A guest with valuables displayedin his room may desire to leave his room with such valuables on display and to lock the uoor against opening by any one without authority. To this end I have devised blocking means for a lock of this type, which means are under electric control and may be operated from a distant point, as the hotel ofiice, to block the retraction of the bolt which has previously been projected by the occupant of the room on leavlng, the door being then locked against all save one special key. These and other advantages w ill be apparent from the more detailed description following, taken in connection with the ac-. companying drawings forming part thereof and illustrating one embodiment of the invention.

In these drawings: Figure 1 is a view in elevation of a lock embodyin the present invention, the cover plate of t e lock casing being removed and certain of the usual parts of the mechanism being omitted, and the electrically controlled blocking means being shown in latched or inoperative position. Fig. 2 is a View in end elevation of the lock mechanism shown in Fig. 1, part of the lock casing being broken away to disclose the interior arrangement. Fig. 3 is a fragmentary view in elevation of the interior of the lock case, the blocking means being shown in operative or unlatched position. Fig. 4 is a detail of the dead bolt. Fig. 5 is afragmentary View of the interior of the lock case showing in detail the electric control. Fig. 6 is a fragmentary vertical sectional View through the lock case showing in elevation the parts disclosed in Fig. 5. Fig. 7 is a top plan View of the parts shown in Fig. 5 with the upper face of the lock case broken away to disclose the interior arrangement. Fig. 8 is a detail View of the latching armature. Fig. 9 shows in side and end elevation the armature-controlled blocking dog.

Referring to the drawings by numerals, 1 indicates a lock case and 2 the face plate thereof. At 3 I have indicated the opening in the case for the knob-controlled roll-back which cooperates with any suitable form of latch bolt and dogging or night latch mechanism. As these, specifically, form no part of the present invention, I have not deemed it necessary to illustrate the same.

4 indicates a dead bolt suitably guided in the lock case and having its upper edge notched as at 5 to receive the usual offset of a tumbler 9 of the spring pressed type, pivotally mounted on a stud 6 and gated as usual. The dead bolt is provided with an extension 7 at its lower edge provided with an elongated slot 8 therein. A sliding plate 10 carries a pin on its under face which enters in the slot 8 and has a pivot stud 11 adjacent its upper end and a lower horizontally extending arm 12 arranged in parallel with the dead bolt. The upper edge of this horizontal extension is provided with a series of pms 13 formlng a rack. A second tumbler 14 of the usual spring-pressed type, gated as usual, is mountedon the. pivot stud 1 1 and is provided at its lower end with a horizontally extending arm 15 positioned adjacent the rack pins 13 ofthe plate 10. The plate 10 forms in effect an operative part of the dead bolt 4 and cooperates therewith to project said bolt, this plate being actuated by means of a thumb turn mechanism hereinafter described. Both of the tumblers 9 and 14 are gated to coiiperate with a fixed fence 26, the tumbler 14 acting as an emergency tumbler. This tumbler is provided with means adapted upon depression of said tumbler to cooperate with the tumbler 9 and depress that tumbler also, as is known in the art, the tumbler 9 being depressible, however, independently of the second or emergency tumbler 14.

The thumb turn mechanism referred to may comprise the thumb turn hub '16 carrying, to rotate therewith, a toothed quadrant 17 located in the plane of the rack pins 13 and a roll-back arm 18 located in the plane of the arm 15 of the tumbler 14. When thus hub 16 is rotated. by a suitable T- piece, or thumb turn (not shown), the emergency tumbler and the primary tumbler will at 19, and the lower end of a link 20 is pivoted thereto, the upper end of this link being slotted as at 21 and being guided upon a pin 22 suitably secured to the lock case.

