US813641A - Automatic prick-punch. - Google Patents

Automatic prick-punch. Download PDF

Info

Publication number
US813641A
US813641A US26257305A US1905262573A US813641A US 813641 A US813641 A US 813641A US 26257305 A US26257305 A US 26257305A US 1905262573 A US1905262573 A US 1905262573A US 813641 A US813641 A US 813641A
Authority
US
United States
Prior art keywords
hammer
punch
trigger
end
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US26257305A
Inventor
George T Gilbert
Original Assignee
Willis D Hamilton
George T Gilbert
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Willis D Hamilton, George T Gilbert filed Critical Willis D Hamilton
Priority to US26257305A priority Critical patent/US813641A/en
Application granted granted Critical
Publication of US813641A publication Critical patent/US813641A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D5/00Centre punches

Description

110.813,641. PATENTBD FEB. 27, 1906. G. T. GILBERT.

AUTOMATIC PRICK PUNCH. APPLICATION FILED MM2?, 1905.

UNITED STATES PATENT OFFICE.

GEORGE T. GILBERT, OF NORTHAMPTON, MASSACHUSETTS, ASSIGNOR OF ONE-THIRD TO WILLIS D. HAMILTON, OF SPRINGFIELD, MASSACHU- SETTS.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed May 27,1905. Serial No. 262,573.

To wl whom it may concern:

Be it known that I, GEORGE T. GILBERT, a citizen of the United States of America, residing at Northampton, in the county of Hampshire and State of Massachusetts, have invented new and useful Improvements in Automatic Frick-Punches, of which the following is a specification.

This invention relates to automatic prickpunches g and the object thereof is to provide a tool of this class in which the construction is much simplified and the cost of manufacture reduced.

The invention will be fully described in the following specification and the novel points of the construction clearly pointed out in the claims appended thereto, and the invention is fully illustrated in the accompanying drawings, in which- Figure 1 is a sectional elevation of a prickpunch, showing the position of the parts in a State of rest. Fig. 2 is a similar view showing the position of the parts with the hammer-actuating spring compressed and just prior to the release thereof. Fig. 3 is a view similar to Figs. l and 2, showing the position of the parts after the release of the hammer and when the latter has been shot forward against the end of the punch. Fig. 4 is a transverse section on line 4 4, Fig. 1, looking in the direction of the arrow. Fig. 5 is a like sectional view to Fig. 4, the plane of the section being on line 5 5, Fig. 3. Fig. '6 is a perspective view of the hammer and trigger and a part of the hammer-spring, the forward end of the hammer being out off in the plane of the section of line 4 4 on Fig. 1. Fig. 7 is a perspective view showing a modification of the hammer construction. Fig. 8 is a View of the end of the punch, showing the location of the shoulder thereon, with which the trigger engages in different locations relative to the end of the punch.

Referring to the drawings, a indicates a shell, circular in cross-section, closed at one end and constituting the handle of the tool. Located within the shell is a cylindricallyshaped hammer b, which has an easy sliding fit in the shell for almost its entire length, the open end of the shell being counterbored to a larger diameter, as indicated by c, for a certain distance, and while the forward end of the hammer extends into this counterbored portion when it is in the position shown in entirely out of .solid metal plug h, which is bored out axially to receive the punch g, this plug being suitably tapered at the forward end thereof toward the punch.

The hole bored through the plug is indicated byj and is reduced in diameter near the forward end thereof, as at le, the resulting shoulder o constituting an abutment for the' collar m on the punch, this collar preferably being made integral with the latter.

The rear end of the plug h is threaded, as at p, and screwed into the open end of the handle, a loose disk g being inserted in the open end of the latter and bearing against the shoulder r, formed by cutting the screwthreads in the end of the shell, and it is held in that position by the plug. This disk g is bored out to receive the rear end of the punch and serves as a support therefor and as an abutment for the spiral spring s, located bctween said disk or washer and the collar m, the punch having a sliding fit in the washer. The function of this spring is merely to return the punch to the extended position shown in Fig. 1 after it has been forced backward to the position shown in Fig. 2 ready to receive the blow of the hammer.

The rear or inner end of the punch is turned down for a certain distance to provide a shoulder t thereon, whereby by means of the trigger (indicated as a whole by c) the punch is prevented from sliding into the hole w, bored in the hammer axially thereof from the forward end partly through it. This trigger is so arranged that if the point of the punch be held against the work and pressure be applied to the end of the handle the hammer t will be pressed back into the handle, compressing the spring f until the trigger comes in contact with the shoulder d, whereupon the trigger will be forced out from under the shoulder t of the punch, and the hammer will be then shot forward by its spring against the inner end of the punch, the latter enter- IOO ing the hole w, the position of the parts at the moment of impact of the hammer on the punch being that shown in Fig. 3.

