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Publication numberUS952571 A
Publication typeGrant
Publication dateMar 22, 1910
Filing dateJun 10, 1909
Priority dateJun 10, 1909
Publication numberUS 952571 A, US 952571A, US-A-952571, US952571 A, US952571A
InventorsAmherst G Lamb
Original AssigneeAmherst G Lamb
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Brad holder and set.
US 952571 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Ma1".22, 1910.




Specification of Letters Patent.

Patented Mar. 22, 1910.

Application filed June 10, 1909. Serial No. 501,341.

To all whom it may concern:

Be it known that I, AMI-Inner G. LAMB, a citizen of the United States, residing in rTorrington, in the county of Litchfield and State ot Connecticut, have invented certain new and useful Improvements in Brad Holders and Sets, of which the following is a specification.

This invention relates to brad holders and sets and affords a device whereby a brad may be held for receiving the blow for driving and setting the saine.

lt is extremely difficult in doing' work requiring the use of brads to start them and drive them properly into the work, particularly is this the case where the brads are to be driven in situations and where it is difli cult to gain access with a hammer or in fact with the hands for holding' the brad. In any position, however, it is diflicult to hold and strike it with the hammer.

This invention, as its title would indicate, is for a tool not only for the purpose of' holding the brad for receiving the driving blow but also one constituting a set which will force the brad into the work and then properly set it. As the same instrmnent drives and sets the brad, the liability of' mari-ing the surface around the head of the brad is done away with, it being well known that it is at times dimcult to get a nail set right on top of a very small nail or brad. The device also saves considerable time which would otherwise be consumed in using a bradawl, then a hammer, and then a nail set.

In thc drawings accompanying and forming a part of this specification Figure 1 is an elevation ot a practicable embodiment of a forni ot' my invention, the brad set portion is shown as retracted in the handle or holder in its brad receiving position. Fig. 2 is a view showing the parts in the several relative positions they occupy in Fig. 1 but with the tool given a quarter turn and the holder shown in longitudinal section, the active part or setting portion of the brad-set is also shown in longitudinal section. Fig. 3 is a view similar to Fig. 2 but showing the set advanced within the holder. Fig. l is an elevational view of the brad-set removed from the holder. Fig. 5 is a longitudinal section of the holder taken at about a quarter turn from the plane in which the section of Figs. 2 and 3 is taken. Fig. 6 is an enlarged perspective view of the brad holding ngers and Fig. 7 is an enlarged perspective view of the detent member for maintaining the parts in their assembled relation.

rllhe device illustrated herein is drawn to scale, that is, it is the full size of an instrument which is commercially made.

The tool comprises practically a brad-set designated in a general wayby 10 and a holder or handle portion designated in a. general way by 11. The brad-set is shown as embodying a shank portion 12 which has a working fit within the longitudinal chamber or bore 13 otl the holder, and it has a setting plunger 14 which has a working fit within the longitudinal chamber or bore 15 of' the holder. This plunger 14: and the bore or chamber 15 for receiving it are respectively of less radius than are the shank portion 12 and the chamber 13. The active end 1G of the setting plunger may in practice be concaved for the purpose of aliording a firm hold upon the head of the brad. The brad-set portion also embodies a head 17, a portion of which 1S is knurled as is also the outside 19 of the holder. The back end 2O of the head is designed to receive the driving and setting impact which may be imparted by the hand or by some suitable striking implement. lThe front end of the head is provided with a stop shoulder 21, and the rear end of the holder is formed with an abutment face 22 for engaging and stopping said shoulder. The face 22 is located at such a. suitable distance from the front end 23 of the holder that when such face 22 and the shoulder 21 are in engagement, the front end 16 of the plunger will slightly protrude beyond the front end 23 of the holder. The front end of the holder is provided upon each side with a slot 2st. Adjacent to said slots there is provided a circuniferential groove 25 in which a spring collar 26 is carried and said collar is provided with a pair of spring lingers 27 which fingers extend from the outer side through the openings of' the slots 24 and into the chamber or bore 15, a longitudinal recess being formed between such fingers in the path of movement of the setting plunger when the plunger is drawn back into the position illustrated in Figs. 1 and 2, a brad may be placed between the fingers 27 in the recess which they form and such brad will then be in the path of movement of' the plunger when this is advanced. The brad will be placed in suoli recess between the fingers 27 when the implement is held in any convenient position, and to assist the positioning ot the brad the plunger may be magnetized. Ajtter the brad is placed in position, the trout end 2?) of the holder will be placed upon the work at the position Where it is desired to seat the brad and the 'face Q() Will be given a su'liicient blow to drive the brad into the work and set the same either more or less as occasion may demand. Stopping oit' the 'forward movement ot the plunger by means of the shoulder 21 engaging the tace 22 will not interfere with the setting' of the brad because ot the tact that When such shoulder and face are in engagement the trontend ot` the plunger extends beyond the iront end of the holder.

