US2492511A - Fire escape - Google Patents
Fire escape Download PDFInfo
- Publication number
- US2492511A US2492511A US647470A US64747046A US2492511A US 2492511 A US2492511 A US 2492511A US 647470 A US647470 A US 647470A US 64747046 A US64747046 A US 64747046A US 2492511 A US2492511 A US 2492511A
- Authority
- US
- United States
- Prior art keywords
- fire escape
- movable member
- movable
- latch
- tongues
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
- E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
- E06C9/08—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members
- E06C9/085—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members ladders unfolded in the direction of the longitudinal members
Definitions
- FIG. 1 is a side elevation of the fire escape set up for use, portions being broken away and the position of the parts when the fire escape is collapsed, being indicated by broken lines.
- Figure 2 is a front elevation of the structure shown in Figure 1.
- Figure 3 is an enlarged section on line 3-3, Figure 1, the collapsed position being indicated by broken lines.
- Figure 4 is a section through a portion of the ladder taken on the line 4-4 Figure 3.
- Figure 5 is an enlarged side elevation of the latch portion of the fire escape.
- Figure 6 is a front elevation of the structure shown in Figure 5, a fire escape being shown secured in collapsed position.
- FIG. 1 designates a channeled main member of such length as to extend from a point adjacent to the ground or other receiving surface thereunder to the uppermost point to be reached by the fire escape.
- This main channeled strip I can be fastened fiat against a wall W in any suitable manner so as to be rigid relative thereto.
- transverse hinge bolts 2 Extending through the main channel member I at regular intervals are transverse hinge bolts 2 and pivotally mounted on each of these bolts is a sleeve 3 provided at one end of a short arm 4 extending at right angles from one end of a step 5.
- the length of the arm 4 is equal to or less than the depth ofthe channel thestrip. 'I.' but the steps 5lfarerQf Suh lengththat; whenextendfe ed at. right. angles'tnthestrip I,, will extend; a considerable distance them beyond.
- Tothe outer ends of each. ofthesteps 5' is .pivotally none nested an: outer or movable channeled strips;
- connection being, effi'eicted'by means-of trans, verse Divot or" hinge bolts. 1 extendingthrough.
- Keepers'in theTm-m-"of laterally extended-"studs l5 are located at the sides of the main strip I and are so positioned that when the movable strip 6 is swung upwardly and backwardly toward the strip I so as to straddle it, the tongues I3 can be swung upwardly and backwardly by means of the plates I2 so that the studs I5 or keepers will be received by the notches I4.
- the latch plates I2 are located past their dead centers so that the tongues are maintained in engagement with their keepers or studs I5 as shown for example by broken lines in Figure 1 and full lines in Figure 5. With the parts thus located all of the steps will be housed between the strips I and 6, the steps 5 being extended upwardly within the strips or the arms 4 extending forwardly as shown by broken lines in Figure 5.
- the movable member 6 When it is desired to use the fire escape the movable member 6 is unlocked from the stationary member I by pushing outwardly on the latch plate or plates I2 so that the notched tongues I3 thus will become disengaged from their keepers [5.
- the tongues can be caused to lift ofi of their keepers due to the fact that the notches I4 have inclined walls which would act to deflect the tongues upwardly if subjected to excessive outward force.
- a stationary member In a fire escape a stationary member, upper and lower movable members, steps hingedly connected at their opposite ends to the stationary member and to the movable members for swinging of the movable members away from the stationary member to provide a ladder, a latch plate pivoted at the-upper end of the lower member and including a. friction latch normally engaging the stationary member and releasable by pull exerted in a direction away from the stationary member, said latch plate being extended upwardly to overlie the lower end of the upper member so as to receive pressure from the upper member when from movable member 16 overlies the outer surface of member 6.
- Member 6 has secured to its inner surface, by means of rivet ILa shoe I8 that extends downwardly into engagement with the inner surface of the lower member 16.
- ffire escape is to be understood as intended to the upper member is freed for swinging away from the stationary member, and means at the lower .end of the upper member for releasing the latch comprising a shoe extending downwardly from the lower end of the upper member and adapted to exert outward pressure against the lower member when said upper member is released for outward swinging.
Description
Dec. 27, 1949 w. w. YEHLING 2,492,511
FIRE ESCAPE Filed Feb. 14, 1946' 2 Sheets-Sheet 1 WT fl/i'leizlirg INVEN TOR.