To provide for the reception of the trigger and its spring-arm, (these two parts preferably being made in one piece, as shown,) the forward end of the hammer has a circumferential groove :t turned therein near its forward end, a portion of the body on the hammer at the bottom of said groove being cut away, as indicated at y, Fig. 6, said cutaway portion intercepting the hole w in the hammer, whereby the trigger u may through the opening into said hole be located in position to engage the shoulder t on the inner end of the punch. Furthermore, this annular groove in the forward end of the hammer provides space in which to locate the circular trigger, whereby it may slide with the hammer within the handle and yet be free to play transversely of the line of the movement of the hammer to release the latter at the proper time.

The trigger, as shown very clearly in the drawings, consists of an annular head having an opening at one side, which head lies in the groove and is provided with a spring-arm 3, extending in a groove 4 lengthwise of the hammer back toward and past the shoulder,

formed by turning down the end e of the hammer, the extremity of the spring being located under a coil or coils of the hammerspring The groove 4 is so formed as to provide a high point 5 therein'toward its rear end, over which the spring-arm 3 of the trigger will be flexed more or less when the parts are assembled. This has a tendency to always hold the circular trigger in engagement with the shoulder t on the inner end of the punch.

It will be noted that the trigger extends partly around the punch, and in one side of the trigger is cut a semicircular groove 6, as shown in Figs. 4, 5, and 6 particularly, which .fits substantially the contour of the punch,

whereby the engagement between the punch and the trigger will be an effective one, and this groove 6 is opposite that part of the circular trigger to which the spring-arm 3 is located, and at the angle formed by the union of said arm with the trigger a rounded boss 7 is formed which extends outwardly and always bears against the wall of the handle part a, and it is this boss 7 which comes in contact with the shoulder d at the end of the rearward movement of the hammer and forces the opposite portion of the trigger out of engagement with the shoulder t on the end of the punch.

In order that the parts may operate without undue friction, due to any binding effect between them, the inner end of the punch is made to have a rather close sliding fit in the hole w in the hammer, and when these parts are oiled up any air which may be drawn into the hole w by the suction effect of the punch acts as a cushion to prevent the hammer from striking with full force thereon. Therefore to prevent the compression of 'any air in said hole in the hammer the vent-hole 8 is provided, which extends from the bottom of the hole w out through the wall of the hammer toward the rear end thereof, as shown.

In making the rickunches for various uses the weight o the Iblow struck by the hammer may be regulated by locating the shoulder t on the punch at different distances from the inner end of the punch, whereby the distance which the hammer must move before striking the punch may be increased or diminished. Fig. 8 illustrates this.

It is to be observed that the punch never' extends outwardly so far as to entirely leave the hole w in the hammer, and therefore the forward end of the latter bearing on the punch is always maintained in axial alinement with that art of the shell in which the rear end thereofpis supported. To dismount this tool, the plug h is first unscrewed and it and the punch removed, together with the loose disk g. The hammer and its spring f may then be drawn out of the shell and the spring f separated from the hammer, when t e trigger and its spring-arm may-be easily disengaged from the hammer.

Fig. 8 shows a modification of the hammer construction whereby the expense of milling the groove 4 therein to provide the high point 5 may be obviated and whereby the hammer may thus be made on a screw-machine. This consists in merely turning 0H the body of the hammer toward each end to leave the high point 5 thereon, over which the spring-arm 3 may be sprung, as described, the ends of the hammer being left full size to fit the bore of the handle. tion the end of the spring-arm would pass through a hole e in the circular flange e2 on the rear end of the body, resulting from thus turning down the latter, as stated.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. In an automatic prickunch,.a hammer, a hollow handle in whic the hammer is slidable, a trigger located in an annular groove in the hammer, and a spring to move said trigger transversely of the axis of the hammer, a punch extending into a cavity in the hammer having a shoulder thereon with which said trigger may engage to hold the punch and hammer in separated relation, there being a shoulder on the inner wall of the handle which operates to move the trigger out of engagement with the punch at the proper time, and a suitable spring for the In this construc- IOO punch to move the latter away from the ing in the surface thereof an annular groove, and a longitudinally-disposed groove intercepting said annular groove, there being an opening extending from the bottom ofthe annular groove into a cavity in the hammer a punch extending into the said cavity in the hammer; a trigger consisting of a circular head to fit said annular groove, and an arm eX- tending from said head at right angles there- Io to located in said longitudinal groove and GEORGE T. GILBERT.

