US388069A - Band-saw mill - Google Patents

Band-saw mill Download PDF

Info

Publication number
US388069A
US388069A US388069DA US388069A US 388069 A US388069 A US 388069A US 388069D A US388069D A US 388069DA US 388069 A US388069 A US 388069A
Authority
US
United States
Prior art keywords
shaft
wheel
standard
saw
guide
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
Publication date
Application granted granted Critical
Publication of US388069A publication Critical patent/US388069A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D55/00Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
    • B23D55/06Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts of drives for strap saw blades; of wheel mountings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/707By endless band or chain knife
    • Y10T83/7226With means to guard the tension
    • Y10T83/7239With means to vary distance between pulley or sprocket axes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/707By endless band or chain knife
    • Y10T83/7226With means to guard the tension
    • Y10T83/7239With means to vary distance between pulley or sprocket axes
    • Y10T83/7245And angular relationship of axes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/707By endless band or chain knife
    • Y10T83/7264With special blade guide means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8878Guide
    • Y10T83/8889With means to adjust position

Description

(No Model.) e sheets-sheet, 1. W. F. PARISH.
BAND SAW MILL. No. 888,069. Patented Aug. 21, 1888.
iii
q/vbbvmcm 8mm 2 I 7Vz7h'am 1713011976.
2.6 v 38 13 3H0 z 1 1 e LAO N. PETERS. PhoOo-Liihogrnphun Washington, [1Q
(No Model.) 6. Sheets-Sheet 2.
W. F. PARISH.
BAND SAW MILL. N0. 388,069. Patented Aug. 21, 1888.
flap? f I I I I I I I I WW QW'H/wwm awn/to z wan/JV 6 Sheets-Sheet 3.
(No Model.)
W. F. PARISH.
BAND SAW MILL.
Patented Aug. 21, 1888.
Fig. :5.
A\\ \mkxmxx N. FEIERS Pnvwuma n tm. Washingmn. D. C.
(No Model.) 6 Sheets-Sheet 4.
W. F. PARISH.
BAND SAW MILL.
No. 388,069. Patented Aug. 21, 1888.
Fly g 7 7 A 3 /a 2& l5 075$ //y D 3/ Jj 77 VMVAVAVW AV AWWA AV WA AVWWWWA WW @Wm 00 awuwwl o z E I 77 17212727? Ifawzkk.
N PETERS. "nib-lithographs Wuh'mgwn. we
(No Model.) 6 SheetsSheet 5.
W. F. PARISH.
BAND SAW MILL.
No. 388,069. Patented Aug. 21, 1888.
N. FEYERS. mwumo mr. Washlngum o c.
6 Sheets-Sheet 6.
(No Model.)
W. F. PARISH.
BAND SAW MILL.
No. 388,069. Patented Aug. 21, 1888.
In zrenTo 7,
49 IL I UNTTETT STATES PATENT @rrrcn.
\VILLIAM F. PARISH, OF MINNEAPOLIS, MINNESOTA.
BAND-SAW MILL.
SPECIFICATION forming part of Letters Patent No. 388,069, dated August 21, 1888.
Application filed March 2, 1888.
T0 aZZ whom it may concern.-
Be it known that I, WILLIAM F. PARISH, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain Improvements in Band-Saw Mills, of which the following is a specification.
The object of my invention is to provide a bandmill with an improved construction of supporting-frame, with improved means for supporting the upper wheel, with an improved construction of upper guide and means for adjusting the same, with improved means for supporting and adjusting the lower wheel, and with improved means for permitting the saw to be placed upon and removed from the lower wheel.
In the common type of band-mills the upper wheel is mounted at or near the end of its shaft, and the shaft is supported in bearings upon a column or pillar, so that the wheel overhangs the standard or column upon which the shalt is mounted. Sometimes these mills are provided with a light bearing outside of the overhanging wheel. The lower wheel is likewise usually mounted upon the end of the shaft and outside both of its bearings. The main objection to this construction is that the great strain brought upon the saw tends to throw downward the. free or unsupported end of the upper shaft, or the end that carries the wheel, so that the saw does not run evenly. The main difference between my bandmill and the band-mills of the prevailing type consists in the fact that in my machine both the upper and the lower wheels are secured to their shafts at points substantially midway between their bearings. Both wheels are therefore firmly supported, and there is no possibility of the shafts being tipped in either direction by the strain brought upon them by the saw.
There are other material and essential points of difference between my construction and those heretofore used, all of which will be fully understood from the following detailed de scription, taken in connection with the accompanying drawings, in which- Figure 1 is a side elevation of my improved machine. Fig. 2 is an end elevation of the same. Fig. 3 is a central vertical section.
Fig. 4. is a vertical section at right angles to the plane of Fig. 3. section taken on line :0 x of Fig. 2.
Fig. 5 is a. horizontal Fig. 6 is Serial No. 265,948. (No model.)
