US9126A

US9126A - Marcus r

Info

Publication number: US9126A
Authority: US
Publication date: 1852-07-13
Anticipated expiration: 1869-07-13

Description

U TE Elf STATES PATENT OFFICE.

MARCUS R. STEPHENSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO EDWIN I-IOLMAN.

DOOR-LOCK.

Specification of Letters Patent No. 9,126, dated July 18, 1852.

To aZZ whom it may concern:

Be it known that I, MARCUS R. STEPHEN- soN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Locks for Doors; and I do hereby declare that the. same are fully described and represented 1n the following speciiication and accompanying drawings, letters, figures, and references thereof.

Of the said drawings Figure 1 denotes a view of the rear part or face of the lock. Fig. 2 is a view of the same as it appears with its back plate removed. Fig. 3 is a view of the same as it appears with both back and cover plates removed. Fig. 4 is a vertical and transverse section taken through the center of the cover plate and the tumblers. Fig. 5 is an underside view of the cover plate. Fig. 6 is a side view of it. Fig. 7 is a top view of the bit plate slide, the tumblers and part of the bolt. Fig. 8 is a side view et the bit plate and Fig. 9 is top view of it.

In the construction of my improved lock, I have not only sought to make one in which the tumblers cannot be reached by a picklock, or by the usual means used by such persons, or by burglars to pick a lock, but to produce one which in the ordinary acceptation of the term would be powder proozt,r or protected from the introduction into it of gunpowder or any other explosive material for the purpose of blowing it up or injuring it.

A distinctive feature of my lock and which is peculiar to some others in use is what is termed a rotating cover plate attached to the shank of the knob or contrivance which throws the bolt. This cover plate rests over a stationary block or bed. In the above mentioned drawings the said cover plate is represented at A. It consists of a circular plate attached to a shank or arbor B, supported and made to rotate in bearings a, b, applied to or made in the sides c, (Z, of the lock case C. The said arbor projects entirely through the back plate c, and has either a key hole e, made in it for the recept-ion of a turning key D (see Fig. 10, which is a side view of said key) or it may have a common knob applied to it, so as to enable a person to turn it by the simple application and proper movement of his hand.

The bolt of the lock is seen at E. It is arranged, constructed and made to operate :in connection with a series of slide plates or tumblers F, in the usual manner. remark, however, that in my improved lock the bolt is thrown or moved back and forth by a projection f, extended from the arbor of the cover plate A, while the tumblers are elevated by means of a bit plate G, which `is particularly represented in Figs. 8 and 9. This bit plate is inserted or placed in a suitable recess g, made in what I term the bit vplate slide H. This slide I-I, is raised and depressed or made to slide up and down by means of a projection or bit h, extended lfrom the arbor of the cover plate A, and `made to operate in connection with either one of the two sides z', 7c, of a. recess Z, made through the slide H, as seen in Fig. 7 On turning the arbor so as to move the projection lz, against the side z', the slide H may be moved up or toward the tumblers, and so as to carry the bit plate (when placed within it) against the projections or tails Z, Z, &c., of the several tumblers. A movement of the projection h, in the opposite direction, or against the side Z0, produces a reversed or downward motion of the slide H. It may be remarked that the lengths of the several projections Z, Z of the tumblers are so regulated to their respective bits m, m, &c., of the bit plate as to cause all the horizontal openings or passages (one of which is seen at a in Fig. 7) to be brought into correct positions to enable the stud 0 of the main bolt,7 or bolt, to pass through them while the bolt is being thrown either backward or forward. The slide plate H, is kept in place and made to slide under and in a circular stationary ring or block I, which is secured fast to the case of the lock, the cover plate A, being made to traverse directly on the said ring or block I, and to be covered by the back or removable plate a of the case.

