US1432098A - Safety guard - Google Patents

Description

F. S. BENEDICT.

SAFETY GUARD.

APPLICATION HLED MAR. 1, 1922.

agma, Patented 00. 17,1922,

2 SHEETSSHEET I.

W s/Q m8 @7 2 ffi Mary HS BENEDICT.

SAFETY GUARD.

APPLICATION FILED MAR. I. 1922.

sgmao mum 001117 11922.

2 SHEETS-SHEET 2- Patented @et. 1?, I922.

T%WTED STATES PATENT SAFETY GUARD.

Application filed March 7, 1922.

To all whom it may concern:

Be it known that I, FREDERICK S. BENE- DIo'r, a citizen of the United States, residing at Granston, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Safety Guards, of which the following is a specification.

My invention relates to safety guards for pulleys and. belts.

The essential objects of my invention are to conform to the compulsory requirements of liability insurance company standards including the avoidance of an opening greater than one-half an inch within four inches of the part guarded; to provide a single structure adapted for use upon pulleys of varying sizes and in different or changed locations and upon various machines, and upon belts disposed vertically, or inclined to the right or left, or converging or diverging; to enable standardization of parts, minimize expense of construction, and facilitate application to the parts to be protected.

To the above ends essentially my invention consists in such parts and in such combinations of parts as fall within the scope of the appended claims.

In the accompanying drawings which form a part of this specification,

Figure 1 is a perspective view of a guard embodying my invention,

Figure 2, a vertical central section of the same showing in side elevation a pulley and a belt enclosed thereby,

Figure 3, a rear elevation of the same,

Figure 4, a section of the guard on line 4-4 of Figure 2, and

Figure 5, a partial section, corresponding with that of Figure 2, of another position of a belt enclosing member.

Like reference characters indicate like parts throughout the views.

In its preferred form of embodiment my device comprises a drum 7 and tangentially disposed sectional tubes or wings 8 pivotally attached thereto. The drum serves as a housing for a pulley 9 mounted on a shaft 10, and the tubes constitute closures'for a belt 11 engaging the pulley. In detailthe drum comprises front and rear head end plates13 provided with central openings 14 and spaced peripheral lugs 16 provided with perforations 17 to receive bolts on tie rods 18, each having a squared head 19 and a thread 20 engaged by a nut 21. The side 22 Serial No. 541,765.

of the drum, which is cylindrical in shape, may be engaged with the heads in any desired'manner. In this instance it comprises two spaced sections consisting of a semicircular bottom section 23, and an arcuate top section 24 spaced at both ends from the first section forming resultant lateral openings 25. Peripheral lugs 27 on opposite ends of these sections register with the lugs 16 and have perforations 26 through which pass the rods 18. By the described means the parts of the drum are readily assembled and disassembled. One or both of the end plates 13 may have a radial opening 29 to receive a removable filling strip 30 fastened in this case by transversely disposed spaced metal plates 32 fast to the strip and project ing laterally therefrom, and provided in their extended portions with slots 34 adapted to loosely receive pins 35 in the end plate. The opening 29 which extends from the periphery of the end plate to the opening- 14 admits passage of a shaft 10 to the latter, after which the opening 29is closed by the filler strip.

Loose upon diametrically opposite rods 18, disposed in the same horizontal plane adjacent the lower ends of the openings 25 arehinge sleeves 37 upon depending hinge straps 38 fast to the members 8 by pins 39 or otherwise. The described parts constitute hinge members for the belt housing members or arms 8. As illustrated the latter include lower and upper tubular sections 41 and 42 of oblong rectangular cross section, the latter telescoping in the former. Each section 41 comprises an outer wall 44 to which the hinge is attached, an inner wall 45, and front and rear walls 46 and 47. The rear wall 47 has a central longitudinal slot 48 extending throughout its length to permit the admission of a belt 11. The lower portion of each wall 45 is cut away to form an opening 50. In this instance the four corners of sections 41 are reinforced by angle irons 51.

The sections 42 are a sliding fit in the sections 41 and are vertically adjustable by any convenient means. In this instance the ad justing means consists of a removable plug 53 insertable in a perforation 54 in a wall of the section 41, and in one of a vertical series ofperforations 55 registering with the first perforation. The rear walls 58 of the section 41 are provided with central longitudinal slots 59 extending throughout their lengths and registering with the slots 48 for admission of a belt 11. The corners of sections' 4-2 are reinforced by angle irons 60. The vertical adjustability of the sections are useful in fulfilling insurance requirements of sheathing the belts any given height above the floor.

