US92502A - Improvement in door-locks - Google Patents

Description

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thinned tapes @aient @titille Letters Patent No. 92,502, dated July 13, 1869."

IMPROVEMENT IN DOOR-LOCKS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I,- THOMAS B. WonRaLL, of Frankford, Philadelphia county, Pennsylvania, have inventeda new and useful Improvementin Burglar-Proof Locks; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying'drawings, and to the letters of reference marked thereon.

The nature of my invention consists of interlocking bars, arranged in the same plane, so as not to increase the depth of the lock, the -said bars being in combination with the locking-bolts, and having crossfgrooves through which the bolts pass as they are shot outward and inward; and when the bolts are to be fastcned in their outward position, the said cross-bars are moved by suitable mechanism so as to bring their ribs into cross-grooves of the bolts, the bars being susceptible of being moved variable distances, andot indefinite changes in their relative movements. No person but thebne who has adjusted the bars could possibly open the lock, not knowing what distance to move each rack, so as to make their grooves coincide with the bolts, as will be understood by the following description In the accompanying drawings, which make a part of this specification- Figure l is a, face view of the inside of a door and the improved lock.

v Figure 2 is a vertical section at the line a: :t of fig. 1.

Figure 3 is an outside face view of the door. Figure 4 is a perspective view of the key I.

Figure 5 is a like view of one of the sliding bars J.

Figure 6 is a view of the 'supporting bar H reversed. Like letters in all the figures indicate the same parts.

A is a door;

B B are vertical bolts; and

G, a bolt at right angles thereto.

'Ihe bolts B B slide in slots of the cross-guides The bolt G, and parallel rack l), are guided by the strips b b.

lil is a pinion on the central pin F, which has a head, c, which turns freely in the plate G, which is sunk into the face of the door A, and confined by means of screws d, when the door is made of wood, as repre scntedin the drawings. The inner end oi' the pin is supported in the hole 1 oi' the supporting-bar H, as seen in iig. 2, but which is left off of iig. 1.v rlhe pinion E gears into the teeth of the bolts B B, and also into those ofthe bolt C and the -rack D, so that by turning the pinion by means ot' the key I, as represented in tig. 4, the bolts are shot outward and upward simultaneously. l

- I have two or more sliding bars, J, which are guided by the rebatcd strips e, and arc operated by means of the pinions E E', on the pins F F', whose heads ff turn in the lplate G. The inner ends of the pins are supported by the bar H, as seen in iig. 2.

I arrange the said sliding bars J in the same plane, so that any desirable number may be used without increasing the depth of lthe lock, giving Acompactness to .the latter, and making it susceptible'of much cheaper construction than when the bars are arranged in different planes, consequent upon` the peculiar construction of the locks hitherto invented.

Projecting from the sliding bars J, are ribs g, which have cross-grooves laas seen in iig. 5, equal in length to the distance across the bolts B B, so that when they are brought to coincide with the bolts, the latter may be moved either way. A

When the door is locked by shifting said bars either way, the ribs y are brought into the cross-grooves 'i of the bolts B B, to hold them securely.

The plate Gr, above described, has dots or indentations, j, concentric with the pins F of theI pinion' E', so that by observing which dot or indentation the pointer It oi' the key Ipoints to when the grooves h of the bars J respectively coincide with the bolts B B, and then turning the pinions either way one or more times, or a certain distance around, until the ends of the bars bear against the stops l, the adjustment will be understood. Each bar will haveto be moved different from the others, to make the cross-groove h coincide with the bolts B B, to allow them to be shot back, as said grooves are of variable distances from the end of the bars.

As the length of the grooves It are equal to the distance across the bolts B B, unless the racks are moved.

so as to make the grooves coincide with the bolts, the latter will be held fast, or if either of the bars is not brought so as to have the groove inline with the bolts, they will still be held fast, Hence it is impossible for any one who has not a previous accurate knowledge of the construction and adjustment ofthe bars to open the lock.

If desired, circular racks may take the place of the straight bars J.

The bolts B B are of such length that when they are shot inward in the unlocking of the door, their ends come against the cross-head of each other 'to arrest their motion, and in locking they are arrested by the stop m.

At the same time the cross-head of the cross-bolt C cornes against the contiguous end of the rack l). This latter provision might be dispensed with, as'the bolt C cannot move further when the motion of thel bolts B B is arrested.

lf desired, the rack D may be left oti, as its principal use is to equalize the action of the pinion E.

'By varying the distance of the cross-grooves ha, of; ,cach set ofthe bars J from the ends of .the same, an"

indeinite number of locks maybe made so unlike each tially as described, and operating in relation to each other as to make it impossible for aperson familiar other as aboveset forth.

lwith one to open any of the others. In testimony that the above is my invention, I have The lock may be used for a night-,latch with snitahereunto set my hand and axed my seal this 24th vble modification. day of February, A. D. 1869.

What I claim as new, and desire to secure by Let- ,THOS. B. WORRELL. [L 5.] ters Patent, is y vTwo or more interlocking bars, J, having recesses h, Witnesses: in combination with the locking-bolts B, the said bars STEPHEN Us'rIcK,`

and bolts being constructed and arranged substan- WM. LARZELERE.

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