US1133443A

US1133443A - Portable circular handsaw.

Info

Publication number: US1133443A
Application number: US80098713A
Authority: US
Inventors: Louie Hypolite Martin
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-11-14
Filing date: 1913-11-14
Publication date: 1915-03-30
Anticipated expiration: 1932-03-30

Description

L. H. MARTIN.

PORTABLE CIRCULAR HANDSAW.

APPLICATION FILED NOV. 14, 1913,

L. H. MARTIN. PORTABLE CIRCULAR HANDSAW.

APPLICATION FILED NOV. 14, 1913.

1,1 33,443, Patented Mar. 30, 1915.

2 SHEETS-SHEET 2.

III

WITNESSES I/VVE/l/TOR Specification of Letters Patent.

FFTQE.

PORTABLE cracn'naa nannsaw.

Patented Mar. 34), 1915.,

Application filed November 14, 1913. Serial No. 800,987.

To all whom it may concern:

Be it known that I, Loom Ha MARTIN, a citizen of France, and a resident of Augusta, in the county of Kennebec and State of Maine, have invented a new and Improved Portable Circular Handsaw, of which the following is a full, clear, and exact description.

My invention has, for its object to provide a portable circular hand saw with mechanical means for operating the saw.

Another object of the invention is to so construct the parts that the saw which is of the circular type, may be conveniently replaced as may be desired, either by a new saw or with a saw of a different size, or with teeth of any type to meet the conditions of use.

. Additional objects of the invention will appear in the following specification, in which the preferred form of my invention will be found described.

In the drawings similar reference characters refer to similar parts in all the views, in which Figure 1 is a view showing one side of the invention; Fig. 2 is a plan view of Fig. 1; Fig. 3 is an enlarged view showing a portion of the other side of the invention; Fig. 4 is a sectional view on the line 4-4 of Fig. 3; Fig. 5 is an enlarged sectional view on the-line 55 of Fig. 2; Fig. 6 is an enlarged fragmentary view, showing in section the means for holding in position the stud to which the circular saw is secured; Fig. 7 is a fragmentary view, showing the means for holding in positionthe bevel gear mounted on the shaft; Fig. 8 is a sectional view on the line 8'8 of Fig. 2; and Fig. 9 is a sectional fragmentary view, showing the guard for the switch.

" By referring to the drawings it will be seen that a motor casing 10 is provided, this motor casing being constructed in

sections

11 and 12, which are secured together by means of screws 13, which pass through the openings in the lugs 14, projecting from the sections 12 and which mesh in threaded openings in the lug 15,.projecting from the section 11. A head 16 is secured to one of the sections of the motor casing, this head 16 having a slot 16 through which the shaft 17 may pass when the motor to which the shaft is secured is removed from the motor 18, having

arms

19 and 20, a bearing member 21 being secured to the

arms

19 and 20.

at one side of the open frame, this hearing member 21 being provided for engagement by one side of the shaft 17, a companion bearing member 22 engaging the other side of the shaft 17 forming a bearing for said shaft. The bearing member 22 is secured to the bearing member 21 by screws 23. The shaft 17 has

collars

24 and 25 which engage the end of the bearing to prevent any longitudinal movement of the shaft 17. Beyond the collar 25 at 26, the shaft is angular in cross section and on this portion of theshaft, there is mounted a bevel gear 27 for moving longitudinally on the shaft and for rotating therewith. The outward movement of this gear 27 is limited by the washer 28. At the end of the shaft 17 as a means forholding the gear 27 outward against the washer, an arm 29 is provided which is pivoted to the shaft 17 at 30 and which when moved to the position shown in Fig. 7 of the drawings, serves to hold the gear 27 in engagement with the gear 31 secured to the circular saw 32. This circular saw 32 is mounted on a stud 33 which is normally disposed in the slots 35 and is seated against the bearing surfaces 34 in the arms20 of the open frame. At the sides of the slots 35 there are grooves 36 for receiving the ribs 37 on the bearing members 38, these bearing members 38 being held against the under side of the stud 33 by means of the arms 39 pivoted to the open frame 18 at 40, the arms 39 having recesses 41 for receiving the screws 42, so that the screws 42 may be turned home against the arms 39 at the sides of the recesses 41 for holding the arms 39 in position to retain the bearing members 38 in the slots 35. The screws 42 mesh in threaded openings at the bottom of the open frame 18.

