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Publication numberUS3364580 A
Publication typeGrant
Publication dateJan 23, 1968
Filing dateDec 27, 1965
Priority dateDec 27, 1965
Publication numberUS 3364580 A, US 3364580A, US-A-3364580, US3364580 A, US3364580A
InventorsLucia Robert E
Original AssigneeRobert E. Lucia
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Measuring attachment for chain saws
US 3364580 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Jan. 23, 1968 R. E. LUCIA 3,364,580


ATTORHEY Jan. 23, 1968 R. E. LUCIA 3,364,580

MEASURING ATTACHMENT FOR CHAIN SAWS Filed Dec. 27, 1965 3 Sheets-Sheet 2 figs 4 v A 55 6 37 @Z] 7 jg AH AU 0%) IN \I EMT-O & IQQGEET'ZUC/H ATTORNEY Jan. 23, 1968 R. E. LUCIA MEASURING ATTACHMENT FOR CHAIN SAWS 5 Sheets-Sheet 5 Filed Dec. 27, 1965 \NQENTOK P05527- Lac/A:

ATTORNEY United States Patent Ofihce 3,364,580 Patented Jan. 23, 1968 3,364,580 MEASURING ATTACHMENT FOR CHAIN SAWS Robert E. Lucia, Westboro, Wis. 54490 Filed Dec. 27, 1965, Ser. No. 530,243 1 Claim. (Cl. 33185) ABSTRACT OF THE DISCLUSURE A portable chain saw provided with a laterally extendable measuring scale driven by the chain saw motive power, retractable by the same means.

This invention relates to improvements in measuring attachments for chain saws, and more particularly to a novel motor operable tape measure.

An object of the invention is to provide a device of the type which will enable an operator to saw through a log, extend the tape by means of the saw motor to a required length, saw said length, and return said tape by motor or spring means.

Other and further objects of the invention will appear as the description proceeds, reference being had to the accompanying drawing, in which:

FIG. 1 is a view in perspective of a chain saw equipped with a measuring attachment embodying the invention.

FIG. 2 is a plan view of the same with the tape partially extended.

FIG. 3 is a vertical sectional view taken on line 33 of FIG. 4.

FIG. 4 is a cross-sectional view taken on line 4-4 of FIG. 1.

FIG. 5 is a view taken on line 55 of FIG. 4.

FIG. 6 is a fragmentary cross-sectional view of the means for engaging and disengaging the tape with the sprocket.

FIG. 7 is a vertical sectional view taken on line 7-7 of FIG. 8.

FIG. 8 is a similar view taken at right angles to that of FIG. 7.

FIG. 9 is a horizontal secitonal view taken on line 99 of FIG. 8.

Referring more particularly to the drawings, the numeral 10 refers to a conventional chain saw. Attached exteriorly to its casing 11 is an auxiliary casing 12 containing means for projecting and retracting a measuring rule 13 at a right angle to the saw chain 14. The rule 13 is graduated as at 15 to indicate inches from the chain 14 to the end piece 16 on the rule 13.

As shown in FIGS. 3 and 4, the engine shaft 17 carries a centrifugal clutch 18 and the saw chain sprocket 19. When the engine shaft exceeds a certain velocity the centrifugal clutch 18 engages to operate the saw chain sprocket 19 and the chain saw 10. A ring friction clutch element 20 is disposed externally of the centrifugal clutch casing 21. When the button 22 is pressed by the operator, rod 23 pivoted at 24 on the link 25 will move element 26 on splined shaft 27 to force the clutch member 23 to bear against clutch element 20, thus turning gear 29 and gear 30 meshed with the latter to rotate vertical shaft 31. The shaft 31 is crowned by a bevel gear 32 meshed with gear 33 on shaft 34 to drive sprocket 35.

A metal or plastic rule 13 is centrally longitudinally apertured at intervals as at 36 to engage with the teeth 37 of the sprocket 35. The inner end 38 of the rule 13 is secured by rivet 39 to the spring 40, which is in turn fastened by the pin 41 to the anchor element 42. The outer wall 43 of the auxiliary casing 12 carries interiorly thereof the plate 44 mounted for limited vertical movement on pins 45 within the slots 46, and normally maintained in uppermost position by the expansion coil spring 47. A pair of trunnion arms 48 and 49 extend laterally from the plate 44 and at their free ends journal the axle 50 of the roller 51 which normally bears upwardly sufficiently against the sprocket 35 to stop the rule 13 in extended position. A downward pressure on the projection 52 on the plate 44 will release the rule 13 and allow the spring 40 to retract the rule 13 backwardly into the auxiliary casing 12.