BY 6% Q 4 Dec. 27, 1949 w. w. YEHLING FIRE ESCAPE 2 Sheets-Sheet 2 Filed Feb. 14, l946 main/zany INVENTOR.
Patented Dec. 27, 1949 rmes sra f I WilliamW. Yehling, Spokane, Wash; mammalian, 1946 ,.S81'ia11 no; 54mm into active position at which time it assumes the form of asubstantiallyverticali ladder;
With the foregoingand other, objects. in view which willappem' asthe' descriptionproceeds,;the invention consists of certain novel details .of construction and combinations of'parts; hereinafter morefully-described and pointed outinthe claim, it being understoodthataachanges may be made in. the construction and arrangement of.
parts without departing from "the. spiriteof' the" invention as "claimed:
In the accompanying drawing the preferred form of the invention has been shown.
In said drawing Figure 1 is a side elevation of the fire escape set up for use, portions being broken away and the position of the parts when the fire escape is collapsed, being indicated by broken lines.
Figure 2 is a front elevation of the structure shown in Figure 1.
Figure 3 is an enlarged section on line 3-3, Figure 1, the collapsed position being indicated by broken lines.
Figure 4 is a section through a portion of the ladder taken on the line 4-4 Figure 3.
Figure 5 is an enlarged side elevation of the latch portion of the fire escape.
Figure 6 is a front elevation of the structure shown in Figure 5, a fire escape being shown secured in collapsed position.
Referring to the figures by characters of reference I designates a channeled main member of such length as to extend from a point adjacent to the ground or other receiving surface thereunder to the uppermost point to be reached by the fire escape. This main channeled strip I can be fastened fiat against a wall W in any suitable manner so as to be rigid relative thereto.
Extending through the main channel member I at regular intervals are transverse hinge bolts 2 and pivotally mounted on each of these bolts is a sleeve 3 provided at one end of a short arm 4 extending at right angles from one end of a step 5. The length of the arm 4 is equal to or less than the depth ofthe channel thestrip. 'I.' but the steps 5lfarerQf Suh lengththat; whenextendfe ed at. right. angles'tnthestrip I,, will extend; a considerable distance them beyond. Tothe outer ends of each. ofthesteps 5' is .pivotally none nested an: outer or movable channeled strips;
the connection being, effi'eicted'by means-of trans, verse Divot or" hinge bolts. 1 extendingthrough.
Keepers'in theTm-m-"of laterally extended-"studs l5 are located at the sides of the main strip I and are so positioned that when the movable strip 6 is swung upwardly and backwardly toward the strip I so as to straddle it, the tongues I3 can be swung upwardly and backwardly by means of the plates I2 so that the studs I5 or keepers will be received by the notches I4. At this time the latch plates I2 are located past their dead centers so that the tongues are maintained in engagement with their keepers or studs I5 as shown for example by broken lines in Figure 1 and full lines in Figure 5. With the parts thus located all of the steps will be housed between the strips I and 6, the steps 5 being extended upwardly within the strips or the arms 4 extending forwardly as shown by broken lines in Figure 5. a
When it is desired to use the fire escape the movable member 6 is unlocked from the stationary member I by pushing outwardly on the latch plate or plates I2 so that the notched tongues I3 thus will become disengaged from their keepers [5. However by exerting sufhcient outward pressure against the movable member of the fire escape the tongues can be caused to lift ofi of their keepers due to the fact that the notches I4 have inclined walls which would act to deflect the tongues upwardly if subjected to excessive outward force.
When the movable member is pushed outwardly from the fixed member I it will swing downwardly,
the steps 5 and the arms 4 serving as connecting links between them, and this movement will conbe noted that a means is provided whereby automatic latch release of a lower movable member is caused by release of the movable member next above for outward swinging. The upper movable member 6 is disposed above movable member 16 next below. Latch plate l2 extending upwardly 10 With further reference to Figs. 5. and 6, it should 4 apply to all forms of ladders within the scope of the claim.
