US1150357A - Pneumatic drill. - Google Patents

Description

G.- H. GILMAN. PNEUMATIC DRILL. APPLICATION HLEQ MAY 28, 1914.

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Patnted Aug. 17, 1915,

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GEORGE H. GILMAN, OF- CLAREMONT,

NEW HAMPSHIRE, ASSIGNOR T0 SULLIVAN MACHINERY COMPANY, OF CLAREMONT, NEW HAMPSHIRE, A CORPORATION OF MASSACHUSETTS.

PNEUMATIC DRILL.

Specification of Letters Patent.

Patented Aug. 1'3, 1915.

Application filed May 28, 1914. Serial No. 841,615.

positively fed by the screw of the support or may be operated independently thereof .as desired.

I The character of the invention will be best understood by reference to the following description when taken in connection with the accompanying drawings of one illustrative embodiment thereof, While its scope will bemore particularly pointed out in the appended claims.

i In the drawings: Figure 1 is a plan view.

of a hand drill and a support therefor illustrating one embodiment of the invention; Fig. 2 is a view in side elevation and partially in vertical section of the tool and support shown in Fig. 1; Fig. 3 is a plan view on a scale larger than shown in Figs. 1 and 20f a cradle forming part of the support for the tool. nal section through the cradle shown in Fig. 3; and Fig. 5 on an enlarged scale is a transverse rection taken on line 55 of Fig. 2 with the tool removed.

Referring to the drawings and tothe embodiment of my invention which I have selected for illustrative purposes, I have hammer which delivers the inne vend of a drill bit 5. The latter is mounted in an elongated cylinder head 7 preferably supported in a yielding manner on vthe forward end of the cylinder 3 by means ofa pair of tie rods 9, 9 and cushioning springs 11 11. To arrest'forward movement of the drill bit when [struck by the piston hammer there is provided a tool retainer or stop 13 of any suitable construcor saddle 25 shown herein Fig. 4: is a vertical longitudithere is provided a swing tion. The tool is provided with a handle 15 formed to present an elongated eye 17 be-, tween said handle and the rear cylinder head 19.

At times the tool described is adapted to be held manually in operation and at other times it may be desired to provide a support for the tool and feed the same positively relatively to the work by a feed screw. The

support shown herein comprises a shell 21' having a trunnion 23 depending therefrom and detachably connected to a usual clamp as connected to a column 33, although obviously the trunnion may be connected to a tripod if desired.

Journaled in the shell 21 is a feed screw 35 adapted to be turned by a handle 37. Theshell is provided with ways 39, 39 receiving slide flanges 41, 41 of the cradle. Depending from the cradle is an eye l3 receiving a nut 4-5 threaded to the feed screw 35. WVhen the feed screw is turned by its .handle the'nut and cradle are caused to travel longitudinally thereof.

An important feature of the invention relates to the construction of the cradle whereby the tool may be, readily detachahly connected thereto. To accomplish this the cradle is provided with a head 4.7 projecting upwardly therefrom and formed to present a fixed jaw. 49 to which a movable jaw 51 is hinged by a pin hf'lextenl'ling through registering apertures in cars on said jaws. To lock the upper jaw in closed position bolt pivoted to the'head 47 and received in an open slot in the upper jaw, said bolt being held therein by a thumb nut 57. The head 47 is provided with inclined portions 59 against which the rear head 19 of the tool is adapted to rest, as more fully hereinafter described. The cradle also is provided with a seat 60 curved to conform to the contour of the tool and having an incline 61 for engagement with a correspondingly inclined portion of the tOol.

The tool is placed on the cradlewith its handle resting in the lower jaw 49 and the upper jaw 51 entered through the handle draws the handle tightlyagainst rests on the inclines 59 and 61 it tends to ride forwardly on its saddle and in so doing the throat of the clamp jaws. The aws are formed to conform to the contour of the handle aperture and thereby tightly grip a substantial extent of the handle and in so doing prevent any rotation of the body of the tool in the cradle and securely retain the same in the head of the cylinder to further contribute to the holding of the tool in its proper position. After the tool has been secured to its cradle it may be positively fed relatively to the work by turning the feed screw 35.

If it is desired to remove the tool and support and operate thesame manually, it is simply necessary to release the single swing bolt and open the jaws. tree to be lifted from the cradle.

While the tool is shown herein within its handle in horizontal position, it will be understood that the cradle may support the tool with its handle in vertical position if desired.

Having described one illustrative embodiment of the invention without limiting the same thereto, what I claim as new and desire to secure by Letters Patent is:

1. In combination, a percussive tool having a body and a handle provided with an opening, a supporting cradle for the tool,

said cradle being provided with a handlesupporting head comprising fixed and movable jaws, one of which enters the opening in the handle, and means to hold said jaws in handle-engaging relation.

2. In combination, a percussive tool having a body and a handle provided with an opening, a supporting cradle for the tool, said cradle being provided with. a handlereceiving head comprising two jaws relatively movable with respect to each other,

one of said jaws being adapted to enter said opening, and means to hold said jaws 1n handle-engaging relation.

3. In combination, a percussive tool having a body and a handle provided with an opening, a supporting cradle for the tool, said cradle having a member to support said handle in a position transversely of the cradle, and a coperating member adapted to pass through the opening of said handle and to coiipcratc with said handle support- The tool is then a percussive tool havsaid cradle haying two members pivoted together and adapted to receive said handle between them, one of said members passing through the opening.

5. In combination, ing a body and a handle provided with an opening, a supporting cradle for the tool, said cradle having a member-to support said handle in a position transversely of the cradle, a cooperating member adapted and a handle provided with an.

a percussive tool hav to passvthrough the opening of said handle and to cooperate with said handle supporting means in maintaining said handle in position, and cooperating means to support the body of the tool.

6. In combination, a percussive tool having a body and a handle provided with an opening, a supporting cradle for said tool, said cradle having two members pivoted together and adapted to receive a handle between them, one of said members passing through the opening, and cotiperating means to support the body of the tool.

7. In combination, ing a body and a handle, a supporting cradle having handle and body supports for the tool, one at least of said supports having a fprwardly extending incline to receive the too 8. In combination, a percussive tool having a body and a handle, a supporting cradle having handle and. body supports for the tool, each of said supports having a forwardly extending incline to receive the tool, and one of said supports having means to clamp the tool thereto.

9. In combination, a percussive tool having a body and a handle 15 provided with an opening 17, a supporting cradle-for said tool having a tool supporting head 47 provided with a handle receiving seat and a cooperating jaw 51.

10. In combination, a percussive tool hava percussive tool haviio

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