US1402942A - Pavement - Google Patents

Description

W. T. IVIAIRGETTS.

PAVEMENT.

APPLICATION FILED MAR. 7. I9I7. 1,402,942. Patented Jan. 10, 1922.

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Application led March 7, 1917. Serial No. 152,984.`

To all wlw/m, it 'may concern.'

Be it known that l, 1W AL'rnn T. Mansnrrs, a citizen of the United States" ofv America, residing at New York, New York County, New York., have invented new and useful pavements, of which the following is a. speciication.

This invention relates to paving.

rifhis invention has utility in the produc'- tion of pavement involving dissimilar materials as wood and stone or brick.

Referring to the drawings:

Fig. l is a perspective view showing the features' of pavement production as to mode of laying;

Fig. 2 is a fragmentary perspective view of the pavement completed by use7 the pavement of Figs. 1 and 2 being especially adapted for the utilization of old paving blocks as of granite or other stone;

Fig. 3 is a view similar to Fig. l with bricks as the inorganic or relatively frangible material to be alternated with the wood; and

Fig. fl is a fragmentary perspective View of the pavement of Fig. 3 when worn to completed condition.

In the production of pavements as herein disclosed, it is desirable to provide a substantial foundation l, say of concrete, adequate to carry the loads and having` its surface determined as to the grade of the finished pavement. In the building on this base of a pavement embodying 4say old granite paving blocks, it is desirable to spread over the concrete base, a moist mortar bed 2 of sand and cement, and dispose in parallel rows on this moist bed, the granite blocks 3 with the space 4l between each row.

The setting of these blocks may be followed up by filling into the spaces 4 moist mortar 5 up to a grade say 3% below the top of the granite block if all deep wood block 6 is to be used. This filling of moist mortar bed 5 of sand and cement is tamped well into the spaces 4 to determine the proper level.

The wood blocks 6 are set to break joints with the granite blocks 3 and are setto have their grain up and further are provided with the expansible end take up or ribs 7, and placed into position in then spaces 4 above the moist mortar bed 5. The blocks may be pushed down? say at the iniJ Specification of Letters Patent.

working to a straightsurface with the wood ratentea aan. io?, asas.

tial setting to about iff exposed, then with a broad rammer be brought downv to have their top level about el above the granite blocks.` The incomplete paving surfaceprovided by the granite blocks 3 completed by these alternating rows of wood paving blocks f5, say impregnated with cr'eosote` or nient to a level wear-olf surface for the trailic which forces this iiller to occupy all .interstices and gra dually wear down to work a uniform level 'of pavement through the topping. y

The interaction between the relatively frangible inorganic blocks 3 and the relatively tough vorganic impregnated wood blocks 6 results in the inorganic blocks 3, say if from loldroad work and rounded, in

blocks which wood blocks swell up or conform to the edges of the granite blocks in such a way as to protect such edges from fracture.

There is further utility in that these wood blocks with grain up have their maximum expansion regions in the plane of the pave nient thus assisting in gripping laterally7 to save the granite block edges, but further 3o-operating longitudinally to a greater eX- tent. The expansion of the wood blocks in the longer dimension direction is partially taken up by the crus'hable lugs 7. However, in the squeezing of the wood blocks by the more rigid earthen blocks, there results a -mutual interaction for distributing the load throughout the pavement.

This is a feature of utility in pavement life maintenance and is further evidenced as of great utility in its cooperation with track work in the street. The rails are so squeezed as to be held against vibration. There is enoughwood in the pavement as directly coacting with the base for effectively deadening sound transmission. This v gripping `effect with a desirable anti-skid pavement has even greater utility in the special work along the street railway lines holding the rails and switches at turns and cross-overs against the working loose due to the severe traffic to which they are subjected thereby materially lengthening the life of such installations.

There may be in this gripping action for distributing the load on the granite blocks and the wood blocks, a kind of arched action in the bind due to the snug expansion fitting say between the rails 9, 10.

The granite blocks, initially rounded if secondhand as shown in Fig. l, in the automatic finishing of the pavement appear as the truly.v surfaced blocks 1l7 Fig. 2, brought to the surface of the wood paving blocks 6 which have their terminal lugs 7 more or less compacted according to the crushing strain.

This great utility in the utilization of old paving stones as well as new is also present in the vitrified or clay product paving blocks 12 incorporated with the wood blocks 6 as shown in Fig. 8,the laying of which may occur in a similar manner as of the granite blocks 3 except that the paving base `may not need any supplemental filling in the spaces 4 or the pavement may be laid direct upon a uniform pavement base.

The Wood strengthens and gives life toK the brick, for the weakness 0f the brick is not present. The wood `of the block precludes any beating or breaking off of the brick block edges. The slippery features ofthe impregnated wood lblocks do not develop as objectionable skidding qualities in the combined pavement because the stone or brick anti-skid feature provides a surface for ready adherence of heavy vehicle traffic aswell as rapidly moving cars.

This pavement of dissimilar blocks, accordingly, is one of great load carrying strength, of practically permanent life in it-V self las it seals the base from moisture attacks, is sanitary in that it is readily and thoroughly cleaned even by flushing,v and amalgamates as a unit for carrying the load and stiffening railway tracks:

What is claimed and it is desired to secure by Letters Patent is:

1. A pavement embodying a foundation, spaced rows of earthen blocks on said foundation, grain-up wood blocks disposed in said spaces to complete the pavement as to pavement extent, said wood blocks protruding above the earthen blocks, and a surfacing material over the earthen blocks adapted to be worn down by trafiic as the protruding portions of the wood blocks are worked into protecting position for the edges of the earthen blocks.

2. The method of completing a pavement embodying installing an uneven surface grain up wood block and earthen block pavement, with the wood blocks protruding above the earthen blocks, and coating the uneven surface, whereby wearing down said coating and the protruding wood block upper ends protect the edges of the earthen blocks. A

In witness whereof I affix my signature.

WALTER T. MARGETTS.

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