US1831332A - Pole ladder - Google Patents

Description

NOV. 10, 193,1. Q B, WAGNER 1,831,332

' POLE LADDER Filed'June 25, 1930 2 sheets-sheet 1 i l *m a fl Inventor C: W0 er NOV. 10, 1931. C, B. WAGNER 1,831,332

POLE LADDER Filed June 23, 1930 .2 Sheets-Sheet 2 l ../x o H o mlf u' lf W By ,@Mmz@ A llorney Patented Nov. l0, 1931 CHARLES BRYAN WAGNER, 0F SPRING MILLS, PENNSYLVANIA POLE LADDER Application filed June 23,

This invention relates to newl and useful improvements in pole ladders particularly for use on telephone, telegraph and electric poles, but it is to be understood that a ladder `iii accordance with this invention may be utilized for any purpose for which the same isV found adapted and desirable. l 'An important feature of the invention rei Vsides in the provision of a housing or casing Vwhich is permanently mounted on the pole having pivotally mounted for Aswinging movement therein a series of steps. which are operatively connected together in a manner to permit the same to be simultaneously swung to operative or inoperative position.

AAnother important featureV of the inventionresides inthe provision of resilient means `for automatically returning tlie steps to inoperative position within the housing where i 20 the same are out ofthe way.

, ,Other objects of the invention are to provide a pole ladder of the aforementioned Vcharacter which will be' simple in construction, strong, durable, efficient in its use and i ,25 which may be manufactured at comparative- 1y low cost. v

All of the foregoing and still further objects and advantages of the invention may become apparent from a study of the follow- 1 -30 ing specification, taken inyconnection with the accompanying drawings wherein like characters of reference designate corresponding part-s throughout the several views, and whereina 1 Figure l is a view in side elevation showing :a ladder constructed in accordance'with this invention mounted inposition on thepole with the steps infinop'erative position within the'housing orcasing. s

Figure 2 is a view in side elevation of the Adevice with the steps swung outwardly to operative position. T y v f Fgure 3 is a detailv view in elevation show-` ingfthe' ladder `removed from the housing.

V 45j vFigure 4 is a fragmentary sectionalyiew in operative or inoperative position. In ythis 1930. vSerial N0. 463,179.`

on an enlarged scale showing one of the steps in Yinoperative or retracted position in the housingand means for securing the same therein. s Figure 5 is a fragmentary detail viewfin section showing onev of the steps inoperative Position. j v

Referring to tlie drawings in detail, it will be seen that the reference numeral l designates a pole upon the upper endportion of which istmounted a cross arm 2 which is 55 braced b y the members 3. A housing 4 of substantially Ueshaped horizontal cross section is rigidly secured longitudinally on the pole l `by the bolts 5.. i

4.A series of steps 6 are pivotally mounted 60 -for swinging movement in vertically spaced relation on thejtransversely extending pins 7 in the housing or casing 4, said pins Textending vertically through the hub portion 8 formed integrally on the said steps 6.l `The '65V .steps 6 are provided with upturned free end portions 9 to prevent slipping therefrom. The hub portion 8 of each `step 6hasformed therein `an angular recess which is indicated to advantage in broken lines in Figure 5 of 70 the drawings,lsaid recess providing furcations 10 lbetween which extends the operating rod 1l which is pivotally connected to the furcations as at l2. The inner walls of the recess which'forms the fui-cations l0 is of 5 right angular formation, as indicated at 13 and the angles of said walls are adapted for abutting engagement with the adjacent sides of the operating rod 11 when the'step's 6 are manner the outward swinging movement of the steps 6 is limited in a mannerto maintain said steps in a horizontal position.

At its lower'` end portionthe housing or easing 4 is provided with a partition wall 14V havinga polygonal opening through which slidably extends the threaded'shank 1,5 lia`ving a nut 16 threaded for adjustment on its lower end portion for supporting awasher 17. At its upper end the shank 15 is forked and pivotally connected to the rod 11 as at 18. A coiled spring 19 encircles the shank 15 and has one end engaged on the washer 17 and its upper' end engaged with the partition 14 in a manner to yieldingly urge the shank 15 and the rod 11 downwardly.