Through the cover plate A, there is an elongated or rectangular shaped passage o-r orifice p, made of a size just sufficient to allow the bit plate to be passed endwise through it, and either inserted in or extracted from the recess g, as circumstances may require, the said oriice p being so arranged that by turning around the cover plate a sufficient distance the said orifice may be brought directly in range of the recess g, as well as in range of another and similar opening or passage Q, made through the back plate c of the lock case.

I would Between the recess of the slide lplate H, and the projections Z, Z, &c., of the tumblers there is an arc lip r, which is made to eX- tend down fro-m the cover plate A, as seen in Figs. 4 and 5. It occupies about ninetyfive degrees of a circle, although it is by no means to be confined to such length, as it may be made much shorter. The object of it is to prevent any access to the tumblers or their projections Z, Z, &c., while the orifice 72 Y is in range with the recess g and the bit plate is not in t-he said recess. The rotary movement of the cover plate should carry the lip r, out of the way of the slide H, before the said slide is moved in order to carry the bit plate against the tumblers. This lip has another object, which is to prevent the introduction of gunpowder or any explosive material through the recess g, and into the body of the lock, which it does in consequence of its being made to move or stand close against the open end of the recess g.

In the operation of locking or throwing forward the bolt the bit plate is inserted in its slide H. The cover plate is neXt rotated by means of its key, and the bolt is not moved until after the opening p has passed entirely by or out of range wit-h the bit plate or recess thereof nor until the arc lip has been moved from before the projection s of' the slide H. Such projection carrying the bit plate and being made to move in and out of a corresponding recess t, made in the stationary ring or block I. Y

Fig. 11 represents an underside view of the back plate c, and the cover plate A, as applied to it. There is a spring latch or dog u, attached to the plate c and made to turn at one end on a pin fu. Its other end has a triangular projection w, which rests against the periphery of the cover plate, and when the orifice p vcomes in range with the bit plate recess of the slide I-I, and the passage g, this triangular projection enters a notch w, (made in the periphery of the cover plate,) and thereby holds the cover plate in position, or still, so as to enable a person to either insert the bit plate in the recess g, or remove it therefrom, as occasion may require.

There are locks which have a revolving block in which a separaterbit plate is inserted and carried around against the tumblers vwith and by such block. Such a lock is that patented by John Oxnard the tenth day of April, A. D. 1845. There are other locks which have a revolving cover plate fixed upon the arbor of the knob that carries the key or contrivance which throws the main bolt, the bit plate by which'the tumblers are elevated being put in place, or on its recess, and made to act against the tumblers 4before the cover plate is moved or turned, so

as to cover the key hole or recess for the reception of t-he bit plate, such action of the bit plate being produced by a power separa-te from that which turns the cover plate and knob. Of this last classis the lock patented on the first day of August, A. D. 1848, by Villiam Hall. In my improved lock, which is a lock having a cover plate', such is not the case, it being so constructed that the tumblers shall not be moved by the bit plate until after the bit plate and its recess, or bit plate entrance, have been entirely covered over by the cover plate, or closed by it, from access, it also being so constructed that the parts by which the bit plate'is put in operation are so made that such bit plate and the slide which holds it shall be moved (so as to make it more against the tumblers) by a stud, key or an equivalent contrivance applied to the arbor ofthe cover plate.

I therefore claiml. The combination of the cover plate, and its arbor with the slide for carrying the bit fplate, and a contrivance applied to the said arbor, and made to actuate the said slide and bit plate, all constructed and made to operate together substantially as herein before described. Y

2. And I also claim, the improvement termed the circular arc lip, in its combination with the cover plate and the tumblers and the key which does not revolve with the cover `plate and made to project down between the bit plate recess and the tumblers, when the bit plate hole or entrance of the cover plate Vuncovers the bit plate recess either in whole or in part; all substantially as hereinbefore explained.

'In testimony whereof I have hereto set my signature this twenty-sixth day of August, A. D. 1851.

MARCUS R. STEPHENSON.

Witnesses:

CALEB EDDY, OLIVER EDWARDS.