US1415822A

US1415822A - Screw driver

Info

Publication number: US1415822A
Application number: US383506A
Authority: US
Inventors: Thomas J Fegley; Walter S Snyder
Original assignee: NORTH BROS Manufacturing CO
Current assignee: NORTH BROS Manufacturing CO; NORTH BRO'S M'F'G CO
Priority date: 1920-05-22
Filing date: 1920-05-22
Publication date: 1922-05-09
Anticipated expiration: 1939-05-09

Description

vT. J. FEGLEY AND W, S. SNYDER.

SCREW DRIVER. APPLlCAUON FILED MAY 22, 1920.

Patented May 9, 1922.

2 I I! ill/ll UNITED STATES PATENT OFFICE.

THOMAS J. FEGLEY Ann WALTER s. surnnaor PHILADELPHIA. rnnnsynvama.

Assicmoas 'ro NORTH BROS. conrormrron or PENNSYLVANIA.

MFG. (10., OF PHILADELZPHIA, PENNSYLVANIA, A.

SCREW DRIVER.

Pennsylvania, have inventedcertain 111lprovements in Screw Drivers, of which the following is a specification;

Our-invention relates to certain improvements. in screw drivers of the push type in which the screw driver is turned by pushing upon the handle and when the handle has been pushed to its full extent it engages the blade so that the blade can be turned on turning the handle.

One object of our invention is to improve this type of screw driver by providing means for retracting the handle after it has been ushed forward.

A further object of the provide means for connecting the handle with the blade, when the handle has been pushed in to its full extent.

These objects we attain in the following manner, reference being had to the acco1npanying drawings, in which,

i Fig. l is a side view of our improved screw driver showing, in dotted lines, the handle directly connected to the spindle of the screw driver;

Fig. 2 is a longitudinal sectional view; showing the spring extended;

Fig. 3 is a detached sectional perspective view of the cylinder;

Fig. 4 is a perspective view collar;

Fig. 5 is a perspective view of the spin dle- Fig. 6 is a perspective view of the nut;

Fig. 7 is a perspective view of the coupling piece; and

Fig. 8 is a perspective view of the abutment ring.

1 is the cylinder having 2 internal spiral grooves in the present instance. 3 is the of the bearing handle into which the upper end of the cylinder extends and. to which it is attached in any suitable manner so that the cylinder will turn with the handle 3. 4: is a ferrule, which extends. beyond the handle and rests against the cylinder in the present instance. The cylinder is preferably roughened, as shown in Fig. 1. 5 is a nut having threads, as illustrated in Fig. 6, which travel in the spiral grooves in the interior of the cyl- Application filed May a, 1920.

This coupling piece invention is to Patented May 9, 1922.

Serial No. 383,506.

inder. 6 is the spindle shaped at the lower endto engage the head of a screw. This spindle extends through the nut 5 and is reduced at its upper end 7 to form a rectangular extension which is adapted to a slot 8 in a coupling piece 9 carried by the handle. has a head 10 which rests in a recess in the upper end of the cylinder, as shown in Fig. 2, and the head has a pin 11 adapted to slots 12 in the ex.- treme end of the cylinder. The cylinder has an internal thread 13 and adapted to this thread is an abutment ring 14:. Be tween this ring and the head it) of the c0upling piece 9 is a spring 15 so as to allow the coupling piece to yield when the end 7 of the spindle 6 comes in contact with it and in the event of the spindle striking the end of the piece 9 it will be free to turn until it enters the slot 8, locking the spindle to the handle, as the spring 15 will drive the couplin piece forward and into engagement with the spindle.

The nut 5 is slotted at 16 at its lower end and on the spindle is a pin 17, which projects into the slot so that the spindle must turn with the nut. The nut has a certain amount of play on the spindle so that it can be engaged or disengaged therefrom. A pin 18 on the spindle above the nut limits the movement and also forms a support for an abutment washer 19 and between this washer and the head 10 of the coupling piece 9 is a spiral spring 20 which returns the handle to its normal position as soon as it is released, so that the handle is always in position to be pushed to turn the spindle. The spindle passes through a hearing collar 21 screwed into the lower end of the cylinder, as shown in Fig. 2.

The screw driver is used in the following manner; where a screw is to be driven, the end of the spindle engages the screw and on pushing the handle forward. the first movement' causes the nut to engage the spindle and on the continued movement, the nut will turn in the cylinder and turn the spindle, driving the screw to the depth required. When the spindle comes in contact with the coupling piece 8, the coupling piece will yield until the end of the spindle enters the groove in the coupling piece, when the two will be locked so that on turning the handle the tool can be used as an ordinary screw pl ing piece having driver, since the coupling piece must turn with the handle. The moment the handle-is a e the n 0 etracts the ha d e, r urnin -i t0v it i I -P@ itim. e t it will be in position to drive another screw.

We claim 1. The combination in a push screw driver, of a spindle; a nut arranged to turn th "h n l cy ind r having a spiral groov'ethereinwith which the threads of the nut engage; a spiral spring arrangedtoretract the handle after it has been pushed forward to turn the "spindle; and' a yieldi'ng coupling piece slotte'dto eiigage the spindle and connected 'to the handle so as return therewith. 2. The combination in a screw driver, of a spindle; a m1t'1eose,ther 0n a'ndslotted at 'th'eflower end; a pin ori"the"spindle with which the nut engtjgesfa cylinder' haviiig two spiral grooves therein, 1 the threads "on the nut entering the grooves; a handle located on the upper end of the cylinder," a headed coupling piecemounted in" the cylinder, the cylinderb'eing slotted and the coua pin 'enteringthe slot;

inner end of ,t

' n'otch'ed at one a spring back of the coupling piece, the coupling piece being recessed to receive the v he spindle; and a coiled spring eaedbeeen m some he" new p ce- 3QThe combination in a screw driver, of a spindle; a cylinder having two spiral grooves therein; a nut mounted on the spindle and having threads adapted to the rooves in the cylinder, the nut 'being end; the spindle having a pin adapted to the notch so that the spindle will turn with the nut; pin on the spindle on" the opposite side of the movement of the nut; an abutment washer supported by thepin; a hea'dedcoupling piecehaving a notch at its lower end to receive the upper end of the'spindle so that the spindle will turn with the coupling piece; springback of the coupling piece; a hand leenclosing the upper end of the cylinder; and aispr ng between the abutment washer on the spindle and the-head of the coupling piece.

THOMAS J. FEGLEY. WALTER S. SNYDER.

nut to limit the