US345686A - Extension fire-ladder - Google Patents
Extension fire-ladder Download PDFInfo
- Publication number
- US345686A US345686A US345686DA US345686A US 345686 A US345686 A US 345686A US 345686D A US345686D A US 345686DA US 345686 A US345686 A US 345686A
- Authority
- US
- United States
- Prior art keywords
- ladder
- fire
- trunnions
- extension fire
- rollers
- 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
- 238000010276 construction Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
- E06C5/02—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
- E06C5/04—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic
- E06C5/22—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic by, or with the assistance of, springs
Definitions
- My invention relates to improvements made in mechanism for raising and lowering a hinged tions atthe jointsare features ofthis improvement.
- Figure 1 represents the improvement applied to a hinged fire-ladder on a truck, and shows the position of the parts with the ladder raised to .the vertical position.
- Fig. 2 is a side elevation of the turn-table and the screw-shaft and parts of the elevating mechanism, on a larger scale.
- Fig.3 is a plan of Fig. 2 without the ladder and with parts broken away to show the construction beneath.
- Fig.- 4 is an enlarged detail view of one of the hinged connections with the foot of the ladder rails.
- A is the revolving ring or upper movable part of a turn-table upon which at the present.
- the nut has trunnions E E, that extend through the guides and take the rollers D, each trunnion being long enough to project beyond its roller outside,in order that the end of the rod or bar G, connecting with the end of the ladder,may be suitably secured to it. From each trunnion,outside the guides, a stiff connection is thus made by means of such arod, G, with the lower end. or-foot of the side bar of the ladder at that side.
- the connection at the trunnion end is an eye, 9, and at the ladder end a hinge-joint, H.
- the construction of the joint I have produced for this connection is seen more particularly in Figs. 2 and 4..
- the part H is a strap or flat plate, with screwholes for fastening it to the foot, and with two knuckles, h, on the outer end, that are formed by slotting the end of the strap-plate, and then bending the two ends downward and underneath the plate.
- the eye g in the end of the rod is fitted the eye g in the end of the rod, and the pin forms the pintle of the joint.
- the rollers are formed with flat grooves of the same width as the face of the rails b, and with flanges d d, to run outside the edge of the rail. They are also set loose on the This construction secures evenness and steadiness of movement,and prevents twisting and other irregularity of movement of the nut'on the screw-shaft.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Description
7 ,(No Model.) E
' .D. D. HAYES.
N Hill 7 5 E E d.
' nununu nunnEnm I o T193.
Witnesses: E 1 Inflemur:
UNITED STATES :PATENT OFFICE.
DANIEL D. HAYES, OF OAKLAND, CALIFORNIA.
EXTENSION FIRE-LADDER.
SPECIFICATION forming part of LettersPatent No. 345,686, dated July 20, 1886.
Application filed December 16, 1885. Serial No.185,865. (No model.)
.T all whom/it ntay concern:
Be it known that I, DANIEL D. HAYES, a citizen of the United States, residing in the city of Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Extension Fire-Ladders, of which the followingisa specification.
My invention relates to improvements made in mechanism for raising and lowering a hinged tions atthe jointsare features ofthis improvement.
I construct, apply, and carry out my invention in the following manner, the drawings that form part of this specification being referred to by figures and letters.
Figure 1 represents the improvement applied to a hinged fire-ladder on a truck, and shows the position of the parts with the ladder raised to .the vertical position. Fig. 2 is a side elevation of the turn-table and the screw-shaft and parts of the elevating mechanism, on a larger scale. Fig.3 is a plan of Fig. 2 without the ladder and with parts broken away to show the construction beneath. Fig.- 4 is an enlarged detail view of one of the hinged connections with the foot of the ladder rails.
A is the revolving ring or upper movable part of a turn-table upon which at the present.
7 time fire-ladders of the best construction are posite sides of the screw-shafato give a slotted trunnions.
way on each side for the full length of travel of the nut E. The nut has trunnions E E, that extend through the guides and take the rollers D, each trunnion being long enough to project beyond its roller outside,in order that the end of the rod or bar G, connecting with the end of the ladder,may be suitably secured to it. From each trunnion,outside the guides, a stiff connection is thus made by means of such arod, G, with the lower end. or-foot of the side bar of the ladder at that side. The connection at the trunnion end is an eye, 9, and at the ladder end a hinge-joint, H. The construction of the joint I have produced for this connection is seen more particularly in Figs. 2 and 4..
The part H is a strap or flat plate, with screwholes for fastening it to the foot, and with two knuckles, h, on the outer end, that are formed by slotting the end of the strap-plate, and then bending the two ends downward and underneath the plate. Into the space between the two knuckles is fitted the eye g in the end of the rod, and the pin forms the pintle of the joint. The rollers are formed with flat grooves of the same width as the face of the rails b, and with flanges d d, to run outside the edge of the rail. They are also set loose on the This construction secures evenness and steadiness of movement,and prevents twisting and other irregularity of movement of the nut'on the screw-shaft. It also relieves the shaft from the weight and strain of the ladderduring operation. By this construc tion it will be seen that the shank of the screw operates only in one bearing or sleeve, which latter is connected to the front of the turntable; also, that the grooved rollers working in the ways keep the traveling nut in its proper position.
Having thus described my invention, what I claim, and desire to secure by Letters PatQ ent, is
1. The combination of the screw-shaft, the traveling nut E, provided with trunnions E E therollers D D, having projecting flanges d d, and carried by the trunnions, the slotted parallel guides B for the said rollers; and The connecting-bars G, having an eye at one end for attachment tothe'trunnions, and a hingejoint at the other to form a hinged connection at the foot ofthe ladder, substantially as shown and described.
2. In a' fire ladder, the slotted guides B, 5 formed by the spaced top and bottom rails, 12,
connected by bolts 0 and sleeves 0*, in combination with the traveling nut E, having trunnions E E and carrying grooved flanged rollers D D, substantially as shown and described.
In testimony that I claim the foregoing I [0 have hereunto set; my hand and seal.
DANIEL D. HAYES. [L 8.]
\Vitnesses:
O. W. M. SMITH, JAMES L. KING.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US345686A true US345686A (en) | 1886-07-20 |
Family
ID=2414754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US345686D Expired - Lifetime US345686A (en) | Extension fire-ladder |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US345686A (en) |
-
0
- US US345686D patent/US345686A/en not_active Expired - Lifetime
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