US194789A - Improvement in latches for doors - Google Patents
Improvement in latches for doors Download PDFInfo
- Publication number
- US194789A US194789A US194789DA US194789A US 194789 A US194789 A US 194789A US 194789D A US194789D A US 194789DA US 194789 A US194789 A US 194789A
- Authority
- US
- United States
- Prior art keywords
- bolt
- latch
- lever
- cam
- doors
- 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
- 210000001503 Joints Anatomy 0.000 description 2
- 230000000994 depressed Effects 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/12—Locks or fastenings with special structural characteristics with means carried by the bolt for interlocking with the keeper
- E05B63/127—Locks or fastenings with special structural characteristics with means carried by the bolt for interlocking with the keeper the bolt having an additional rotating bolt or movement
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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
- Y10T292/00—Closure fasteners
- Y10T292/08—Bolts
- Y10T292/096—Sliding
- Y10T292/1036—End lever
Definitions
- Patented s epty, 1877 Patented s epty, 1877.
- My invention consists in the combination of a latch -bolt and cam-lever (which engages with the striker) with a link which forms the jointed connection between said cam lever and latch-bolt, as hereinafter described.
- Figure l is a side elevation of a latch which embodies my invention, the same being represented with the front plate removed.
- Fig. 2 is a horizon tal section of the same on line at m of Fig. 1; and Fig. 3 shows detached views of parts of the same.
- A designates an ordinary latch-bolt, which may be drawn inward by means of any ordinary mechanism, the same forming no part of my invention, so that it is deemed unnecessary to show said mechanism in the drawing.
- the latch-bolt is also forced outward by a spring in the ordinary manner.
- My invention relates to the mechanism for forcing the latch-bolt inward by engagement with the striker.
- the case maybe of any form adapted to the particular mechanism which it is designed to incase.
- cam-lever B projects slightly forward of the beveled end of the latch-bolt, so as to engage with the ordinary striker in a well-known manner.
- the oscillating cam-lever is connected to the latch-bolt by means of a link, E, hung by ajointed connection at each end, the outer end being connected to the cam-lever B, and the inner end to the latch-bolt A, as shown in Fig. 2.
- a detached view of said cam-lever and link is shown in Fig. 3.
- the operation is as follows, viz: When the door is swung to, and the edge of the camlever engages the striker, first, by contact at or about the point 1, Fig. 2, then the camlever swings inward on its pin, the point of engagement gradually changing along the edge of the cam-lever from the point 1 to the point 2, when the said lever is depressed substantially within the case, the inward movement being taken up by the link, and through it imparted to the latch-bolt to force it into the case, as indicated by broken lines in Fig. 2, the joints at each end of thelink preventing the swinging movement of the cam-lever from having a tendency to throw the latch-bolt out of line and enabling the cam to force the bolt inward with but little friction, and with a free and easy movement.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Clamps And Clips (AREA)
Description
' 0.11. SMITH. LA-TCHES FOR DOORS, &c.
No. 194,7 9; I
Patented s epty, 1877.
UNITED STATES PATENT OFFICE.
CHARLES H. SMITH, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO P. 86 F.
' CORBIN, OF SAME PLACE.
IMPROVEMENT IN LATCHES FOR DOORS, 8e0- Specification forming part of Letters Patent No. l94,7S9, dated September 4, 1877; application filed July 27, 1877.
To all whom it may concern:
Be it known that I, CHARLES H. SMITH, of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Latches for Doors, &c., of which the following is a specification:
My invention consists in the combination of a latch -bolt and cam-lever (which engages with the striker) with a link which forms the jointed connection between said cam lever and latch-bolt, as hereinafter described.
In the accompanying drawing, Figure l is a side elevation of a latch which embodies my invention, the same being represented with the front plate removed. Fig. 2 is a horizon tal section of the same on line at m of Fig. 1; and Fig. 3 shows detached views of parts of the same.
A designates an ordinary latch-bolt, which may be drawn inward by means of any ordinary mechanism, the same forming no part of my invention, so that it is deemed unnecessary to show said mechanism in the drawing. The latch-bolt is also forced outward by a spring in the ordinary manner.
My invention relates to the mechanism for forcing the latch-bolt inward by engagement with the striker.
B designates an oscillating cam-lever, hung to the case D at one side of the latch-bolt by means of a pin, so as to swing freely thereon.
The case maybe of any form adapted to the particular mechanism which it is designed to incase.
The outer edge of said cam-lever B projects slightly forward of the beveled end of the latch-bolt, so as to engage with the ordinary striker in a well-known manner. The oscillating cam-lever is connected to the latch-bolt by means of a link, E, hung by ajointed connection at each end, the outer end being connected to the cam-lever B, and the inner end to the latch-bolt A, as shown in Fig. 2. A detached view of said cam-lever and link is shown in Fig. 3.
The operation is as follows, viz: When the door is swung to, and the edge of the camlever engages the striker, first, by contact at or about the point 1, Fig. 2, then the camlever swings inward on its pin, the point of engagement gradually changing along the edge of the cam-lever from the point 1 to the point 2, when the said lever is depressed substantially within the case, the inward movement being taken up by the link, and through it imparted to the latch-bolt to force it into the case, as indicated by broken lines in Fig. 2, the joints at each end of thelink preventing the swinging movement of the cam-lever from having a tendency to throw the latch-bolt out of line and enabling the cam to force the bolt inward with but little friction, and with a free and easy movement.
I claim as my invention- The combination of a latch-bolt and camlever, of the class described, with a link which forms the jointed connection between said lever and bolt, substantially as described, and for the purpose specified.
CHARLES H. SMITH.
Witnesses:
CHARLES PEOK, E. L. PRIOR.
Publications (1)
Publication Number | Publication Date |
---|---|
US194789A true US194789A (en) | 1877-09-04 |
Family
ID=2264195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US194789D Expired - Lifetime US194789A (en) | Improvement in latches for doors |
Country Status (1)
Country | Link |
---|---|
US (1) | US194789A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4988133A (en) * | 1988-12-02 | 1991-01-29 | Shih Nan C | Lock structure with direction-changeable device |
-
0
- US US194789D patent/US194789A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4988133A (en) * | 1988-12-02 | 1991-01-29 | Shih Nan C | Lock structure with direction-changeable device |
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