a horizontal section on line y 1 of Fig. 2, the upper guide being omitted. Fig. 7 is a horizontal section on line .2 z of Fig. 2. Fig. 8 is a detail. 1
In the drawings, 2 represents the main frame or standard of the machine, which is preferably formed of a hollow casting having a broad base adapted to be supported upon a suitable foundation, a single upright column rising therefrom to a point a short distance below the lower edge of the upper wheel, where it is dividedinto twostandards,38,havingan opening between them, in which the wheel is received, and each provided with a suitable movable bearing or journal-boX for one end ofthe shaft of the upper wheel. The upper wheel, 5, is mounted upon its shaft 7 between the two journal-boxes 9. These boxes therefore receive substantially equal proportions of the weight ofthe wheel and shaft and of the strain exerted by the saw. The journal-boxes 9 are each provided with a depending bar, which is received in a vertical bearing in the upper end of the single standard 8, and is adapted to move vertically therein. The lower ends of these bars are connected by links 11 with thepivoted levers 13, that are arranged within the upper parts of the standards 3. These lovers have their opposite ends connected by rods 15 with short arms 17 on a shaft, 19. The shaft 19 has an arm, 21, secured to it, and upon this arm is suspended a boss,23,adapted to receive weights for counterbalancing the upper wheel. A sufficient weight may be applied in this manner to hold the upper wheel with a yielding tension against the saw and cause it to take up the slack of the saw in a manner well understood in the art. In order to prevent the weight from dropping too far and moving the wheel up too far should the saw break, or when there is no saw on the wheels, I extend the ends of the lovers 13 through slots in the wall of the standards and the ends of these slots form stops which limit the movement of the levers 13, and consequently the movement of the upper wheel.
The support for the upper guide consists of a substantially Ushaped frame or casting,25, which is supported upon ways 27 upon the main standard of the machine. These ways are parallel to each othcr,and the guide-frame is adapted to move vertically thereon to bring the upper guide into its proper position over the log that is on the carriage. This construction of the guide-frame 25 permits the guide to be moved very close to the point where the saw passes off from the upper wheel. The lower portion of the upper wheel projects into the open space between the two legs of the guide-supporting frame. A sheave, 29, is mounted within the hollow standard at a point near the upper end of the ways 27, and
a similar sheave, 31, is mounted at a point near the lower ends of the ways. A shaft,33, is mounted in hearings in the main standard and extends through it from one side to the other,and is provided with the spools 35, which are arranged in line with the sheaves 29 and 31. A cable, 37, is secured at one end to the guide-frame 25, passes over the sheave 29, several times around the spool 35, and under the sheave 31, and has its other end attached to the guide-frame 25. The shaft 33 is provided with the hand-wheel 39, arranged inside of the standard, and by means of this handwheel the shaft may be turned upon its axis, and thereby the guide-frame and the guide supported by it be raised or lowered upon the ways 27. In order to counterbalance the weight of this guide-frame the shaft 33 is provided with a spool, 41, around which a cord, 43, is wound in the opposite direction from the cord 37. Aweight, 45, is supported upon this cord, and by this means the weight of the guide-frameand guide will becounterbalanoed,
and the guide may be easily operated by turning the hand-wheel 39. The outer end of the guide-frame 25 is inclined, as shown in Fig. 1, and is provided with a groove in which is mounted a block, 51, that is adapted to be moved up and down in this groove.
The block 51 is provided with a curved face havinga transverse groove, in which the guide proper, 53, is mounted. By moving the guide 53 forward and back in the grooved slot in the block 51 the guide may be given a rotary adjustment as it is moved forward and back, and
by adjusting the block 51 up and down in the groove in the inclined face of the frame 25 the guide will be moved toward or from the main standard, and thereby the saw will be moved in one direction or the other, as desired. The lower guide is preferably similar in construction to the upper guide; but its block 51 is mounted on a stationary arm, 55, that is secured to the base of the standard, as shown in Fig. 1.
The base of the main standard rests upon a foundation that is usually arranged upon a level with the floor-line of the mill. Beneath I this the lower shaft is mounted, preferably,
