US840873A - Lock. - Google Patents

Description

No. 840,873. PATENTBD JAN. 8, 1907.

W. E. SPARKS. LOCK.

APPLICATION FILED SEP'i'.-12, 1904.

2 SHEETS-SHEET 1.

PATENTED JAN. 8, 1907. W'. E. SPARKS. LOCK APP'LIOATION FILED SEPT.12,1904.

2 SHEETS-SHEET-Z.

UNITED STATES PATENT OFFICE.

WILLIAM E. SPARKS, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPO- RATION OF CONNECTICUT.

LOCK.

No. 840,873. Specification of Letters Patent. Patented Jan. 8, 1907.' Application filed September 12, 1904. Ser al No. 224,109.

T 6W1 whom it y OOVbOWI/I wings D, adapted to engage lugs E on a slid- 5 Be it known that I, WILLIAM E. SPARKS, of ing yoke F. The yoke F at-its forward end the city and county of New Haven, State of has projections G, which engage depending Connecticut, have invented new and useful studs H on rear projections I of the latch- Irnprovements in Locks, of which the followbolt K, whereby upon the rearward moveing is afull, clear, and exact description when ment of the yoke F under pressure exerted 6o taken in connection with the accompanying on the hub the latch-bolt K will be retracted. drawings, which form a part thereof, and in On the other hand, the projections I of the which latch-bolt K are adapted to come in contact Figure 1 represents a front elevation of a with a flange or flanges L on the yoke, so that lock embodying my invention; Fig. 2, a rear upon the retraction of the bolt K the yoke view of the same, the cap-plate having been will be forced rearward also. The latch-bolt removed; Figs. 3 and 4, similar views with is, however, capable of a slight movement inthe parts shown in different positions; Fig. 5, dependent of the yoke before the projections a detail rear view of the yoke; Figs. 6 and 7, I contact with the flanges L. rear and front detail views, respectively, of A spring M, connecting case A and latch the latch; and Figs. 8 and 9, central longitubolt K, normally retains the bolt in its prodinal sections through the latch on lines 8 8 tracted position, and a spring N, connecting of Fig. 7, in Fig. 9 latch being shown in enthe case A and yoke F, normally holds the gagement with the keeper. yoke in the same position. These parts may,

In all figures similarletters of reference j however, be of any suitable construction and represent like parts. are not, therefore, described in detail.

This invention relates to looks, and has for I The forward end of the latch-bolt is proits object the production of a lock having a vided with a longitudinal recess O, in which novel form of safety-catch which prevents is pivoted at Q a safety-catch P, having subthe bolt when in engagement with the keeper stantially the form of abell-crank lever. One from being retracted by any external means end B of the safety-catch is constructed to other than the lock itself. When in use on a conform with the outer end or face of the bolt door, it will thus be impossible for a sneak K, and the other end S is adapted to be enthief or other person to insert an instrument gaged by a spring T, fitting in a socket U in between the keeper and the lock and retract the bolt, so that normally the end B of the the latch. catch will fit in the groove or recess O and To this end the invention consists in a conform to the outer end of the bolt K. safety-catch pivoted to the bolt, adapted to Pivoted on a post V on the case A is a engage the side of the keeper when the bolt is locking-dog W, the forward end or nose X of protracted and prevent the retraction of the which is adapted to project behind the part 0 bolt except by means of the key, knob, or S of the safety-catch P when the'parts are at other legitimate means. rest, Figs. 2 and 4. A post Y on the yoke The invention further consists of novel engages a groove or notch Z-in the dog W, s0 means for regulating the movement of the that upon the retraction of the-yoke the post safety-catch, together with other improve- Y will tend to rotate the dog W, swinging the 9 5 ments and combinations of parts set forth nose X from its position in the rear of the and claimed hereinafter. safety-catch P, as shown more particularly Referring to the drawings for a more parin Fig. 3. ticular description, the part designated by A thumb-piece A is shown in Fig. 1 on the the letter A represents the lock-case open on outside of the casing A, which is adapted, by 1 00 its reverse side, which opening is adapted to means of suitable mechan sm, (not shown,) be closed by a cap-plate. (Not shown.) The to lock the latch-bolt K against retraction invention is shown applied to arim-lock, but in a well-known manner when the thumbis adapted for use in any suitable form of piece is shifted to aproper position.

lock. The operation of the lock is as follows:

B designates the knob, and C the hub or When the parts are in their normal position, shank to which the knob is connected in any (shown in Fig. 2,) the dog W engages the arm suitable manner. The hub C has lateral S of the safety-catch P, so that the bolt cannot be retracted unless the dog W is swung catch pivoted to the bolt; and a device adaptout of the path of the safety-catch, Fig. 3, ed to engage said safety-catch and rotate it or the safety-catch P is swung on its pivot, when the bolt is pushed in, and mechanism Fig. 8. The first of these operations takes operated by the bolt adapted to withdraw place when the bolt is retracted by means of said device from said engagement upon the 70 the knob, for when the hub C of the knobrotation of said catch, substantially as deshank is rotated and retracts the yoke F, as scribed.

shown more particularly in Fig. 3, the 0st 3. In a lock, the combination with the Y on the yoke engages in the groove Z 0 the case; of a bolt movable in said case; a safetydog W and rotates the dog, so that the nose catch pivoted to the bolt; a device adapted 75 X is removed from the path of the arm S-of to engage said safety-catch and rotate it the safety-catch P. The bolt may then be when the bolt is pushed/in, and mechanism retracted on the continued rearward movefor withdrawing said device from such enment of the yoke by means of the engagement gagement, substantially as described.

I 5 between the projections G on the yoke and I 4:. In a lock, the combination with the 80 depending studs H on the bolt. Upon the case; of a bolt movable in said case; a safetyrelease of the knob the parts are restored to catch pivoted to the bolt; a device adapted their normal position and the bolt is proto engage said safety-catch and rotate it tracted by means of the spr n M or N. The when the bolt is pushed in and mechanism second of these operations ta es place when for withdrawing said device from such en- 85 the bolt is retracted by pressure on its face, gagement upon the further rearward move- (as when the door is closing and the face of ment of the bolt, substantially as described. the bolt strikes the keeper.) The lower arm 5. In a lock, the combination with the S of the safety-catch P is engaged by the nose case of a bolt movable in said case a safety- X of the checking-dog W, so that rearward catch on the bolt; a device adapted to engage 9o movement of the bolt tends to swing the said safety-catch when the bolt is pushed in; safety-catch P on its pivot to substantially a retracting member for the bolt; and mechthe position shown in Fig. 8, where the catc anism for withdrawing'said device from such may swing upward into a suitable slot B in engagement only upon the rearward move- 0 the face-plate C of the casing A. At this ment of said member, substantially as de- 5 point when the parts have assumed the posiscribed. tions shown in Fig. 4 the projections I of the 6. In a lock, the combination with the bolt will strike against the flange L onthe case; of a bolt movable in said case a safety yoke and force the yoke rearward; but this catch pivoted to the bolt a device adapted to 3 5 rearward movement of the yoke rotates the engage said safety-catch to rotate it when 100 dog W by means of the stud Y, so that the the bolt is pushed in; a retracting member nose X is gradually drawn out of the path of for the bolt adapted to withdraw said device the arm S, whereupon the bolt may be forced from such engagement upon the rearward entirely back without being further checked movement of the bolt, substantially as de- 4 by the dog. Y scribed.

Under the conditions suggested above the 7. In a lock, the combination with the safety-catch will not check the latchbolt,' case; of a bolt movable in said case; safetybut when the bolt is shot home into the catch pivoted to the bolt; a device adapted keeper (see Fig. 9) and an attem t is made to engage said safety-catch to rotate it when 4 5 to retract the bolt by operating out eproject- I the bolt is pushed'in; mechanism for Withno mg portion of the bolt the safetycatch drawing said device from such engagement comes into play. The locking-dog W strikes operated by the bolt, after the bolt is'paragainst the arm S of the safety-catch P, and tially retracted, substantially as described. the latter is not free to turn on'its Ipivot, ow- 8. In a lock, the combination with the 5 ing to its engagement with the eeper, so 2 case; of a bolt movable in said case; a safety- I I5 that the bolt cannot be retracted. I catch pivoted to the bolt; a device adapted Having now described my invention, I to engage said safet -catch to rotate it when which mayvary in its details without departthe bolt is pushed in; a sliding member for ing from the spirit thereof, what I claim, and retracting the bolt, adapted to withdraw desire to secure by Letters Patent, is said device from such engagement, said slid- I20 1. In a lock, the combination with the ing member being retracted by the bolt upon case of a bolt movable in said case a safetyits continued retraction after it has been parcatch pivoted to the bolt a device adapted tially pushed in, substantially as described. to engage said safety-catch and rotate it In witness whereof I have hereunto set my glen tdhe bolt is pililshed1 in and a keepler hand on the 29th day of August, 1904.

a a te to enga e t e bo t an revent t e rota tion of said safetybatch; sd bstantially WILLIAM\E"SPARKS' as described. Witnesses:

2. In a lock, the combination with the I L. F. BREESE, case; of a bolt movable in said case; a safety- F. M. VALENTINE.

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