US44475A - Improvement in locks - Google Patents
Improvement in locks Download PDFInfo
- Publication number
- US44475A US44475A US44475DA US44475A US 44475 A US44475 A US 44475A US 44475D A US44475D A US 44475DA US 44475 A US44475 A US 44475A
- Authority
- US
- United States
- Prior art keywords
- cam
- lock
- tumbler
- key
- bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005484 gravity Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 241000212384 Bifora Species 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
- E05B35/007—Locks for use with special keys or a plurality of keys ; keys therefor the key being a card, e.g. perforated, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/50—Special application
- Y10T70/5093—For closures
- Y10T70/5155—Door
- Y10T70/5199—Swinging door
- Y10T70/5246—Dead bolts
- Y10T70/5296—Single
- Y10T70/5319—Sliding
- Y10T70/5341—Key operable only
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7486—Single key
- Y10T70/7508—Tumbler type
- Y10T70/752—Sliding tumblers
- Y10T70/7531—Transverse
Definitions
- the object ot' this invention is to obtain a lock of simple construction without the employment or use of a spring, thereby avoiding a part which is extremely liable to get deranged or out of working order, either on account of breakage due to an improper tempei ing, or'to oxidation, the latter contingency being sure to occur if the lock is at all exposed to moisture or dampness.
- the invention consists in the employment or use of a cam applied to or used in connection with the bolt for operating the same, and also in using in connection with the cam one or more tumblers, all arranged substantially as Yhereinafter set forth.
- A represents the case of the lock, which may be constructed in the usual or in any proper way; and B is the bolt which works.
- C represents a. cam, a portion, a, of the edge ot'which is of circular form, and which is a portion of a circle of larger diameter than the other portion, b, which is of eccentric form and has a slot, C, made in it to receive a pin, d, on the bolt B.
- the portion b pnt' the cam is below the portion a, as shown in U is the key-hole through which the bit e of the key D is passed into the lock to turn the cam C, and by the turning ofthe cam, the bolt Bis shoved out or drawn into the case on account of the pin d fitting in the slot C,
- the cam which has an eccentric position with the axis of the cam.
- the cam is provided with a circular opening at its center, which works around an annular rim, ctx, in the case A.
- the heavier portion of the cam C being uppermost, it will be seen that it will have a tendency to drop or fall either to the right or left of its axis, according as its center of gravity passes to the right or left of its axis; hence a spring is compensated for, as the gravity of the cam performs that ofiice.
- a tumbler D, which is arranged to slide up and down behind the cam U, and between guides d.
- This tumbler is simplya fiat plate, having a stud, e, projecting from it at right angles, and which passes through a curved concentric slot, f, in the cam, the upper and lower edges of said slot being notched, as shown at g in Fig. 1.
- the lower end of the tumbler l) is hollowed out in semicircular form and has abead or ward, h, upon it,which a groove, i, in the bit of the key receives, and which causes the tumbler to be raised when the key is turned.
- the tumbler has a tendency to fall and does fall by its own gravity when the key is withdrawn from the lock, and the stud e catches into one of th. notches in the lower edge of the slot f, there by preventing the turning of the cam and the drawing in of the bolt by illegitimate means.
- the key when turned raises the tumbler the proper distance so as to free the stud from the lower notches, g, but not so high as to cause the stud to engage with the upper notches, g-a contingency which would occur if a pick were inserted into the lock, as there would be no guide in moving the tumbler, as is the case when ,the key is used.
- One or more tumblers may be used according to the kind or price of lock which may be required, or the tumbler may be dispensed with,lthus simplifying the construction, and the cam may beprolon ged or extended through and beyond the outer rim in a lever form to be moved by hand dispensing with a key, and thus forming a simple bolt.
Description
UNITED STATES PATENT OFFICE.
HENRY UNDERIOOD, OF TOLLAND, CONNECTICUT.
IMPROVEMENT IN LOCKS.
Specification forming part of Letters Patent No. 44,475, dated September 27, 1864.
