US204295A - Improvement in ladders - Google Patents
Improvement in ladders Download PDFInfo
- Publication number
- US204295A US204295A US204295DA US204295A US 204295 A US204295 A US 204295A US 204295D A US204295D A US 204295DA US 204295 A US204295 A US 204295A
- Authority
- US
- United States
- Prior art keywords
- improvement
- rounds
- ropes
- ladders
- frederick
- 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
- 239000002965 rope Substances 0.000 description 16
- 238000010276 construction Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 210000001699 lower leg Anatomy 0.000 description 2
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/52—Ladders in general with non-rigid longitudinal members
- E06C1/56—Rope or chain ladders
-
- 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
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/44—Clasp, clip, support-clamp, or required component thereof
- Y10T24/44573—Clasp, clip, support-clamp, or required component thereof including track or way guided and retained gripping member
- Y10T24/4459—Clasp, clip, support-clamp, or required component thereof including track or way guided and retained gripping member with operator for moving guided member
- Y10T24/44598—Threaded cylindrical rod and mating cavity
Definitions
- My invention is an improvement in the class of ladders having rigid rounds, which are at tached to the ropes or other side pieces by means of screw-clamps.
- the improvement consists in the particular construction of the clamping device, as hereinafter described.
- Figure 1 is alongitudinal section of one of the rounds of theladder with a fragment of a rope passing through one of the eyes.
- Fig. 2 represents the eye and socket of the round detached.
- Fig. 3 represents a fragment of the ladder complete..
- A indicates the ropes or parallel side pieces of the ladder.
- the rounds or rungs B are tubular, and provided internally at their respective ends with a right and left screwthread, a.
- the ends of the rounds enter circular cavities or recesses in socket C, which have a gro,ove,b, in their opposite sides to receive the ropes A.
- the ropes pass through the eyes of bolts D, which screw into the ends of the rounds B, as shown.
Description
UNITED STATES PATENT GEEIOE.
FREDERICK A.l COPELAND, OF LA CROSSE, WISCONSIN.
' IMPROVEMENT |N LAODERS.
Specification forming part of Letters Patent No. 204,295, dated May 28,1878 application led May 4, 157e.
To all whom it may concern:
Be it known that I, FREDERICK A. COPE- LAND, of the city and county of La Crosse, and State of Wisconsin, have invented a new and useful Improvement in Ladders; and I do hereby declare that the following is a full, clear, and exact description of the same.
My invention is an improvement in the class of ladders having rigid rounds, which are at tached to the ropes or other side pieces by means of screw-clamps. "m
The improvement consists in the particular construction of the clamping device, as hereinafter described.
In the accompanying drawing, forming part of this specication, Figure 1 is alongitudinal section of one of the rounds of theladder with a fragment of a rope passing through one of the eyes. Fig. 2 represents the eye and socket of the round detached. Fig. 3 represents a fragment of the ladder complete..
A indicates the ropes or parallel side pieces of the ladder. The rounds or rungs B are tubular, and provided internally at their respective ends with a right and left screwthread, a. The ends of the rounds enter circular cavities or recesses in socket C, which have a gro,ove,b, in their opposite sides to receive the ropes A. The ropes pass through the eyes of bolts D, which screw into the ends of the rounds B, as shown.
By this construction and arrangenient'of parts, it is obvious that to form a ladder the ropes A are passed through the eyes of bolts D, whose Shanks are then inserted through sockets C, and the rounds B screwed on two opposite bolts simultaneously until the ropes are clamped tightly in the grooves of the sockets by reason of the pressure between the latter and the outer side of the bolteyes.
The chief advantage of the invention over others of its kind consists in the fact that in the clamping operation the ends of the rounds do not come in contact with the ropes, and hence the fibers of the latter are not out or otherwise injured, but are clamped between FREDERICK A.v COPELAND.
. Witnesses:
' J OIIN B. WEBB,
LEVI WITHEE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US204295A true US204295A (en) | 1878-05-28 |
Family
ID=2273700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US204295D Expired - Lifetime US204295A (en) | Improvement in ladders |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US204295A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518839A (en) * | 1947-06-27 | 1950-08-15 | Thonney Paul | Emergency fire escape ladder |
-
0
- US US204295D patent/US204295A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518839A (en) * | 1947-06-27 | 1950-08-15 | Thonney Paul | Emergency fire escape ladder |
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