A hook 2O is loosely mounted for swinging movement on the lower portion of the cas-- ing or housing 4 and is engageable with the apertured ear 21 on the free end portion of the lowermost step for retaining said step in extended or operative position against the tension of the coiled spring 19. Formed integrally on the tree ledgeslof the housing '4 are the a ertured ears 22 for the passage of a remova le pin 22 for providing positive means for retaining the steps in inoperative or retracted position in the casing or housing, said pin 22 being engageable with one of the steps as clearly seen in Figure 4 of the drawings.

As will be readily apparent, when it is desired to use the Vladder. the pin 22 is removed and whenoneot the steps is swung outwardly to horizontal position the movement is transmitted to all of the .steps through the rod 11. The hook 20 is then engaged in the ear 21 and the steps are thus maintained in horizontal position. When through using the ladder, the hook 2O is disengaged rom the apertured ear 21 and the coil spring 19 will move the shank 15 and the rod 11 downwardly andl thus swing the steps upwardly to a position within the hous ing or casing 4. The pin 22 is then reinserted in the a ertured ears and the steps are thus positively secured in retracted position and outof the way. e Y

It is believed that the many advantages of a pole ladder constructed in accordance with this invention will be readily understood, and

Valthough the preferred embodiment of the invention is as illustrated and described, it is to be'understood that changes in the details of constructiony may be had which will fall within the scope of the invention as claimed.

What is claimed is 1. A pole ladder of the character describe comprising an elongated housing of substantially U-shaped cross section mounted longitudinally on the pole, a series ofsteps pivotally mounted in vertically spaced relation for swinging movement into and out of thehousing, an elongated rod pivotally connected to each of the steps and constituting means for operatively connecting said steps together for simultaneous operation, and resilient means operatively engaged with the rod in a manner to yieldingly urge the samein adireetion to move the steps to inoperative position within the housing.

2. A pole ladder of the character described i comprising an elongated housing open at its front and adaptedto be mounted vertically on the pole, a series of steps pivotally mounted in vertically spaced relation for swinging movement into and out of the housing, said steps having one end portion slotted in a manner to provide furcations,.an elongated rod extending through the slots and pivotally connected to the turcations, said rods constituting means for swinging the steps to both operative and inoperative position, certain of the walls ot' the slots engageable with the elongated rod in a manner to limit the swinging movement of the steps and maintain the same in a substantially horizontal position When swung outwardlyfrom the housing.

3. A pole ladder of the character described comprising an elongated housing open at its front and adapted to be mounted vertically on the pole, a series of steps pivotally mounted in vertically spaced relation for swinging movement into and out of the housiny said steps having one end portion slotte( in a manner to provide urcations, -an elongated rod extending through the slots and pivotally connected to the urcations, said rods con- 190 stituting means 'for swinging the steps to Y both operative and inoperative position, certain oi the walls of the slots engageable'with the elongated rod in a manner to limit the swinging movement of the steps and main- Q5 tain the same in a substantially horizontal position when swung outwardlyV from the housing, means mounted on the housing for releasably securing the steps in operative position, means mounted on the housing for' releasably maintaining the steps in inoperative position, and resilient means operatively crou- `pled to the rodV for yieldingly urging said rod in a direction to move the steps to inoperative position in the housing.

4. A pole ladder of the character described comprising an elongated housing open at'its front and adapted to be mounted vertically on the pole, a series of steps pivotally mounted in vertically spaced relation for swinging movement into and out of the housing, said steps having one end portion slotted in a manner to provide furcations, an elongated rod extending through the slots and pivotally connected to the urcations, said rods con-1' stituting means for swinging the steps to both operative and inoperative position, certain of the walls of the slots enga-geable with the elongated rod in a manner to limit the swinging movement ofthe steps and main' tain "the same in al substantiall horizontal position when swung outward y from the housing, means mounted on the housing for releasably securingthe steps in operative position, means mounted on the housing for releasably maintaining the steps in inoperative position, and resilient means operatively coupled to the rod for yieldingly urging said rod in a direction to move thel steps to inoperative position in the housing, said means' com rising a partition formed integrallyin the ower end portion-of the houslng, said partition havinor an opening therethrough, a threaded shan connected to the lower end portion of the elongated rod and extending slidably through the opening in the partition,

a washer mounted for adjustment on the shank in opposed relation to the partition, and a coil spring mounted on the shank and en aged with the washer and the partition. n testimony whereof I aiix my signature.

CHARLES BRYAN WAGNER.

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