In FIGS. 7, 8 and 9 of the drawings, a modified form of the invention is shown, in which a chain saw casing has an attached auxiliary casing 61 communicating therewith. An aperture at 62 of casing 60 registers with an aperture at 63 of casing 61. An engine shaft 64 carries the centrifugal clutch 65 and saw chain 66. Pins 67 on hub 68 engage element 69 connected with shaft 70 to drive bevel gear 71 meshed with the horizontal bevel gear 72 connected by tubular element 73 with the disk 74 which will friction drive the wheel 75 engaged with splined element 76 which is integral with the shaft 77 carrying the sprocket 78 provided with teeth 79 which engage in the aligned apertures as at 80 of the measuring rule 81. A roller 82 is freely held by axle 83 in the bearings 84. The casing 61 has a separate upper portion 85 mounted for limited vertical movement and is normally held in raised position by means of the spring 86 based on element 87. The operator may move the wheel 75 laterally on the splined element 76 to bear against either side of the face of disk 74 by means of the knurled handle 88, and a downward pressure will thus project or retract the measuring rule between sprocket 78 and the roller 82. A spring may be provided on the inner end of rule 89 to facilitate its return to retracted position.

It will be understood that the device is capable of many modifications in structure and design, without departing from the spirit of the invention, within the scope of the appended claims.

Having thus described the invention, what is claimed and desired to be secured by Letters Patent of the United States, is:

1. An attachment for chain saws having an engine shaft comprising a rolled measuring rule, a centrifugal clutch mounted on said engine shaft, a horizontal rotatable shaft connected with said centrifugal clutch, a pair of meshed bevel gears connecting said horizontal shaft with a vertical shaft, a horizontal friction disk fixed to the upper end of the latter, a spring-mounted horizontal shaft disposed above said disk, a sprocket on the shaft engaged with said rule for projection and retraction thereof, a splined portion on the sprocket shaft, a friction wheel mounted for limited movement axially on said splined portion whereby said Wheel may be engaged with either margin of said disk to govern direction of movement of the sprocket and tape, and manual means for axially moving said wheel and pressing the same downwardly against the friction disk.

References Cited UNITED STATES PATENTS 2,704,401 3/1955 Mohr et al. 33l26.6 2,709,220 5/1955 Spector 242-54 2,765,007 10/1956 Hoff-man 33202 X 2,810,409 10/1957 Ibelle et a1 14332.14 X 3,276,490 10/1966 Johansson 14332.13

FOREIGN PATENTS 581,061 7/1933 Germany.

WILLIAM D. MARTIN, 1a., Primary Examiner.


Patent Citations
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US2704401 *Dec 10, 1953Mar 22, 1955John Mohr And SonsStock line recorders
US2709220 *Jan 25, 1954May 24, 1955Nat Electronic Mfg CorpExtensible and retractible antenna
US2765007 *Dec 13, 1954Oct 2, 1956Hoffmann Karl EBolt measuring attachment for chain saws and the like
US2810409 *Oct 26, 1955Oct 22, 1957Lombard Governor CorpRotary cutter attachment for power units of chain saws
US3276490 *Mar 5, 1964Oct 4, 1966William Johansson JosefPortable cutting device
DE581061C *Jul 20, 1933Stihl Maschf AndreasVorrichtung an Kettensaegemaschinen fuer den Antrieb einer biegsamen Welle
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3473751 *Jul 24, 1967Oct 21, 1969Quenote & Cie S A R LLinear measuring instrument with driven measuring tape
US4185382 *Sep 18, 1978Jan 29, 1980Rawlinson John P JrChain saw gauging attachment
US4186490 *Jun 13, 1978Feb 5, 1980Stanley-MaboTape-type linear measuring instrument
US4233739 *Jul 16, 1979Nov 18, 1980Hinrichs Leslie WChainsaw accessory
US4275504 *Apr 28, 1980Jun 30, 1981Chontos Stephen GCutting saw measuring attachment
US4377910 *Jun 8, 1981Mar 29, 1983Landry Jr Ernest AChainsaw attachment
US4388762 *Aug 5, 1981Jun 21, 1983Debell Jr John HChain saw measuring device
US4545122 *Sep 12, 1983Oct 8, 1985David L. Durfee, Jr.Chain saw gauging attachment
US4561186 *Feb 13, 1984Dec 31, 1985Keefe Arthur NSaw gage
US4951398 *Nov 7, 1989Aug 28, 1990Bennett Robert WMeasuring and guiding attachment for a chain saw
US4984371 *Jul 25, 1989Jan 15, 1991Fredrickson Robert NChain saw log gauge for obtaining firewood logs of uniform length
US5875987 *Oct 28, 1997Mar 2, 1999Pullen; ScottPower operated tape measure
US5901457 *Jul 28, 1997May 11, 1999Harding; James M.Chain saw ruler attachment
US6735881 *Feb 5, 2003May 18, 2004Robert F. NesselrotteFirewood measuring and marking apparatus
US7089670 *Sep 16, 2002Aug 15, 2006Aktiebolaget Electrolux (Publ)Portable motor chain saw
US20070108181 *Nov 6, 2006May 17, 2007Bsh Bosch Und Siemens Hausgerate GmbhDomestic appliance with a linearly movable component
USRE37824 *Feb 27, 2001Sep 3, 2002Scott PullenPower operated tape measure
DE3401605A1 *Jan 18, 1984Jul 18, 1985Lutz Eugen MaschMeasuring system for positioning devices
EP0072011A2 *Aug 7, 1982Feb 16, 1983Möhlenkamp, AlfonsPortable chain saw
U.S. Classification33/630, 30/371, 242/390.2, 30/383
International ClassificationB27B17/00
Cooperative ClassificationB27B17/0025
European ClassificationB27B17/00D