23 designates the barrel of a cylinder lock mechanism carrying a roll-back or cam 24: positioned in the plane of the offset of the primary tumbler 9 and adapted to operate said tumbler mechanism and to project and retract the dead bolt. This roll-back is controlled by a series of keys which are, of course, arranged to cooperate with the tumbler mechanism of the lock. 25 designates a second. roll-back or cam member arranged in a different plane from the rollback 241 and operated by one special key bitted to operate the tumbler mechanism and of greater length than the other key or keys of the series so that this long key may engage the lower end of the second rollback 25 and move it relatively to the firstroll-back and to the barrel of the cylinder lock. A spring normally holds this second roll-back in a plane where it will not engage the second tumbler 14; when the roll-back is operated, but when the special or long key is used, this position of the second rollback is changed and it is moved to a position where it will rotate in an arc intersecting the tumbler 14 and operating said tumbler and its slide 10 to project and retract the dead bolt independently of the first roll-back and of the thumb turn mechanism.

I have only briefly described these parts of the lock mechanism, as specifically they form no part of the present invention and are the subject-matter of my pending application Serial No. 755,101, filed March 18th, 1913. The present invention is not limited to this specific structure, but is particularly adapted to the general combination of elements which are heretofore described.

It will be evident from the foregoing description that the dead bolt 4 may be projected and retracted through the roll-back 24 and a series of keys, and may be projected from the interior through the thumb turn mechanism and the co operating tumbler 14: and slide 10 to dead lock the bolt against retraction from the exterior through any of the aforesaid series of keys operating the roll-back 24c alone. The special or long key operates the tumbler 14 from the exterior of the door to retract the latch bolt when projected by the thumb turn from the interior. In combination with this general type of look I have provided means under electric control and operable from the exterior of the room and, if desired,from a distant point, whereby the dead bolt may be projected and may be blocked against retraction by any of the series of keys operating the roll-back 24 only, this blocking means being rendered inoperative, however, through the special or long key and second roll-back 25 to permit the retraction of said dead bolt. To that end I have provided the following structure: The dead bolt t is provided with a shoulder 27 in its upper edge. Cooperating with this shoulder is a locking dog 28 pivoted adjacent one end as at 29 to the lock case and provided at its forward end with a lateral offset 31 whose forward upper edge is beveled and extends beyond the forward edge of the body of the dog. At its lower forward edge and within the edge of the body of the dog is a lateral offset lug 30. Acoiled spring 32 is suitably mounted on the lock case in the plane of the body of the dog 28 and has its free end bearing against said dog adjacent its forward upper edge so that said spring normally tends to position said dog with its offset lug 30 moved downwardly in the plane of and to the rear of the abutment shoulder 28 of the dead bolt. The rear end of the dog 28 is beveled and is positioned to lie within the are of movement of the second roll back 25 when the latter has been moved out wardly by this special key so that it will be evident that through said key and said second roll-back 25 therear end of the dog may be engaged and its forward end with its blocking lug 30 lifted out of the path of bolt retraction. Mounted within the lock casing and suitably insulated therefrom are a pair of electro-magnets 33 having eonnecting wires 34; 35 in circuit with a suitable source of electric current, said circuit containing a circuit closer which may be located in the office of the hotel, for instance. Cooperating with these electro-magnets is what I will term a latching armature 36 having hinging pins 37 at its opposite ends by means of which it is suitably hinged to the lockcasing. Adjacent its lower outer or free edge this armature 36 is provided with a latching window 38 which is positioned in the line of the beveled edge 31 of the latching dog when the latter is raised, and is adapted to receive said forward beveled edge of the offset 31 (see Figs. 1 and to normally hold said blocking dog in raised inoperative position. The lower edge of the armature, when not attracted by its electromagnets, is positioned to rest above this forward beveled edge of the dropped or unlatched blocking dog. Suitable means, as a coiled spring 39, normally tends to hold this armature out of contact with the electromagnets, as is usual.

