US318861A - Halp to chaeles w - Google Patents
Halp to chaeles w Download PDFInfo
- Publication number
- US318861A US318861A US318861DA US318861A US 318861 A US318861 A US 318861A US 318861D A US318861D A US 318861DA US 318861 A US318861 A US 318861A
- Authority
- US
- United States
- Prior art keywords
- key
- semicircular
- halp
- chaeles
- keys
- 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
- 239000002184 metal Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 210000001699 lower leg Anatomy 0.000 description 4
- 230000003042 antagnostic Effects 0.000 description 2
- 239000005557 antagonist Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
-
- 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
- Y10T70/778—Operating elements
- Y10T70/7791—Keys
- Y10T70/7842—Single shank or stem
- Y10T70/787—Irregular nonplanar or undulated
Definitions
- My invention relates to an improvement in keys for looks; and it consists in an improved construction of a key of semicircular form, whereby it is rendered simpler and more convenient for use, the object being to pro vide a key for use with all such locks as are furnished with a semicircular key-slot as a safeguard against picking.
- my former application for Letters Patent for lock Serial No. 159,140, referred March 17, 1885, I made mention of this semicircular key, which forms the subject-matter of the present application, but did not therein claim it.
- Figure l is a perspective of the key
- Fig. 2 is a cross-section of the same
- Fig. 3 is a similar section showing notches on each side.
- Fig. 1 shows the form of constructing the key, A being the shank, concaved on one side along its length at a, and convex along the opposite side.thus making the key of a uniform thickness, the inner and outer sides being ap proximately parallel, as shown by the section in Fig. 2.
- the end 0, to be inserted in the key-way is preferably made somewhat larger than the remaining portion of the key, though without any essential difference in form of construction, the increased size being effected by a mere tapering enlargement of the keyhandle into the semicircular barrel which en ters the lock.
- the part 0 is bitted or notched as at 11 h, transversely to the length of the key, and on one or both edges.
- the arrangement of these bits or notches must obviously depend in every instance upon the arrangement of the wards and tumblers of the key mechanism, which they are adapted to operate, and they may be of any number and size.
- the endof the key may also be notched or bitted to correspond with any peculiarities in the construction of the key mechanism.
- my improved key may be constructed in various ways and of one or more pieces of metal, as desired. It may be cast or struck up or stamped from a single piece of sheet metal, or it may be formed by the welding of several pieces, any desired metal being used in these different operations.
- a semicircular key possesses many advantages over the flat-plate keys and also over the roundstemmed keys. Its semicircular form insures as thorough a guiding and support during its insertion and rotation as does the circular roundstemmed form, and with the advantage of dispensing with the circular key-way, which ati'ords every facility for picking the lock, and the substitution therefor of the semicircular slot, which is an effectual antagonist of the picking-tool.
- the ordinary flat-plate key does not obviate the disadvantages of a circular key-hole.
Landscapes
- Supports Or Holders For Household Use (AREA)
Description
(No Model.)
B. W. BRETTELL.
KEY. v
N0. 318,861. Patented May 26, 1885.
02M y y w NITE Srrrs Parent @rrrcn.
EDWARD W. BRETTELL, OF NEWARK, NE /V JERSEY, ASSIGNOR OF OXE- HALF TO CHARLES WV. A. HOMER AND JOHh H. WILKINS, BOTH OF SAME PLACE.
KEY.
SPECIFICATION forming part of Letters Patent No. 318,861, dated May 26, 1885.
' Application filed April 25, 1885. (No model.)
To all whom, it may concern.-
Be itknown that I, EDWARD W. BRETTELL, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Keys; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, refer ence being had to the accompanying drawings and to the letters and figures of reference marked thereon, which form a part of this specification.
My invention relates to an improvement in keys for looks; and it consists in an improved construction of a key of semicircular form, whereby it is rendered simpler and more convenient for use, the object being to pro vide a key for use with all such locks as are furnished with a semicircular key-slot as a safeguard against picking. In my former application for Letters Patent for lock, Serial No. 159,140, iiled March 17, 1885, I made mention of this semicircular key, which forms the subject-matter of the present application, but did not therein claim it.
In the annexed drawings illustrating my invention, Figure l is a perspective of the key, and Fig. 2 is a cross-section of the same. Fig. 3 is a similar section showing notches on each side.
Fig. 1 shows the form of constructing the key, A being the shank, concaved on one side along its length at a, and convex along the opposite side.thus making the key of a uniform thickness, the inner and outer sides being ap proximately parallel, as shown by the section in Fig. 2. The end 0, to be inserted in the key-way, is preferably made somewhat larger than the remaining portion of the key, though without any essential difference in form of construction, the increased size being effected by a mere tapering enlargement of the keyhandle into the semicircular barrel which en ters the lock. This is advantageous, for the keys may have their parts 0 made of different sizes for difierent locks, while the shank A preserves substantially the same dimensions. The part 0 is bitted or notched as at 11 h, transversely to the length of the key, and on one or both edges. The arrangement of these bits or notches must obviously depend in every instance upon the arrangement of the wards and tumblers of the key mechanism, which they are adapted to operate, and they may be of any number and size. The endof the key may also be notched or bitted to correspond with any peculiarities in the construction of the key mechanism.
It will be seen that my improved key may be constructed in various ways and of one or more pieces of metal, as desired. It may be cast or struck up or stamped from a single piece of sheet metal, or it may be formed by the welding of several pieces, any desired metal being used in these different operations.
A semicircular key possesses many advantages over the flat-plate keys and also over the roundstemmed keys. Its semicircular form insures as thorough a guiding and support during its insertion and rotation as does the circular roundstemmed form, and with the advantage of dispensing with the circular key-way, which ati'ords every facility for picking the lock, and the substitution therefor of the semicircular slot, which is an effectual antagonist of the picking-tool. The ordinary flat-plate key does not obviate the disadvantages of a circular key-hole. This is done by the semicircular form wherein the convexity of the hub or plate in the key-way projects inward, even beyond the central line of the key-way, and does not allow a sufficient tilting of the picking-tool for it to ac complish its purpose.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-
A semicircular metal key notched or bitted on its sides, substantially as shown and described.
In testimony whereof I affix my signature in presence of two witnesses.
EDIVARD \V. BRETTELL.
Witnesses:
JOHN H. WILKINs, Honncn I. BALDWIN.
Publications (1)
Publication Number | Publication Date |
---|---|
US318861A true US318861A (en) | 1885-05-26 |
Family
ID=2388006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US318861D Expired - Lifetime US318861A (en) | Halp to chaeles w |
Country Status (1)
Country | Link |
---|---|
US (1) | US318861A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2690070A (en) * | 1951-05-26 | 1954-09-28 | Yale & Towne Mfg Co | Rotary tumbler cylinder lock |
-
0
- US US318861D patent/US318861A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2690070A (en) * | 1951-05-26 | 1954-09-28 | Yale & Towne Mfg Co | Rotary tumbler cylinder lock |
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