What is claimed is:
In a fire escape a stationary member, upper and lower movable members, steps hingedly connected at their opposite ends to the stationary member and to the movable members for swinging of the movable members away from the stationary member to provide a ladder, a latch plate pivoted at the-upper end of the lower member and including a. friction latch normally engaging the stationary member and releasable by pull exerted in a direction away from the stationary member, said latch plate being extended upwardly to overlie the lower end of the upper member so as to receive pressure from the upper member when from movable member 16 overlies the outer surface of member 6. Member 6 has secured to its inner surface, by means of rivet ILa shoe I8 that extends downwardly into engagement with the inner surface of the lower member 16. Accordingly, assuming that the uppermost movable member is released for outward swinging, and is no longer latched to and supported by the stationary member, said uppermost movable member'will exert outward pressure against the upwardly extended latch plate of the movable member next below. Additionally, shoe I8 will also exert outward pressure against the movable member next below, and the result will be that tongues [3 of said lower movable member, constituting a friction latch, will be given pull'in a direction away from the stationary member, and such pull will be sufficiently strong to disengage the latch. Thus,- each movable member automatically unlatches the movable member next below, and this is carried out all the way down the building.
' While this invention has been described more especially as a fire escape, it is to be understood that it can be used in many places where foldable ladders are desirable. Therefore the term ffire escape is to be understood as intended to the upper member is freed for swinging away from the stationary member, and means at the lower .end of the upper member for releasing the latch comprising a shoe extending downwardly from the lower end of the upper member and adapted to exert outward pressure against the lower member when said upper member is released for outward swinging.
WILLIAM W. YEHLING.
REFERENCES CITED The following references are of record in the file of this patent:
- UNITED STATES PATENTS
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US647470A US2492511A (en) | 1946-02-14 | 1946-02-14 | Fire escape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US647470A US2492511A (en) | 1946-02-14 | 1946-02-14 | Fire escape |
Publications (1)
Publication Number | Publication Date |
---|---|
US2492511A true US2492511A (en) | 1949-12-27 |
Family
ID=24597125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US647470A Expired - Lifetime US2492511A (en) | 1946-02-14 | 1946-02-14 | Fire escape |
Country Status (1)
Country | Link |
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US (1) | US2492511A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962113A (en) * | 1958-02-28 | 1960-11-29 | Courad D Heimlicher | Folding ladder and multi-directional latch therefor |
US3024864A (en) * | 1959-11-18 | 1962-03-13 | B & R Ladder Entpr Inc | Folding ladder |
US4678060A (en) * | 1986-08-25 | 1987-07-07 | Pugliese Joseph A | Collapsible ladder device |
NL1019479C2 (en) * | 2001-12-03 | 2003-06-04 | Hulsman Brandtrappen V O F | Emergency stairs. |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US278301A (en) * | 1883-05-22 | David welsh | ||
US289876A (en) * | 1883-12-11 | Fire-escape ladder | ||
US691520A (en) * | 1901-04-24 | 1902-01-21 | George E Ballard | Latch. |
US704126A (en) * | 1901-10-01 | 1902-07-08 | Gustav Seessle | Fire-escape. |
US758441A (en) * | 1903-10-14 | 1904-04-26 | Harry Harden | Latch. |
US785810A (en) * | 1904-07-19 | 1905-03-28 | Peter Koopman | Ladder. |
-
1946
- 1946-02-14 US US647470A patent/US2492511A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US278301A (en) * | 1883-05-22 | David welsh | ||
US289876A (en) * | 1883-12-11 | Fire-escape ladder | ||
US691520A (en) * | 1901-04-24 | 1902-01-21 | George E Ballard | Latch. |
US704126A (en) * | 1901-10-01 | 1902-07-08 | Gustav Seessle | Fire-escape. |
US758441A (en) * | 1903-10-14 | 1904-04-26 | Harry Harden | Latch. |
US785810A (en) * | 1904-07-19 | 1905-03-28 | Peter Koopman | Ladder. |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962113A (en) * | 1958-02-28 | 1960-11-29 | Courad D Heimlicher | Folding ladder and multi-directional latch therefor |
US3024864A (en) * | 1959-11-18 | 1962-03-13 | B & R Ladder Entpr Inc | Folding ladder |
US4678060A (en) * | 1986-08-25 | 1987-07-07 | Pugliese Joseph A | Collapsible ladder device |
NL1019479C2 (en) * | 2001-12-03 | 2003-06-04 | Hulsman Brandtrappen V O F | Emergency stairs. |
WO2003048500A1 (en) * | 2001-12-03 | 2003-06-12 | Hulsman Brandtrappen V.O.F. | Emergency stepladder |
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