Slidably mounted upon the inner faces of the inner walls 45, and closing the upper portions of the openings 50 are slides or plates 62 terminating in hinge sleeves 63 engaging pintles 64 embraced by hinge sleeves 66 on arcuate slides or plates 67 slid-v ably engaging the inner face of the drum section 24, and closing the upper portions of the openings 25. The slides 62 are pressed into contact with the walls 4-5 by resilient guiding fingers 69 overlapping the slide and fast at their upper ends by rivets 70 to the walls. Spaced plates 71 are fastened by rivets 72 in their central portions to the section 24: and their end portions constitute resilient guide fingers 74: which overlap the adjacent inner end portions of the P at s The lower portions of the sections 41 pass through the openings 25 and into the drum, the walls 44c only being tangential thereto. The lower portions of the walls 46 and 47, by virtue of the openings 50, straddle the pulley 9. and slide freely in contact with or adjacent the inner faces of the drum ends. Hence nothing impedes an inwardly inclined position of the sectional arms 8 such as shown in broken lines in Figure 5'.

It will be observed that changing the inclination of one or both the sectional arms 8 inwardly or outwardly leaves no resultant openings in either the cut away portions of the drum or of the sections 41, because of the slidable character of the pivoted plates 62 and 67.

If desired auxiliary means may be cmployed to assist to maintain the arms 8 in fixed relation tov each other after being applied to the machine. One such means consists, as shown in Figure 1, of a flat rod or latch 76 pivoted at one end to a pin 77 on one section iland provided near its other end, with a series of lateral cavities 7 8 in its lower edge in one of which registers a pin 80 fast in the other section 41.

I claim 1. In a machine safety guard, a drum provided with peripheral openings, tubular arms pivotally supported on the drum adjacent the, openings, and plates slidably mountedon the drum across the openings, carried by the arms.

2 In a machine safety guard, a drum provided with peripheral openings, tubular arms pivotally supported on opposite sides.

' of the drum and provided with lateral openings; adjacent. the drum, plates, slidably mounted, on the drum across'the peripheral the lateral openings pivotally attached to end plates, peripheral projections on the 1 ,aeaoes openings, and plates slidably mounted on the arms across the lateral openings pivotally connected with the first mentioned plates.

3, In a machine safety guard, a drum provided with peripheral openings, tubular arms pivotally supported 011 the drum adjacent the openings, guides fast to the drum, slidable plates engaging the guides carried by the arms and movable across the openings.

4. In a machine safety guard, a drum provided with peripheral openings, tubular arms pivotally supported on opposite sides of the drum provided with lateral openings adjacent the drum, guides fast to the drum, slidable plates engaging the guides movable across the peripheral openings, guides fast to the arms, and slidable plates" engaging the last mentioned guides movable across the first mentioned plates.

5. In a machine safety guard, a drum comprising a body, end plates'engageable with the body, peripheralprojections on the body, and bolts connecting the body and end plates through the projections, tubular arms, andhinge members carried by the arms engaging the bolts on opposite sides of the drum. f l r 6. Ina machine safety guard,'a body" comprising a semi-circular bottom section and an arcuate top section spaced from each other to constitute openings, end plates, a bolt connecting the top section with the end plates, bolts connecting the bottom section with the end plates, and tubular arms pivotally mounted on the last mentioned bolts movable into and out of the openings- 7. In a'machin'e safety guard, a drum provided with a radial opening, tubular arms carried by the drum, and a guard strip detachably mounted in the arm acrosstheopening.

8. In a machine safety guard, a drum provided with a radial opening, a tubular arms carried by the drum, pins in the drum beside the opening, a guard strip in the opening, and cross pieces on the strip provided with cavities adapted to receive the pins.

9. Ina machine safety guard, a drum, tubular arms pivotally supported on opposite sides of the drum, a latch pivotally mounted on. one arm and provided with a 1 longitudinal series ofcavities, and a pro j ection on the other arm adapted to register in one of the cavities. v

10. In a machine safety guard, a drum, tubular sections pivotally supported. on opposite sides of the drum provided with iongitudinal SlOtS,faI1d tubular sections telescoping n the first sections andfprovi'ded with, longitudinal slots registering with the,

slots in the first sections.

11. In a machine safety guard, a drum, tubular sections pivotally mounted on the drum provided With longitudinal slots, tubular sections slidably mounted in the first 5 sections provided with longitudinal slots registering With the first slots, one of said sections being provided With a longitudinal series of cavities, and a, projection in the other of said sections adapted to register in said cavities.

In testimony whereof I have afiixed my signature.

FREDERICK S. BENEDICT.

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