US868238A - Tamping-bar. - Google Patents

Description

PATENTED OCT. l5, 1907. E. W. WHEELER.

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ERNEST W. WHEELER, OF BAY CITY, MICHIGAN.

TAMPING-B AR.

Specification of Letters Patent.

Patented Oct. 15, 1907;

Application led December 6, 1906. Serial No. 346,630.

To all whom it may concern:

Be it known that I, ERNEST W. WHEELER, a citizen of the United States, residing at Bay City, in the county of Bay and State of Michigan, have inventedcertain new and useful Improvements in Tamping-Bars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a tamping bar, one object of which is the provision of a device of this description, wherein the end of the bar contacting with the material to be compacted may be guided, in order to prevent its engagement with the walls of the mold or other receptacle in which the material to be tamped is contained.

My invention is capable of use in any place where the usual one-piece'tamping bar may be used, but in addition thereto it may be so operated that the walls of the mold are uninjured when tamping the material contained by the mold.

This construction is capable of use in laying concrete and asphalt side-walks or pavements, as well as for tamping brick or block material, shingles, sewer and land tiles or posts in molds. In fact, it is useful in all concrete work where a tamping bar is used, as well as for molders use. v

Another object of my invention is the provision of a reversible tamping bar provided with a head at each end, the heads preferably being of different dimensions, in order to adapt the tamping bar to any condition of use.

A further object of my invention is the provision of a tamping bar wherein the force of impact will be increased.

Still another object of my invention is the provision of means whereby the jar of impact will not be communicated to the hand and arm of the operator, as well as to avoid the battering up of the head of the telescopic rod and otherwise damaging the head of the bar, and to reduce the noise of impact to a minimum, which objects I attain by interposing a cushion between the actuating portions of the bar.

A still further obj ect is the provision of means whereby the bar can be instantly changed to a one-piece bar in effect, or vice versa.

To these and other ends, therefore, my invention consists in the provision of a two-piece telescopic reversible bar provided with cushioning means and with means for locking the component parts of the bar together, or for releasing them.

In the accompanying drawings, Figure l is a view in side elevation, Fig. 2 is a part sectional View thereof, and Fig. 3 is a detail view of the split sleeve.

It will be understood that the drawing indicates but one of a number of constructions in which my invention may be embodied, and with this in mind, (A) indicates the hollow member and (B) theY coperating mem` ber of my tamping bar, the member (B), in the present instance, comprising a rod which is telescopically received in the member (A) and upon which the member (A) telescopes, the bar being reciprocated into and out of the hollow member (A), or by reversing the bar, the hollow member (A) is reciprocated up and down upon the rod (B).

I preferably provide a foot (l) equipped with a socket (2), in which the lower end of the hollow member (A) is received. Obviously, the socket may be reduced to form a nipple receivable-in the lower end of the hollow member (A), this being an equivalent construction and not necessarily indicated.

That end ofthe rod (B) which is receivable Within the hollow member is headed, as at (3), and within the socket (2) or upon the nipple is located a cushioning element which may consist of a rubber or other disk (4) in line with and against which the headed end of the rod (B) engages, whereby to prevent the jar of impact being communicated to the hand and arm of the operator. as well as avoiding a battering of the head of the telescopic rod and otherwise damaging the head of the bar. The cushioning means also operates to deade-n the sound of the impact,l though it is not suicient to reduce the force of impact of the headed end of the rod (B) against the foot (l) to any appreciable extent.

The outer end ofthe rod (B) is equipped with a tamping head (5) which may be threaded upon the outer end of the bar, a lock-nut (6) being provided to hold the head firmly in place. This head (5) will afford a sufficient amount of weight to impart plenty of impetus to the rod when the latter is actuated.

From the foregoing, it will be seen that the operator may grasp the hollow member (A) withhis left hand and guide the foot (l) along theside of a mold without raising the foot out of the mold. The right hand of the operator will grasp the rod (B), reciprocating the same relative to the hollow member (A), the tamping head (5) increasing the force of impact of the headed end (3) of the rod against the foot (l). The tamping head (5) should be smaller than the foot (l), for instance, and it isperfectly evident that by reversing the tool, the tamping head (5) may be made to Contact with the material to be compacted, the tamping head being guided by the left hand of the operator, while the right hand ofthe operator reciprocates the hollow member (A) on the rod, causing the foot (l) to impinge against the headed end (3) of the rod. In this manner, owing to the provision of the cushioning element (4), the jar of impact is not communicated to the hand and arm of the operator, the head of the telescopic rod is not battered up, or otherwise damaged, the sound of impact is deadened, and the tool is made reversible to meet different conditions of work. Furthermore, in use, the faces of the foot (l) and tamping head (5) are not liable to contact with the edges of the molds, which latter are thereby saved from injury.

