USRE11889E - Bridge or wharf floor construction - Google Patents

Description

Beissued Feb. 12, IQ'DI.

m. |,aa9.

4 J. a. McMILLAN.

BRIDGE-0R WIIARF FLUURDUNSTRUCTIUN.

(Applicatioh mod 28, 1900.)

:ois afterward placed thereon and which forms a surfaceandso channeled as to form alock 4 .struction. Fig. 2 is a plan view of the ti-mberfto wear it is very soon destroyed and must be soon broken up and destroyed by the spring NITED STATES PAT lt liilif t (JOHN G. MCMILLAN, or

BRIDGE OR WHARF Fl SPECIFICATION forming part of Reissued Let toloe senate "LIFORNIA;

series,

are Patent No. 11,889, dateil Edebruary 12, 1901.

Original No. 617,471, dated January 10, 189 91.. Applies tion ftrreissue filed-October. 23, 1900v serial No. 34,69?

To all whom it may concern: i

' Be it known that I, JOHN GILMORE MCMIL- LAN, a citizen of the United States, residing at San Jos, county of Santa Clara, State of California, have invented an Improvementin Bridge or Wharf Floor Constructions; and I hereby declare the following to bee full, clear, 5 and exact description of the same.

.My invention relates to improvements in the construction of floors for bridges,wharves and other structures requiring a door that will resist a great amount of wear; and it con sists, essentially, of lengths of timber laid upon supporting joists or girders orupon any suitable timber-work, the strips to be. spiked together in continuous succession and to be alternately of a greater and less height, so, as to form channels between for the reception of the asphalt or cement surface, which the wearing-surface of the structure.

Referring to the accompanying drawings, Figure 1 iea general view showing the con-.

work I In the usual construction of bridges, wharvemsand other structures, over which travel passes, if the plank surface is exposed freqnentlyrreplaced, and if it isattempted to cover-"this surface with cement, asphalt, or other-good wearing protective substance it is of theEplank composing the floor, soihat'any surface of this sort which is employed-soonbecomes broken, disintegrated, and useless,

The object of myinvention is to provide a solid continuous floor adapted tqreceive such by which: the'covering material is united with the floor and becomesan integral part of it.

The floor is composed of main timber C, which are made of any suitable height, depth, and thickness that may be necessary to support the required load. Intermediate between. these timbers are fixed the longitudinal timlongitudinal grooves or channels between the main timbers.

In the present case A represents a trans-- verse beam or girder, and B are timbers rest- I ing thereon and beveled. or-deelining from the center to the sides to provide the prcper crown. l g

X The chan neis may be rectangular, as shown, or the sides of the main timbers may be formed near the top, so that the channels are slightly dovetail in shape to increase iheefficiency of the lock for the surface compound.

The'timbers may he laid so as to break joints, and the structure when secured together formsa tight unyielding floor. The surface is then completed by a covering. of

cement, artificial stone, asphalt, or otherj'suitable material for a wearing-surface, which. may be laid of any desired thickness, and it will fill the longitudinal channels, the'surface being level or prepared any way to make a foothold forhorses or otherwise form asuit able surface for travel. A floorithus constructed beingunyielding, the wearing-sur- 'face will not be cracked or broken, and the whole structure is practically a unit.

'Having thus described my invention, what :I claim as new, and desire to secure by Letters Patent, is- I 1. floor for bridges and wharves, consisting of beams, transverse to the floor, forming sills,'timbers laid on edge, with intermediate timbers of less height secured thereto and-formingchannels, said timbers and intermediate timbers secured directly together in continuous succession from one portionof the floor to the other to form a rigid inseparable structure, anda plastic covering spread ,o ver the surface andfilling saidchannel's'.

2. A floor for bridges consisting of supporting-beamsmadehigher in the center than at each end, longitudinal timbers laid on edge upon said floor-beams with intermediate timbers of less height rigidly'secn red thereto and forming longitudinal channels, said timbers and intermediate timbers being laid andsebers D, which are made of less height, and these are solidly nailed or spiked together,

cured together in continuonssuccession from {lone portion of the floor to'the other, and a plastic. covering spreadover the surface and filling said channels sulmtamially'as (Llescribed.

3. A floor sgm'ueuu-e consisting of prilnafy supports, timbers laid on wige t1 W301], \vil th intermediate timbers of less height socurd thereto m form channels between Elm highez' limbs aid first-named iinabez and the in 'termedlzste timbers be laid d secured 503M116 in continue-us S116! tially from one pox-Linn 0f the swuomz-e in lo the other, and a plasma coveriugspread over -?he surfape filling said channels In Witfi'ess whereof I have herunto set my hand. 1

- JOHN G MOMILLAN.

Witnesses:

"ALFRED A. ENQUIST,

H. Nam-ism.

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