upon supports 57, arranged at the front and back of the main standard, already described. The supports 57 are preferably formed as open castings or frames having a series of independent legs, 59. In order that the endless saw may be readily applied to or removed from the lower wheel, I prefer to provide one of the supports 57 with a portion which may be taken out or moved, so as toleave a gap or opening through which the saw may be carried into the space between the supports and beneath the shaft of the lower wheel or be taken out therefrom. This portion of the support, as here shown, consists of a section,61, in each of the legs 59, that'is adapted to be held therein by means of a bolt, 63. With this construction each of the sections may be removed in turn, the saw carried through the opening formed thereby, and the section replaced before another section is removed. The support will in this way always be sufficient for the weight which comes upon it, as any one section may be removed without materially weakening it. I do not wish to confine myself, however, to this arrangement of the removable sections or portions of the support, as the same may be obviously varied without departing from my invention, or to confine myself to the form of support shown, as anysuitable support may be used. It is desirable, however, that the movable portion of the support shall be so arranged that only a part of it need be moved at atime. Each support 57 is also preferably provided with a substantially rectangular opening, in which the supporting and adjusting devices for the ends of the shaft are arranged.
A cast-metal frame, 65, is arranged to move upon vertical ways 67, formed upon the opposite sides of this rectangular opening. A threaded rod, 69, is secured to the frame and projects downward therefrom. A revolving nut, 71, engages this threaded rod, and is supported in the opening in the frame 57, which forms a bearing therefor, and is held in position by means of a collar formed on it at its upper end and resting upon the frame 57, and a collar, 73, secured upon its lower end, as shown in Fig. 1. The nut is thus permitted to revolve in hearings in the frame 57, but vertical movement thereof is prevented. A gear-wheel, 75, is secured to the revolving nut 71, and is engaged by a pinion, 77, upon a vertical shaft, 79, that extends above the floorline of the mill, and is provided at its upper end with a beveled gear, 81. The construction and arrangement of these devices at the two ends of the shaft are preferably the same, as shown in the drawings.
Ashaft,83, is mounted in bearingsin the main standard of the machine,and is provided at one end with a bevel-gear, 85, engaging the bevelgear 81 upon one of the vertical shafts 79. A sleeve, 87, arranged at the other end of the shaft, is provided with the bevel-gear 89 that engages the bevel-gear 81 upon the other vertical shaft, 79. The sleeve 87 is mounted loosely upon the shaft 83, but is constructed to be engaged by a sleeve, 91, that is splined to the shaft and turns therewith.
The sleeve. 91 is arranged to slide on the shaft 83, and is provided with a suitable handle, 93. When the sleeve 91 engages the ICO will be operated simultaneously, and the two frames 65, which support the ends of the lower shaft,will be simultaneously raised or lowered.
\Vhen the sleeve 91 is out of engagement with the sleeve 87, only the shaft that is en gaged by the bevel-gear on the shaft 83 will be turned when the shaft 83 is operated,and only one end of the lower shaft will be raised or lowered. The lower shaft is mounted at each end in ablock,95,snpported upon the frame 65, and adapted to be moved transversely thereon. One of these bearing-blocks is provided with means by which it may be laterally adjusted on the frame 65. This, as here shown, consists of a threaded stud or rod, 97, projecting from one end of the bearing-block 95, and passing through a wornrgear which has a threaded opening in its center that engages the rod 97.. A shaft, 101, supported in suitable bearings and provided at its upper end,which is above the floor-line of the mill, with a hand-wheel, 103, has at its lower end a worm which engages the wheel 99. By turning this shaft the bearing-block 95 and the end of the shaft supported by it may be laterally adjusted on the frame 65.
It is sometimes desirable to adjust the upper guide by a power-driven device instead of adjusting it by hand. For this purpose the shaft 33 is preferably provided within the main standard with a frietion-wheel,105. A shaft, 107, is also mounted in this frame parallel to the shaft 33, and is provided with arms 109, in which are mounted the friction-wheels 111 and 113. A handle, 115, is provided on the outer end of the shaft 107. By turning the shaft 107 upon its axis either one of the wheels 111 or 113 may be thrown into contact with the wheel 105, or both of them may be held out of contact with it. A belt, 117, passes from the shaft of the lower wheel over both of the wheels 111 and 113,and drives them in opposite directions. An idler, 119, is preferably arranged to engage this belt. \Vith this arrangement when one of the wheels 111 or 113 is thrown into contact with the wheel 105, the upper guide will be moved in one direction, and when the other wheel is thrown into engagement with this wheel105,the upper guide will be moved in the other direction. The tightener keeps the belt taut,even though the shaft of the lower wheel may be raised or lowered a considerable distance. The shaft 101 moves vertically with the frame supporting the box of the lower shaft.