In order to prevent the accidental disengagement of the rod (B) and hollow member (A), I preferably provide a perforated cap (7) receivable upon the upper end of the hollow member (A), the rod (B) passing through the aperture in the cap, which aperture is smaller than the headed end (3) of the rod.

As one means for converting the foregoing construction into a solid tamping bar, wherein one member will be stationary relative to the other, I preferably provide a frusto-conical split sleeve (8) (shown in detail in Fig, 3). This split sleeve is received within the upper end of the hollow member (A) in which it is seated, and is adapted to be engaged by thel cap (7) screw threaded on the upper end of the hollow member (A). By screwing the cap (7) tightly upon the hollow member (A), the split sleeve (8) is forced further down into the hollow member and is contracted to frictionally engage the rod (B), and prevent movement thereof relative to the hol- 'low member (A), thus converting the tool into a solid tamping bar. It is obvious that the length of the tool may be suitably adjusted and locked in position by means of the cap and split sleeve. To release the rod (B) from the hollow member (A), all that is necessary is to slack up or partially unscrew the cap (7), whereby the sleeve will be permitted to expand to release the rod relative to the hollow member.

It is evident that many changes might be made in the form and arrangement of the several parts described without departing from the spirit and scope of my invention, and hence, I do not wish to limit myself to the exact construction herein set forth.

Having thus fully disclosed my invention, what I claim as new is- 1. A rever-sible tamping bar comprising a pair of member's movable relative to each other, a foot carried by one of the members and a tamping head carr'ied by the remaining member'.

2. A tamper comprising a hollow member, a foot secured to one end thereof, a rod member received within the hollow member, the rod member adapted to project out of the hollow member', a tamping head on the projecting end of the rod member, the tamper' being reversible to permit either' member to reciprocate relative to the remaining member.

3. A tamping bar comprising a hollow member closed at one end, a rod receivable within the member and a tamping head carried by the rod.

4. A tamping bar comprising a hollow member closed at one end, a rod loosely received in the opposite end of the hollow member and a tamping head carried by the rod.

A camping bar comprisinga hollow member closed at one end, a rod, one end of which is loosely receivable in the opposite end of the hollow member,a tamping head carried by the outer end of the rod, and a cushioning device located between the closed end of the hollow member and the inner end of the rod.

hollow member, the inner end of the rod adapted to irnpinge against the cushioning member.

T. A rever-sible tamping bar comprising a hollow member, a rod receivable therein, the member' and rod beingv movable relative to each other, a tamping foot on the member, a tamping head on the rod and means for preventing the accidental disengagement of the rod and member.

8. A tamping bar comprising a hollow member, a telescopic member receivable in the hollow member, one member adapted to reciprocate relative to the remaining member', a headed end on the telescopic member reciprocating within the hollow member, and a perforated cap carried by the hollow member and engaged by the headed end to pre vent the accidental disengagement of the members relative to each other.

9. A tamping bar comprising a hollow member, a telescopic member receivable in one end of the hollow member, one of the members movable relative to the other member, a compactiug element carried by the stationary member, and means for releasahly locking the two members to gether at any point in their adjustment.

10. A tamping bar comprisingr a hollow member, a telescopic member receivable in one end of the hollow member, one of the members movable relative to the other member, a compacting'element carried by the stationary member, a locking sleeve seated in one end of the hollow member, and a cap adjustable on the hollow member' and adapted to engage the locking sleeve to releasably lock the members together at any point in their adjustment.

11. A tamping bar comprising a hollow member closed at one end, a telescopic member receivable in the opposite end of the hollow member', a compacting element carried by one of the members, a head on the inner' end of the telescopic member', a locking sleeve seated in the open end of the hollow member, and a perforated cap receivable on the open end of the hollow member, the cap adapted to retain the members in engagement with each other and to cooperate with the sleeve to lock the members together'.

l2. A tamper comprising a hollow member, a tamping foot located at one end thereof, a perforated cap located at the opposite end thereof, and having its perforation of less diameter than the bore of the hollow memberso as to overhang the bore, a rod passing through the perforation and received within the hollow member, and an enlarge4 ment on the'inner end of the r'od of greater size than the diameter of the perforation in the cap.

13. A tamper comprising a member, a tamping foot carried thereby, a rod adjustable relative to the member', and means for releasably securing the rod and member to gether at any point in their adjustment.

14. A rever-sible tamper comprising a member, a tamping foot carried thereby, a rod adjustable relative to the member, a tamping head carried by the rod, and means for releasably securing the rod and member together at any point in their adjustment.

In testimony whereof, I affix my signature in presence of two witnesses.

ERNEST W. WHEELER.

Witnesses:

F. C. KnLToN, J. E. WRIGHT.

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