WVith the structure described in mind, the manner of controlling the locks is as follows:'Let us suppose that the occupant of the room has left the room and has projected the deadbolt 4: by means of the guest key, the parts of the lock before projection being in the position shown in Fig. 1 of the drawings. The person in authority, as, for instance, the hotel clerk or manager on being requested to dead lock the bolt in the guests room then operates the appropriate circuit closer, the electro-magnets 33 are energized, attracting the latching armature 36, moving the same away from holding engagement with the forward beveled edge 31 of the blocking dog. The coiled spring 32 will then force the dog downwardly to bring its blocking lug 30 in the rear of the shoulder 28 of the dead bolt (see Fig. It will be obvious that in this position retraction of the dead bolt through any of the keys of the series which operate the roll-back 24 only is prevented inasmuch as the blocking dog 28 lies in a different plane from the rollback 24, and inasmuch as the keys of this series cannot operate the second roll-back 25 to position it to engage the rear end of its blocking dog. Some person in authority, however, with the long key may rotate the same to engage said rear end, the beveled forward edge 31 of the dog riding up over the lower edge of the latching armature 36 and forcing the same inwardly against its spring 39 until said edge 31 has cleared and is in alinement with the latching window 38 of said armature, whereupon the spring 39 will snap these two parts in engagement and hold the blocking dog thus inoperatively positioned until the electro-magnet is again energized. Continued rot.tion of the roll back 25, and, of course, of the first roll-back 24 which rotates therewith, will then retract the dead bolt and the guest may then enter his apartment. v

I have herein referred to a specific form of dead bolt and thumb turn mechanism and of cylinder lock mechanism cooperating therewith, but desire it understood that the present invention is not limited to cooperation with these specific forms, but may be embodied in connection with any form of lock of the same general type or of similar types wherein the essential elements of control exist, and especially the two key-controlled mechanisms typified by the roll-backs 2st and 25. It will also be obvious that the invention is not limited to the specific form of electric controlling mechanism herein clescribed, but that the same may be varied structurally and in relative arrangement of parts within the spirit of the invention and the scope of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In a look, a dead bolt, means controlled by a plurality of keys for projecting and retracting said dead bolt, means under electric control for blocking the retraction of said bolt through certain of said,

plurality of keys, and means controlled and operable by one certain key of said plurality of keys to render said blocking means inoperative.

2. In a lock, a dead bolt, key-controlled means for projecting and retracting the same, means under electric control for blocking the retraction of said bolt through said. key-controlled means, and other key-controlled means for rendering said blocking means inoperative and for retracting said bolt.

3. In a lock, a dead bolt, key-controlled means for projecting and retracting the same, movable means normally tending to block the retraction through said key-controlled means of said dead bolt when projected, means for holding said blocking means in inoperative position, means under electric control fOr operating said holding means to release said blocking means, and other key-controlled means arranged to inoperatively position said blocking means.

4. In a look, a dead bolt, key-controlled means for projecting and retracting the same, movable means normally tending to block the retraction through said key-controlled means of said dead bolt when projected, means for holding said blocking means in inoperative position, means under electric control for operating said holding means to release said blocking means, and other key-controlled means arranged to inoperatively position said blocking means and to retract said bolt.

5. In a look, a dead bolt, key-controlled means for projecting and retracting said dead bolt, a movable blocking member, means normally tending to position said member to cooperate with said dead bolt and block the retraction thereof through said key-controlled means, latching means for holding said blocking member inoperatively positioned, electrically controlled means for operating said latching means to release said blocking member, and other key-controlled means adapted to move said blocking member from operative to inoperative position and to retract said dead bolt.

6. In a lock, a dead bolt, means operable by a series of keys to project and retract said dead bolt, movable blocking means normally tending to coiiperate with said bolt to block the retraction thereof through said key-controlled means, means for holding said blocking means in inoperative position, means under electric control for operating said holding means to release said blocking means, and means operable by a certain key only to inoperatively position said blocking means and to retract said dead bolt.

7. In a look, a dead bolt, key-controlled means for projecting and retracting said &

dead bolt, an abutment on said dead bolt, a movable blocking member, means normally tending to position said member to cooperate with said abutment and block the retraction of said bolt through said key-controlled means, an electro-magnet, a latching armature cooperating therewith and arranged to engage said blocking member to hold the same in inoperative position, means normally tending to hold said armature in latchengaging position, said armature upon the energizing of said electro-magnet being HENRY Gr. VOIGHT.

WVitnesses:

E. E. MORSE, FLORENCE G. HADLEY.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of I'atents,

Washington, D. G.

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