It will be seen that the front and rear of the standard are exactly similar, and that both wheels and both saw-guides are arranged centrally thereon. The blocks 53 may be turned upside down, so as to bring the open side of the guide in the other direction.
The driving-pulley and the shaft 101 for ad justing one of the boxes of the lower wheel may be applied on either side of the lower wheel, as preferred. The handwlieel 39 may be applied to either end of its shaft, and the shaft 83 may be reversed end for end and its operating-lever and clutch applied at the other side of the standards. In this way all of the adjusting and operating devices can be applied to the other side of the machine and the mill changed from a right-hand to a left-hand machine. The machine is so constructed that the adjusting and operating devices may be applied when the mill is set up either in front or back of the saw at the option of the saw yer, and may be changed in a few moments from one side to the other at will at any time. This enables the sawyer to stand in front or back of the saw at his pleasure,and it also permits the same construction of the machine to be used either as a right-hand or a left-hand mill.
The manufacturer can construct the machines all alike without regard to the way in which they are to be used, so that only one kind need be carried in stock, and when they are set up the guides may be forced in either direction and the adjusting and operating devices applied to either side of the standard and the machine used as a right-hand or a lefthand mill, and may at any time, without reeonstruction,be changed from one to the other.
I claim as my invention- 1. The combination, in a band-mill, of the cast-metal main standard provided at its top with the independent standards 3, projecting vertically therefrom and formed integrally therewith, the verticallymovable boxes mounted on said standards, the upper shaft mounted in said boxes, and the upper wheel arranged upon said shaft between said standards 3, substantiall y as described.
2. The combination, in a band-mill,with the standard, of the upper shaft mounted in vertieally-inovable boxes on said standard, the upper wheel secured upon said shaft between said boxes,and the upper guide-frame, 25, pro j ecting from said standard upon opposite sides of said wheel, and the saw-guide secured to said frame at its outer end, substantially as described.
3. The combination, in a band-mill,with the standard, of the upper shaft mounted in vertically-movable boxes on said standard, the up per wheel arranged upon said shaft between said boxes, the U shaped guide frame 25, mounted in vertical ways upon said standard and extending upon opposite sides of said wheel, and the saw-guide secured upon said frame, substantially as described.
4. The combination, in a band-mill, of the hollow standard, the upper shaft mounted in vertically-movable boxes thereon, the wheel mounted upon said shaft between said boxes, the U shaped guide-frame 25, mounted in vertical ways upon said standard, the sheaves 29 and 31, arranged within said standard near the upper and lower ends of said way, the shaft 33, arranged in said standard, provided with the spools 35, and the cables 37, secured to said guide-frame, passing over said sheaves and around said spools, snbstantiall y as described, and for the purpose set forth.
5. The combination, in a band-mill,with the hollow standards provided with the vertical ways 27, the U-shaped guide-frame mounted in said ways, the sheaves 29 and 31, arranged in said standard near the upper and lower ends of said ways, the shaft 33, mounted in said standard and provided with the spools 35 and 41, the cables 37, secured to said guide-frame,
passing over said sheaves and around said spools 35, and the cable 43, wound upon said spool 41 and provided with the counterbalance-weight 45, all substantially as described.
6. The combination, in a band-mill, with the standard, of an arm secured thereto and projecting toward the saw, and provided at its outer end with an inclined groove, a block mounted in said groove and adapted to be adjusted therein, and be thereby moved toward and from the standard, and provided in its outer face with a transverse groove, and a sawguide, 53, mounted in said transverse groove and adapted to be adj usted therein across the face of said block, substantially as described.