.To all whom it may concern.-
Be it known that l, HENRY UNDEEwooD, ot' Tolland, in the county of Tolland and State of Connecticut, have invented a new and Improved Lock; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is an internal view ot' my invention, the case being in section, as indicated by the line a' x, Fig. 2; Fig. 2, a transverse section .of the same, taken in the line y y, Fig. 1.
Similar letters of reference indicate like parts.
The object ot' this invention is to obtain a lock of simple construction without the employment or use of a spring, thereby avoiding a part which is extremely liable to get deranged or out of working order, either on account of breakage due to an improper tempei ing, or'to oxidation, the latter contingency being sure to occur if the lock is at all exposed to moisture or dampness.
The invention consists in the employment or use of a cam applied to or used in connection with the bolt for operating the same, and also in using in connection with the cam one or more tumblers, all arranged substantially as Yhereinafter set forth.
A represents the case of the lock, which may be constructed in the usual or in any proper way; and B is the bolt which works.
through the side or end of the case, as usual.
C represents a. cam, a portion, a, of the edge ot'which is of circular form, and which is a portion of a circle of larger diameter than the other portion, b, which is of eccentric form and has a slot, C, made in it to receive a pin, d, on the bolt B. The portion b pnt' the cam is below the portion a, as shown in U is the key-hole through which the bit e of the key D is passed into the lock to turn the cam C, and by the turning ofthe cam, the bolt Bis shoved out or drawn into the case on account of the pin d fitting in the slot C,
which has an eccentric position with the axis of the cam. The cam is provided with a circular opening at its center, which works around an annular rim, ctx, in the case A. The heavier portion of the cam C being uppermost, it will be seen that it will have a tendency to drop or fall either to the right or left of its axis, according as its center of gravity passes to the right or left of its axis; hence a spring is compensated for, as the gravity of the cam performs that ofiice.
In order to render the lock difficult to pick, I employ a tumbler, D, which is arranged to slide up and down behind the cam U, and between guides d. This tumbler is simplya fiat plate, having a stud, e, projecting from it at right angles, and which passes through a curved concentric slot, f, in the cam, the upper and lower edges of said slot being notched, as shown at g in Fig. 1. The lower end of the tumbler l) is hollowed out in semicircular form and has abead or ward, h, upon it,which a groove, i, in the bit of the key receives, and which causes the tumbler to be raised when the key is turned. The tumbler has a tendency to fall and does fall by its own gravity when the key is withdrawn from the lock, and the stud e catches into one of th. notches in the lower edge of the slot f, there by preventing the turning of the cam and the drawing in of the bolt by illegitimate means. The key when turned raises the tumbler the proper distance so as to free the stud from the lower notches, g, but not so high as to cause the stud to engage with the upper notches, g-a contingency which would occur if a pick were inserted into the lock, as there would be no guide in moving the tumbler, as is the case when ,the key is used.
One or more tumblers may be used according to the kind or price of lock which may be required, or the tumbler may be dispensed with,lthus simplifying the construction, and the cam may beprolon ged or extended through and beyond the outer rim in a lever form to be moved by hand dispensing with a key, and thus forming a simple bolt.
Having thus described my invention, I claim as new and desire to secure by Letters Pat l1er D, one or more, provided with the stud e entand the Ward h, and the notched slot f in the l. The cam C, provided with the eccentric cam to receive the stud, all arranged substanslot C, und otherwise constructed as described, tiaily as and for the purpose specified.
iu connection with the pin d on the bolt B, all HENRY UNDERWOOD. arranged to operate substantially as and for Witnesses: the purpose set forth. y WILLIAM KEITH,
2. In combination with the eem C, the tuin- JOSEPH BISHOP.
Publications (1)
Publication Number | Publication Date |
---|---|
US44475A true US44475A (en) | 1864-09-27 |
Family
ID=2114039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US44475D Expired - Lifetime US44475A (en) | Improvement in locks |
Country Status (1)
Country | Link |
---|---|
US (1) | US44475A (en) |
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0
- US US44475D patent/US44475A/en not_active Expired - Lifetime
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