US1060668A - Helmet for use in the driving of reinforced-concrete piles. - Google Patents

Description

' G. W. URAWSHAW.

HELMET FOR USE IN THE DRIVING or REINFORCED CONCRETE PILES.

APPLICATION FILED JULY6,1912. 1,060,668. Patented May 6, 1913.

5 SHEETB-SHBBT 1.

G. W. ORAWSHAW. HELMET FOR USE IN THE DRIVING 0P REINFORCED CONCRETE PILES. APPLICATION FILED JULY 6, 1912.

1,060,668. Patented May 6, 1913.

5 SHEETSSHEET 2.

G. W. GRAWSHAW. HELMET FOR USE IN THE DBIVING'OP REINFORCED OONOBBTB PILES.

nrmonrox rmzn JULY 6, 1m.

Patentd May 6, 1913.

W'Qw 7 m/wwmw IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII G.

G. W. GRAWSHAW. HELMET FOR USE IN THE DRIVING 0P REINFORCED CONCRETE PILES.

APPLICATION FILED JULY 6, 1912.

1,060,668. Patented May 6,1913.

5 SHEETS-SHEET 4.

G. W. ORAWSHAW. HELMET FOB. USE IN THE DRIVING 0F REINFORCED CONCRETE FILES.-

APPLICATION FILED JULY 6, 1912.

1,060,668. Patented May 6, 1913. 5 sums-sum 5.

fi I

wwfwi mmm WM UNITED STATES PATENT or 1 ennvAsE WATSON GRAWSHAW, or terms; nner-Ann;-

HELMET FOR usn IN THE DRIVING or REINFORCED-CONCRETE Finns.

Specification of Letters Patent.

' Patented May 6, 1913.

Application filed July 6, 1912. Serial No. 707,988. i

To all whom it may concern."

Be it known that I, GnRvAsE WA'rsoN CRAwsHAw, a subject of the King of Great Britain and Ireland, and resident of Leeds, England, have inventedcertain new and useful Improvements in Helmets for'Use in the Driving of Reinforced-Concrete Piles,

of which the following is a specification.

This invention refers to and consists of an improved construction of helmet foruse in the driving of reinforced concrete piles.

Heretofore, helmets for this purpose have comprised a'cast-iron box adapted, at one end, to fit over and inclose the top end of the pile, for about a foot, and at the other end adapted to stand above the end of the pile for another foot or so, the helmet, or box, being divided interiorly by a transverse partltion which bears against the end of the pile or against a filling of saw-dust, or the like, inserted between it and the end of the pile. Q

Into the upper projecting end of the helmet, or box, fits the lower end of a wooden dolly, thatis, a length of hard wood about three a scantling similar to that of the pile. Upon the upper end of the dolly 1s fitted an iron, or steel, hoop for preventing any. bursting of the wood under the impact of the monkey, or hammer, by which the driving of the pile is efiected. With such construction of helmet or boxthe overall length is about five feet, and in order to keep the helmet or box in line with the pile and guide the pile, it is usual to provide a gage bolt and formed in the framework of-the pile driving machine and the bolt being secured to the dolly at or near its center and passing through the leaders.

This invention has for its object to provide a construction of helmet 'and' dolly which will be much shorter .in length than the said ordinary helmet and dolly and therefore more readily handled. (applied and removed) than the ordinary helmet and dolly and which will-increase the working room for the monkey to a maximum.

According to the invention, the helmet comprises a plate or cap designed to fit over the head or crown of the pile, such cap being formed with a recess or socket to re- 'ceive the dolly and having depending lugs or arms for holding or securingthe 'cap in position, while, on opposite sides of said feet long or more and of.

leaders these latter being POSltlOIl onor removlng it from'the pile.

Other details will be hereinafter ex;

plained by reference to the accompanyingdrawings whereon-' ca ,ears or loops are provided to receive the 1 'l1 tlng means when placing the cap into Figure 1 illustrates, in elevation, the up- I per part ofa pile showing the improved helmet in position thereon, Fig. 2 illustrates a plan of Fig. 1 with the. dolly removed.