ln practice it is desirable to so construct the parts that the holder and brad-set will not become disassembled and to also provide means for limiting the backward or retractive movement ot the bradset relative to the holder and for this reason a circumferential groove QS is provided in the holder and adjacent to such circumterential groove a slot or opening` 29 passes through the holder to the chamber 13. A spring collar 30 is mounted in the groove 28 and a detent 3l is carried by suoli collar and passes through the opening 29 and in position to engage the longitudinally disposed flattened face 32 upon the` shank portion l2 ot the brad-set. The tlattened tace 32 ends at its front portion in a stop tace 33 which will be engaged by the detent 3l when the parts have been moved one relatively to the other a si'il'licient distance to retract the plunger tor receiving a brad. The detent being yieldable will permit the disassemblage ot the parts when occasion may demand.

Having thus described my invention, I claim:

l. The combination with a b ad-set em bodying a cylindrical shank having a flattened side `liace tor a portion of its length ending .in a stop tace at the front, a cylindrical brad setting plunger ot lesser radius than the shank and carried at the front end thereof and having a head at the rear end thereof, said head being provided with a shoulder at its front tace, ol'l a handle having a longitudinal bore constituting a guide for the shank and having a shoulder for engaging the shoulder on the head and having an opening into said bore, and at the front end a longitudinal bore of lesser radius than the first mentioned bore t'or receiving the brad setting plunger, said handle having openings at each sidel extending from the outer side into said bore of lesser radius, a spring mounted externally of the holder and entering said opening in the same for engaging the flattened side and the stop tace on the shank, and a spring mounted externally of said holder and having lingers entering through the said openings into the said bore of lesser radius, and forming a longitudinal recess tor receiving a brad and located in position for permitting the passage therethrough ot the b 'ad setting plunger.

2. The combination With a brad set enr bodying a shank, said shank having a head at the bottom end, a brad engaging tace at the front end and a longitudinal guide 'face and a stop tace at the front end of such guide face, of a holder having a chamber for receiving and guiding the brad set and hav' ing an opening entering said chamber and located t'or registration with the said guide tace, there being a groove about the holder adjacent such opening, a spring collar seated in the said groove and a spring detent carried by the collar and entering said opening for engaging the guide tace and stop face on the shank, said handle being provided at its front portion with a pair ot slots and a groove adjacent to such slots, a spring collar mounted in such groove and a pair ot' lingers carried by such collar and entering the chamber ot the handle through such slots.

3. The combination with a brad set having a brad engaging face at its front end and provided with a longitudinal guide tace and a stop tace at the front end of said guide face, of a holder surrounding the shank ot the brad set and having an opening located to register With the said guide Jface and a groove adjacent said opening and a pair of slots at the front end located to register With the path of movement ot the brad engaging tace and a groove adjacent said slots, a detent member entering said opening and a collar carrying said detent and seated in said adjacent groove, a pair of spring brad holding fingers entering said slots and a collar carrying' said lingers and seated in the said adjacent groove.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2896209 *Apr 4, 1957Jul 28, 1959Martin HiltiStud driving device
US3060440 *Aug 19, 1955Oct 30, 1962Olin MathiesonFastener driving tools
US5529234 *May 5, 1995Jun 25, 1996Juneau; Michael A.Nail driver and guide tool
US6036073 *Aug 20, 1998Mar 14, 2000Newhouse; Richard D.Nail holding and driving tool
US7407073Jan 27, 2005Aug 5, 2008M.G.H Agricultural Cooperative Society Ltd.Nail guide
Cooperative ClassificationB25C1/02