Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1349283 A
Publication typeGrant
Publication dateAug 10, 1920
Filing dateJul 12, 1918
Priority dateJul 12, 1918
Publication numberUS 1349283 A, US 1349283A, US-A-1349283, US1349283 A, US1349283A
InventorsKollock Samuel W M
Original AssigneeGeorge L Kollock, Martin Robert P, Wilfred Baran
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mechanical movement
US 1349283 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)



1,349,283 D Patented Aug. 10, 1920.


12 I o A fllllIIIIIIIIlllllllllllllllllliilll hummm-nig 'a Illllllllllll S. WI M. KOLLOCK.


1,349,283 y Patented Aug. 10, 19200 2 SHEETS-SHEET 2.

Il I! i12 65 S 6.5 3mm/woz @Hom/1 m UNITED STATES PATENT OFFICE.




Specification of .Application filed July 12,

To all whom t may concern:

Be it known that I, SAMUEL W. M. Kor.- LooK, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented new and useful Improvements in Mechanical Movements, of which the following is a specification.

The object of the invention is to provlde an electrically operated hammer adapted for actuating different kinds of tools such as a chisel, riveting punch and the like and having its elements so mounted and related as to insure efficiency and durability with facillty of control by the operator.

Further objects and advantages will appear in the following description, it being understood that changes in form, proportion and details of the illustrated and preferred embodiment thereof may be resorted to, within the scope of the appended claims, without ,departing from the spirit of the invention.

In the drawings Figure 1 is a longitudinal sectional viewr of the apparatus;

Fig. 2 is a similar view showing the parts in a plane at right angles to that of Fig. 1.

Fig. 3 is a transverse section on the plane indicated by the line 3-3 of Fig. 1. v

Figs. 4 and 5 are detailed side and edge Views of a slightly modified form ofhammer or plunger yoke and related tappet elements.

Figs. 6 anld 7 are detailed side and edge views respectively of another slightly modified .form of plunger or hammer and yoke with the tappet elements.

Within a lsuitable casing 10, which may be tubular as shown and to one end of which is attached a handle or grip 11, is arranged a motor having a field or stator 12 and the armature or rotor 13, the spindle 14 of the latter being mounted in transverse heads 15 and 16. The terminals 17 and 18 may be attached to any suitable source of energy and arranged in the circuit formed by the conduits 19 is a plug switch 20 arranged within convenient reach of a hand grasping :the grip.

Letters Patent.

1918. Serial No. 244,658'.

in the casing also carries a pinion 25 meshing with peripheral gear teeth on the tappet wlheel or disk 26 which is arranged in oper` ative relation with a yoke 27 on a hammer or plunger 28. The plunger is mounted for reciprocatory motion in a bearing ring 29 and has aterminal washer 30, while between said bearing ring and washer is located a plunger actuating spring 31.

.In the construction illustrated in Figs. 1 and 2 the tappet wheel or disk is of double construction having the spaced parallel ele ments 26a and 261 in which the arms of the yoke 27 operate, said tappet member carrylng tappets 32- for successive engagement with the contact 33 on the yoke of the hammer or plunger. Also as illustrated in Figs. 1 and 2 the said contact may be provided with a cushion spring 34 to relieve the jar incident to the successive engagement of the tappet with th'e contact and which serveto successively retract the hammer against the tension of the spring 3l and then intermediately release the same to permit the spring to force the hammer or plunger into contact with any suitable tool bit which may be carried in the tool socket 35.

From the foregoing description it will be Patented Aug. 10, 1920.

obvious that the arrangement of the parts is mer yoke illustrated in Figs. 4 and 5 the arms of the yoke are split as shown more clearly in Fig. 5, a single disk constituting the tappet member as shown at 36, and in this form anti-friction sleeves 37 are arranged upon the contacts 38 whereas in the l form illustrated in Figs. 1 and 2, the preferred antifriction relation' between the parts is secured by providing the tappets 32 with anti-friction sleeves or rollers 32a. l

Also in the modification illustrated in Figs. 6 and 7 the yoke has its arms split or divided to arrange the elements thereof on opposite sides of an intermediate single tappet disk 39 of which the tappets 40 are provided with anti-friction sleeves 4l for engagement withthe Contact 42 of the hammer yoke 43.

Moreover, as a further means for guiding the hammer or plunger, particularly as illustrated in the form shown in Figs. l and 2, longitudinal webs 44 may be disposedupon the inner surface of the casing to engage the side surfaces of the yoke arm, but it is obvious that any equivalent of this arrangement of the parts may be adopted as found most convenient.

From the above description it will be noted that the frictional contact and j ar incident to the relative movementof the tappet member and yoke of the hammer or plunger are minimized, so that the full effect of the power of the motor maybe utilized in the operation of the hammer, the successive blows of which are determined in force by the tension of the impelling spring which is compressed successively by the coperative action of said tappet and the yoke.

wWhat is claimed is A device of the class described including a reciprocatory spring impelled plunger, a yoke carried by one end thereof and provided with a Contact, a rotary tappet carrying member, tappets arranged on said member for successive engagement with the contact of the yoke, a cushion spring associated with the contact of the yoke to relieve the jar incident to the successive engagement of the tappets with said contact, fixed guides, and the arms of said yoke being channeled to receive said guides.,v

In testimony whereof l aiiirv my signature.

SAMUEL lw. M. KoLLocK.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2710543 *Jun 25, 1948Jun 14, 1955Anker Krogh ArthurControl mechanism for gears and the like
US2808736 *Feb 7, 1952Oct 8, 1957Jackson Hydraulic Machine Co ICounterbalancing means for punch press
US5099705 *Dec 5, 1989Mar 31, 1992Konstantins DravnieksHand-held reciprocating working tool
US8070455 *Jul 7, 2009Dec 6, 2011Syngardia Systems, Inc,.Scotch-yoke mechanism for redundant actuation applications
US20100292787 *Jul 7, 2009Nov 18, 2010Syncardia Systems, Inc.Scotch-yoke mechanism for redundant actuation applications
U.S. Classification74/50
International ClassificationB25D11/00, B25D11/10
Cooperative ClassificationB25D11/10
European ClassificationB25D11/10