7. The combination, in a band-mill,with the main standard, of the upper shaft mounted in vertically-adjusted boxes thereon, the upper wheel arranged upon said shaft between said boxes, the U shaped guide-frame 25, adj ustably mounted upon said standardand projecting therefrom upon opposite sides of said wheel, and provided at its outer end with an inclined face having a groove therein, a block mounted in said groove and adapted to be adjusted therein, and a saw-guide adjustably mounted upon said block, substantially as described.
8. The combination, in a band-mill,with the hollow standard provided with the independent oppositely-projecting portions3 3, the vertically-movable boxes mounted in bearings upon said independent portions of the standard, the pivoted levers 13, arranged within said standard and connected with said sliding boxes and projecting through slots in the walls of the standard, the shaft 19, provided with the short arm 17, connected with said levers 13, and also provided with the arm 21, having the weight-receiving box 23 suspended thereon, substantially as described.
9. The combination, in a band-mill, of the lower shaft, bearing-blocks supporting its opposite ends, the lower wheel secured upon said lower shaft between said boxes, suitable frames supporting said boxes, one of said frames being provided with a movable portion through which the saw may be carried in applying it to or removing it from said lower wheel, substantially as described.
10. The combination, in a band-mill, of the lower shaft, boxes supporting the ends thereof, the lower wheel mounted upon said shaft between said boxes, suitable supports for said boxes, one of said supports being provided with a movable portion formed in separate sections, which, when moved, forms an opening in said support through which the saw may be carried in applying it or removing it from I said lower wheel.
the movable blocks 61 in said legs 59, substantially as described, and for the purpose set forth. 7
12. The combination, in a band-mill, of the lower shaft, boxes supporting the ends thereof, the lower wheel mounted and secured upon said shaft between said boxes, means for simultaneously raising or lowering both of said boxes, and means for independently raising or lowering one of said boxes, and means for horizontally adjusting one of said boxes.
13. The combination, in a band-mill, of the shaft mounted upon the vertically-movable boxes, the revolving nuts engaging threaded rods supporting said boxes, the gear-wheels 75, secured upon said nuts, the shafts 79, provided with pinions engaging said gear-wheels, and provided also with bevel-gears 81, the shaft 83, having the pinion 85, engaging the bevelgear on' one of said shafts 79, the sleeve 87, having a pinion, 89, engaging the bevelgear 81 on the other ofsaid shafts 79, and the sleeve 91, splined upon the shaft 83 and adapted to engage the sleeve 87 or to be disengaged therefrom, whereby both the said shafts 79 may be simultaneously operated to raise or lower both of said boxes, or one of said shafts may be operated independently of the other, substantially as described.
'14. The combination, in a band-mill, with the lower shaft and wheel, of the verticallymovable frames 65 and means for adjusting the same, the boxes 95, mounted upon said frame 65 and adapted to be laterally adjusted thereon, the threaded rod 97, secured to one of said boxes, the threaded worm-wheel 99, engaging said rod, and the shaft 101, for operating said worm-wheel, said rod 97, wormwheel, and shaft being mounted upon and moving with said frame, substantially as described.
15. The combination, in a band-mill, with the standard having its front and rear sides counterparts of each other, of the upper wheel centrally mounted upon said standard, the lower wheel mounted beneath said upper wheel and the upper andlower guides mounted centrally upon said standard between said upper and lower wheels, substantially as described.
16. The combination, in a bandmill, of the standard having its front and rear sides counterparts of each other, the adjusting and operating devices constructed to be mounted on either side of said standard, the upper wheel mounted centrally upon said standard, the lower wheel arranged beneath said upper wheel, and the upper and lower saw-guides arranged centrally upon said standard between said upper and lower wheels, substantially as described.
17. The combination, in a band-mill, of the standard having its front and rear sides coun- In testimony whereof I have hereunto set ro terparts of each other, the upper wheel cenmy hand this 27th day of February, 1888.
trally mounted upon said standard, the lower wheel arranged beneath said upper wheel, the upper and lower guide-supports arranged cen- WVILLIAM PARISH.
trally upon said standard between said upper In presence of and lower wheels, and the reversible guides A. M. GAsKELL,
mounted on said supports, substantially as de- A. 0. PAUL. scribed.
US388069D Band-saw mill Expired - Lifetime US388069A (en)