From the construction which has been described, it will be seen that one of the circular saws may be readily removed to permit the use of another circular saw of greater diameter or with teeth of any type, for the arm 29 may be moved to a position at right angles to the shaft 17, to permit the rearward movement of the gear 27, after which the arms 39 may be moved at right angles to the open frame, to permit the downward movement of the bearing members 38. When this has been done, the circular saw 32 together with the stud may be moved downward into the slots 35 to free the circular saw 32 from the shaft 17 and the open frame 18. Another. circular saw may be secured in position by moving .its stud 33 in the slot 35, after which the hear ing members 38 may be secured in position and the gear 27 may be moved into engagement with the gear 31 which is secured 'to the new saw 32 and held in this position by the arm 29.

As a means of protecting the top of'the circular saw 32, a guard 43 is provided, this guard 43 having two centrally located standards 44, each provided with a depending pin 45 for engagement in orifices in the open frame 18, these standards 44 being disposed one at each side of the circular saw 32, as will-be readily understood. The inner ends of the guard 43 have flanges 45 which' are provided with slots 46 for receiving the shanks of the screws 47 It will be seen that when the guard 43 has been raised sufiiciently highto remove thepins 45 from the orifices, that theguard may be moved forward relatively to the open frame -,18 to free the flanges45 from the screws 47. The front of the guard 43 has a depending flange 48, which is provided with an orifice, through which the shank of the screw 50 is disposed, this shank of the screw 50 meshing in a threaded orifice in a head 52 secured to the guide members 53, which are provided for movement in the guideways 54 at the extreme end of the open frame 18. The guide members 53 have threaded orifices 1n which are disposed the screws 56, so that'when the screws 56 are turned by their heads 57, the screws will engage the open frame 18, at the inner sides of the guideways 54 for holding the guide members 53'relatively to the open frame. This means for securing the forward end of the, guard 43 is provided so that it may be adjusted to accommodate guards for circular saws greater or lesser in diameter. As a means of limiting the depth of the kerf made by the saw, a gage 58 is provided, this gage 58 having a roller 59 journaled atits lower end and being provided with a slot 60, in which the guide screws 61 are disposed, these guide screws being mounted at the side of the open frame 18. 'When the gage 58 has been adjusted. as may be desired, with reference to the periphery of the circular saw 32, the gage '58 is secured in adjusted position by the screw 62, whichis disposed through the slot 60 and which meshes in a threaded orifice in the open frame. When the screw 62 is turned home, itengages the gage 58 at the sides of the slot 60, and presses the guide member against the openframe to secure the guide member relatively thereto. The upper end of the gage 58 is provided with a flange 63 which serves as a convenient means for adjusting the guide member relatively to the which when pressed downward connects the current passing through the cable 66 with the motor inclesed within the motor casing 10. -It willtherefore be seen that the current may be turned on by the operator with the pressure of his thumb against the switch 65. As a means of protecting the switch 65, so that it may not be operated at an inopportune time, a guard 67 is provided, which is disposed over the switch 65 when the saw is not in use, the guard 67 telescoping with the guard member 68 when it is pushed forward to cover the switch 65. The guard 67 is normally held over the switch 65 by means of the spring 69, which is shown in Fig. 9 of the drawings;

As a means ofstopping the saw '32 when the current has been turned off, I provide a friction member 7 0, which is mounted on a stud 72, disposed through an orifice 71 in the open frame 18, this stud being held nor mally in the position shown in Fig. 2, by means of the spring 73 which is curved around the stud 72 and-is disposed between the open frame 18 and the head 74, with which the stud 72 is provided. When it is desired to stop the saw 32 after the current has been turned ofl",the stud 72 is pressed inwardly against the tension of the spring 73 to bring the friction member into engagement with the saw 32.

Having thus described my invention, I claim asnew and desire to secure by Letters Patent In a portable circular hand saw, a frame, a stud journaled in the frame, a saw mounted on the stud for rotating therewith, a saw guard disposed .ov'er' the saw, means for detachablv securing one end of the saw guard to the frame, there being a guideway in the frame, a guide member for moving in the guideway, a flange on the other end of the saw guard, and means for detachably se curing theflange to the ide member.

In witness whereof have signed my name to this specification in the presence of twosubscribing witnesses.

LOUIE HYPOLITE 'MARTIN.

Witnesses:

CORA A. Jones, FLORA E. PIERCE.