Fig. 3 illustrates a half exterior and half section'al elevation as seen at right angles tof Fig. 1. Fig. 4: illustrates an inverted plan of the helmet with the pile removed. Figs. 5, 6 and 7 are similar views to Figs. 1, 2 and 3 respectively, illustrating a modified construction of helmet. Figs. 8 and 9 illustrate a part side elevation and plan, respectively of a further modification;

Referring now to proved helmet comprises a stout steel ,cap 'or plate a, circular,.hexagon,. square or'jother suitable shape in plan, but for. a square pile, preferably hexagon, and of a diameter slightly larger than that of the pile. 1 Rising from such cap or plate is an annular flange 6 preferably circular in plan and about five inches high. The inner face of this flange is slightly inclined and formsa conical re, cess or socket, see

exterior and the section of the flange is therefore tapered, the narrower part being uppermost.

arms a, a which are arrange at diametrically opposite points and each of which is, by preference, and designed to lie parallel with and alongside one face of the pile. At their lower ends these arms are each provided with a slot 0 which, when the cap is on the ile, comes opposite a hole in the pile and al ows of a bolt (1 being passed through the arms and the pile,

the drawings, the an Fig. 3. The flange b is also, by preference, slightly inclined onits 9o Ext-ending .down. from the late are ,two-

abouteighteen inches long i' for the purpose of securely holding the helmet to the 'pile. f Also depending from lugs or flanges e, 'c which occupy positions intermediate of the said armsand lie against or near to the other and right-angled faces of the pile. While the longer arms a, c and the bolt d serve to hold the helmet down on to the pile, the short lugs help to prevent it twisting or moving sidewise. In one with these short arms or lugs e, e

(or if. desired in one with the long arms) and the 4 the plate a are two short j i end of the pile .is placed a disk or washer of .wood, papier'mach or other suitable 'maflange 6 are'loops or rings 3, e by which the helmet may be handled in placing it on, and'lifting it off,-the' pile, and by which also the-pile may be lifted in slinging or pitching it into position, Or the loops e' 6 may be arranged at the corners and designed sothat they lie within the area'of, the hel- -met,-see Figs. 8 and 9. With this latter arrangement there is less liability of the loops being fractured or broken off. K Into the -conical recess, formed by the flange b on the'to-p of the cap, is fitted the lower conical end of a. short block of hard wood f," preferably about nine inches long,

which constitutes the dolly. At its com- 'cal upper end the dolly f is bound by a metal hoop f in likemanner to the ordinaryl dolly the grain of the wood running lengthwise of the dolly Between the steel plate a and the top terial g, by preference, about two inches thick and approximately the same shape in plan or nearly so as that of the pile. For

' more effectually retaining the washer g in position, the plate or the arms-may be recessed or the arms may be joined or connected to each other by depending flanges a, see s.5and 6. '1

With a elmet made as aforesaid-and its over-all length from the bottom face ofthe.

plate to the top of the dolly not' exceeding, sa a foot, or not exceeding two feet /s1x' inc es includingthe arms, a very comact construction of helmet is obtained. urther, the weight as compared with that y of the ordinary helmet is considerably reduced, which enables the helmet to be handled man'ually instead of by machinery, andalso to be'transported by rail at less cost thanthe ordinary helmet. The g ge o is also rendered unnecessary 'And by the use of a wood washer g in place of sawdust, the trouble of repeatedly renewing the sawdust is done away with. A further advantagefis that by shortening the helmet and dolly it enables the ordinary machine. for driving piles to be used for driving piles of greater variety in length than heretofore.

. The arms 0 will preferably be wider where and the flange above the plate and the arms will be stiffened by webs or ridges b.

' What I claim is 1. A helmet for use in driving reinforced concrete piles, comprising a stout steel plate,

' they join the plate than at the lower ends,

arms and lugs depending from said plate and designed to lie alongsidetwo diametrically opposite sides of the pile, an annular flange rising from the top face of said plate,

and forming a socket, a. short wooden dolly or block 'fitting the said socket, thetdolly and flange being tapered substantially as set forth. w

2. A helmet for use in driving r inforced concrete piles, comprising a. stout teel plate with two depending arms at points diamet-- ric'ally opposite each other, and each arm slotted near its free end, two shorter arms or lugs depending from said plate and loops 'or rings for enabling the helmet to be 1i

Images