Witnesses WM. H. CHAPIN, K. I. CLEMoNs.

US26257305A 1905-05-27 1905-05-27 Automatic prick-punch. Expired - Lifetime US813641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US26257305A US813641A (en) 1905-05-27 1905-05-27 Automatic prick-punch.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26257305A US813641A (en) 1905-05-27 1905-05-27 Automatic prick-punch.

Publications (1)

Publication Number Publication Date
US813641A true US813641A (en) 1906-02-27

Family

ID=2882121

Family Applications (1)

Application Number Title Priority Date Filing Date
US26257305A Expired - Lifetime US813641A (en) 1905-05-27 1905-05-27 Automatic prick-punch.

Country Status (1)

Country Link
US (1) US813641A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030205013A1 (en) * 2002-05-03 2003-11-06 Faus Group, Inc. Flooring system having complementary sub-panels
US20040009320A1 (en) * 2002-05-03 2004-01-15 Garcia Eugenio Cruz Flooring system having complementary sub-panels
US6684514B2 (en) 2001-04-11 2004-02-03 Robert Welch Center scribing kit for use with drilling templates
US20040074191A1 (en) * 2002-05-03 2004-04-22 Garcia Eugenio Cruz Flooring system having microbevels
US20040200165A1 (en) * 2002-05-03 2004-10-14 Faus Group, Inc Flooring system having sub-panels
US20060005498A1 (en) * 2004-07-07 2006-01-12 Vincente Sabater Flooring system having sub-panels with complementary edge patterns
US8875460B2 (en) 1999-11-05 2014-11-04 Faus Group, Inc. Direct laminated floor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8875460B2 (en) 1999-11-05 2014-11-04 Faus Group, Inc. Direct laminated floor
US6684514B2 (en) 2001-04-11 2004-02-03 Robert Welch Center scribing kit for use with drilling templates
US20030205013A1 (en) * 2002-05-03 2003-11-06 Faus Group, Inc. Flooring system having complementary sub-panels
US20040009320A1 (en) * 2002-05-03 2004-01-15 Garcia Eugenio Cruz Flooring system having complementary sub-panels
US20040074191A1 (en) * 2002-05-03 2004-04-22 Garcia Eugenio Cruz Flooring system having microbevels
US7836648B2 (en) 2002-05-03 2010-11-23 Faus Group Flooring system having complementary sub-panels
US7836649B2 (en) 2002-05-03 2010-11-23 Faus Group, Inc. Flooring system having microbevels
US8112958B2 (en) 2002-05-03 2012-02-14 Faus Group Flooring system having complementary sub-panels
US8181407B2 (en) 2002-05-03 2012-05-22 Faus Group Flooring system having sub-panels
US20040200165A1 (en) * 2002-05-03 2004-10-14 Faus Group, Inc Flooring system having sub-panels
US20060005498A1 (en) * 2004-07-07 2006-01-12 Vincente Sabater Flooring system having sub-panels with complementary edge patterns

Similar Documents

Publication Publication Date Title
US2484801A (en) Centering device
US2594901A (en) Axial impact type tang break-off tool
US2167014A (en) Socket-shank structure
US3172204A (en) Automatic center punch and the like
US1195777A (en) burton
SU1114327A3 (en) Composite writing instrument
US2905166A (en) Bow string nock
US2676508A (en) Stud for explosive installation
US2384707A (en) Automatic center punch
US2533851A (en) Tool
US5797534A (en) Plug driving apparatus with a riser returning automatically to the firing position
US4134527A (en) Powder charge operated apparatus
US2479431A (en) Safety mechanism for explosively actuated tools
US2685824A (en) Pressure controlled locating device
US769939A (en) Golf-club.
US9389031B2 (en) Removable pin with insertion aperture
US7537001B2 (en) Toy gun for launching an elongated dart and a method of using pressurized air to launch an elongated dart from a toy gun
US2488894A (en) Socket wrench with nut ejector
US4054067A (en) Compact screwdriver bit
US4934081A (en) Retainer for revolver yoke stud
US3000086A (en) Cam locked sheet metal clamp with independently operable expander pin
US2989101A (en) Hammers
US1260264A (en) Wad-cutter.
DE102010062368A1 (en) Driving device for driving e.g. nail workpiece in building construction project, has blocking member arranged in movement path of device and blocking device from moving to outside position when contact element is in extended position
US2537754A (en) Spring-projected fish spear