Publications (1)

Publication Number Publication Date
US388069A true US388069A (en) 1888-08-21

Family

ID=2457050

Family Applications (1)

Application Number Title Priority Date Filing Date
US388069D Expired - Lifetime US388069A (en) Band-saw mill

Country Status (1)

Country Link
US (1) US388069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060109999A1 (en) * 2004-11-01 2006-05-25 Van Halteren Aart Z Electro-acoustical transducer and a transducer assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060109999A1 (en) * 2004-11-01 2006-05-25 Van Halteren Aart Z Electro-acoustical transducer and a transducer assembly
US8379899B2 (en) * 2004-11-01 2013-02-19 Sonion Nederland B.V. Electro-acoustical transducer and a transducer assembly

Similar Documents

Publication Publication Date Title
US388069A (en) Band-saw mill
US409261A (en) Circular-saw mill
US692428A (en) Band resawing-machine.
US1053746A (en) Saw tensioning and straightening machine.
US1280789A (en) Rossing-machine.
US780425A (en) Band-saw mill.
US499424A (en) Resawing-machine
US406323A (en) Band-saw mill
US428785A (en) Band-saw mill
US844022A (en) Machine for surfacing butchers' blocks.
US1250977A (en) Horizontal-turnable table for band-saws.
US344836A (en) Chain-feed surfacing and sizing machine
US709085A (en) Machine for rolling metal i-beams, channel-beams, &c.
US447812A (en) Power-feed sawing-machine
US876302A (en) Band sawing-machine.
US411098A (en) Resawing-machine
US877170A (en) Grinding-machine.
US432444A (en) Harvey segur
US548091A (en) Gang band-saw mill
US337912A (en) Band-saw machine
US987747A (en) Wood-sawing machine.
US465117A (en) Saw-mill
US406322A (en) Band-saw mill
US509557A (en) Band-saw mill
US889446A (en) Saw-log nigger.