US1639210A

US1639210A - Manhole step

Info

Publication number: US1639210A
Application number: US150053A
Authority: US
Inventors: Chalmers S Brown
Original assignee: Brown and Brown Inc
Current assignee: Brown and Brown Inc
Priority date: 1926-11-22
Filing date: 1926-11-22
Publication date: 1927-08-16
Anticipated expiration: 1944-08-16

Description

Ang; 16, 1927.

Y 1,639210 C. S. BROWN MANI-[OLE STEP Filed Nov. 22, 192e f a@ 1 ux@ attozweq Patented Aug. 16, 1927.

UNITED .STATES PATENT OFFICE.

CHALMERS s. BROWN, or LIMA, omo, AssIGNoR 'ro BROWN AND BROWN, INC.. 'or' LIMA, oHIo, A coRPoRA'rIoN or omo;

MANHOLE STEP.

Application filed November 2.2, 1926. Serial No. 150,053.

This inventiony relates to. manhole steps and more particularly to a cast metal step adapted to be built into walls of masonry used in forming manholes. e

Manhole steps are usually formed by bending bars of iron into substantially U- shaped form and embedding the ends of the bars in the mortar between t-he bricks. Such steps are disadvantageous f-or the reason 1o that they deteriorate very rapidly and break adjacent the wall. f Accordingly it is an important object of the present invention to,k provide a cast step which possesses great strength and durability and which is adapted to be readily built into the wall during the erection th-ereof.

A further object is to provide a step having a plurality of feet upon which it is adapted to rest while the wall is being completed around the step.

A further object is to provide a step of cast iron or the like formed substantially U-shaped to provide arms which are adapted to be embedded in the mortar between the bricks or the like which form the wall.

Other objects and advantages Iof the invention will becomeY apparent during the course of the following description.

In thedrawings I have' shown. one embodiment of the invention. In this showing, Figure 1 is a vertical sectional view through a wall showing two ofthe devices in position,

Figure 2 is a plan view, and, lFigure 3 is a detail perspective of the ste Ieferring to the drawings, 'the numeral l 10 designates a wall of masonry or the like formed of bricks 11 having mortar 12 placed therebetween. The device forming the subject matter of the present invention comprises a substantially U-shapedy step indicated as a whole by the numeral 13. The step includes an `outer tread member 14 roughened on its upper surface as at 15 to reduce the danger of slipping thereon, and n the ends of the tread are provided with guards 16 which also serveto prevent the foot of a person .from slipping from the ends of the tread. The device also includes arms 17 the upper porti-ons 18 of which are formed as horizontal flanges, each armvfurther being provided with vertical flanges y19 which terminate at their ends in feet 20.

a purpose to be described. Upturned lips 22 are preferably formed at the rear ends of the arms, as clearly shown in Figures Y 1 and 3.

In placing the device in position, the wall is built to a-desired level, whereupon the step is placed in position. It will be obvious that the portion of the step arranged within the wall is heavier than the projecting portion whereby the step is adapted to remain in position while thel mason is preparing to place further layers ofV bricks in position. The distance between the flanges 19 is preferably equal to the length of a brick or twice the width thereof, whereby these flanges occupypositions between the bricks as the latter are placed in position. f The feet 20 rest on one layer of bricks, and when the mortar is placed in position, it extends upwardly into the spaces between the feet 20 as will'be apparent. The'distance between the lower faces of the horizontal flanges 18 and the .lower extremities ofthe feet 20 is preferably equal to the thickness, of a brick, whereby it will be obvious that the flanges 18 lie in a plane between two adjacent courses'of bricks, and the spacebetween these flanges is filled with mortar. The lips 22 are adapted to engage against the outer4 face of the wall as shown vin Figure 1.

lOwing to the fact that the heavier portion of the device lies over the feet 20 it will be apparent that there is no tendency for the tread portion of the device to swing down- Y wardly, hencev any tendency which such swinging action would have to injureV the green mortar is eliminated.- From the foregoing it will be apparent that the device is'extremely simpleand durable in construction and readily ,may -be placed in position as the building of ay wall progresses. The tread 14 of eachstep is spaced from the wall whereby it is adapted ,to serveas a hand hold when aworkman is climbing up the steps. 1

It is tobe understood that the form yof the invention herewith shown. and. described lis to be taken as a preferred example of the same and that variouschanges in the shape, size and arrangement of parts may be resorted to without departingtfromthe spirit of the invention or the scope of the subupper horizontal ange portions and vertijoined claim. Cal depending {iange portions, each of said claim: depending iztnge portions including a plulf3 A device of the character described comrality of downwardly projecting feet. v 5 prising a substantially U-'shzlped east metal In testimony whereof aiix my signature.

step having the base portion thereorl formy ing n tread, the arms of Said step including CHALMERS S. BROWN.